Release/v3.2.1 (#2968)

- bump version
- bump pyright
- update release notes

.github/workflows/install_deps.py

@@ -110,7 +110,7 @@ def install_etcd():
 
 
 def install_postgres():
-    version = os.environ.get('PGVERSION', '16.1-1')
+    version = os.environ.get('PGVERSION', '15.1-1')
     platform = {'darwin': 'osx', 'win32': 'windows-x64', 'cygwin': 'windows-x64'}[sys.platform]
     if platform == 'osx':
         return subprocess.call(['brew', 'install', 'expect', 'postgresql@{0}'.format(version.split('.')[0])])

.github/workflows/mapping.py

@@ -1 +1 @@
-versions = {'etcd': '9.6', 'etcd3': '16', 'consul': '13', 'exhibitor': '12', 'raft': '14', 'kubernetes': '15'}
+versions = {'etcd': '9.6', 'etcd3': '16', 'consul': '13', 'exhibitor': '12', 'raft': '11', 'kubernetes': '15'}

.github/workflows/run_tests.py

@@ -30,7 +30,7 @@ def main():
         unbuffer = ['timeout', '900', 'unbuffer']
     else:
         if sys.platform == 'darwin':
-            version = os.environ.get('PGVERSION', '16.1-1')
+            version = os.environ.get('PGVERSION', '15.1-1')
             path = '/usr/local/opt/postgresql@{0}/bin:.'.format(version.split('.')[0])
             unbuffer = ['unbuffer']
         else:

.github/workflows/tests.yaml

@@ -85,7 +85,7 @@ jobs:
     env:
       DCS: ${{ matrix.dcs }}
       ETCDVERSION: 3.4.23
-      PGVERSION: 16.1-1  # for windows and macos
+      PGVERSION: 15.1-1  # for windows and macos
     strategy:
       fail-fast: false
       matrix:
@@ -174,7 +174,7 @@ jobs:
 
     - uses: jakebailey/pyright-action@v1
       with:
-        version: 1.1.347
+        version: 1.1.338
 
   docs:
     runs-on: ubuntu-latest

.gitignore

@@ -27,7 +27,7 @@ lib64
 pip-log.txt
 
 # Unit test / coverage reports
-.coverage*
+.coverage
 .tox
 nosetests.xml
 coverage.xml
@@ -35,7 +35,6 @@ htmlcov
 junit.xml
 features/output*
 dummy
-result.json
 
 # Translations
 *.mo

Dockerfile

@@ -1,6 +1,6 @@
 ## This Dockerfile is meant to aid in the building and debugging patroni whilst developing on your local machine
 ## It has all the necessary components to play/debug with a single node appliance, running etcd
-ARG PG_MAJOR=16
+ARG PG_MAJOR=15
 ARG COMPRESS=false
 ARG PGHOME=/home/postgres
 ARG PGDATA=$PGHOME/data
@@ -94,9 +94,9 @@ RUN set -ex \
         /usr/share/locale/??_?? \
         /usr/share/postgresql/*/man \
         /usr/share/postgresql-common/pg_wrapper \
-        /usr/share/vim/vim*/doc \
+        /usr/share/vim/vim80/doc \
-        /usr/share/vim/vim*/lang \
+        /usr/share/vim/vim80/lang \
-        /usr/share/vim/vim*/tutor \
+        /usr/share/vim/vim80/tutor \
 #        /var/lib/dpkg/info/* \
     && find /usr/bin -xtype l -delete \
     && find /var/log -type f -exec truncate --size 0 {} \; \
@@ -125,8 +125,6 @@ RUN if [ "$COMPRESS" = "true" ]; then \
         && /bin/busybox sh -c "(find $save_dirs -not -type d && cat /exclude /exclude && echo exclude) | sort | uniq -u | xargs /bin/busybox rm" \
         && /bin/busybox --install -s \
         && /bin/busybox sh -c "find $save_dirs -type d -depth -exec rmdir -p {} \; 2> /dev/null"; \
-    else \
-        /bin/busybox --install -s; \
     fi
 
 FROM scratch
@@ -145,7 +143,6 @@ ARG PGBIN=/usr/lib/postgresql/$PG_MAJOR/bin
 
 ENV LC_ALL=$LC_ALL LANG=$LANG EDITOR=/usr/bin/editor
 ENV PGDATA=$PGDATA PATH=$PATH:$PGBIN
-ENV ETCDCTL_API=3
 
 COPY patroni /patroni/
 COPY extras/confd/conf.d/haproxy.toml /etc/confd/conf.d/

Dockerfile.citus

@@ -1,6 +1,6 @@
 ## This Dockerfile is meant to aid in the building and debugging patroni whilst developing on your local machine
 ## It has all the necessary components to play/debug with a single node appliance, running etcd
-ARG PG_MAJOR=16
+ARG PG_MAJOR=15
 ARG COMPRESS=false
 ARG PGHOME=/home/postgres
 ARG PGDATA=$PGHOME/data
@@ -40,7 +40,7 @@ RUN set -ex \
         echo "deb [signed-by=/etc/apt/trusted.gpg.d/citusdata_community.gpg] https://packagecloud.io/citusdata/community/debian/ $(lsb_release -cs) main" > /etc/apt/sources.list.d/citusdata_community.list \
         && curl -sL https://packagecloud.io/citusdata/community/gpgkey | gpg --dearmor > /etc/apt/trusted.gpg.d/citusdata_community.gpg \
         && apt-get update -y \
-        && apt-get -y install postgresql-$PG_MAJOR-citus-12.1; \
+        && apt-get -y install postgresql-$PG_MAJOR-citus-11.3; \
     fi \
 \
     # Cleanup all locales but en_US.UTF-8
@@ -113,9 +113,9 @@ RUN set -ex \
         /usr/share/locale/??_?? \
         /usr/share/postgresql/*/man \
         /usr/share/postgresql-common/pg_wrapper \
-        /usr/share/vim/vim*/doc \
+        /usr/share/vim/vim80/doc \
-        /usr/share/vim/vim*/lang \
+        /usr/share/vim/vim80/lang \
-        /usr/share/vim/vim*/tutor \
+        /usr/share/vim/vim80/tutor \
 #        /var/lib/dpkg/info/* \
     && find /usr/bin -xtype l -delete \
     && find /var/log -type f -exec truncate --size 0 {} \; \
@@ -164,7 +164,6 @@ ARG PGBIN=/usr/lib/postgresql/$PG_MAJOR/bin
 
 ENV LC_ALL=$LC_ALL LANG=$LANG EDITOR=/usr/bin/editor
 ENV PGDATA=$PGDATA PATH=$PATH:$PGBIN
-ENV ETCDCTL_API=3
 
 COPY patroni /patroni/
 COPY extras/confd/conf.d/haproxy.toml /etc/confd/conf.d/

README.rst

@@ -151,7 +151,7 @@ run:
 YAML Configuration
 ==================
 
-Go `here <https://github.com/zalando/patroni/blob/master/docs/dynamic_configuration.rst>`__ for comprehensive information about settings for etcd, consul, and ZooKeeper. And for an example, see `postgres0.yml <https://github.com/zalando/patroni/blob/master/postgres0.yml>`__.
+Go `here <https://github.com/zalando/patroni/blob/master/docs/SETTINGS.rst>`__ for comprehensive information about settings for etcd, consul, and ZooKeeper. And for an example, see `postgres0.yml <https://github.com/zalando/patroni/blob/master/postgres0.yml>`__.
 
 =========================
 Environment Configuration

docker-compose-citus.yml

@@ -19,6 +19,7 @@ services:
         image: ${PATRONI_TEST_IMAGE:-patroni-citus}
         networks: [ demo ]
         environment:
+            ETCDCTL_API: 3
             ETCD_LISTEN_PEER_URLS: http://0.0.0.0:2380
             ETCD_LISTEN_CLIENT_URLS: http://0.0.0.0:2379
             ETCD_INITIAL_CLUSTER: etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380
@@ -27,19 +28,19 @@ services:
             ETCD_UNSUPPORTED_ARCH: arm64
         container_name: demo-etcd1
         hostname: etcd1
-        command: etcd --name etcd1 --initial-advertise-peer-urls http://etcd1:2380
+        command: etcd -name etcd1 -initial-advertise-peer-urls http://etcd1:2380
 
     etcd2:
         <<: *etcd
         container_name: demo-etcd2
         hostname: etcd2
-        command: etcd --name etcd2 --initial-advertise-peer-urls http://etcd2:2380
+        command: etcd -name etcd2 -initial-advertise-peer-urls http://etcd2:2380
 
     etcd3:
         <<: *etcd
         container_name: demo-etcd3
         hostname: etcd3
-        command: etcd --name etcd3 --initial-advertise-peer-urls http://etcd3:2380
+        command: etcd -name etcd3 -initial-advertise-peer-urls http://etcd3:2380
 
     haproxy:
         image: ${PATRONI_TEST_IMAGE:-patroni-citus}
@@ -52,6 +53,7 @@ services:
             - "5001:5001"  # Load-balancing across workers primaries
         command: haproxy
         environment: &haproxy_env
+            ETCDCTL_API: 3
             ETCDCTL_ENDPOINTS: http://etcd1:2379,http://etcd2:2379,http://etcd3:2379
             PATRONI_ETCD3_HOSTS: "'etcd1:2379','etcd2:2379','etcd3:2379'"
             PATRONI_SCOPE: demo

docker-compose.yml

@@ -25,19 +25,19 @@ services:
             ETCD_UNSUPPORTED_ARCH: arm64
         container_name: demo-etcd1
         hostname: etcd1
-        command: etcd --name etcd1 --initial-advertise-peer-urls http://etcd1:2380
+        command: etcd -name etcd1 -initial-advertise-peer-urls http://etcd1:2380
 
     etcd2:
         <<: *etcd
         container_name: demo-etcd2
         hostname: etcd2
-        command: etcd --name etcd2 --initial-advertise-peer-urls http://etcd2:2380
+        command: etcd -name etcd2 -initial-advertise-peer-urls http://etcd2:2380
 
     etcd3:
         <<: *etcd
         container_name: demo-etcd3
         hostname: etcd3
-        command: etcd --name etcd3 --initial-advertise-peer-urls http://etcd3:2380
+        command: etcd -name etcd3 -initial-advertise-peer-urls http://etcd3:2380
 
     haproxy:
         image: ${PATRONI_TEST_IMAGE:-patroni}

docker/README.md

@@ -19,97 +19,102 @@ The haproxy listens on ports 5000 (connects to the primary) and 5001 (does load-
 
 Example session:
 
-    $ docker compose up -d
+    $ docker-compose up -d
-    ✔ Network patroni_demo     Created
+    Creating demo-haproxy ...
-    ✔ Container demo-etcd1     Started
+    Creating demo-patroni2 ...
-    ✔ Container demo-haproxy   Started
+    Creating demo-patroni1 ...
-    ✔ Container demo-patroni1  Started
+    Creating demo-patroni3 ...
-    ✔ Container demo-patroni2  Started
+    Creating demo-etcd2 ...
-    ✔ Container demo-patroni3  Started
+    Creating demo-etcd1 ...
-    ✔ Container demo-etcd2     Started
+    Creating demo-etcd3 ...
-    ✔ Container demo-etcd3     Started
+    Creating demo-haproxy
+    Creating demo-patroni2
+    Creating demo-patroni1
+    Creating demo-patroni3
+    Creating demo-etcd1
+    Creating demo-etcd2
+    Creating demo-etcd2 ... done
 
     $ docker ps
-    CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS          PORTS                                                           NAMES
+    CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                              NAMES
-    a37bcec56726   patroni   "/bin/sh /entrypoint…"   15 minutes ago   Up 15 minutes                                                                   demo-etcd3
+    5b7a90b4cfbf        patroni             "/bin/sh /entrypoint…"   29 seconds ago      Up 27 seconds                                          demo-etcd2
-    034ab73868a8   patroni   "/bin/sh /entrypoint…"   15 minutes ago   Up 15 minutes                                                                   demo-patroni2
+    e30eea5222f2        patroni             "/bin/sh /entrypoint…"   29 seconds ago      Up 27 seconds                                          demo-etcd1
-    03837736f710   patroni   "/bin/sh /entrypoint…"   15 minutes ago   Up 15 minutes                                                                   demo-patroni3
+    83bcf3cb208f        patroni             "/bin/sh /entrypoint…"   29 seconds ago      Up 27 seconds                                          demo-etcd3
-    22815c3d85b3   patroni   "/bin/sh /entrypoint…"   15 minutes ago   Up 15 minutes                                                                   demo-etcd2
+    922532c56e7d        patroni             "/bin/sh /entrypoint…"   29 seconds ago      Up 28 seconds                                          demo-patroni3
-    814b4304d132   patroni   "/bin/sh /entrypoint…"   15 minutes ago   Up 15 minutes   0.0.0.0:5000-5001->5000-5001/tcp, :::5000-5001->5000-5001/tcp   demo-haproxy
+    14f875e445f3        patroni             "/bin/sh /entrypoint…"   29 seconds ago      Up 28 seconds                                          demo-patroni2
-    6375b0ba2d0a   patroni   "/bin/sh /entrypoint…"   15 minutes ago   Up 15 minutes                                                                   demo-patroni1
+    110d1073b383        patroni             "/bin/sh /entrypoint…"   29 seconds ago      Up 28 seconds                                          demo-patroni1
-    aef8bf3ee91f   patroni   "/bin/sh /entrypoint…"   15 minutes ago   Up 15 minutes                                                                   demo-etcd1
+    5af5e6e36028        patroni             "/bin/sh /entrypoint…"   29 seconds ago      Up 28 seconds       0.0.0.0:5000-5001->5000-5001/tcp   demo-haproxy
 
     $ docker logs demo-patroni1
-    2023-11-21 09:04:33,547 INFO: Selected new etcd server http://172.29.0.3:2379
+    2019-02-20 08:19:32,714 INFO: Failed to import patroni.dcs.consul
-    2023-11-21 09:04:33,605 INFO: Lock owner: None; I am patroni1
+    2019-02-20 08:19:32,737 INFO: Selected new etcd server http://etcd3:2379
-    2023-11-21 09:04:33,693 INFO: trying to bootstrap a new cluster
+    2019-02-20 08:19:35,140 INFO: Lock owner: None; I am patroni1
+    2019-02-20 08:19:35,174 INFO: trying to bootstrap a new cluster
     ...
-    2023-11-21 09:04:34.920 UTC [43] LOG:  starting PostgreSQL 15.5 (Debian 15.5-1.pgdg120+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit
+    2019-02-20 08:19:39,310 INFO: postmaster pid=37
-    2023-11-21 09:04:34.921 UTC [43] LOG:  listening on IPv4 address "0.0.0.0", port 5432
+    2019-02-20 08:19:39.314 UTC [37] LOG:  listening on IPv4 address "0.0.0.0", port 5432
-    2023-11-21 09:04:34,922 INFO: postmaster pid=43
+    2019-02-20 08:19:39.321 UTC [37] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
-    2023-11-21 09:04:34.922 UTC [43] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
+    2019-02-20 08:19:39.353 UTC [39] LOG:  database system was shut down at 2019-02-20 08:19:36 UTC
-    2023-11-21 09:04:34.925 UTC [47] LOG:  database system was shut down at 2023-11-21 09:04:34 UTC
+    2019-02-20 08:19:39.354 UTC [40] FATAL:  the database system is starting up
-    2023-11-21 09:04:34.928 UTC [43] LOG:  database system is ready to accept connections
+    localhost:5432 - rejecting connections
+    2019-02-20 08:19:39.369 UTC [37] LOG:  database system is ready to accept connections
     localhost:5432 - accepting connections
-    localhost:5432 - accepting connections
+    2019-02-20 08:19:39,383 INFO: establishing a new patroni connection to the postgres cluster
-    2023-11-21 09:04:34,938 INFO: establishing a new patroni heartbeat connection to postgres
+    2019-02-20 08:19:39,408 INFO: running post_bootstrap
-    2023-11-21 09:04:34,992 INFO: running post_bootstrap
+    2019-02-20 08:19:39,432 WARNING: Could not activate Linux watchdog device: "Can't open watchdog device: [Errno 2] No such file or directory: '/dev/watchdog'"
-    2023-11-21 09:04:35,004 WARNING: User creation via "bootstrap.users" will be removed in v4.0.0
+    2019-02-20 08:19:39,515 INFO: initialized a new cluster
-    2023-11-21 09:04:35,009 WARNING: Could not activate Linux watchdog device: Can't open watchdog device: [Errno 2] No such file or directory: '/dev/watchdog'
+    2019-02-20 08:19:49,424 INFO: Lock owner: patroni1; I am patroni1
-    2023-11-21 09:04:35,189 INFO: initialized a new cluster
+    2019-02-20 08:19:49,447 INFO: Lock owner: patroni1; I am patroni1
-    2023-11-21 09:04:35,328 INFO: no action. I am (patroni1), the leader with the lock
+    2019-02-20 08:19:49,480 INFO: no action.  i am the leader with the lock
-    2023-11-21 09:04:43,824 INFO: establishing a new patroni restapi connection to postgres
+    2019-02-20 08:19:59,422 INFO: Lock owner: patroni1; I am patroni1
-    2023-11-21 09:04:45,322 INFO: no action. I am (patroni1), the leader with the lock
-    2023-11-21 09:04:55,320 INFO: no action. I am (patroni1), the leader with the lock
-    ...
 
     $ docker exec -ti demo-patroni1 bash
     postgres@patroni1:~$ patronictl list
-    + Cluster: demo (7303838734793224214) --------+----+-----------+
+    +---------+----------+------------+--------+---------+----+-----------+
-    | Member   | Host       | Role    | State     | TL | Lag in MB |
+    | Cluster |  Member  |    Host    |  Role  |  State  | TL | Lag in MB |
-    +----------+------------+---------+-----------+----+-----------+
+    +---------+----------+------------+--------+---------+----+-----------+
-    | patroni1 | 172.29.0.2 | Leader  | running   |  1 |           |
+    |   demo  | patroni1 | 172.22.0.3 | Leader | running |  1 |         0 |
-    | patroni2 | 172.29.0.6 | Replica | streaming |  1 |         0 |
+    |   demo  | patroni2 | 172.22.0.7 |        | running |  1 |         0 |
-    | patroni3 | 172.29.0.5 | Replica | streaming |  1 |         0 |
+    |   demo  | patroni3 | 172.22.0.4 |        | running |  1 |         0 |
-    +----------+------------+---------+-----------+----+-----------+
+    +---------+----------+------------+--------+---------+----+-----------+
 
     postgres@patroni1:~$ etcdctl get --keys-only --prefix /service/demo
     /service/demo/config
     /service/demo/initialize
     /service/demo/leader
+    /service/demo/members/
     /service/demo/members/patroni1
     /service/demo/members/patroni2
     /service/demo/members/patroni3
-    /service/demo/status
+    /service/demo/optime/
+    /service/demo/optime/leader
 
     postgres@patroni1:~$ etcdctl member list
-    2bf3e2ceda5d5960, started, etcd2, http://etcd2:2380, http://172.29.0.3:2379
+    1bab629f01fa9065: name=etcd3 peerURLs=http://etcd3:2380 clientURLs=http://etcd3:2379 isLeader=false
-    55b3264e129c7005, started, etcd3, http://etcd3:2380, http://172.29.0.7:2379
+    8ecb6af518d241cc: name=etcd2 peerURLs=http://etcd2:2380 clientURLs=http://etcd2:2379 isLeader=true
-    acce7233f8ec127e, started, etcd1, http://etcd1:2380, http://172.29.0.8:2379
+    b2e169fcb8a34028: name=etcd1 peerURLs=http://etcd1:2380 clientURLs=http://etcd1:2379 isLeader=false
-
-
     postgres@patroni1:~$ exit
 
     $ docker exec -ti demo-haproxy bash
     postgres@haproxy:~$ psql -h localhost -p 5000 -U postgres -W
     Password: postgres
-    psql (15.5 (Debian 15.5-1.pgdg120+1))
+    psql (11.2 (Ubuntu 11.2-1.pgdg18.04+1), server 10.7 (Debian 10.7-1.pgdg90+1))
     Type "help" for help.
 
-    postgres=# SELECT pg_is_in_recovery();
+    localhost/postgres=# select pg_is_in_recovery();
      pg_is_in_recovery
     ───────────────────
      f
     (1 row)
 
-    postgres=# \q
+    localhost/postgres=# \q
 
-    postgres@haproxy:~$ psql -h localhost -p 5001 -U postgres -W
+    $postgres@haproxy:~ psql -h localhost -p 5001 -U postgres -W
     Password: postgres
-    psql (15.5 (Debian 15.5-1.pgdg120+1))
+    psql (11.2 (Ubuntu 11.2-1.pgdg18.04+1), server 10.7 (Debian 10.7-1.pgdg90+1))
     Type "help" for help.
 
-    postgres=# SELECT pg_is_in_recovery();
+    localhost/postgres=# select pg_is_in_recovery();
      pg_is_in_recovery
     ───────────────────
      t
@@ -122,86 +127,81 @@ The haproxy listens on ports 5000 (connects to the coordinator primary) and 5001
 
 Example session:
 
-    $ docker compose -f docker-compose-citus.yml up -d
+    $ docker-compose -f docker-compose-citus.yml up -d
-    ✔ Network patroni_demo    Created
+    Creating demo-work2-1 ... done
-    ✔ Container demo-coord2   Started
+    Creating demo-work1-1 ... done
-    ✔ Container demo-work2-2  Started
+    Creating demo-etcd2   ... done
-    ✔ Container demo-etcd1    Started
+    Creating demo-etcd1   ... done
-    ✔ Container demo-haproxy  Started
+    Creating demo-coord3  ... done
-    ✔ Container demo-work1-1  Started
+    Creating demo-etcd3   ... done
-    ✔ Container demo-work2-1  Started
+    Creating demo-coord1  ... done
-    ✔ Container demo-work1-2  Started
+    Creating demo-haproxy ... done
-    ✔ Container demo-coord1   Started
+    Creating demo-work2-2 ... done
-    ✔ Container demo-etcd3    Started
+    Creating demo-coord2  ... done
-    ✔ Container demo-coord3   Started
+    Creating demo-work1-2 ... done
-    ✔ Container demo-etcd2    Started
-
 
     $ docker ps
-    CONTAINER ID   IMAGE           COMMAND                  CREATED          STATUS          PORTS                                                           NAMES
+    CONTAINER ID   IMAGE                  COMMAND                  CREATED         STATUS         PORTS                              NAMES
-    79c95492fac9   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-etcd3
+    852d8885a612   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 3 seconds                                      demo-coord3
-    77eb82d0f0c1   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-work2-1
+    cdd692f947ab   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 3 seconds                                      demo-work1-2
-    03dacd7267ef   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-etcd1
+    9f4e340b36da   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 3 seconds                                      demo-etcd3
-    db9206c66f85   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-etcd2
+    d69c129a960a   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 4 seconds                                      demo-etcd1
-    9a0fef7b7dd4   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-work1-2
+    c5849689b8cd   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 4 seconds                                      demo-coord1
-    f06b031d99dc   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-work2-2
+    c9d72bd6217d   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 3 seconds                                      demo-work2-1
-    f7c58545f314   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-coord2
+    24b1b43efa05   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 4 seconds                                      demo-coord2
-    383f9e7e188a   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-work1-1
+    cb0cc2b4ca0a   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 3 seconds                                      demo-work2-2
-    f02e96dcc9d6   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-coord3
+    9796c6b8aad5   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 5 seconds                                      demo-work1-1
-    6945834b7056   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes                                                                   demo-coord1
+    8baccd74dcae   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 4 seconds                                      demo-etcd2
-    b96ca42f785d   patroni-citus   "/bin/sh /entrypoint…"   11 minutes ago   Up 11 minutes   0.0.0.0:5000-5001->5000-5001/tcp, :::5000-5001->5000-5001/tcp   demo-haproxy
+    353ec62a0187   patroni-citus          "/bin/sh /entrypoint…"   6 seconds ago   Up 4 seconds   0.0.0.0:5000-5001->5000-5001/tcp   demo-haproxy
-
 
     $ docker logs demo-coord1
-    2023-11-21 09:36:14,293 INFO: Selected new etcd server http://172.30.0.4:2379
+    2023-01-05 15:09:31,295 INFO: Selected new etcd server http://172.27.0.4:2379
-    2023-11-21 09:36:14,390 INFO: Lock owner: None; I am coord1
+    2023-01-05 15:09:31,388 INFO: Lock owner: None; I am coord1
-    2023-11-21 09:36:14,478 INFO: trying to bootstrap a new cluster
+    2023-01-05 15:09:31,501 INFO: trying to bootstrap a new cluster
     ...
-    2023-11-21 09:36:16,475 INFO: postmaster pid=52
+    2023-01-05 15:09:45,096 INFO: postmaster pid=39
     localhost:5432 - no response
-    2023-11-21 09:36:16.495 UTC [52] LOG:  starting PostgreSQL 15.5 (Debian 15.5-1.pgdg120+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit
+    2023-01-05 15:09:45.137 UTC [39] LOG:  starting PostgreSQL 15.1 (Debian 15.1-1.pgdg110+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 10.2.1-6) 10.2.1 20210110, 64-bit
-    2023-11-21 09:36:16.495 UTC [52] LOG:  listening on IPv4 address "0.0.0.0", port 5432
+    2023-01-05 15:09:45.137 UTC [39] LOG:  listening on IPv4 address "0.0.0.0", port 5432
-    2023-11-21 09:36:16.496 UTC [52] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
+    2023-01-05 15:09:45.152 UTC [39] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
-    2023-11-21 09:36:16.498 UTC [56] LOG:  database system was shut down at 2023-11-21 09:36:15 UTC
+    2023-01-05 15:09:45.177 UTC [43] LOG:  database system was shut down at 2023-01-05 15:09:32 UTC
-    2023-11-21 09:36:16.501 UTC [52] LOG:  database system is ready to accept connections
+    2023-01-05 15:09:45.193 UTC [39] LOG:  database system is ready to accept connections
     localhost:5432 - accepting connections
     localhost:5432 - accepting connections
-    2023-11-21 09:36:17,509 INFO: establishing a new patroni heartbeat connection to postgres
+    2023-01-05 15:09:46,139 INFO: establishing a new patroni connection to the postgres cluster
-    2023-11-21 09:36:17,569 INFO: running post_bootstrap
+    2023-01-05 15:09:46,208 INFO: running post_bootstrap
-    2023-11-21 09:36:17,593 WARNING: User creation via "bootstrap.users" will be removed in v4.0.0
+    2023-01-05 15:09:47.209 UTC [55] LOG:  starting maintenance daemon on database 16386 user 10
-    2023-11-21 09:36:17,783 INFO: establishing a new patroni restapi connection to postgres
+    2023-01-05 15:09:47.209 UTC [55] CONTEXT:  Citus maintenance daemon for database 16386 user 10
-    2023-11-21 09:36:17,969 WARNING: Could not activate Linux watchdog device: Can't open watchdog device: [Errno 2] No such file or directory: '/dev/watchdog'
+    2023-01-05 15:09:47,215 WARNING: Could not activate Linux watchdog device: "Can't open watchdog device: [Errno 2] No such file or directory: '/dev/watchdog'"
-    2023-11-21 09:36:17.969 UTC [70] LOG:  starting maintenance daemon on database 16386 user 10
+    2023-01-05 15:09:47.446 UTC [41] LOG:  checkpoint starting: immediate force wait
-    2023-11-21 09:36:17.969 UTC [70] CONTEXT:  Citus maintenance daemon for database 16386 user 10
+    2023-01-05 15:09:47,466 INFO: initialized a new cluster
-    2023-11-21 09:36:18.159 UTC [54] LOG:  checkpoint starting: immediate force wait
+    2023-01-05 15:09:47,594 DEBUG: query(SELECT nodeid, groupid, nodename, nodeport, noderole FROM pg_catalog.pg_dist_node WHERE noderole = 'primary', ())
-    2023-11-21 09:36:18,162 INFO: initialized a new cluster
+    2023-01-05 15:09:47,594 INFO: establishing a new patroni connection to the postgres cluster
-    2023-11-21 09:36:18,164 INFO: Lock owner: coord1; I am coord1
+    2023-01-05 15:09:47,467 INFO: Lock owner: coord1; I am coord1
-    2023-11-21 09:36:18,297 INFO: Enabled synchronous replication
+    2023-01-05 15:09:47,613 DEBUG: query(SELECT pg_catalog.citus_set_coordinator_host(%s, %s, 'primary', 'default'), ('172.27.0.6', 5432))
-    2023-11-21 09:36:18,298 DEBUG: Adding the new task: PgDistNode(nodeid=None,group=0,host=172.30.0.3,port=5432,event=after_promote)
+    2023-01-05 15:09:47,924 INFO: no action. I am (coord1), the leader with the lock
-    2023-11-21 09:36:18,298 DEBUG: Adding the new task: PgDistNode(nodeid=None,group=1,host=172.30.0.7,port=5432,event=after_promote)
+    2023-01-05 15:09:51.282 UTC [41] LOG:  checkpoint complete: wrote 1086 buffers (53.0%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.029 s, sync=3.746 s, total=3.837 s; sync files=280, longest=0.028 s, average=0.014 s; distance=8965 kB, estimate=8965 kB
-    2023-11-21 09:36:18,298 DEBUG: Adding the new task: PgDistNode(nodeid=None,group=2,host=172.30.0.8,port=5432,event=after_promote)
+    2023-01-05 15:09:51.283 UTC [41] LOG:  checkpoint starting: immediate force wait
-    2023-11-21 09:36:18,299 DEBUG: query(SELECT nodeid, groupid, nodename, nodeport, noderole FROM pg_catalog.pg_dist_node WHERE noderole = 'primary', ())
+    2023-01-05 15:09:51.495 UTC [41] LOG:  checkpoint complete: wrote 18 buffers (0.9%); 0 WAL file(s) added, 0 removed, 0 recycled; write=0.044 s, sync=0.091 s, total=0.212 s; sync files=15, longest=0.015 s, average=0.007 s; distance=67 kB, estimate=8076 kB
-    2023-11-21 09:36:18,299 INFO: establishing a new patroni citus connection to postgres
+    2023-01-05 15:09:57,467 INFO: Lock owner: coord1; I am coord1
-    2023-11-21 09:36:18,323 DEBUG: query(SELECT pg_catalog.citus_add_node(%s, %s, %s, 'primary', 'default'), ('172.30.0.7', 5432, 1))
+    2023-01-05 15:09:57,569 INFO: Assigning synchronous standby status to ['coord3']
-    2023-11-21 09:36:18,361 INFO: no action. I am (coord1), the leader with the lock
-    2023-11-21 09:36:18,393 DEBUG: query(SELECT pg_catalog.citus_add_node(%s, %s, %s, 'primary', 'default'), ('172.30.0.8', 5432, 2))
-    2023-11-21 09:36:28,164 INFO: Lock owner: coord1; I am coord1
-    2023-11-21 09:36:28,251 INFO: Assigning synchronous standby status to ['coord3']
     server signaled
-    2023-11-21 09:36:28.435 UTC [52] LOG:  received SIGHUP, reloading configuration files
+    2023-01-05 15:09:57.574 UTC [39] LOG:  received SIGHUP, reloading configuration files
-    2023-11-21 09:36:28.436 UTC [52] LOG:  parameter "synchronous_standby_names" changed to "coord3"
+    2023-01-05 15:09:57.580 UTC [39] LOG:  parameter "synchronous_standby_names" changed to "coord3"
-    2023-11-21 09:36:28.641 UTC [83] LOG:  standby "coord3" is now a synchronous standby with priority 1
+    2023-01-05 15:09:59,637 INFO: Synchronous standby status assigned to ['coord3']
-    2023-11-21 09:36:28.641 UTC [83] STATEMENT:  START_REPLICATION SLOT "coord3" 0/3000000 TIMELINE 1
+    2023-01-05 15:09:59,638 DEBUG: query(SELECT pg_catalog.citus_add_node(%s, %s, %s, 'primary', 'default'), ('172.27.0.2', 5432, 1))
-    2023-11-21 09:36:30,582 INFO: Synchronous standby status assigned to ['coord3']
+    2023-01-05 15:09:59.690 UTC [67] LOG:  standby "coord3" is now a synchronous standby with priority 1
-    2023-11-21 09:36:30,626 INFO: no action. I am (coord1), the leader with the lock
+    2023-01-05 15:09:59.690 UTC [67] STATEMENT:  START_REPLICATION SLOT "coord3" 0/3000000 TIMELINE 1
-    2023-11-21 09:36:38,250 INFO: no action. I am (coord1), the leader with the lock
+    2023-01-05 15:09:59,694 INFO: no action. I am (coord1), the leader with the lock
-    ...
+    2023-01-05 15:09:59,704 DEBUG: query(SELECT pg_catalog.citus_add_node(%s, %s, %s, 'primary', 'default'), ('172.27.0.8', 5432, 2))
+    2023-01-05 15:10:07,625 INFO: no action. I am (coord1), the leader with the lock
+    2023-01-05 15:10:17,579 INFO: no action. I am (coord1), the leader with the lock
 
     $ docker exec -ti demo-haproxy bash
     postgres@haproxy:~$ etcdctl member list
-    2b28411e74c0c281, started, etcd3, http://etcd3:2380, http://172.30.0.4:2379
+    1bab629f01fa9065, started, etcd3, http://etcd3:2380, http://172.27.0.10:2379
-    6c70137d27cfa6c1, started, etcd2, http://etcd2:2380, http://172.30.0.5:2379
+    8ecb6af518d241cc, started, etcd2, http://etcd2:2380, http://172.27.0.4:2379
-    a28f9a70ebf21304, started, etcd1, http://etcd1:2380, http://172.30.0.6:2379
+    b2e169fcb8a34028, started, etcd1, http://etcd1:2380, http://172.27.0.7:2379
 
     postgres@haproxy:~$ etcdctl get --keys-only --prefix /service/demo
     /service/demo/0/config
@@ -229,7 +229,7 @@ Example session:
 
     postgres@haproxy:~$ psql -h localhost -p 5000 -U postgres -d citus
     Password for user postgres: postgres
-    psql (15.5 (Debian 15.5-1.pgdg120+1))
+    psql (15.1 (Debian 15.1-1.pgdg110+1))
     SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, compression: off)
     Type "help" for help.
 
@@ -240,67 +240,67 @@ Example session:
     (1 row)
 
     citus=# table pg_dist_node;
-     nodeid | groupid |  nodename  | nodeport | noderack | hasmetadata | isactive | noderole | nodecluster | metadatasynced | shouldhaveshards 
+     nodeid | groupid |  nodename  | nodeport | noderack | hasmetadata | isactive | noderole | nodecluster | metadatasynced | shouldhaveshards
     --------+---------+------------+----------+----------+-------------+----------+----------+-------------+----------------+------------------
-          1 |       0 | 172.30.0.3 |     5432 | default  | t           | t        | primary  | default     | t              | f
+          1 |       0 | 172.27.0.6 |     5432 | default  | t           | t        | primary  | default     | t              | f
-          2 |       1 | 172.30.0.7 |     5432 | default  | t           | t        | primary  | default     | t              | t
+          2 |       1 | 172.27.0.2 |     5432 | default  | t           | t        | primary  | default     | t              | t
-          3 |       2 | 172.30.0.8 |     5432 | default  | t           | t        | primary  | default     | t              | t
+          3 |       2 | 172.27.0.8 |     5432 | default  | t           | t        | primary  | default     | t              | t
     (3 rows)
 
     citus=# \q
 
     postgres@haproxy:~$ patronictl list
-    + Citus cluster: demo ----------+--------------+-----------+----+-----------+
+    + Citus cluster: demo ----------+--------------+---------+----+-----------+
-    | Group | Member  | Host        | Role         | State     | TL | Lag in MB |
+    | Group | Member  | Host        | Role         | State   | TL | Lag in MB |
-    +-------+---------+-------------+--------------+-----------+----+-----------+
+    +-------+---------+-------------+--------------+---------+----+-----------+
-    |     0 | coord1  | 172.30.0.3  | Leader       | running   |  1 |           |
+    |     0 | coord1  | 172.27.0.6  | Leader       | running |  1 |           |
-    |     0 | coord2  | 172.30.0.12 | Replica      | streaming |  1 |         0 |
+    |     0 | coord2  | 172.27.0.5  | Replica      | running |  1 |         0 |
-    |     0 | coord3  | 172.30.0.2  | Sync Standby | streaming |  1 |         0 |
+    |     0 | coord3  | 172.27.0.9  | Sync Standby | running |  1 |         0 |
-    |     1 | work1-1 | 172.30.0.7  | Leader       | running   |  1 |           |
+    |     1 | work1-1 | 172.27.0.2  | Leader       | running |  1 |           |
-    |     1 | work1-2 | 172.30.0.10 | Sync Standby | streaming |  1 |         0 |
+    |     1 | work1-2 | 172.27.0.12 | Sync Standby | running |  1 |         0 |
-    |     2 | work2-1 | 172.30.0.8  | Leader       | running   |  1 |           |
+    |     2 | work2-1 | 172.27.0.11 | Sync Standby | running |  1 |         0 |
-    |     2 | work2-2 | 172.30.0.11 | Sync Standby | streaming |  1 |         0 |
+    |     2 | work2-2 | 172.27.0.8  | Leader       | running |  1 |           |
-    +-------+---------+-------------+--------------+-----------+----+-----------+
+    +-------+---------+-------------+--------------+---------+----+-----------+
-
 
     postgres@haproxy:~$ patronictl switchover --group 2 --force
     Current cluster topology
-    + Citus cluster: demo (group: 2, 7303846899271086103) --+-----------+
+    + Citus cluster: demo (group: 2, 7185185529556963355) +-----------+
-    | Member  | Host        | Role         | State     | TL | Lag in MB |
+    | Member  | Host        | Role         | State   | TL | Lag in MB |
-    +---------+-------------+--------------+-----------+----+-----------+
+    +---------+-------------+--------------+---------+----+-----------+
-    | work2-1 | 172.30.0.8  | Leader       | running   |  1 |           |
+    | work2-1 | 172.27.0.11 | Sync Standby | running |  1 |         0 |
-    | work2-2 | 172.30.0.11 | Sync Standby | streaming |  1 |         0 |
+    | work2-2 | 172.27.0.8  | Leader       | running |  1 |           |
-    +---------+-------------+--------------+-----------+----+-----------+
+    +---------+-------------+--------------+---------+----+-----------+
-    2023-11-21 09:44:15.83849 Successfully switched over to "work2-2"
+    2023-01-05 15:29:29.54204 Successfully switched over to "work2-1"
-    + Citus cluster: demo (group: 2, 7303846899271086103) -------+
+    + Citus cluster: demo (group: 2, 7185185529556963355) -------+
     | Member  | Host        | Role    | State   | TL | Lag in MB |
     +---------+-------------+---------+---------+----+-----------+
-    | work2-1 | 172.30.0.8  | Replica | stopped |    |   unknown |
+    | work2-1 | 172.27.0.11 | Leader  | running |  1 |           |
-    | work2-2 | 172.30.0.11 | Leader  | running |  1 |           |
+    | work2-2 | 172.27.0.8  | Replica | stopped |    |   unknown |
     +---------+-------------+---------+---------+----+-----------+
 
     postgres@haproxy:~$ patronictl list
-    + Citus cluster: demo ----------+--------------+-----------+----+-----------+
+    + Citus cluster: demo ----------+--------------+---------+----+-----------+
-    | Group | Member  | Host        | Role         | State     | TL | Lag in MB |
+    | Group | Member  | Host        | Role         | State   | TL | Lag in MB |
-    +-------+---------+-------------+--------------+-----------+----+-----------+
+    +-------+---------+-------------+--------------+---------+----+-----------+
-    |     0 | coord1  | 172.30.0.3  | Leader       | running   |  1 |           |
+    |     0 | coord1  | 172.27.0.6  | Leader       | running |  1 |           |
-    |     0 | coord2  | 172.30.0.12 | Replica      | streaming |  1 |         0 |
+    |     0 | coord2  | 172.27.0.5  | Replica      | running |  1 |         0 |
-    |     0 | coord3  | 172.30.0.2  | Sync Standby | streaming |  1 |         0 |
+    |     0 | coord3  | 172.27.0.9  | Sync Standby | running |  1 |         0 |
-    |     1 | work1-1 | 172.30.0.7  | Leader       | running   |  1 |           |
+    |     1 | work1-1 | 172.27.0.2  | Leader       | running |  1 |           |
-    |     1 | work1-2 | 172.30.0.10 | Sync Standby | streaming |  1 |         0 |
+    |     1 | work1-2 | 172.27.0.12 | Sync Standby | running |  1 |         0 |
-    |     2 | work2-1 | 172.30.0.8  | Sync Standby | streaming |  2 |         0 |
+    |     2 | work2-1 | 172.27.0.11 | Leader       | running |  2 |           |
-    |     2 | work2-2 | 172.30.0.11 | Leader       | running   |  2 |           |
+    |     2 | work2-2 | 172.27.0.8  | Sync Standby | running |  2 |         0 |
-    +-------+---------+-------------+--------------+-----------+----+-----------+
+    +-------+---------+-------------+--------------+---------+----+-----------+
 
     postgres@haproxy:~$ psql -h localhost -p 5000 -U postgres -d citus
-    psql (15.5 (Debian 15.5-1.pgdg120+1))
+    Password for user postgres: postgres
+    psql (15.1 (Debian 15.1-1.pgdg110+1))
     SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, compression: off)
     Type "help" for help.
 
     citus=# table pg_dist_node;
-     nodeid | groupid |  nodename   | nodeport | noderack | hasmetadata | isactive | noderole | nodecluster | metadatasynced | shouldhaveshards 
+     nodeid | groupid |  nodename   | nodeport | noderack | hasmetadata | isactive | noderole | nodecluster | metadatasynced | shouldhaveshards
     --------+---------+-------------+----------+----------+-------------+----------+----------+-------------+----------------+------------------
-          1 |       0 | 172.30.0.3  |     5432 | default  | t           | t        | primary  | default     | t              | f
+          1 |       0 | 172.27.0.6  |     5432 | default  | t           | t        | primary  | default     | t              | f
-          3 |       2 | 172.30.0.11 |     5432 | default  | t           | t        | primary  | default     | t              | t
+          3 |       2 | 172.27.0.11 |     5432 | default  | t           | t        | primary  | default     | t              | t
-          2 |       1 | 172.30.0.7  |     5432 | default  | t           | t        | primary  | default     | t              | t
+          2 |       1 | 172.27.0.2  |     5432 | default  | t           | t        | primary  | default     | t              | t
     (3 rows)

docker/entrypoint.sh

@@ -13,8 +13,6 @@ readonly PATRONI_NAMESPACE="${PATRONI_NAMESPACE%/}"
 DOCKER_IP=$(hostname --ip-address)
 readonly DOCKER_IP
 
-export DUMB_INIT_SETSID=0
-
 case "$1" in
     haproxy)
         haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -D
@@ -74,4 +72,4 @@ export PATRONI_SUPERUSER_SSLKEY="${PATRONI_SUPERUSER_SSLKEY:-$PGSSLKEY}"
 export PATRONI_SUPERUSER_SSLCERT="${PATRONI_SUPERUSER_SSLCERT:-$PGSSLCERT}"
 export PATRONI_SUPERUSER_SSLROOTCERT="${PATRONI_SUPERUSER_SSLROOTCERT:-$PGSSLROOTCERT}"
 
-exec dumb-init python3 /patroni.py postgres0.yml
+exec python3 /patroni.py postgres0.yml

docs/ENVIRONMENT.rst

@@ -14,18 +14,10 @@ Global/Universal
 
 Log
 ---
--  **PATRONI\_LOG\_TYPE**: sets the format of logs. Can be either **plain** or **json**. To use **json** format, you must have the :ref:`jsonlogger <extras>` installed. The default value is **plain**.
 -  **PATRONI\_LOG\_LEVEL**: sets the general logging level. Default value is **INFO** (see `the docs for Python logging <https://docs.python.org/3.6/library/logging.html#levels>`_)
 -  **PATRONI\_LOG\_TRACEBACK\_LEVEL**: sets the level where tracebacks will be visible. Default value is **ERROR**. Set it to **DEBUG** if you want to see tracebacks only if you enable **PATRONI\_LOG\_LEVEL=DEBUG**.
--  **PATRONI\_LOG\_FORMAT**: sets the log formatting string. If the log type is **plain**, the log format should be a string.
+-  **PATRONI\_LOG\_FORMAT**: sets the log formatting string. Default value is **%(asctime)s %(levelname)s: %(message)s** (see `the LogRecord attributes <https://docs.python.org/3.6/library/logging.html#logrecord-attributes>`_)
-   Refer to `the LogRecord attributes <https://docs.python.org/3.6/library/logging.html#logrecord-attributes>`_ for
-   available attributes. If the log type is **json**, the log format can be a list in addition to a string. Each list
-   item should correspond to LogRecord attributes. Be cautious that only the field name is required, and the **%(**
-   and **)** should be omitted. If you wish to print a log field with a different key name, use a dictionary where
-   the dictionary key is the log field, and the value is the name of the field you want to be printed in the log.
-   Default value is **%(asctime)s %(levelname)s: %(message)s**
 -  **PATRONI\_LOG\_DATEFORMAT**: sets the datetime formatting string. (see the `formatTime() documentation <https://docs.python.org/3.6/library/logging.html#logging.Formatter.formatTime>`_)
--  **PATRONI\_LOG\_STATIC\_FIELDS**: add additional fields to the log. This option is only available when the log type is set to **json**. Example ``PATRONI_LOG_STATIC_FIELDS="{app: patroni}"``
 -  **PATRONI\_LOG\_MAX\_QUEUE\_SIZE**: Patroni is using two-step logging. Log records are written into the in-memory queue and there is a separate thread which pulls them from the queue and writes to stderr or file. The maximum size of the internal queue is limited by default by **1000** records, which is enough to keep logs for the past 1h20m.
 -  **PATRONI\_LOG\_DIR**: Directory to write application logs to. The directory must exist and be writable by the user executing Patroni. If you set this env variable, the application will retain 4 25MB logs by default. You can tune those retention values with `PATRONI_LOG_FILE_NUM` and `PATRONI_LOG_FILE_SIZE` (see below).
 -  **PATRONI\_LOG\_FILE\_NUM**: The number of application logs to retain.
@@ -93,7 +85,6 @@ ZooKeeper
 -  **PATRONI\_ZOOKEEPER\_KEY\_PASSWORD**: (optional) The client key password.
 -  **PATRONI\_ZOOKEEPER\_VERIFY**: (optional) Whether to verify certificate or not. Defaults to ``true``.
 -  **PATRONI\_ZOOKEEPER\_SET\_ACLS**: (optional) If set, configure Kazoo to apply a default ACL to each ZNode that it creates. ACLs will assume 'x509' schema and should be specified as a dictionary with the principal as the key and one or more permissions as a list in the value.  Permissions may be one of ``CREATE``, ``READ``, ``WRITE``, ``DELETE`` or ``ADMIN``.  For example, ``set_acls: {CN=principal1: [CREATE, READ], CN=principal2: [ALL]}``.
--  **PATRONI\_ZOOKEEPER\_AUTH\_DATA**: (optional) Authentication credentials to use for the connection. Should be a dictionary in the form that `scheme` is the key and `credential` is the value. Defaults to empty dictionary.
 
 .. note::
     It is required to install ``kazoo>=2.6.0`` to support SSL.

docs/installation.rst

@@ -60,8 +60,6 @@ raft
     `pysyncobj` module in order to use python Raft implementation as DCS
 aws
     `boto3` in order to use AWS callbacks
-jsonlogger
-    `python-json-logger` module in order to enable :ref:`logging <log_settings>` in json format
 all
     all of the above (except psycopg family)
 psycopg

docs/releases.rst

@@ -3,56 +3,6 @@
 Release notes
 =============
 
-Version 3.2.2
--------------
-
-**Bugfixes**
-
-- Don't let replica restore initialize key when DCS was wiped (Alexander Kukushkin)
-
-  It was happening in the method where Patroni was supposed to take over a standalone PG cluster.
-
-- Use consistent read when fetching just updated sync key from Consul (Alexander Kukushkin)
-
-  Consul doesn't provide any interface to immediately get ``ModifyIndex`` for the key that we just updated, therefore we have to perform an explicit read operation. Since stale reads are allowed by default, we sometimes used to get an outdated version of the key.
-
-- Reload Postgres config if a parameter that requires restart was reset to the original value (Polina Bungina)
-
-  Previously Patroni wasn't updating the config, but only resetting the ``pending_restart``.
-
-- Fix erroneous inverted logic of the confirmation prompt message when doing a failover to an async candidate in synchronous mode (Polina Bungina)
-
-  The problem existed only in ``patronictl``.
-
-- Exclude leader from failover candidates in ``patronictl`` (Polina Bungina)
-
-  If the cluster is healthy, failing over to an existing leader is no-op.
-
-- Create Citus database and extension idempotently (Alexander Kukushkin, Zhao Junwang)
-
-  It will allow to create them in the ``post_bootstrap`` script in case if there is a need to add some more dependencies to the Citus database.
-
-- Don't filter our contradictory ``nofailover`` tag (Polina Bungina)
-
-  The configuration ``{nofailover: false, failover_priority: 0}`` set on a node didn't allow it to participate in the race, while it should, because ``nofailover`` tag should take precedence.
-
-- Fixed PyInstaller frozen issue (Sophia Ruan)
-
-  The ``freeze_support()`` was called after ``argparse`` and as a result, Patroni wasn't able to start Postgres.
-
-- Fixed bug in the config generator for ``patronictl`` and ``Citus`` configuration (Israel Barth Rubio)
-
-  It prevented ``patronictl`` and ``Citus`` configuration parameters set via environment variables from being written into the generated config.
-
-- Restore recovery GUCs and some Patroni-managed parameters when joining a running standby (Alexander Kukushkin)
-
-  Patroni was failing to restart Postgres v12 onwards with an error about missing ``port`` in one of the internal structures.
-
-- Fixes around ``pending_restart`` flag (Polina Bungina)
-
-  Don't expose ``pending_restart`` when in custom bootstrap with ``recovery_target_action = promote`` or when someone changed ``hot_standby`` or ``wal_log_hints`` using for example ``ALTER SYSTEM``.
-
-
 Version 3.2.1
 -------------
 

docs/replica_bootstrap.rst

@@ -71,22 +71,6 @@ Makes the configured ``command`` to be called additionally with ``--arg1=value1
 
  .. note:: Bootstrap methods are neither chained, nor fallen-back to the default one in case the primary one fails
 
-As an example, you are able to bootstrap a fresh Patroni cluster from a Barman backup with a configuration like this:
-
-.. code:: YAML
-
-    bootstrap:
-        method: barman
-        barman:
-            keep_existing_recovery_conf: true
-            command: patroni_barman_recover
-            api-url: https://barman-host:7480
-            barman-server: my_server
-            ssh-command: ssh postgres@patroni-host
-
-.. note::
-    ``patroni_barman_recover`` requires that you have both Barman and ``pg-backup-api`` configured in the Barman host, so it can execute a remote ``barman recover`` through the backup API.
-    The above example uses a subset of the available parameters. You can get more information running ``patroni_barman_recover --help``.
 
 .. _custom_replica_creation:
 
@@ -141,25 +125,6 @@ example: pgbackrest
         basebackup:
             max-rate: '100M'
 
-example: Barman
-
-.. code:: YAML
-
-    postgresql:
-        create_replica_methods:
-            - barman
-            - basebackup
-        barman:
-            command: patroni_barman_recover
-            api-url: https://barman-host:7480
-            barman-server: my_server
-            ssh-command: ssh postgres@patroni-host
-        basebackup:
-            max-rate: '100M'
-
-.. note::
-    ``patroni_barman_recover`` requires that you have both Barman and ``pg-backup-api`` configured in the Barman host, so it can execute a remote ``barman recover`` through the backup API.
-    The above example uses a subset of the available parameters. You can get more information running ``patroni_barman_recover --help``.
 
 The ``create_replica_methods`` defines available replica creation methods and the order of executing them. Patroni will
 stop on the first one that returns 0. Each method should define a separate section in the configuration file, listing the command

docs/yaml_configuration.rst

@@ -11,22 +11,12 @@ Global/Universal
 -  **namespace**: path within the configuration store where Patroni will keep information about the cluster. Default value: "/service"
 -  **scope**: cluster name
 
-.. _log_settings:
-
 Log
 ---
--  **type**: sets the format of logs. Can be either **plain** or **json**. To use **json** format, you must have the :ref:`jsonlogger <extras>` installed. The default value is **plain**.
 -  **level**: sets the general logging level. Default value is **INFO** (see `the docs for Python logging <https://docs.python.org/3.6/library/logging.html#levels>`_)
 -  **traceback\_level**: sets the level where tracebacks will be visible. Default value is **ERROR**. Set it to **DEBUG** if you want to see tracebacks only if you enable **log.level=DEBUG**.
--  **format**: sets the log formatting string. If the log type is **plain**, the log format should be a string. Refer to
+-  **format**: sets the log formatting string. Default value is **%(asctime)s %(levelname)s: %(message)s** (see `the LogRecord attributes <https://docs.python.org/3.6/library/logging.html#logrecord-attributes>`_)
-   `the LogRecord attributes <https://docs.python.org/3.6/library/logging.html#logrecord-attributes>`_ for
-   available attributes. If the log type is **json**, the log format can be a list in addition to a string. Each list
-   item should correspond to LogRecord attributes. Be cautious that only the field name is required, and the **%(**
-   and **)** should be omitted. If you wish to print a log field with a different key name, use a dictionary where
-   the dictionary key is the log field, and the value is the name of the field you want to be printed in the log.
-   Default value is **%(asctime)s %(levelname)s: %(message)s**
 -  **dateformat**: sets the datetime formatting string. (see the `formatTime() documentation <https://docs.python.org/3.6/library/logging.html#logging.Formatter.formatTime>`_)
--  **static_fields**: add additional fields to the log. This option is only available when the log type is set to **json**.
 -  **max\_queue\_size**: Patroni is using two-step logging. Log records are written into the in-memory queue and there is a separate thread which pulls them from the queue and writes to stderr or file. The maximum size of the internal queue is limited by default by **1000** records, which is enough to keep logs for the past 1h20m.
 -  **dir**: Directory to write application logs to. The directory must exist and be writable by the user executing Patroni. If you set this value, the application will retain 4 25MB logs by default. You can tune those retention values with `file_num` and `file_size` (see below).
 -  **file\_num**: The number of application logs to retain.
@@ -36,20 +26,6 @@ Log
    -  **patroni.postmaster: WARNING**
    -  **urllib3: DEBUG**
 
-Here is an example of how to config patroni to log in json format.
-
-.. code:: YAML
-
-   log:
-      type: json
-      format:
-         - message
-         - module
-         - asctime: '@timestamp'
-         - levelname: level
-      static_fields:
-         app: patroni
-
 .. _bootstrap_settings:
 
 Bootstrap configuration
@@ -157,7 +133,6 @@ ZooKeeper
 -  **key_password**: (optional) The client key password.
 -  **verify**: (optional) Whether to verify certificate or not. Defaults to ``true``.
 -  **set_acls**: (optional) If set, configure Kazoo to apply a default ACL to each ZNode that it creates. ACLs will assume 'x509' schema and should be specified as a dictionary with the principal as the key and one or more permissions as a list in the value.  Permissions may be one of ``CREATE``, ``READ``, ``WRITE``, ``DELETE`` or ``ADMIN``.  For example, ``set_acls: {CN=principal1: [CREATE, READ], CN=principal2: [ALL]}``.
--  **auth_data**: (optional) Authentication credentials to use for the connection. Should be a dictionary in the form that `scheme` is the key and `credential` is the value. Defaults to empty dictionary.
 
 .. note::
     It is required to install ``kazoo>=2.6.0`` to support SSL.

features/priority_failover.feature

@@ -6,9 +6,10 @@ Feature: priority replication
     And I configure and start postgres1 with a tag failover_priority 0
     Then replication works from postgres0 to postgres1 after 20 seconds
     When I shut down postgres0
-    And there is one of ["following a different leader because I am not allowed to promote"] INFO in the postgres1 patroni log after 5 seconds
+    And I sleep for 5 seconds
     Then postgres1 role is the secondary after 10 seconds
-    When I start postgres0
+    And there is one of ["following a different leader because I am not allowed to promote"] INFO in the postgres1 patroni log after 5 seconds
+    Given I start postgres0
     Then postgres0 role is the primary after 10 seconds
 
   Scenario: check higher failover priority is respected
@@ -17,23 +18,6 @@ Feature: priority replication
     Then replication works from postgres0 to postgres2 after 20 seconds
     And replication works from postgres0 to postgres3 after 20 seconds
     When I shut down postgres0
+    And I sleep for 5 seconds
     Then postgres3 role is the primary after 10 seconds
     And there is one of ["postgres3 has equally tolerable WAL position and priority 2, while this node has priority 1","Wal position of postgres3 is ahead of my wal position"] INFO in the postgres2 patroni log after 5 seconds
-
- Scenario: check conflicting configuration handling
-    When I set nofailover tag in postgres2 config
-    And I issue an empty POST request to http://127.0.0.1:8010/reload
-    Then I receive a response code 202
-    And there is one of ["Conflicting configuration between nofailover: True and failover_priority: 1. Defaulting to nofailover: True"] WARNING in the postgres2 patroni log after 5 seconds
-    And "members/postgres2" key in DCS has tags={'failover_priority': '1', 'nofailover': True} after 10 seconds
-    When I issue a POST request to http://127.0.0.1:8010/failover with {"candidate": "postgres2"}
-    Then I receive a response code 412
-    And I receive a response text "failover is not possible: no good candidates have been found"
-    When I reset nofailover tag in postgres1 config
-    And I issue an empty POST request to http://127.0.0.1:8009/reload
-    Then I receive a response code 202
-    And there is one of ["Conflicting configuration between nofailover: False and failover_priority: 0. Defaulting to nofailover: False"] WARNING in the postgres1 patroni log after 5 seconds
-    And "members/postgres1" key in DCS has tags={'failover_priority': '0', 'nofailover': False} after 10 seconds
-    And I issue a POST request to http://127.0.0.1:8009/failover with {"candidate": "postgres1"}
-    Then I receive a response code 200
-    And postgres1 role is the primary after 10 seconds

features/steps/basic_replication.py

@@ -114,7 +114,7 @@ def replication_works(context, primary, replica, time_limit):
     """.format(str(time()).replace('.', '_').replace(',', '_'), primary, replica, time_limit))
 
 
-@step('there is one of {message_list} {level:w} in the {node} patroni log after {timeout:d} seconds')
+@then('there is one of {message_list} {level:w} in the {node} patroni log after {timeout:d} seconds')
 def check_patroni_log(context, message_list, level, node, timeout):
     timeout *= context.timeout_multiplier
     message_list = json.loads(message_list)
@@ -123,6 +123,6 @@ def check_patroni_log(context, message_list, level, node, timeout):
         messsages_of_level = context.pctl.read_patroni_log(node, level)
         if any(any(message in line for line in messsages_of_level) for message in message_list):
             break
-        sleep(1)
+        time.sleep(1)
     else:
         assert False, f"There were none of {message_list} {level} in the {node} patroni log after {timeout} seconds"

features/steps/patroni_api.py

@@ -128,12 +128,6 @@ def scheduled_restart(context, url, in_seconds, data):
     context.execute_steps(u"""Given I issue a POST request to {0}/restart with {1}""".format(url, json.dumps(data)))
 
 
-@step('I {action:w} {tag:w} tag in {pg_name:w} config')
-def add_bool_tag_to_config(context, action, tag, pg_name):
-    value = action == 'set'
-    context.pctl.add_tag_to_config(pg_name, tag, value)
-
-
 @step('I add tag {tag:w} {value:w} to {pg_name:w} config')
 def add_tag_to_config(context, tag, value, pg_name):
     context.pctl.add_tag_to_config(pg_name, tag, value)

kubernetes/Dockerfile

@@ -1,4 +1,4 @@
-FROM postgres:16
+FROM postgres:15
 LABEL maintainer="Alexander Kukushkin <[email protected]>"
 
 RUN export DEBIAN_FRONTEND=noninteractive \

kubernetes/Dockerfile.citus

@@ -1,4 +1,4 @@
-FROM postgres:16
+FROM postgres:15
 LABEL maintainer="Alexander Kukushkin <[email protected]>"
 
 RUN export DEBIAN_FRONTEND=noninteractive \
@@ -11,7 +11,7 @@ RUN export DEBIAN_FRONTEND=noninteractive \
     ## Make sure we have a en_US.UTF-8 locale available
     && localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8 \
     && if [ $(dpkg --print-architecture) = 'arm64' ]; then \
-        apt-get install -y postgresql-server-dev-16 \
+        apt-get install -y postgresql-server-dev-15 \
                            gcc make autoconf \
                            libc6-dev flex libcurl4-gnutls-dev \
                            libicu-dev libkrb5-dev liblz4-dev \
@@ -24,7 +24,7 @@ RUN export DEBIAN_FRONTEND=noninteractive \
         echo "deb [signed-by=/etc/apt/trusted.gpg.d/citusdata_community.gpg] https://packagecloud.io/citusdata/community/debian/ $(lsb_release -cs) main" > /etc/apt/sources.list.d/citusdata_community.list \
         && curl -sL https://packagecloud.io/citusdata/community/gpgkey | gpg --dearmor > /etc/apt/trusted.gpg.d/citusdata_community.gpg \
         && apt-get update -y \
-        && apt-get -y install postgresql-16-citus-12.1; \
+        && apt-get -y install postgresql-15-citus-12.0; \
     fi \
     && pip3 install --break-system-packages setuptools \
     && pip3 install --break-system-packages 'git+https://github.com/zalando/patroni.git#egg=patroni[kubernetes]' \
@@ -38,7 +38,7 @@ RUN export DEBIAN_FRONTEND=noninteractive \
     && chmod 664 /etc/passwd \
     # Clean up
     && apt-get remove -y git python3-pip python3-wheel \
-               postgresql-server-dev-16 gcc make autoconf \
+               postgresql-server-dev-15 gcc make autoconf \
                libc6-dev flex libicu-dev libkrb5-dev liblz4-dev \
                libpam0g-dev libreadline-dev libselinux1-dev libssl-dev libxslt1-dev libzstd-dev uuid-dev \
     && apt-get autoremove -y \

patroni/__main__.py

@@ -68,7 +68,7 @@ class Patroni(AbstractPatroniDaemon, Tags):
         self.watchdog = Watchdog(self.config)
         self.load_dynamic_configuration()
 
-        self.postgresql = Postgresql(self.config['postgresql'], self.dcs.mpp)
+        self.postgresql = Postgresql(self.config['postgresql'])
         self.api = RestApiServer(self, self.config['restapi'])
         self.ha = Ha(self)
 
@@ -229,6 +229,11 @@ def patroni_main(configfile: str) -> None:
 
     :param configfile: path to Patroni configuration file.
     """
+    from multiprocessing import freeze_support
+
+    # Windows executables created by PyInstaller are frozen, thus we need to enable frozen support for
+    # :mod:`multiprocessing` to avoid :class:`RuntimeError` exceptions.
+    freeze_support()
     abstract_main(Patroni, configfile)
 
 
@@ -330,12 +335,6 @@ def main() -> None:
         ``patroni`` daemon as another process. In that case relevant signals received by the main process and forwarded
         to ``patroni`` daemon process.
     """
-    from multiprocessing import freeze_support
-
-    # Executables created by PyInstaller are frozen, thus we need to enable frozen support for
-    # :mod:`multiprocessing` to avoid :class:`RuntimeError` exceptions.
-    freeze_support()
-
     check_psycopg()
 
     args = process_arguments()

patroni/api.py

@@ -26,7 +26,7 @@ from urllib.parse import urlparse, parse_qs
 
 from typing import Any, Callable, Dict, Iterator, List, Optional, Tuple, TYPE_CHECKING, Union
 
-from . import global_config, psycopg
+from . import psycopg
 from .__main__ import Patroni
 from .dcs import Cluster
 from .exceptions import PostgresConnectionException, PostgresException
@@ -180,8 +180,6 @@ class RestApiHandler(BaseHTTPRequestHandler):
             * ``tags``: tags that were set through Patroni configuration merged with dynamically applied tags;
             * ``database_system_identifier``: ``Database system identifier`` from ``pg_controldata`` output;
             * ``pending_restart``: ``True`` if PostgreSQL is pending to be restarted;
-            * ``pending_restart_reason``: dictionary where each key is the parameter that caused "pending restart" flag
-                to be set and the value is a dictionary with the old and the new value.
             * ``scheduled_restart``: a dictionary with a single key ``schedule``, which is the timestamp for the
                 scheduled restart;
             * ``watchdog_failed``: ``True`` if watchdog device is unhealthy;
@@ -198,9 +196,8 @@ class RestApiHandler(BaseHTTPRequestHandler):
             response['tags'] = tags
         if patroni.postgresql.sysid:
             response['database_system_identifier'] = patroni.postgresql.sysid
-        if patroni.postgresql.pending_restart_reason:
+        if patroni.postgresql.pending_restart:
             response['pending_restart'] = True
-            response['pending_restart_reason'] = dict(patroni.postgresql.pending_restart_reason)
         response['patroni'] = {
             'version': patroni.version,
             'scope': patroni.postgresql.scope,
@@ -293,7 +290,7 @@ class RestApiHandler(BaseHTTPRequestHandler):
 
         patroni = self.server.patroni
         cluster = patroni.dcs.cluster
-        config = global_config.from_cluster(cluster)
+        global_config = patroni.config.get_global_config(cluster)
 
         leader_optime = cluster and cluster.last_lsn or 0
         replayed_location = response.get('xlog', {}).get('replayed_location', 0)
@@ -311,7 +308,7 @@ class RestApiHandler(BaseHTTPRequestHandler):
             standby_leader_status_code = 200 if response.get('role') == 'standby_leader' else 503
         elif patroni.ha.is_leader():
             leader_status_code = 200
-            if config.is_standby_cluster:
+            if global_config.is_standby_cluster:
                 primary_status_code = replica_status_code = 503
                 standby_leader_status_code = 200 if response.get('role') in ('replica', 'standby_leader') else 503
             else:
@@ -455,8 +452,9 @@ class RestApiHandler(BaseHTTPRequestHandler):
         HTTP status ``200`` and the JSON representation of the cluster topology.
         """
         cluster = self.server.patroni.dcs.get_cluster()
+        global_config = self.server.patroni.config.get_global_config(cluster)
 
-        response = cluster_as_json(cluster)
+        response = cluster_as_json(cluster, global_config)
         response['scope'] = self.server.patroni.postgresql.scope
         self._write_json_response(200, response)
 
@@ -637,7 +635,7 @@ class RestApiHandler(BaseHTTPRequestHandler):
         metrics.append("# HELP patroni_pending_restart Value is 1 if the node needs a restart, 0 otherwise.")
         metrics.append("# TYPE patroni_pending_restart gauge")
         metrics.append("patroni_pending_restart{0} {1}"
-                       .format(labels, int(bool(patroni.postgresql.pending_restart_reason))))
+                       .format(labels, int(patroni.postgresql.pending_restart)))
 
         metrics.append("# HELP patroni_is_paused Value is 1 if auto failover is disabled, 0 otherwise.")
         metrics.append("# TYPE patroni_is_paused gauge")
@@ -866,7 +864,7 @@ class RestApiHandler(BaseHTTPRequestHandler):
         if request:
             logger.debug("received restart request: {0}".format(request))
 
-        if global_config.from_cluster(cluster).is_paused and 'schedule' in request:
+        if self.server.patroni.config.get_global_config(cluster).is_paused and 'schedule' in request:
             self.write_response(status_code, "Can't schedule restart in the paused state")
             return
 
@@ -1035,7 +1033,7 @@ class RestApiHandler(BaseHTTPRequestHandler):
 
         :returns: a string with the error message or ``None`` if good nodes are found.
         """
-        is_synchronous_mode = global_config.from_cluster(cluster).is_synchronous_mode
+        is_synchronous_mode = self.server.patroni.config.get_global_config(cluster).is_synchronous_mode
         if leader and (not cluster.leader or cluster.leader.name != leader):
             return 'leader name does not match'
         if candidate:
@@ -1093,7 +1091,7 @@ class RestApiHandler(BaseHTTPRequestHandler):
         candidate = request.get('candidate') or request.get('member')
         scheduled_at = request.get('scheduled_at')
         cluster = self.server.patroni.dcs.get_cluster()
-        config = global_config.from_cluster(cluster)
+        global_config = self.server.patroni.config.get_global_config(cluster)
 
         logger.info("received %s request with leader=%s candidate=%s scheduled_at=%s",
                     action, leader, candidate, scheduled_at)
@@ -1106,12 +1104,12 @@ class RestApiHandler(BaseHTTPRequestHandler):
         if not data and scheduled_at:
             if action == 'failover':
                 data = "Failover can't be scheduled"
-            elif config.is_paused:
+            elif global_config.is_paused:
                 data = "Can't schedule switchover in the paused state"
             else:
                 (status_code, data, scheduled_at) = self.parse_schedule(scheduled_at, action)
 
-        if not data and config.is_paused and not candidate:
+        if not data and global_config.is_paused and not candidate:
             data = 'Switchover is possible only to a specific candidate in a paused state'
 
         if action == 'failover' and leader:
@@ -1156,16 +1154,8 @@ class RestApiHandler(BaseHTTPRequestHandler):
     def do_POST_citus(self) -> None:
         """Handle a ``POST`` request to ``/citus`` path.
 
-        .. note::
+        Call :func:`~patroni.postgresql.CitusHandler.handle_event` to handle the request, then write a response with
-            We keep this entrypoint for backward compatibility and simply dispatch the request to :meth:`do_POST_mpp`.
+        HTTP status code ``200``.
-        """
-        self.do_POST_mpp()
-
-    def do_POST_mpp(self) -> None:
-        """Handle a ``POST`` request to ``/mpp`` path.
-
-        Call :func:`~patroni.postgresql.mpp.AbstractMPPHandler.handle_event` to handle the request,
-        then write a response with HTTP status code ``200``.
 
         .. note::
             If unable to parse the request body, then the request is silently discarded.
@@ -1175,9 +1165,9 @@ class RestApiHandler(BaseHTTPRequestHandler):
             return
 
         patroni = self.server.patroni
-        if patroni.postgresql.mpp_handler.is_coordinator() and patroni.ha.is_leader():
+        if patroni.postgresql.citus_handler.is_coordinator() and patroni.ha.is_leader():
             cluster = patroni.dcs.get_cluster()
-            patroni.postgresql.mpp_handler.handle_event(cluster, request)
+            patroni.postgresql.citus_handler.handle_event(cluster, request)
         self.write_response(200, 'OK')
 
     def parse_request(self) -> bool:
@@ -1270,7 +1260,7 @@ class RestApiHandler(BaseHTTPRequestHandler):
         """
         postgresql = self.server.patroni.postgresql
         cluster = self.server.patroni.dcs.cluster
-        config = global_config.from_cluster(cluster)
+        global_config = self.server.patroni.config.get_global_config(cluster)
         try:
 
             if postgresql.state not in ('running', 'restarting', 'starting'):
@@ -1301,10 +1291,10 @@ class RestApiHandler(BaseHTTPRequestHandler):
                 })
             }
 
-            if result['role'] == 'replica' and config.is_standby_cluster:
+            if result['role'] == 'replica' and global_config.is_standby_cluster:
                 result['role'] = postgresql.role
 
-            if result['role'] == 'replica' and config.is_synchronous_mode\
+            if result['role'] == 'replica' and global_config.is_synchronous_mode\
                     and cluster and cluster.sync.matches(postgresql.name):
                 result['sync_standby'] = True
 
@@ -1329,7 +1319,7 @@ class RestApiHandler(BaseHTTPRequestHandler):
                 state = 'unknown'
             result: Dict[str, Any] = {'state': state, 'role': postgresql.role}
 
-        if config.is_paused:
+        if global_config.is_paused:
             result['pause'] = True
         if not cluster or cluster.is_unlocked():
             result['cluster_unlocked'] = True

patroni/config.py

@@ -1,5 +1,4 @@
 """Facilities related to Patroni configuration."""
-import re
 import json
 import logging
 import os
@@ -13,7 +12,7 @@ from typing import Any, Callable, Collection, Dict, List, Optional, Union, TYPE_
 
 from . import PATRONI_ENV_PREFIX
 from .collections import CaseInsensitiveDict
-from .dcs import ClusterConfig
+from .dcs import ClusterConfig, Cluster
 from .exceptions import ConfigParseError
 from .file_perm import pg_perm
 from .postgresql.config import ConfigHandler
@@ -55,6 +54,154 @@ def default_validator(conf: Dict[str, Any]) -> List[str]:
     return []
 
 
+class GlobalConfig(object):
+    """A class that wraps global configuration and provides convenient methods to access/check values.
+
+    It is instantiated either by calling :func:`get_global_config` or :meth:`Config.get_global_config`, which picks
+    either a configuration from provided :class:`Cluster` object (the most up-to-date) or from the
+    local cache if :class:`ClusterConfig` is not initialized or doesn't have a valid config.
+    """
+
+    def __init__(self, config: Dict[str, Any]) -> None:
+        """Initialize :class:`GlobalConfig` object with given *config*.
+
+        :param config: current configuration either from
+                       :class:`ClusterConfig` or from :func:`Config.dynamic_configuration`.
+        """
+        self.__config = config
+
+    def get(self, name: str) -> Any:
+        """Gets global configuration value by *name*.
+
+        :param name: parameter name.
+
+        :returns: configuration value or ``None`` if it is missing.
+        """
+        return self.__config.get(name)
+
+    def check_mode(self, mode: str) -> bool:
+        """Checks whether the certain parameter is enabled.
+
+        :param mode: parameter name, e.g. ``synchronous_mode``, ``failsafe_mode``, ``pause``, ``check_timeline``, and
+            so on.
+
+        :returns: ``True`` if parameter *mode* is enabled in the global configuration.
+        """
+        return bool(parse_bool(self.__config.get(mode)))
+
+    @property
+    def is_paused(self) -> bool:
+        """``True`` if cluster is in maintenance mode."""
+        return self.check_mode('pause')
+
+    @property
+    def is_synchronous_mode(self) -> bool:
+        """``True`` if synchronous replication is requested and it is not a standby cluster config."""
+        return self.check_mode('synchronous_mode') and not self.is_standby_cluster
+
+    @property
+    def is_synchronous_mode_strict(self) -> bool:
+        """``True`` if at least one synchronous node is required."""
+        return self.check_mode('synchronous_mode_strict')
+
+    def get_standby_cluster_config(self) -> Union[Dict[str, Any], Any]:
+        """Get ``standby_cluster`` configuration.
+
+        :returns: a copy of ``standby_cluster`` configuration.
+        """
+        return deepcopy(self.get('standby_cluster'))
+
+    @property
+    def is_standby_cluster(self) -> bool:
+        """``True`` if global configuration has a valid ``standby_cluster`` section."""
+        config = self.get_standby_cluster_config()
+        return isinstance(config, dict) and\
+            bool(config.get('host') or config.get('port') or config.get('restore_command'))
+
+    def get_int(self, name: str, default: int = 0) -> int:
+        """Gets current value of *name* from the global configuration and try to return it as :class:`int`.
+
+        :param name: name of the parameter.
+        :param default: default value if *name* is not in the configuration or invalid.
+
+        :returns: currently configured value of *name* from the global configuration or *default* if it is not set or
+            invalid.
+        """
+        ret = parse_int(self.get(name))
+        return default if ret is None else ret
+
+    @property
+    def min_synchronous_nodes(self) -> int:
+        """The minimal number of synchronous nodes based on whether ``synchronous_mode_strict`` is enabled or not."""
+        return 1 if self.is_synchronous_mode_strict else 0
+
+    @property
+    def synchronous_node_count(self) -> int:
+        """Currently configured value of ``synchronous_node_count`` from the global configuration.
+
+        Assume ``1`` if it is not set or invalid.
+        """
+        return max(self.get_int('synchronous_node_count', 1), self.min_synchronous_nodes)
+
+    @property
+    def maximum_lag_on_failover(self) -> int:
+        """Currently configured value of ``maximum_lag_on_failover`` from the global configuration.
+
+        Assume ``1048576`` if it is not set or invalid.
+        """
+        return self.get_int('maximum_lag_on_failover', 1048576)
+
+    @property
+    def maximum_lag_on_syncnode(self) -> int:
+        """Currently configured value of ``maximum_lag_on_syncnode`` from the global configuration.
+
+        Assume ``-1`` if it is not set or invalid.
+        """
+        return self.get_int('maximum_lag_on_syncnode', -1)
+
+    @property
+    def primary_start_timeout(self) -> int:
+        """Currently configured value of ``primary_start_timeout`` from the global configuration.
+
+        Assume ``300`` if it is not set or invalid.
+
+        .. note::
+            ``master_start_timeout`` is still supported to keep backward compatibility.
+        """
+        default = 300
+        return self.get_int('primary_start_timeout', default)\
+            if 'primary_start_timeout' in self.__config else self.get_int('master_start_timeout', default)
+
+    @property
+    def primary_stop_timeout(self) -> int:
+        """Currently configured value of ``primary_stop_timeout`` from the global configuration.
+
+        Assume ``0`` if it is not set or invalid.
+
+        .. note::
+            ``master_stop_timeout`` is still supported to keep backward compatibility.
+        """
+        default = 0
+        return self.get_int('primary_stop_timeout', default)\
+            if 'primary_stop_timeout' in self.__config else self.get_int('master_stop_timeout', default)
+
+
+def get_global_config(cluster: Optional[Cluster], default: Optional[Dict[str, Any]] = None) -> GlobalConfig:
+    """Instantiates :class:`GlobalConfig` based on the input.
+
+    :param cluster: the currently known cluster state from DCS.
+    :param default: default configuration, which will be used if there is no valid *cluster.config*.
+
+    :returns: :class:`GlobalConfig` object.
+    """
+    # Try to protect from the case when DCS was wiped out
+    if cluster and cluster.config and cluster.config.modify_version:
+        config = cluster.config.data
+    else:
+        config = default or {}
+    return GlobalConfig(deepcopy(config))
+
+
 class Config(object):
     """Handle Patroni configuration.
 
@@ -143,10 +290,10 @@ class Config(object):
         self.__effective_configuration = self._build_effective_configuration({}, self._local_configuration)
         self._data_dir = self.__effective_configuration.get('postgresql', {}).get('data_dir', "")
         self._cache_file = os.path.join(self._data_dir, self.__CACHE_FILENAME)
-        if validator:  # patronictl uses validator=None
+        if validator:  # patronictl uses validator=None and we don't want to load anything from local cache in this case
-            self._load_cache()  # we don't want to load anything from local cache for ctl
+            self._load_cache()
-            self._validate_failover_tags()  # irrelevant for ctl
         self._cache_needs_saving = False
+        self._validate_failover_tags()
 
     @property
     def config_file(self) -> Optional[str]:
@@ -357,7 +504,6 @@ class Config(object):
                     new_configuration = self._build_effective_configuration(self._dynamic_configuration, configuration)
                     self._local_configuration = configuration
                     self.__effective_configuration = new_configuration
-                    self._validate_failover_tags()
                     return True
                 else:
                     logger.info('No local configuration items changed.')
@@ -535,8 +681,8 @@ class Config(object):
         _set_section_values('ctl', ['insecure', 'cacert', 'certfile', 'keyfile', 'keyfile_password'])
         _set_section_values('postgresql', ['listen', 'connect_address', 'proxy_address',
                                            'config_dir', 'data_dir', 'pgpass', 'bin_dir'])
-        _set_section_values('log', ['type', 'level', 'traceback_level', 'format', 'dateformat', 'static_fields',
+        _set_section_values('log', ['level', 'traceback_level', 'format', 'dateformat', 'max_queue_size',
-                                    'max_queue_size', 'dir', 'file_size', 'file_num', 'loggers'])
+                                    'dir', 'file_size', 'file_num', 'loggers'])
         _set_section_values('raft', ['data_dir', 'self_addr', 'partner_addrs', 'password', 'bind_addr'])
 
         for binary in ('pg_ctl', 'initdb', 'pg_controldata', 'pg_basebackup', 'postgres', 'pg_isready', 'pg_rewind'):
@@ -583,12 +729,6 @@ class Config(object):
                 if value:
                     ret[first][second] = value
 
-        logformat = ret.get('log', {}).get('format')
-        if logformat and not re.search(r'%\(\w+\)', logformat):
-            logformat = _parse_list(logformat)
-            if logformat:
-                ret['log']['format'] = logformat
-
         def _parse_dict(value: str) -> Optional[Dict[str, Any]]:
             """Parse an YAML dictionary *value* as a :class:`dict`.
 
@@ -604,12 +744,7 @@ class Config(object):
                 logger.exception('Exception when parsing dict %s', value)
                 return None
 
-        dict_configs = (
+        for first, params in (('restapi', ('http_extra_headers', 'https_extra_headers')), ('log', ('loggers',))):
-            ('restapi', ('http_extra_headers', 'https_extra_headers')),
-            ('log', ('static_fields', 'loggers'))
-        )
-
-        for first, params in dict_configs:
             for second in params:
                 value = ret.get(first, {}).pop(second, None)
                 if value:
@@ -656,7 +791,7 @@ class Config(object):
                               'SERVICE_TAGS', 'NAMESPACE', 'CONTEXT', 'USE_ENDPOINTS', 'SCOPE_LABEL', 'ROLE_LABEL',
                               'POD_IP', 'PORTS', 'LABELS', 'BYPASS_API_SERVICE', 'RETRIABLE_HTTP_CODES', 'KEY_PASSWORD',
                               'USE_SSL', 'SET_ACLS', 'GROUP', 'DATABASE', 'LEADER_LABEL_VALUE', 'FOLLOWER_LABEL_VALUE',
-                              'STANDBY_LEADER_LABEL_VALUE', 'TMP_ROLE_LABEL', 'AUTH_DATA') and name:
+                              'STANDBY_LEADER_LABEL_VALUE', 'TMP_ROLE_LABEL') and name:
                     value = os.environ.pop(param)
                     if name == 'CITUS':
                         if suffix == 'GROUP':
@@ -667,7 +802,7 @@ class Config(object):
                         value = value and parse_int(value)
                     elif suffix in ('HOSTS', 'PORTS', 'CHECKS', 'SERVICE_TAGS', 'RETRIABLE_HTTP_CODES'):
                         value = value and _parse_list(value)
-                    elif suffix in ('LABELS', 'SET_ACLS', 'AUTH_DATA'):
+                    elif suffix in ('LABELS', 'SET_ACLS'):
                         value = _parse_dict(value)
                     elif suffix in ('USE_PROXIES', 'REGISTER_SERVICE', 'USE_ENDPOINTS', 'BYPASS_API_SERVICE', 'VERIFY'):
                         value = parse_bool(value)
@@ -814,6 +949,18 @@ class Config(object):
         """
         return deepcopy(self.__effective_configuration)
 
+    def get_global_config(self, cluster: Optional[Cluster]) -> GlobalConfig:
+        """Instantiate :class:`GlobalConfig` based on input.
+
+        Use the configuration from provided *cluster* (the most up-to-date) or from the
+        local cache if *cluster.config* is not initialized or doesn't have a valid config.
+
+        :param cluster: the currently known cluster state from DCS.
+
+        :returns: :class:`GlobalConfig` object.
+        """
+        return get_global_config(cluster, self._dynamic_configuration)
+
     def _validate_failover_tags(self) -> None:
         """Check ``nofailover``/``failover_priority`` config and warn user if it's contradictory.
 
@@ -827,12 +974,10 @@ class Config(object):
           bedrock source of truth)
         """
         tags = self.get('tags', {})
-        if 'nofailover' not in tags:
-            return
         nofailover_tag = tags.get('nofailover')
         failover_priority_tag = parse_int(tags.get('failover_priority'))
         if failover_priority_tag is not None \
-                and (bool(nofailover_tag) is True and failover_priority_tag > 0
+                and (nofailover_tag is True and failover_priority_tag > 0
-                     or bool(nofailover_tag) is False and failover_priority_tag <= 0):
+                     or nofailover_tag is False and failover_priority_tag <= 0):
             logger.warning('Conflicting configuration between nofailover: %s and failover_priority: %s. '
                            'Defaulting to nofailover: %s', nofailover_tag, failover_priority_tag, nofailover_tag)

patroni/config_generator.py

@@ -99,7 +99,6 @@ class AbstractConfigGenerator(abc.ABC):
                 'listen': cls._IP + ':8008'
             },
             'log': {
-                'type': PatroniLogger.DEFAULT_TYPE,
                 'level': PatroniLogger.DEFAULT_LEVEL,
                 'traceback_level': PatroniLogger.DEFAULT_TRACEBACK_LEVEL,
                 'format': PatroniLogger.DEFAULT_FORMAT,
@@ -179,7 +178,7 @@ class AbstractConfigGenerator(abc.ABC):
 
         :yields: formatted lines or blocks that represent a text output of the YAML document.
         """
-        for name in ('scope', 'namespace', 'name', 'log', 'restapi', 'ctl', 'citus',
+        for name in ('scope', 'namespace', 'name', 'log', 'restapi', 'ctl' 'citus',
                      'consul', 'etcd', 'etcd3', 'exhibitor', 'kubernetes', 'raft', 'zookeeper'):
             yield from self._format_config_section(name)
 

patroni/ctl.py

@@ -46,12 +46,10 @@ try:
 except ImportError:  # pragma: no cover
     from cdiff import markup_to_pager, PatchStream  # pyright: ignore [reportMissingModuleSource]
 
-from . import global_config
+from .config import Config, get_global_config
-from .config import Config
 from .dcs import get_dcs as _get_dcs, AbstractDCS, Cluster, Member
 from .exceptions import PatroniException
 from .postgresql.misc import postgres_version_to_int
-from .postgresql.mpp import get_mpp
 from .utils import cluster_as_json, patch_config, polling_loop
 from .request import PatroniRequest
 from .version import __version__
@@ -257,23 +255,15 @@ def load_config(path: str, dcs_url: Optional[str]) -> Dict[str, Any]:
     return config
 
 
-def _get_configuration() -> Dict[str, Any]:
-    """Get configuration object.
-
-    :returns: configuration object from the current context.
-    """
-    return click.get_current_context().obj['__config']
-
-
 option_format = click.option('--format', '-f', 'fmt', help='Output format', default='pretty',
                              type=click.Choice(['pretty', 'tsv', 'json', 'yaml', 'yml']))
 option_watchrefresh = click.option('-w', '--watch', type=float, help='Auto update the screen every X seconds')
 option_watch = click.option('-W', is_flag=True, help='Auto update the screen every 2 seconds')
 option_force = click.option('--force', is_flag=True, help='Do not ask for confirmation at any point')
 arg_cluster_name = click.argument('cluster_name', required=False,
-                                  default=lambda: _get_configuration().get('scope'))
+                                  default=lambda: click.get_current_context().obj.get('scope'))
 option_default_citus_group = click.option('--group', required=False, type=int, help='Citus group',
-                                          default=lambda: _get_configuration().get('citus', {}).get('group'))
+                                          default=lambda: click.get_current_context().obj.get('citus', {}).get('group'))
 option_citus_group = click.option('--group', required=False, type=int, help='Citus group')
 role_choice = click.Choice(['leader', 'primary', 'standby-leader', 'replica', 'standby', 'any', 'master'])
 
@@ -311,23 +301,15 @@ def ctl(ctx: click.Context, config_file: str, dcs_url: Optional[str], insecure:
         level = os.environ.get(name, level)
     logging.basicConfig(format='%(asctime)s - %(levelname)s - %(message)s', level=level)
     logging.captureWarnings(True)  # Capture eventual SSL warning
-    config = load_config(config_file, dcs_url)
+    ctx.obj = load_config(config_file, dcs_url)
     # backward compatibility for configuration file where ctl section is not defined
-    config.setdefault('ctl', {})['insecure'] = config.get('ctl', {}).get('insecure') or insecure
+    ctx.obj.setdefault('ctl', {})['insecure'] = ctx.obj.get('ctl', {}).get('insecure') or insecure
-    ctx.obj = {'__config': config, '__mpp': get_mpp(config)}
 
 
-def is_citus_cluster() -> bool:
+def get_dcs(config: Dict[str, Any], scope: str, group: Optional[int]) -> AbstractDCS:
-    """Check if we are working with Citus cluster.
-
-    :returns: ``True`` if configuration has ``citus`` section, otherwise ``False``.
-    """
-    return click.get_current_context().obj['__mpp'].is_enabled()
-
-
-def get_dcs(scope: str, group: Optional[int]) -> AbstractDCS:
     """Get the DCS object.
 
+    :param config: Patroni configuration.
     :param scope: cluster name.
     :param group: if *group* is defined, use it to select which alternative Citus group this DCS refers to. If *group*
         is ``None`` and a Citus configuration exists, assume this is the coordinator. Coordinator has the group ``0``.
@@ -338,16 +320,14 @@ def get_dcs(scope: str, group: Optional[int]) -> AbstractDCS:
     :raises:
         :class:`PatroniCtlException`: if not suitable DCS configuration could be found.
     """
-    config = _get_configuration()
     config.update({'scope': scope, 'patronictl': True})
     if group is not None:
-        config['citus'] = {'group': group, 'database': 'postgres'}
+        config['citus'] = {'group': group}
     config.setdefault('name', scope)
     try:
         dcs = _get_dcs(config)
-        if is_citus_cluster() and group is None:
+        if config.get('citus') and group is None:
-            dcs.is_mpp_coordinator = lambda: True
+            dcs.is_citus_coordinator = lambda: True
-        click.get_current_context().obj['__mpp'] = dcs.mpp
         return dcs
     except PatroniException as e:
         raise PatroniCtlException(str(e))
@@ -367,7 +347,7 @@ def request_patroni(member: Member, method: str = 'GET',
     ctx = click.get_current_context()  # the current click context
     request_executor = ctx.obj.get('__request_patroni')
     if not request_executor:
-        request_executor = ctx.obj['__request_patroni'] = PatroniRequest(_get_configuration())
+        request_executor = ctx.obj['__request_patroni'] = PatroniRequest(ctx.obj)
     return request_executor(member, method, endpoint, data)
 
 
@@ -434,9 +414,9 @@ def print_output(columns: Optional[List[str]], rows: List[List[Any]], alignment:
 
 
 def watching(w: bool, watch: Optional[int], max_count: Optional[int] = None, clear: bool = True) -> Iterator[int]:
-    """Yield a value every ``watch`` seconds.
+    """Yield a value every ``x`` seconds.
 
-    Used to run a command with a watch-based approach.
+    Used to run a command with a watch-based aproach.
 
     :param w: if ``True`` and *watch* is ``None``, then *watch* assumes the value ``2``.
     :param watch: amount of seconds to wait before yielding another value.
@@ -472,9 +452,11 @@ def watching(w: bool, watch: Optional[int], max_count: Optional[int] = None, cle
         yield 0
 
 
-def get_all_members(cluster: Cluster, group: Optional[int], role: str = 'leader') -> Iterator[Member]:
+def get_all_members(obj: Dict[str, Any], cluster: Cluster,
+                    group: Optional[int], role: str = 'leader') -> Iterator[Member]:
     """Get all cluster members that have the given *role*.
 
+    :param obj: the Patroni configuration.
     :param cluster: the Patroni cluster.
     :param group: filter which Citus group we should get members from. If ``None`` get from all groups.
     :param role: role to filter members. Can be one among:
@@ -488,7 +470,7 @@ def get_all_members(cluster: Cluster, group: Optional[int], role: str = 'leader'
     :yields: members that have the given *role*.
     """
     clusters = {0: cluster}
-    if is_citus_cluster() and group is None:
+    if obj.get('citus') and group is None:
         clusters.update(cluster.workers)
     if role in ('leader', 'master', 'primary', 'standby-leader'):
         # In the DCS the members' role can be one among: ``primary``, ``master``, ``replica`` or ``standby_leader``.
@@ -510,10 +492,11 @@ def get_all_members(cluster: Cluster, group: Optional[int], role: str = 'leader'
                 yield m
 
 
-def get_any_member(cluster: Cluster, group: Optional[int],
+def get_any_member(obj: Dict[str, Any], cluster: Cluster, group: Optional[int],
                    role: Optional[str] = None, member: Optional[str] = None) -> Optional[Member]:
     """Get the first found cluster member that has the given *role*.
 
+    :param obj: the Patroni configuration.
     :param cluster: the Patroni cluster.
     :param group: filter which Citus group we should get members from. If ``None`` get from all groups.
     :param role: role to filter members. See :func:`get_all_members` for available options.
@@ -531,7 +514,7 @@ def get_any_member(cluster: Cluster, group: Optional[int],
     elif role is None:
         role = 'leader'
 
-    for m in get_all_members(cluster, group, role):
+    for m in get_all_members(obj, cluster, group, role):
         if member is None or m.name == member:
             return m
 
@@ -552,7 +535,7 @@ def get_all_members_leader_first(cluster: Cluster) -> Iterator[Member]:
             yield member
 
 
-def get_cursor(cluster: Cluster, group: Optional[int], connect_parameters: Dict[str, Any],
+def get_cursor(obj: Dict[str, Any], cluster: Cluster, group: Optional[int], connect_parameters: Dict[str, Any],
                role: Optional[str] = None, member_name: Optional[str] = None) -> Union['cursor', 'Cursor[Any]', None]:
     """Get a cursor object to execute queries against a member that has the given *role* or *member_name*.
 
@@ -561,6 +544,7 @@ def get_cursor(cluster: Cluster, group: Optional[int], connect_parameters: Dict[
             * ``fallback_application_name``: as ``Patroni ctl``;
             * ``connect_timeout``: as ``5``.
 
+    :param obj: the Patroni configuration.
     :param cluster: the Patroni cluster.
     :param group: filter which Citus group we should get members to create a cursor against. If ``None`` consider
         members from all groups.
@@ -575,7 +559,7 @@ def get_cursor(cluster: Cluster, group: Optional[int], connect_parameters: Dict[
         * A :class:`psycopg2.extensions.cursor` if using :mod:`psycopg2`;
         * ``None`` if not able to get a cursor that attendees *role* and *member_name*.
     """
-    member = get_any_member(cluster, group, role=role, member=member_name)
+    member = get_any_member(obj, cluster, group, role=role, member=member_name)
     if member is None:
         return None
 
@@ -610,7 +594,7 @@ def get_cursor(cluster: Cluster, group: Optional[int], connect_parameters: Dict[
     return None
 
 
-def get_members(cluster: Cluster, cluster_name: str, member_names: List[str], role: str,
+def get_members(obj: Dict[str, Any], cluster: Cluster, cluster_name: str, member_names: List[str], role: str,
                 force: bool, action: str, ask_confirmation: bool = True, group: Optional[int] = None) -> List[Member]:
     """Get the list of members based on the given filters.
 
@@ -634,6 +618,7 @@ def get_members(cluster: Cluster, cluster_name: str, member_names: List[str], ro
         ``ask_confirmation=False``, and later call :func:`confirm_members_action` manually in the caller method. That
         way the workflow won't look broken to the user that is interacting with ``patronictl``.
 
+    :param obj: Patroni configuration.
     :param cluster: Patroni cluster.
     :param cluster_name: name of the Patroni cluster.
     :param member_names: used to filter which members should take the *action* based on their names. Each item is the
@@ -662,13 +647,13 @@ def get_members(cluster: Cluster, cluster_name: str, member_names: List[str], ro
             * Cluster does not have members that match the given *member_names*; or
             * No member with given *role* is found among the specified *member_names*.
     """
-    members = list(get_all_members(cluster, group, role))
+    members = list(get_all_members(obj, cluster, group, role))
 
     candidates = {m.name for m in members}
     if not force or role:
         if not member_names and not candidates:
             raise PatroniCtlException('{0} cluster doesn\'t have any members'.format(cluster_name))
-        output_members(cluster, cluster_name, group=group)
+        output_members(obj, cluster, cluster_name, group=group)
 
     if member_names:
         member_names = list(set(member_names) & candidates)
@@ -728,7 +713,9 @@ def confirm_members_action(members: List[Member], force: bool, action: str,
 @click.option('--member', '-m', help='Generate a dsn for this member', type=str)
 @arg_cluster_name
 @option_citus_group
-def dsn(cluster_name: str, group: Optional[int], role: Optional[str], member: Optional[str]) -> None:
+@click.pass_obj
+def dsn(obj: Dict[str, Any], cluster_name: str, group: Optional[int],
+        role: Optional[str], member: Optional[str]) -> None:
     """Process ``dsn`` command of ``patronictl`` utility.
 
     Get DSN to connect to *member*.
@@ -736,6 +723,7 @@ def dsn(cluster_name: str, group: Optional[int], role: Optional[str], member: Op
     .. note::
         If no *role* nor *member* is given assume *role* as ``leader``.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should get members to get DSN from. Refer to the module note for more
         details.
@@ -748,8 +736,8 @@ def dsn(cluster_name: str, group: Optional[int], role: Optional[str], member: Op
             * both *role* and *member* are provided; or
             * No member matches requested *member* or *role*.
     """
-    cluster = get_dcs(cluster_name, group).get_cluster()
+    cluster = get_dcs(obj, cluster_name, group).get_cluster()
-    m = get_any_member(cluster, group, role=role, member=member)
+    m = get_any_member(obj, cluster, group, role=role, member=member)
     if m is None:
         raise PatroniCtlException('Can not find a suitable member')
 
@@ -771,7 +759,9 @@ def dsn(cluster_name: str, group: Optional[int], role: Optional[str], member: Op
 @click.option('--delimiter', help='The column delimiter', default='\t')
 @click.option('--command', '-c', help='The SQL commands to execute')
 @click.option('-d', '--dbname', help='database name to connect to', type=str)
+@click.pass_obj
 def query(
+    obj: Dict[str, Any],
     cluster_name: str,
     group: Optional[int],
     role: Optional[str],
@@ -790,6 +780,7 @@ def query(
 
     Perform a Postgres query in a Patroni node.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should get members from to perform the query. Refer to the module note for
         more details.
@@ -829,22 +820,24 @@ def query(
     if dbname:
         connect_parameters['dbname'] = dbname
 
-    dcs = get_dcs(cluster_name, group)
+    dcs = get_dcs(obj, cluster_name, group)
 
     cluster = cursor = None
     for _ in watching(w, watch, clear=False):
         if cluster is None:
             cluster = dcs.get_cluster()
+#            cursor = get_cursor(obj, cluster, group, connect_parameters, role=role, member=member)
 
-        output, header = query_member(cluster, group, cursor, member, role, sql, connect_parameters)
+        output, header = query_member(obj, cluster, group, cursor, member, role, sql, connect_parameters)
         print_output(header, output, fmt=fmt, delimiter=delimiter)
 
 
-def query_member(cluster: Cluster, group: Optional[int], cursor: Union['cursor', 'Cursor[Any]', None],
+def query_member(obj: Dict[str, Any], cluster: Cluster, group: Optional[int],
-                 member: Optional[str], role: Optional[str], command: str,
+                 cursor: Union['cursor', 'Cursor[Any]', None], member: Optional[str], role: Optional[str],
-                 connect_parameters: Dict[str, Any]) -> Tuple[List[List[Any]], Optional[List[Any]]]:
+                 command: str, connect_parameters: Dict[str, Any]) -> Tuple[List[List[Any]], Optional[List[Any]]]:
     """Execute SQL *command* against a member.
 
+    :param obj: Patroni configuration.
     :param cluster: the Patroni cluster.
     :param group: filter which Citus group we should get members from to perform the query. Refer to the module note for
         more details.
@@ -873,7 +866,7 @@ def query_member(cluster: Cluster, group: Optional[int], cursor: Union['cursor',
     from . import psycopg
     try:
         if cursor is None:
-            cursor = get_cursor(cluster, group, connect_parameters, role=role, member_name=member)
+            cursor = get_cursor(obj, cluster, group, connect_parameters, role=role, member_name=member)
 
         if cursor is None:
             if member is not None:
@@ -900,11 +893,13 @@ def query_member(cluster: Cluster, group: Optional[int], cursor: Union['cursor',
 @click.argument('cluster_name')
 @option_citus_group
 @option_format
-def remove(cluster_name: str, group: Optional[int], fmt: str) -> None:
+@click.pass_obj
+def remove(obj: Dict[str, Any], cluster_name: str, group: Optional[int], fmt: str) -> None:
     """Process ``remove`` command of ``patronictl`` utility.
 
     Remove cluster *cluster_name* from the DCS.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the cluster which information will be wiped out of the DCS.
     :param group: which Citus group should have its information wiped out of the DCS. Refer to the module note for more
         details.
@@ -918,12 +913,12 @@ def remove(cluster_name: str, group: Optional[int], fmt: str) -> None:
             * use did not type the correct leader name when requesting removal of a healthy cluster.
 
     """
-    dcs = get_dcs(cluster_name, group)
+    dcs = get_dcs(obj, cluster_name, group)
     cluster = dcs.get_cluster()
 
-    if is_citus_cluster() and group is None:
+    if obj.get('citus') and group is None:
         raise PatroniCtlException('For Citus clusters the --group must me specified')
-    output_members(cluster, cluster_name, fmt=fmt)
+    output_members(obj, cluster, cluster_name, fmt=fmt)
 
     confirm = click.prompt('Please confirm the cluster name to remove', type=str)
     if confirm != cluster_name:
@@ -1008,28 +1003,31 @@ def parse_scheduled(scheduled: Optional[str]) -> Optional[datetime.datetime]:
 @option_citus_group
 @click.option('--role', '-r', help='Reload only members with this role', type=role_choice, default='any')
 @option_force
-def reload(cluster_name: str, member_names: List[str], group: Optional[int], force: bool, role: str) -> None:
+@click.pass_obj
+def reload(obj: Dict[str, Any], cluster_name: str, member_names: List[str],
+           group: Optional[int], force: bool, role: str) -> None:
     """Process ``reload`` command of ``patronictl`` utility.
 
     Reload configuration of cluster members based on given filters.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param member_names: name of the members which configuration should be reloaded.
     :param group: filter which Citus group we should reload members. Refer to the module note for more details.
     :param force: perform the reload without asking for confirmations.
     :param role: role to filter members. See :func:`get_all_members` for available options.
     """
-    dcs = get_dcs(cluster_name, group)
+    dcs = get_dcs(obj, cluster_name, group)
     cluster = dcs.get_cluster()
 
-    members = get_members(cluster, cluster_name, member_names, role, force, 'reload', group=group)
+    members = get_members(obj, cluster, cluster_name, member_names, role, force, 'reload', group=group)
 
     for member in members:
         r = request_patroni(member, 'post', 'reload')
         if r.status == 200:
             click.echo('No changes to apply on member {0}'.format(member.name))
         elif r.status == 202:
-            config = global_config.from_cluster(cluster)
+            config = get_global_config(cluster)
             click.echo('Reload request received for member {0} and will be processed within {1} seconds'.format(
                 member.name, config.get('loop_wait') or dcs.loop_wait)
             )
@@ -1052,13 +1050,15 @@ def reload(cluster_name: str, member_names: List[str], group: Optional[int], for
 @click.option('--pending', help='Restart if pending', is_flag=True)
 @click.option('--timeout', help='Return error and fail over if necessary when restarting takes longer than this.')
 @option_force
-def restart(cluster_name: str, group: Optional[int], member_names: List[str],
+@click.pass_obj
+def restart(obj: Dict[str, Any], cluster_name: str, group: Optional[int], member_names: List[str],
             force: bool, role: str, p_any: bool, scheduled: Optional[str], version: Optional[str],
             pending: bool, timeout: Optional[str]) -> None:
     """Process ``restart`` command of ``patronictl`` utility.
 
     Restart Postgres on cluster members based on given filters.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should restart members. Refer to the module note for more details.
     :param member_names: name of the members that should be restarted.
@@ -1076,9 +1076,9 @@ def restart(cluster_name: str, group: Optional[int], member_names: List[str],
             * *version* could not be parsed; or
             * a restart is attempted against a cluster that is in maintenance mode.
     """
-    cluster = get_dcs(cluster_name, group).get_cluster()
+    cluster = get_dcs(obj, cluster_name, group).get_cluster()
 
-    members = get_members(cluster, cluster_name, member_names, role, force, 'restart', False, group=group)
+    members = get_members(obj, cluster, cluster_name, member_names, role, force, 'restart', False, group=group)
     if scheduled is None and not force:
         next_hour = (datetime.datetime.now() + datetime.timedelta(hours=1)).strftime('%Y-%m-%dT%H:%M')
         scheduled = click.prompt('When should the restart take place (e.g. ' + next_hour + ') ',
@@ -1108,7 +1108,7 @@ def restart(cluster_name: str, group: Optional[int], member_names: List[str],
         content['postgres_version'] = version
 
     if scheduled_at:
-        if global_config.from_cluster(cluster).is_paused:
+        if get_global_config(cluster).is_paused:
             raise PatroniCtlException("Can't schedule restart in the paused state")
         content['schedule'] = scheduled_at.isoformat()
 
@@ -1140,7 +1140,9 @@ def restart(cluster_name: str, group: Optional[int], member_names: List[str],
 @click.argument('member_names', nargs=-1)
 @option_force
 @click.option('--wait', help='Wait until reinitialization completes', is_flag=True)
-def reinit(cluster_name: str, group: Optional[int], member_names: List[str], force: bool, wait: bool) -> None:
+@click.pass_obj
+def reinit(obj: Dict[str, Any], cluster_name: str, group: Optional[int],
+           member_names: List[str], force: bool, wait: bool) -> None:
     """Process ``reinit`` command of ``patronictl`` utility.
 
     Reinitialize cluster members based on given filters.
@@ -1148,14 +1150,15 @@ def reinit(cluster_name: str, group: Optional[int], member_names: List[str], for
     .. note::
         Only reinitialize replica members, not a leader.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should reinit members. Refer to the module note for more details.
     :param member_names: name of the members that should be reinitialized.
     :param force: perform the restart without asking for confirmations.
     :param wait: wait for the operation to complete.
     """
-    cluster = get_dcs(cluster_name, group).get_cluster()
+    cluster = get_dcs(obj, cluster_name, group).get_cluster()
-    members = get_members(cluster, cluster_name, member_names, 'replica', force, 'reinitialize', group=group)
+    members = get_members(obj, cluster, cluster_name, member_names, 'replica', force, 'reinitialize', group=group)
 
     wait_on_members: List[Member] = []
     for member in members:
@@ -1186,8 +1189,8 @@ def reinit(cluster_name: str, group: Optional[int], member_names: List[str], for
                 wait_on_members.remove(member)
 
 
-def _do_failover_or_switchover(action: str, cluster_name: str, group: Optional[int],
+def _do_failover_or_switchover(obj: Dict[str, Any], action: str, cluster_name: str,
-                               switchover_leader: Optional[str], candidate: Optional[str],
+                               group: Optional[int], leader: Optional[str], candidate: Optional[str],
                                force: bool, scheduled: Optional[str] = None) -> None:
     """Perform a failover or a switchover operation in the cluster.
 
@@ -1197,11 +1200,12 @@ def _do_failover_or_switchover(action: str, cluster_name: str, group: Optional[i
     .. note::
         If not able to perform the operation through the REST API, write directly to the DCS as a fall back.
 
+    :param obj: Patroni configuration.
     :param action: action to be taken -- ``failover`` or ``switchover``.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter Citus group within we should perform a failover or switchover. If ``None``, user will be
         prompted for filling it -- unless *force* is ``True``, in which case an exception is raised.
-    :param switchover_leader: name of the leader member passed as switchover option.
+    :param leader: name of the current leader member.
     :param candidate: name of a standby member to be promoted. Nodes that are tagged with ``nofailover`` cannot be used.
     :param force: perform the failover or switchover without asking for confirmations.
     :param scheduled: timestamp when the switchover should be scheduled to occur. If ``now`` perform immediately.
@@ -1210,48 +1214,46 @@ def _do_failover_or_switchover(action: str, cluster_name: str, group: Optional[i
         :class:`PatroniCtlException`: if:
             * Patroni is running on a Citus cluster, but no *group* was specified; or
             * a switchover was requested by the cluster has no leader; or
-            * *switchover_leader* does not match the current leader of the cluster; or
+            * *leader* does not match the current leader of the cluster; or
             * cluster has no candidates available for the operation; or
             * no *candidate* is given for a failover operation; or
-            * current leader and *candidate* are the same; or
+            * *leader* and *candidate* are the same; or
-            * *candidate* is tagged as nofailover; or
             * *candidate* is not a member of the cluster; or
             * trying to schedule a switchover in a cluster that is in maintenance mode; or
             * user aborts the operation.
     """
-    dcs = get_dcs(cluster_name, group)
+    dcs = get_dcs(obj, cluster_name, group)
     cluster = dcs.get_cluster()
     click.echo('Current cluster topology')
-    output_members(cluster, cluster_name, group=group)
+    output_members(obj, cluster, cluster_name, group=group)
 
-    if is_citus_cluster() and group is None:
+    if obj.get('citus') and group is None:
         if force:
             raise PatroniCtlException('For Citus clusters the --group must me specified')
         else:
             group = click.prompt('Citus group', type=int)
-            dcs = get_dcs(cluster_name, group)
+            dcs = get_dcs(obj, cluster_name, group)
             cluster = dcs.get_cluster()
 
-    config = global_config.from_cluster(cluster)
+    global_config = get_global_config(cluster)
 
-    cluster_leader = cluster.leader and cluster.leader.name
     # leader has to be be defined for switchover only
     if action == 'switchover':
-        if not cluster_leader:
+        if cluster.leader is None or not cluster.leader.name:
             raise PatroniCtlException('This cluster has no leader')
 
-        if switchover_leader is None:
+        if leader is None:
             if force:
-                switchover_leader = cluster_leader
+                leader = cluster.leader.name
             else:
-                prompt = 'Standby Leader' if config.is_standby_cluster else 'Primary'
+                prompt = 'Standby Leader' if global_config.is_standby_cluster else 'Primary'
-                switchover_leader = click.prompt(prompt, type=str, default=cluster_leader)
+                leader = click.prompt(prompt, type=str, default=(cluster.leader and cluster.leader.name))
 
-        if cluster_leader != switchover_leader:
+        if cluster.leader.name != leader:
-            raise PatroniCtlException(f'Member {switchover_leader} is not the leader of cluster {cluster_name}')
+            raise PatroniCtlException(f'Member {leader} is not the leader of cluster {cluster_name}')
 
     # excluding members with nofailover tag
-    candidate_names = [str(m.name) for m in cluster.members if m.name != cluster_leader and not m.nofailover]
+    candidate_names = [str(m.name) for m in cluster.members if m.name != leader and not m.nofailover]
     # We sort the names for consistent output to the client
     candidate_names.sort()
 
@@ -1264,19 +1266,19 @@ def _do_failover_or_switchover(action: str, cluster_name: str, group: Optional[i
     if action == 'failover' and not candidate:
         raise PatroniCtlException('Failover could be performed only to a specific candidate')
 
+    if candidate == leader:
+        raise PatroniCtlException(action.title() + ' target and source are the same.')
+
     if candidate and candidate not in candidate_names:
-        if candidate == cluster_leader:
-            raise PatroniCtlException(
-                f'Member {candidate} is already the leader of cluster {cluster_name}')
         raise PatroniCtlException(
             f'Member {candidate} does not exist in cluster {cluster_name} or is tagged as nofailover')
 
     if all((not force,
             action == 'failover',
-            config.is_synchronous_mode,
+            global_config.is_synchronous_mode,
             not cluster.sync.is_empty,
             not cluster.sync.matches(candidate, True))):
-        if not click.confirm(f'Are you sure you want to failover to the asynchronous node {candidate}?'):
+        if click.confirm(f'Are you sure you want to failover to the asynchronous node {candidate}'):
             raise PatroniCtlException('Aborting ' + action)
 
     scheduled_at_str = None
@@ -1290,13 +1292,13 @@ def _do_failover_or_switchover(action: str, cluster_name: str, group: Optional[i
 
         scheduled_at = parse_scheduled(scheduled)
         if scheduled_at:
-            if config.is_paused:
+            if global_config.is_paused:
                 raise PatroniCtlException("Can't schedule switchover in the paused state")
             scheduled_at_str = scheduled_at.isoformat()
 
     failover_value = {'candidate': candidate}
     if action == 'switchover':
-        failover_value['leader'] = switchover_leader
+        failover_value['leader'] = leader
     if scheduled_at_str:
         failover_value['scheduled_at'] = scheduled_at_str
 
@@ -1304,7 +1306,7 @@ def _do_failover_or_switchover(action: str, cluster_name: str, group: Optional[i
 
     # By now we have established that the leader exists and the candidate exists
     if not force:
-        demote_msg = f', demoting current leader {cluster_leader}' if cluster_leader else ''
+        demote_msg = f', demoting current leader {cluster.leader.name}' if cluster.leader else ''
         if scheduled_at_str:
             # only switchover can be scheduled
             if not click.confirm(f'Are you sure you want to schedule switchover of cluster '
@@ -1338,9 +1340,9 @@ def _do_failover_or_switchover(action: str, cluster_name: str, group: Optional[i
         logging.exception(r)
         logging.warning('Failing over to DCS')
         click.echo('{0} Could not {1} using Patroni api, falling back to DCS'.format(timestamp(), action))
-        dcs.manual_failover(switchover_leader, candidate, scheduled_at=scheduled_at)
+        dcs.manual_failover(leader, candidate, scheduled_at=scheduled_at)
 
-    output_members(cluster, cluster_name, group=group)
+    output_members(obj, cluster, cluster_name, group=group)
 
 
 @ctl.command('failover', help='Failover to a replica')
@@ -1349,7 +1351,8 @@ def _do_failover_or_switchover(action: str, cluster_name: str, group: Optional[i
 @click.option('--leader', '--primary', '--master', 'leader', help='The name of the current leader', default=None)
 @click.option('--candidate', help='The name of the candidate', default=None)
 @option_force
-def failover(cluster_name: str, group: Optional[int],
+@click.pass_obj
+def failover(obj: Dict[str, Any], cluster_name: str, group: Optional[int],
              leader: Optional[str], candidate: Optional[str], force: bool) -> None:
     """Process ``failover`` command of ``patronictl`` utility.
 
@@ -1363,6 +1366,7 @@ def failover(cluster_name: str, group: Optional[int],
     .. seealso::
         Refer to :func:`_do_failover_or_switchover` for details.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter Citus group within we should perform a failover or switchover. If ``None``, user will be
         prompted for filling it -- unless *force* is ``True``, in which case an exception is raised by
@@ -1377,7 +1381,7 @@ def failover(cluster_name: str, group: Optional[int],
         click.echo(click.style(
             'Supplying a leader name using this command is deprecated and will be removed in a future version of'
             ' Patroni, change your scripts to use `switchover` instead.\nExecuting switchover!', fg='red'))
-    _do_failover_or_switchover(action, cluster_name, group, leader, candidate, force)
+    _do_failover_or_switchover(obj, action, cluster_name, group, leader, candidate, force)
 
 
 @ctl.command('switchover', help='Switchover to a replica')
@@ -1388,8 +1392,9 @@ def failover(cluster_name: str, group: Optional[int],
 @click.option('--scheduled', help='Timestamp of a scheduled switchover in unambiguous format (e.g. ISO 8601)',
               default=None)
 @option_force
-def switchover(cluster_name: str, group: Optional[int], leader: Optional[str],
+@click.pass_obj
-               candidate: Optional[str], force: bool, scheduled: Optional[str]) -> None:
+def switchover(obj: Dict[str, Any], cluster_name: str, group: Optional[int],
+               leader: Optional[str], candidate: Optional[str], force: bool, scheduled: Optional[str]) -> None:
     """Process ``switchover`` command of ``patronictl`` utility.
 
     Perform a switchover operation in the cluster.
@@ -1397,6 +1402,7 @@ def switchover(cluster_name: str, group: Optional[int], leader: Optional[str],
     .. seealso::
         Refer to :func:`_do_failover_or_switchover` for details.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter Citus group within we should perform a switchover. If ``None``, user will be prompted for
         filling it -- unless *force* is ``True``, in which case an exception is raised by
@@ -1406,11 +1412,11 @@ def switchover(cluster_name: str, group: Optional[int], leader: Optional[str],
     :param force: perform the switchover without asking for confirmations.
     :param scheduled: timestamp when the switchover should be scheduled to occur. If ``now`` perform immediately.
     """
-    _do_failover_or_switchover('switchover', cluster_name, group, leader, candidate, force, scheduled)
+    _do_failover_or_switchover(obj, 'switchover', cluster_name, group, leader, candidate, force, scheduled)
 
 
 def generate_topology(level: int, member: Dict[str, Any],
-                      topology: Dict[Optional[str], List[Dict[str, Any]]]) -> Iterator[Dict[str, Any]]:
+                      topology: Dict[str, List[Dict[str, Any]]]) -> Iterator[Dict[str, Any]]:
     """Recursively yield members with their names adjusted according to their *level* in the cluster topology.
 
     .. note::
@@ -1473,7 +1479,7 @@ def topology_sort(members: List[Dict[str, Any]]) -> Iterator[Dict[str, Any]]:
     :yields: *members* sorted by level in the topology, and with a new ``name`` value according to their level
         in the topology.
     """
-    topology: Dict[Optional[str], List[Dict[str, Any]]] = defaultdict(list)
+    topology: Dict[str, List[Dict[str, Any]]] = defaultdict(list)
     leader = next((m for m in members if m['role'].endswith('leader')), {'name': None})
     replicas = set(member['name'] for member in members if not member['role'].endswith('leader'))
     for member in members:
@@ -1508,8 +1514,8 @@ def get_cluster_service_info(cluster: Dict[str, Any]) -> List[str]:
     return service_info
 
 
-def output_members(cluster: Cluster, name: str, extended: bool = False,
+def output_members(obj: Dict[str, Any], cluster: Cluster, name: str,
-                   fmt: str = 'pretty', group: Optional[int] = None) -> None:
+                   extended: bool = False, fmt: str = 'pretty', group: Optional[int] = None) -> None:
     """Print information about the Patroni cluster and its members.
 
     Information is printed to console through :func:`print_output`, and contains:
@@ -1534,6 +1540,7 @@ def output_members(cluster: Cluster, name: str, extended: bool = False,
     The 3 extended columns are always included if *extended*, even if the member has no value for a given column.
     If not *extended*, these columns may still be shown if any of the members has any information for them.
 
+    :param obj: Patroni configuration.
     :param cluster: Patroni cluster.
     :param name: name of the Patroni cluster.
     :param extended: if extended information (pending restarts, scheduled restarts, node tags) should be printed, if
@@ -1551,14 +1558,15 @@ def output_members(cluster: Cluster, name: str, extended: bool = False,
 
     clusters = {group or 0: cluster_as_json(cluster)}
 
-    if is_citus_cluster():
+    is_citus_cluster = obj.get('citus')
+    if is_citus_cluster:
         columns.insert(1, 'Group')
         if group is None:
             clusters.update({g: cluster_as_json(c) for g, c in cluster.workers.items()})
 
     all_members = [m for c in clusters.values() for m in c['members'] if 'host' in m]
 
-    for c in ('Pending restart', 'Pending restart reason', 'Scheduled restart', 'Tags'):
+    for c in ('Pending restart', 'Scheduled restart', 'Tags'):
         if extended or any(m.get(c.lower().replace(' ', '_')) for m in all_members):
             columns.append(c)
 
@@ -1572,19 +1580,11 @@ def output_members(cluster: Cluster, name: str, extended: bool = False,
             logging.debug(member)
 
             lag = member.get('lag', '')
-
-            def format_diff(param: str, values: Dict[str, str], hide_long: bool):
-                full_diff = param + ': ' + values['old_value'] + '->' + values['new_value']
-                return full_diff if not hide_long or len(full_diff) <= 50 else param + ': [hidden - too long]'
-            restart_reason = '\n'.join([format_diff(k, v, fmt in ('pretty', 'topology'))
-                                        for k, v in member.get('pending_restart_reason', {}).items()]) or ''
-
             member.update(cluster=name, member=member['name'], group=g,
                           host=member.get('host', ''), tl=member.get('timeline', ''),
                           role=member['role'].replace('_', ' ').title(),
                           lag_in_mb=round(lag / 1024 / 1024) if isinstance(lag, int) else lag,
-                          pending_restart='*' if member.get('pending_restart') else '',
+                          pending_restart='*' if member.get('pending_restart') else '')
-                          pending_restart_reason=restart_reason)
 
             if append_port and member['host'] and member.get('port'):
                 member['host'] = ':'.join([member['host'], str(member['port'])])
@@ -1597,12 +1597,10 @@ def output_members(cluster: Cluster, name: str, extended: bool = False,
 
             rows.append([member.get(n.lower().replace(' ', '_'), '') for n in columns])
 
-    if is_citus_cluster():
+    title = 'Citus cluster' if is_citus_cluster else 'Cluster'
-        title = 'Citus cluster'
+    title_details = f' ({initialize})'
+    if is_citus_cluster:
         title_details = '' if group is None else f' (group: {group}, {initialize})'
-    else:
-        title = 'Cluster'
-        title_details = f' ({initialize})'
 
     title = f' {title}: {name}{title_details} '
     print_output(columns, rows, {'Group': 'r', 'Lag in MB': 'r', 'TL': 'r'}, fmt, title)
@@ -1613,7 +1611,7 @@ def output_members(cluster: Cluster, name: str, extended: bool = False,
     for g, c in sorted(clusters.items()):
         service_info = get_cluster_service_info(c)
         if service_info:
-            if is_citus_cluster() and group is None:
+            if is_citus_cluster and group is None:
                 click.echo('Citus group: {0}'.format(g))
             click.echo(' ' + '\n '.join(service_info))
 
@@ -1626,14 +1624,16 @@ def output_members(cluster: Cluster, name: str, extended: bool = False,
 @option_format
 @option_watch
 @option_watchrefresh
-def members(cluster_names: List[str], group: Optional[int], fmt: str,
+@click.pass_obj
-            watch: Optional[int], w: bool, extended: bool, ts: bool) -> None:
+def members(obj: Dict[str, Any], cluster_names: List[str], group: Optional[int],
+            fmt: str, watch: Optional[int], w: bool, extended: bool, ts: bool) -> None:
     """Process ``list`` command of ``patronictl`` utility.
 
     Print information about the Patroni cluster through :func:`output_members`.
 
+    :param obj: Patroni configuration.
     :param cluster_names: name of clusters that should be printed. If ``None`` consider only the cluster present in
-        ``scope`` key of the configuration.
+        ``scope`` key of *obj*.
     :param group: filter which Citus group we should get members from. Refer to the module note for more details.
     :param fmt: the output table printing format. See :func:`print_output` for available options.
     :param watch: if given print output every *watch* seconds.
@@ -1642,10 +1642,9 @@ def members(cluster_names: List[str], group: Optional[int], fmt: str,
         more details.
     :param ts: if timestamp should be included in the output.
     """
-    config = _get_configuration()
     if not cluster_names:
-        if 'scope' in config:
+        if 'scope' in obj:
-            cluster_names = [config['scope']]
+            cluster_names = [obj['scope']]
         if not cluster_names:
             return logging.warning('Listing members: No cluster names were provided')
 
@@ -1654,10 +1653,10 @@ def members(cluster_names: List[str], group: Optional[int], fmt: str,
             click.echo(timestamp(0))
 
         for cluster_name in cluster_names:
-            dcs = get_dcs(cluster_name, group)
+            dcs = get_dcs(obj, cluster_name, group)
 
             cluster = dcs.get_cluster()
-            output_members(cluster, cluster_name, extended, fmt, group)
+            output_members(obj, cluster, cluster_name, extended, fmt, group)
 
 
 @ctl.command('topology', help='Prints ASCII topology for given cluster')
@@ -1699,12 +1698,14 @@ def timestamp(precision: int = 6) -> str:
 @click.argument('target', type=click.Choice(['restart', 'switchover']))
 @click.option('--role', '-r', help='Flush only members with this role', type=role_choice, default='any')
 @option_force
-def flush(cluster_name: str, group: Optional[int],
+@click.pass_obj
+def flush(obj: Dict[str, Any], cluster_name: str, group: Optional[int],
           member_names: List[str], force: bool, role: str, target: str) -> None:
     """Process ``flush`` command of ``patronictl`` utility.
 
     Discard scheduled restart or switchover events.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should flush an event. Refer to the module note for more details.
     :param member_names: name of the members which events should be flushed.
@@ -1712,11 +1713,11 @@ def flush(cluster_name: str, group: Optional[int],
     :param role: role to filter members. See :func:`get_all_members` for available options.
     :param target: the event that should be flushed -- ``restart`` or ``switchover``.
     """
-    dcs = get_dcs(cluster_name, group)
+    dcs = get_dcs(obj, cluster_name, group)
     cluster = dcs.get_cluster()
 
     if target == 'restart':
-        for member in get_members(cluster, cluster_name, member_names, role, force, 'flush', group=group):
+        for member in get_members(obj, cluster, cluster_name, member_names, role, force, 'flush', group=group):
             if member.data.get('scheduled_restart'):
                 r = request_patroni(member, 'delete', 'restart')
                 check_response(r, member.name, 'flush scheduled restart')
@@ -1752,7 +1753,7 @@ def wait_until_pause_is_applied(dcs: AbstractDCS, paused: bool, old_cluster: Clu
     :param old_cluster: original cluster information before pause or unpause has been requested. Used to report which
         nodes are still pending to have ``pause`` equal *paused* at a given point in time.
     """
-    config = global_config.from_cluster(old_cluster)
+    config = get_global_config(old_cluster)
 
     click.echo("'{0}' request sent, waiting until it is recognized by all nodes".format(paused and 'pause' or 'resume'))
     old = {m.name: m.version for m in old_cluster.members if m.api_url}
@@ -1774,9 +1775,10 @@ def wait_until_pause_is_applied(dcs: AbstractDCS, paused: bool, old_cluster: Clu
     return click.echo('Success: cluster management is {0}'.format(paused and 'paused' or 'resumed'))
 
 
-def toggle_pause(cluster_name: str, group: Optional[int], paused: bool, wait: bool) -> None:
+def toggle_pause(config: Dict[str, Any], cluster_name: str, group: Optional[int], paused: bool, wait: bool) -> None:
     """Toggle the ``pause`` state in the cluster members.
 
+    :param config: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should toggle the pause state of. Refer to the module note for more
         details.
@@ -1788,9 +1790,9 @@ def toggle_pause(cluster_name: str, group: Optional[int], paused: bool, wait: bo
             * ``pause`` state is already *paused*; or
             * cluster contains no accessible members.
     """
-    dcs = get_dcs(cluster_name, group)
+    dcs = get_dcs(config, cluster_name, group)
     cluster = dcs.get_cluster()
-    if global_config.from_cluster(cluster).is_paused == paused:
+    if get_global_config(cluster).is_paused == paused:
         raise PatroniCtlException('Cluster is {0} paused'.format(paused and 'already' or 'not'))
 
     for member in get_all_members_leader_first(cluster):
@@ -1817,33 +1819,37 @@ def toggle_pause(cluster_name: str, group: Optional[int], paused: bool, wait: bo
 @ctl.command('pause', help='Disable auto failover')
 @arg_cluster_name
 @option_default_citus_group
+@click.pass_obj
 @click.option('--wait', help='Wait until pause is applied on all nodes', is_flag=True)
-def pause(cluster_name: str, group: Optional[int], wait: bool) -> None:
+def pause(obj: Dict[str, Any], cluster_name: str, group: Optional[int], wait: bool) -> None:
     """Process ``pause`` command of ``patronictl`` utility.
 
     Put the cluster in maintenance mode.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should pause. Refer to the module note for more details.
     :param wait: ``True`` if it should block until the operation is finished or ``false`` for returning immediately.
     """
-    return toggle_pause(cluster_name, group, True, wait)
+    return toggle_pause(obj, cluster_name, group, True, wait)
 
 
 @ctl.command('resume', help='Resume auto failover')
 @arg_cluster_name
 @option_default_citus_group
 @click.option('--wait', help='Wait until pause is cleared on all nodes', is_flag=True)
-def resume(cluster_name: str, group: Optional[int], wait: bool) -> None:
+@click.pass_obj
+def resume(obj: Dict[str, Any], cluster_name: str, group: Optional[int], wait: bool) -> None:
     """Process ``unpause`` command of ``patronictl`` utility.
 
     Put the cluster out of maintenance mode.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should unpause. Refer to the module note for more details.
     :param wait: ``True`` if it should block until the operation is finished or ``false`` for returning immediately.
     """
-    return toggle_pause(cluster_name, group, False, wait)
+    return toggle_pause(obj, cluster_name, group, False, wait)
 
 
 @contextmanager
@@ -2075,12 +2081,15 @@ def invoke_editor(before_editing: str, cluster_name: str) -> Tuple[str, Dict[str
 @click.option('--replace', 'replace_filename', help='Apply configuration from file, replacing existing configuration.'
               ' Use - for stdin.')
 @option_force
-def edit_config(cluster_name: str, group: Optional[int], force: bool, quiet: bool, kvpairs: List[str],
+@click.pass_obj
-                pgkvpairs: List[str], apply_filename: Optional[str], replace_filename: Optional[str]) -> None:
+def edit_config(obj: Dict[str, Any], cluster_name: str, group: Optional[int],
+                force: bool, quiet: bool, kvpairs: List[str], pgkvpairs: List[str],
+                apply_filename: Optional[str], replace_filename: Optional[str]) -> None:
     """Process ``edit-config`` command of ``patronictl`` utility.
 
     Update or replace Patroni configuration in the DCS.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group configuration we should edit. Refer to the module note for more details.
     :param force: if ``True`` apply config changes without asking for confirmations.
@@ -2097,7 +2106,7 @@ def edit_config(cluster_name: str, group: Optional[int], force: bool, quiet: boo
             * Configuration is absent from DCS; or
             * Detected a concurrent modification of the configuration in the DCS.
     """
-    dcs = get_dcs(cluster_name, group)
+    dcs = get_dcs(obj, cluster_name, group)
     cluster = dcs.get_cluster()
 
     if not cluster.config:
@@ -2135,7 +2144,7 @@ def edit_config(cluster_name: str, group: Optional[int], force: bool, quiet: boo
         return
 
     if force or click.confirm('Apply these changes?'):
-        if not dcs.set_config_value(json.dumps(changed_data, separators=(',', ':')), cluster.config.version):
+        if not dcs.set_config_value(json.dumps(changed_data), cluster.config.version):
             raise PatroniCtlException("Config modification aborted due to concurrent changes")
         click.echo("Configuration changed")
 
@@ -2143,15 +2152,17 @@ def edit_config(cluster_name: str, group: Optional[int], force: bool, quiet: boo
 @ctl.command('show-config', help="Show cluster configuration")
 @arg_cluster_name
 @option_default_citus_group
-def show_config(cluster_name: str, group: Optional[int]) -> None:
+@click.pass_obj
+def show_config(obj: Dict[str, Any], cluster_name: str, group: Optional[int]) -> None:
     """Process ``show-config`` command of ``patronictl`` utility.
 
     Show Patroni configuration stored in the DCS.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group configuration we should show. Refer to the module note for more details.
     """
-    cluster = get_dcs(cluster_name, group).get_cluster()
+    cluster = get_dcs(obj, cluster_name, group).get_cluster()
     if cluster.config:
         click.echo(format_config_for_editing(cluster.config.data))
 
@@ -2160,7 +2171,8 @@ def show_config(cluster_name: str, group: Optional[int]) -> None:
 @click.argument('cluster_name', required=False)
 @click.argument('member_names', nargs=-1)
 @option_citus_group
-def version(cluster_name: str, group: Optional[int], member_names: List[str]) -> None:
+@click.pass_obj
+def version(obj: Dict[str, Any], cluster_name: str, group: Optional[int], member_names: List[str]) -> None:
     """Process ``version`` command of ``patronictl`` utility.
 
     Show version of:
@@ -2168,6 +2180,7 @@ def version(cluster_name: str, group: Optional[int], member_names: List[str]) ->
         * ``patroni`` on all members of the cluster;
         * ``PostgreSQL`` on all members of the cluster.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should get members from. Refer to the module note for more details.
     :param member_names: filter which members we should get version information from.
@@ -2178,8 +2191,8 @@ def version(cluster_name: str, group: Optional[int], member_names: List[str]) ->
         return
 
     click.echo("")
-    cluster = get_dcs(cluster_name, group).get_cluster()
+    cluster = get_dcs(obj, cluster_name, group).get_cluster()
-    for m in get_all_members(cluster, group, 'any'):
+    for m in get_all_members(obj, cluster, group, 'any'):
         if m.api_url:
             if not member_names or m.name in member_names:
                 try:
@@ -2197,7 +2210,8 @@ def version(cluster_name: str, group: Optional[int], member_names: List[str]) ->
 @arg_cluster_name
 @option_default_citus_group
 @option_format
-def history(cluster_name: str, group: Optional[int], fmt: str) -> None:
+@click.pass_obj
+def history(obj: Dict[str, Any], cluster_name: str, group: Optional[int], fmt: str) -> None:
     """Process ``history`` command of ``patronictl`` utility.
 
     Show the history of failover/switchover events in the cluster.
@@ -2209,11 +2223,12 @@ def history(cluster_name: str, group: Optional[int], fmt: str) -> None:
         * ``Timestamp``: timestamp when the event occurred;
         * ``New Leader``: the Postgres node that was promoted during the event.
 
+    :param obj: Patroni configuration.
     :param cluster_name: name of the Patroni cluster.
     :param group: filter which Citus group we should get events from. Refer to the module note for more details.
     :param fmt: the output table printing format. See :func:`print_output` for available options.
     """
-    cluster = get_dcs(cluster_name, group).get_cluster()
+    cluster = get_dcs(obj, cluster_name, group).get_cluster()
     cluster_history = cluster.history.lines if cluster.history else []
     history: List[List[Any]] = list(map(list, cluster_history))
     table_header_row = ['TL', 'LSN', 'Reason', 'Timestamp', 'New Leader']

patroni/dcs/__init__.py

@@ -1,22 +1,26 @@
 """Abstract classes for Distributed Configuration Store."""
 import abc
 import datetime
+import importlib
+import inspect
 import json
 import logging
+import os
+import pkgutil
 import re
+import sys
 import time
 from collections import defaultdict
 from copy import deepcopy
 from random import randint
 from threading import Event, Lock
-from typing import Any, Callable, Collection, Dict, Iterator, List, \
+from types import ModuleType
-    NamedTuple, Optional, Tuple, Type, TYPE_CHECKING, Union
+from typing import Any, Callable, Collection, Dict, List, NamedTuple, Optional, Set, Tuple, Union, TYPE_CHECKING, \
+    Type, Iterator
 from urllib.parse import urlparse, urlunparse, parse_qsl
 
 import dateutil.parser
 
-from .. import global_config
-from ..dynamic_loader import iter_classes, iter_modules
 from ..exceptions import PatroniFatalException
 from ..utils import deep_compare, uri
 from ..tags import Tags
@@ -24,10 +28,10 @@ from ..utils import parse_int
 
 if TYPE_CHECKING:  # pragma: no cover
     from ..config import Config
-    from ..postgresql import Postgresql
-    from ..postgresql.mpp import AbstractMPP
 
 SLOT_ADVANCE_AVAILABLE_VERSION = 110000
+CITUS_COORDINATOR_GROUP_ID = 0
+citus_group_re = re.compile('^(0|[1-9][0-9]*)$')
 slot_name_re = re.compile('^[a-z0-9_]{1,63}$')
 logger = logging.getLogger(__name__)
 
@@ -83,9 +87,28 @@ def parse_connection_string(value: str) -> Tuple[str, Union[str, None]]:
 def dcs_modules() -> List[str]:
     """Get names of DCS modules, depending on execution environment.
 
+    .. note::
+        If being packaged with PyInstaller, modules aren't discoverable dynamically by scanning source directory because
+        :class:`importlib.machinery.FrozenImporter` doesn't implement :func:`iter_modules`. But it is still possible to
+        find all potential DCS modules by iterating through ``toc``, which contains list of all "frozen" resources.
+
     :returns: list of known module names with absolute python module path namespace, e.g. ``patroni.dcs.etcd``.
     """
-    return iter_modules(__package__)
+    dcs_dirname = os.path.dirname(__file__)
+    module_prefix = __package__ + '.'
+
+    if getattr(sys, 'frozen', False):
+        toc: Set[str] = set()
+        # dcs_dirname may contain a dot, which causes pkgutil.iter_importers()
+        # to misinterpret the path as a package name. This can be avoided
+        # altogether by not passing a path at all, because PyInstaller's
+        # FrozenImporter is a singleton and registered as top-level finder.
+        for importer in pkgutil.iter_importers():
+            if hasattr(importer, 'toc'):
+                toc |= getattr(importer, 'toc')
+        return [module for module in toc if module.startswith(module_prefix) and module.count('.') == 2]
+
+    return [module_prefix + name for _, name, is_pkg in pkgutil.iter_modules([dcs_dirname]) if not is_pkg]
 
 
 def iter_dcs_classes(
@@ -99,16 +122,44 @@ def iter_dcs_classes(
     :param config: configuration information with possible DCS names as keys. If given, only attempt to import DCS
                    modules defined in the configuration. Else, if ``None``, attempt to import any supported DCS module.
 
-    :returns: an iterator of tuples, each containing the module ``name`` and the imported DCS class object.
+    :yields: a tuple containing the module ``name`` and the imported DCS class object.
     """
-    return iter_classes(__package__, AbstractDCS, config)
+    for mod_name in dcs_modules():
+        name = mod_name.rpartition('.')[2]
+        if config is None or name in config:
+
+            try:
+                module = importlib.import_module(mod_name)
+                dcs_module = find_dcs_class_in_module(module)
+                if dcs_module:
+                    yield name, dcs_module
+
+            except ImportError:
+                logger.log(logging.DEBUG if config is not None else logging.INFO,
+                           'Failed to import %s', mod_name)
+
+
+def find_dcs_class_in_module(module: ModuleType) -> Optional[Type['AbstractDCS']]:
+    """Try to find the implementation of :class:`AbstractDCS` interface in *module* matching the *module* name.
+
+    :param module: Imported DCS module.
+
+    :returns: class with a name matching the name of *module* that implements :class:`AbstractDCS` or ``None`` if not
+              found.
+    """
+    module_name = module.__name__.rpartition('.')[2]
+    return next(
+        (obj for obj_name, obj in module.__dict__.items()
+         if (obj_name.lower() == module_name
+             and inspect.isclass(obj) and issubclass(obj, AbstractDCS))),
+        None)
 
 
 def get_dcs(config: Union['Config', Dict[str, Any]]) -> 'AbstractDCS':
     """Attempt to load a Distributed Configuration Store from known available implementations.
 
     .. note::
-        Using the list of available DCS classes returned by :func:`iter_classes` attempt to dynamically
+        Using the list of available DCS classes returned by :func:`iter_dcs_classes` attempt to dynamically
         instantiate the class that implements a DCS using the abstract class :class:`AbstractDCS`.
 
         Basic top-level configuration parameters retrieved from *config* are propagated to the DCS specific config
@@ -129,13 +180,14 @@ def get_dcs(config: Union['Config', Dict[str, Any]]) -> 'AbstractDCS':
             p: config[p] for p in ('namespace', 'name', 'scope', 'loop_wait',
                                    'patronictl', 'ttl', 'retry_timeout')
             if p in config})
+        # From citus section we only need "group" parameter, but will propagate everything just in case.
+        if isinstance(config.get('citus'), dict):
+            config[name].update(config['citus'])
+        return dcs_class(config[name])
 
-        from patroni.postgresql.mpp import get_mpp
+    raise PatroniFatalException(
-        return dcs_class(config[name], get_mpp(config))
+        f"Can not find suitable configuration of distributed configuration store\n"
-
+        f"Available implementations: {', '.join(sorted([n for n, _ in iter_dcs_classes()]))}")
-    available_implementations = ', '.join(sorted([n for n, _ in iter_dcs_classes()]))
-    raise PatroniFatalException("Can not find suitable configuration of distributed configuration store\n"
-                                f"Available implementations: {available_implementations}")
 
 
 _Version = Union[int, str]
@@ -538,6 +590,24 @@ class ClusterConfig(NamedTuple):
             modify_version = 0
         return ClusterConfig(version, data, version if modify_version is None else modify_version)
 
+    @property
+    def permanent_slots(self) -> Dict[str, Any]:
+        """Dictionary of permanent slots information looked up from :attr:`~ClusterConfig.data`."""
+        return (self.data.get('permanent_replication_slots')
+                or self.data.get('permanent_slots')
+                or self.data.get('slots')
+                or {})
+
+    @property
+    def ignore_slots_matchers(self) -> List[Dict[str, Any]]:
+        """The value for ``ignore_slots`` from :attr:`~ClusterConfig.data` if defined or an empty list."""
+        return self.data.get('ignore_slots') or []
+
+    @property
+    def max_timelines_history(self) -> int:
+        """The value for ``max_timelines_history`` from :attr:`~ClusterConfig.data` if defined or ``0``."""
+        return self.data.get('max_timelines_history', 0)
+
 
 class SyncState(NamedTuple):
     """Immutable object (namedtuple) which represents last observed synchronous replication state.
@@ -556,7 +626,7 @@ class SyncState(NamedTuple):
         """Factory method to parse *value* as synchronisation state information.
 
         :param version: optional *version* number for the object.
-        :param value: (optionally JSON serialised) synchronisation state information
+        :param value: (optionally JSON serialised) sychronisation state information
 
         :returns: constructed :class:`SyncState` object.
 
@@ -782,7 +852,7 @@ class Cluster(NamedTuple('Cluster',
                           ('history', Optional[TimelineHistory]),
                           ('failsafe', Optional[Dict[str, str]]),
                           ('workers', Dict[int, 'Cluster'])])):
-    """Immutable object (namedtuple) which represents PostgreSQL or MPP cluster.
+    """Immutable object (namedtuple) which represents PostgreSQL or Citus cluster.
 
     .. note::
         We are using an old-style attribute declaration here because otherwise it is not possible to override `__new__`
@@ -799,8 +869,8 @@ class Cluster(NamedTuple('Cluster',
     :ivar sync: reference to :class:`SyncState` object, last observed synchronous replication state.
     :ivar history: reference to `TimelineHistory` object.
     :ivar failsafe: failsafe topology. Node is allowed to become the leader only if its name is found in this list.
-    :ivar workers: dictionary of workers of the MPP cluster, optional. Each key representing the group and the
+    :ivar workers: dictionary of workers of the Citus cluster, optional. Each key is an :class:`int` representing
-                   corresponding value is a :class:`Cluster` instance.
+                   the group, and the corresponding value is a :class:`Cluster` instance.
     """
 
     def __new__(cls, *args: Any, **kwargs: Any):
@@ -926,7 +996,7 @@ class Cluster(NamedTuple('Cluster',
     @property
     def __permanent_slots(self) -> Dict[str, Union[Dict[str, Any], Any]]:
         """Dictionary of permanent replication slots with their known LSN."""
-        ret: Dict[str, Union[Dict[str, Any], Any]] = global_config.permanent_slots
+        ret: Dict[str, Union[Dict[str, Any], Any]] = deepcopy(self.config.permanent_slots if self.config else {})
 
         members: Dict[str, int] = {slot_name_from_member_name(m.name): m.lsn or 0 for m in self.members}
         slots: Dict[str, int] = {k: parse_int(v) or 0 for k, v in (self.slots or {}).items()}
@@ -955,29 +1025,36 @@ class Cluster(NamedTuple('Cluster',
         """Dictionary of permanent ``logical`` replication slots."""
         return {name: value for name, value in self.__permanent_slots.items() if self.is_logical_slot(value)}
 
-    def get_replication_slots(self, postgresql: 'Postgresql', member: Tags, *,
+    @property
-                              role: Optional[str] = None, show_error: bool = False) -> Dict[str, Dict[str, Any]]:
+    def use_slots(self) -> bool:
+        """``True`` if cluster is configured to use replication slots."""
+        return bool(self.config and (self.config.data.get('postgresql') or {}).get('use_slots', True))
+
+    def get_replication_slots(self, my_name: str, role: str, nofailover: bool, major_version: int, *,
+                              is_standby_cluster: bool = False, show_error: bool = False) -> Dict[str, Dict[str, Any]]:
         """Lookup configured slot names in the DCS, report issues found and merge with permanent slots.
 
         Will log an error if:
 
             * Any logical slots are disabled, due to version compatibility, and *show_error* is ``True``.
 
-        :param postgresql: reference to :class:`Postgresql` object.
+        :param my_name: name of this node.
-        :param member: reference to an object implementing :class:`Tags` interface.
+        :param role: role of this node.
-        :param role: role of the node, if not set will be taken from *postgresql*.
+        :param nofailover: ``True`` if this node is tagged to not be a failover candidate.
+        :param major_version: postgresql major version.
+        :param is_standby_cluster: ``True`` if it is known that this is a standby cluster. We pass the value from
+                                   the outside because we want to protect from the ``/config`` key removal.
         :param show_error: if ``True`` report error if any disabled logical slots or conflicting slot names are found.
 
         :returns: final dictionary of slot names, after merging with permanent slots and performing sanity checks.
         """
-        name = member.name if isinstance(member, Member) else postgresql.name
+        slots: Dict[str, Dict[str, str]] = self._get_members_slots(my_name, role)
-        role = role or postgresql.role
+        permanent_slots: Dict[str, Any] = self._get_permanent_slots(is_standby_cluster=is_standby_cluster,
-
+                                                                    role=role, nofailover=nofailover,
-        slots: Dict[str, Dict[str, str]] = self._get_members_slots(name, role)
+                                                                    major_version=major_version)
-        permanent_slots: Dict[str, Any] = self._get_permanent_slots(postgresql, member, role)
 
         disabled_permanent_logical_slots: List[str] = self._merge_permanent_slots(
-            slots, permanent_slots, name, postgresql.major_version)
+            slots, permanent_slots, my_name, major_version)
 
         if disabled_permanent_logical_slots and show_error:
             logger.error("Permanent logical replication slots supported by Patroni only starting from PostgreSQL 11. "
@@ -985,7 +1062,7 @@ class Cluster(NamedTuple('Cluster',
 
         return slots
 
-    def _merge_permanent_slots(self, slots: Dict[str, Dict[str, str]], permanent_slots: Dict[str, Any], name: str,
+    def _merge_permanent_slots(self, slots: Dict[str, Dict[str, str]], permanent_slots: Dict[str, Any], my_name: str,
                                major_version: int) -> List[str]:
         """Merge replication *slots* for members with *permanent_slots*.
 
@@ -995,7 +1072,7 @@ class Cluster(NamedTuple('Cluster',
         Type is assumed to be ``physical`` if there are no attributes stored as the slot value.
 
         :param slots: Slot names with existing attributes if known.
-        :param name: name of this node.
+        :param my_name: name of this node.
         :param permanent_slots: dictionary containing slot name key and slot information values.
         :param major_version: postgresql major version.
 
@@ -1003,9 +1080,9 @@ class Cluster(NamedTuple('Cluster',
         """
         disabled_permanent_logical_slots: List[str] = []
 
-        for slot_name, value in permanent_slots.items():
+        for name, value in permanent_slots.items():
-            if not slot_name_re.match(slot_name):
+            if not slot_name_re.match(name):
-                logger.error("Invalid permanent replication slot name '%s'", slot_name)
+                logger.error("Invalid permanent replication slot name '%s'", name)
                 logger.error("Slot name may only contain lower case letters, numbers, and the underscore chars")
                 continue
 
@@ -1016,24 +1093,25 @@ class Cluster(NamedTuple('Cluster',
 
                 if value['type'] == 'physical':
                     # Don't try to create permanent physical replication slot for yourself
-                    if slot_name != slot_name_from_member_name(name):
+                    if name != slot_name_from_member_name(my_name):
-                        slots[slot_name] = value
+                        slots[name] = value
                     continue
 
                 if self.is_logical_slot(value):
                     if major_version < SLOT_ADVANCE_AVAILABLE_VERSION:
-                        disabled_permanent_logical_slots.append(slot_name)
+                        disabled_permanent_logical_slots.append(name)
-                    elif slot_name in slots:
+                    elif name in slots:
                         logger.error("Permanent logical replication slot {'%s': %s} is conflicting with"
-                                     " physical replication slot for cluster member", slot_name, value)
+                                     " physical replication slot for cluster member", name, value)
                     else:
-                        slots[slot_name] = value
+                        slots[name] = value
                     continue
 
-            logger.error("Bad value for slot '%s' in permanent_slots: %s", slot_name, permanent_slots[slot_name])
+            logger.error("Bad value for slot '%s' in permanent_slots: %s", name, permanent_slots[name])
         return disabled_permanent_logical_slots
 
-    def _get_permanent_slots(self, postgresql: 'Postgresql', tags: Tags, role: str) -> Dict[str, Any]:
+    def _get_permanent_slots(self, *, is_standby_cluster: bool, role: str,
+                             nofailover: bool, major_version: int) -> Dict[str, Any]:
         """Get configured permanent replication slots.
 
         .. note::
@@ -1045,23 +1123,25 @@ class Cluster(NamedTuple('Cluster',
             The returned dictionary for a non-standby cluster always contains permanent logical replication slots in
             order to show a warning if they are not supported by PostgreSQL before v11.
 
-        :param postgresql: reference to :class:`Postgresql` object.
+        :param is_standby_cluster: ``True`` if it is known that this is a standby cluster. We pass the value from
-        :param tags: reference to an object implementing :class:`Tags` interface.
+                                   the outside because we want to protect from the ``/config`` key removal.
-        :param role: role of the node -- ``primary``, ``standby_leader`` or ``replica``.
+        :param role: role of this node -- ``primary``, ``standby_leader`` or ``replica``.
+        :param nofailover: ``True`` if this node is tagged to not be a failover candidate.
+        :param major_version: postgresql major version.
 
         :returns: dictionary of permanent slot names mapped to attributes.
         """
-        if not global_config.use_slots or tags.nofailover:
+        if not self.use_slots or nofailover:
             return {}
 
-        if global_config.is_standby_cluster:
+        if is_standby_cluster:
             return self.__permanent_physical_slots \
-                if postgresql.major_version >= SLOT_ADVANCE_AVAILABLE_VERSION or role == 'standby_leader' else {}
+                if major_version >= SLOT_ADVANCE_AVAILABLE_VERSION or role == 'standby_leader' else {}
 
-        return self.__permanent_slots if postgresql.major_version >= SLOT_ADVANCE_AVAILABLE_VERSION\
+        return self.__permanent_slots if major_version >= SLOT_ADVANCE_AVAILABLE_VERSION\
             or role in ('master', 'primary') else self.__permanent_logical_slots
 
-    def _get_members_slots(self, name: str, role: str) -> Dict[str, Dict[str, str]]:
+    def _get_members_slots(self, my_name: str, role: str) -> Dict[str, Dict[str, str]]:
         """Get physical replication slots configuration for members that sourcing from this node.
 
         If the ``replicatefrom`` tag is set on the member - we should not create the replication slot for it on
@@ -1073,25 +1153,25 @@ class Cluster(NamedTuple('Cluster',
 
             * Conflicting slot names between members are found
 
-        :param name: name of this node.
+        :param my_name: name of this node.
         :param role: role of this node, if this is a ``primary`` or ``standby_leader`` return list of members
                      replicating from this node. If not then return a list of members replicating as cascaded
                      replicas from this node.
 
         :returns: dictionary of physical replication slots that should exist on a given node.
         """
-        if not global_config.use_slots:
+        if not self.use_slots:
             return {}
 
         # we always want to exclude the member with our name from the list
-        members = filter(lambda m: m.name != name, self.members)
+        members = filter(lambda m: m.name != my_name, self.members)
 
         if role in ('master', 'primary', 'standby_leader'):
             members = [m for m in members if m.replicatefrom is None
-                       or m.replicatefrom == name or not self.has_member(m.replicatefrom)]
+                       or m.replicatefrom == my_name or not self.has_member(m.replicatefrom)]
         else:
             # only manage slots for replicas that replicate from this one, except for the leader among them
-            members = [m for m in members if m.replicatefrom == name and m.name != self.leader_name]
+            members = [m for m in members if m.replicatefrom == my_name and m.name != self.leader_name]
 
         slots = {slot_name_from_member_name(m.name): {'type': 'physical'} for m in members}
         if len(slots) < len(members):
@@ -1104,76 +1184,84 @@ class Cluster(NamedTuple('Cluster',
                                    for k, v in slot_conflicts.items() if len(v) > 1))
         return slots
 
-    def has_permanent_slots(self, postgresql: 'Postgresql', member: Tags) -> bool:
+    def has_permanent_slots(self, my_name: str, *, is_standby_cluster: bool = False, nofailover: bool = False,
-        """Check if our node has permanent replication slots configured.
+                            major_version: int = SLOT_ADVANCE_AVAILABLE_VERSION) -> bool:
+        """Check if the given member node has permanent replication slots configured.
 
-        :param postgresql: reference to :class:`Postgresql` object.
+        :param my_name: name of the member node to check.
-        :param member: reference to an object implementing :class:`Tags` interface for
+        :param is_standby_cluster: ``True`` if it is known that this is a standby cluster. We pass the value from
-                       the node that we are checking permanent logical replication slots for.
+                                   the outside because we want to protect from the ``/config`` key removal.
+        :param nofailover: ``True`` if this node is tagged to not be a failover candidate.
+        :param major_version: postgresql major version.
 
         :returns: ``True`` if there are permanent replication slots configured, otherwise ``False``.
         """
         role = 'replica'
-        members_slots: Dict[str, Dict[str, str]] = self._get_members_slots(postgresql.name, role)
+        members_slots: Dict[str, Dict[str, str]] = self._get_members_slots(my_name, role)
-        permanent_slots: Dict[str, Any] = self._get_permanent_slots(postgresql, member, role)
+        permanent_slots: Dict[str, Any] = self._get_permanent_slots(is_standby_cluster=is_standby_cluster,
+                                                                    role=role, nofailover=nofailover,
+                                                                    major_version=major_version)
         slots = deepcopy(members_slots)
-        self._merge_permanent_slots(slots, permanent_slots, postgresql.name, postgresql.major_version)
+        self._merge_permanent_slots(slots, permanent_slots, my_name, major_version)
         return len(slots) > len(members_slots) or any(self.is_physical_slot(v) for v in permanent_slots.values())
 
-    def filter_permanent_slots(self, postgresql: 'Postgresql', slots: Dict[str, int]) -> Dict[str, int]:
+    def filter_permanent_slots(self, slots: Dict[str, int], is_standby_cluster: bool,
+                               major_version: int) -> Dict[str, int]:
         """Filter out all non-permanent slots from provided *slots* dict.
 
-        :param postgresql: reference to :class:`Postgresql` object.
+        :param slots: slot names with LSN values
-        :param slots: slot names with LSN values.
+        :param is_standby_cluster: ``True`` if it is known that this is a standby cluster. We pass the value from
+                                   the outside because we want to protect from the ``/config`` key removal.
+        :param major_version: postgresql major version.
 
         :returns: a :class:`dict` object that contains only slots that are known to be permanent.
         """
-        if postgresql.major_version < SLOT_ADVANCE_AVAILABLE_VERSION:
+        if major_version < SLOT_ADVANCE_AVAILABLE_VERSION:
             return {}  # for legacy PostgreSQL we don't support permanent slots on standby nodes
 
-        permanent_slots: Dict[str, Any] = self._get_permanent_slots(postgresql, RemoteMember('', {}), 'replica')
+        permanent_slots: Dict[str, Any] = self._get_permanent_slots(is_standby_cluster=is_standby_cluster,
+                                                                    role='replica',
+                                                                    nofailover=False,
+                                                                    major_version=major_version)
         members_slots = {slot_name_from_member_name(m.name) for m in self.members}
 
         return {name: value for name, value in slots.items() if name in permanent_slots
                 and (self.is_physical_slot(permanent_slots[name])
                      or self.is_logical_slot(permanent_slots[name]) and name not in members_slots)}
 
-    def _has_permanent_logical_slots(self, postgresql: 'Postgresql', member: Tags) -> bool:
+    def _has_permanent_logical_slots(self, my_name: str, nofailover: bool) -> bool:
         """Check if the given member node has permanent ``logical`` replication slots configured.
 
-        :param postgresql: reference to a :class:`Postgresql` object.
+        :param my_name: name of the member node to check.
-        :param member: reference to an object implementing :class:`Tags` interface for
+        :param nofailover: ``True`` if this node is tagged to not be a failover candidate.
-                       the node that we are checking permanent logical replication slots for.
 
         :returns: ``True`` if any detected replications slots are ``logical``, otherwise ``False``.
         """
-        slots = self.get_replication_slots(postgresql, member, role='replica').values()
+        slots = self.get_replication_slots(my_name, 'replica', nofailover, SLOT_ADVANCE_AVAILABLE_VERSION).values()
         return any(v for v in slots if v.get("type") == "logical")
 
-    def should_enforce_hot_standby_feedback(self, postgresql: 'Postgresql', member: Tags) -> bool:
+    def should_enforce_hot_standby_feedback(self, my_name: str, nofailover: bool) -> bool:
         """Determine whether ``hot_standby_feedback`` should be enabled for the given member.
 
         The ``hot_standby_feedback`` must be enabled if the current replica has ``logical`` slots,
         or it is working as a cascading replica for the other node that has ``logical`` slots.
 
-        :param postgresql: reference to a :class:`Postgresql` object.
+        :param my_name: name of the member node to check.
-        :param member: reference to an object implementing :class:`Tags` interface for
+        :param nofailover: ``True`` if this node is tagged to not be a failover candidate.
-                       the node that we are checking permanent logical replication slots for.
 
         :returns: ``True`` if this node or any member replicating from this node has
                   permanent logical slots, otherwise ``False``.
         """
-        if self._has_permanent_logical_slots(postgresql, member):
+        if self._has_permanent_logical_slots(my_name, nofailover):
             return True
 
-        if global_config.use_slots:
+        if self.use_slots:
-            name = member.name if isinstance(member, Member) else postgresql.name
+            members = [m for m in self.members if m.replicatefrom == my_name and m.name != self.leader_name]
-            members = [m for m in self.members if m.replicatefrom == name and m.name != self.leader_name]
+            return any(self.should_enforce_hot_standby_feedback(m.name, m.nofailover) for m in members)
-            return any(self.should_enforce_hot_standby_feedback(postgresql, m) for m in members)
         return False
 
-    def get_slot_name_on_primary(self, name: str, tags: Tags) -> str:
+    def get_my_slot_name_on_primary(self, my_name: str, replicatefrom: Optional[str]) -> str:
-        """Get the name of physical replication slot for this node on the primary.
+        """Canonical slot name for physical replication.
 
         .. note::
             P <-- I <-- L
@@ -1181,14 +1269,14 @@ class Cluster(NamedTuple('Cluster',
             In case of cascading replication we have to check not our physical slot, but slot of the replica that
             connects us to the primary.
 
-        :param name: name of the member node to check.
+        :param my_name: the member node name that is replicating.
-        :param tags: reference to an object implementing :class:`Tags` interface.
+        :param replicatefrom: the Intermediate member name that is configured to replicate for cascading replication.
 
-        :returns: the slot name on the primary that is in use for physical replication on this node.
+        :returns: The slot name that is in use for physical replication on this no`de.
         """
-        replicatefrom = self.get_member(tags.replicatefrom, False) if tags.replicatefrom else None
+        m = self.get_member(replicatefrom, False) if replicatefrom else None
-        return self.get_slot_name_on_primary(replicatefrom.name, replicatefrom) \
+        return self.get_my_slot_name_on_primary(m.name, m.replicatefrom) \
-            if isinstance(replicatefrom, Member) else slot_name_from_member_name(name)
+            if isinstance(m, Member) else slot_name_from_member_name(my_name)
 
     @property
     def timeline(self) -> int:
@@ -1263,11 +1351,11 @@ class AbstractDCS(abc.ABC):
     Functional methods that are critical in their timing, required to complete within ``retry_timeout`` period in order
     to prevent the DCS considered inaccessible, each perform construction of complex data objects:
 
-        * :meth:`~AbstractDCS._postgresql_cluster_loader`:
+        * :meth:`~AbstractDCS._cluster_loader`:
             method which processes the structure of data stored in the DCS used to build the :class:`Cluster` object
             with all relevant associated data.
-        * :meth:`~AbstractDCS._mpp_cluster_loader`:
+        * :meth:`~AbstractDCS._citus_cluster_loader`:
-            Similar to above but specifically representing MPP group and workers information.
+            Similar to above but specifically representing Citus group and workers information.
         * :meth:`~AbstractDCS._load_cluster`:
             main method for calling specific ``loader`` method to build the :class:`Cluster` object representing the
             state and topology of the cluster.
@@ -1336,15 +1424,15 @@ class AbstractDCS(abc.ABC):
     _SYNC = 'sync'
     _FAILSAFE = 'failsafe'
 
-    def __init__(self, config: Dict[str, Any], mpp: 'AbstractMPP') -> None:
+    def __init__(self, config: Dict[str, Any]) -> None:
-        """Prepare DCS paths, MPP object, initial values for state information and processing dependencies.
+        """Prepare DCS paths, Citus group ID, initial values for state information and processing dependencies.
 
         :ivar config: :class:`dict`, reference to config section of selected DCS.
                       i.e.: ``zookeeper`` for zookeeper, ``etcd`` for etcd, etc...
         """
-        self._mpp = mpp
         self._name = config['name']
         self._base_path = re.sub('/+', '/', '/'.join(['', config.get('namespace', 'service'), config['scope']]))
+        self._citus_group = str(config['group']) if isinstance(config.get('group'), int) else None
         self._set_loop_wait(config.get('loop_wait', 10))
 
         self._ctl = bool(config.get('patronictl', False))
@@ -1357,11 +1445,6 @@ class AbstractDCS(abc.ABC):
         self._last_failsafe: Optional[Dict[str, str]] = {}
         self.event = Event()
 
-    @property
-    def mpp(self) -> 'AbstractMPP':
-        """Get the effective underlying MPP, if any has been configured."""
-        return self._mpp
-
     def client_path(self, path: str) -> str:
         """Construct the absolute key name from appropriate parts for the DCS type.
 
@@ -1370,8 +1453,8 @@ class AbstractDCS(abc.ABC):
         :returns: absolute key name for the current Patroni cluster.
         """
         components = [self._base_path]
-        if self._mpp.is_enabled():
+        if self._citus_group:
-            components.append(str(self._mpp.group))
+            components.append(self._citus_group)
         components.append(path.lstrip('/'))
         return '/'.join(components)
 
@@ -1472,21 +1555,22 @@ class AbstractDCS(abc.ABC):
         return self._last_seen
 
     @abc.abstractmethod
-    def _postgresql_cluster_loader(self, path: Any) -> Cluster:
+    def _cluster_loader(self, path: Any) -> Cluster:
-        """Load and build the :class:`Cluster` object from DCS, which represents a single PostgreSQL cluster.
+        """Load and build the :class:`Cluster` object from DCS, which represents a single Patroni or Citus cluster.
 
-        :param path: the path in DCS where to load :class:`Cluster` from.
+        :param path: the path in DCS where to load Cluster(s) from.
 
         :returns: :class:`Cluster` instance.
         """
 
     @abc.abstractmethod
-    def _mpp_cluster_loader(self, path: Any) -> Dict[int, Cluster]:
+    def _citus_cluster_loader(self, path: Any) -> Dict[int, Cluster]:
-        """Load and build all PostgreSQL clusters from a single MPP cluster.
+        """Load and build all Patroni clusters from a single Citus cluster.
 
         :param path: the path in DCS where to load Cluster(s) from.
 
-        :returns: all MPP groups as :class:`dict`, with group IDs as keys and :class:`Cluster` objects as values.
+        :returns: all Citus groups as :class:`dict`, with group IDs as keys and :class:`Cluster` objects as values or a
+                  :class:`Cluster` object representing the coordinator with filled `Cluster.workers` attribute.
         """
 
     @abc.abstractmethod
@@ -1501,14 +1585,13 @@ class AbstractDCS(abc.ABC):
             the :meth:`~AbstractDCS.get_cluster` method.
 
         :param path: the path in DCS where to load Cluster(s) from.
-        :param loader: one of :meth:`~AbstractDCS._postgresql_cluster_loader` or
+        :param loader: one of :meth:`~AbstractDCS._cluster_loader` or :meth:`~AbstractDCS._citus_cluster_loader`.
-                       :meth:`~AbstractDCS._mpp_cluster_loader`.
 
         :raise: :exc:`~DCSError` in case of communication problems with DCS. If the current node was running as a
                 primary and exception raised, instance would be demoted.
         """
 
-    def __get_postgresql_cluster(self, path: Optional[str] = None) -> Cluster:
+    def __get_patroni_cluster(self, path: Optional[str] = None) -> Cluster:
         """Low level method to load a :class:`Cluster` object from DCS.
 
         :param path: optional client path in DCS backend to load from.
@@ -1517,43 +1600,42 @@ class AbstractDCS(abc.ABC):
         """
         if path is None:
             path = self.client_path('')
-        cluster = self._load_cluster(path, self._postgresql_cluster_loader)
+        cluster = self._load_cluster(path, self._cluster_loader)
         if TYPE_CHECKING:  # pragma: no cover
             assert isinstance(cluster, Cluster)
         return cluster
 
-    def is_mpp_coordinator(self) -> bool:
+    def is_citus_coordinator(self) -> bool:
-        """:class:`Cluster` instance has a Coordinator group ID.
+        """:class:`Cluster` instance has a Citus Coordinator group ID.
 
-        :returns: ``True`` if the given node is running as the MPP Coordinator.
+        :returns: ``True`` if the given node is running as Citus Coordinator (``group=0``).
         """
-        return self._mpp.is_coordinator()
+        return self._citus_group == str(CITUS_COORDINATOR_GROUP_ID)
 
-    def get_mpp_coordinator(self) -> Optional[Cluster]:
+    def get_citus_coordinator(self) -> Optional[Cluster]:
-        """Load the PostgreSQL cluster for the MPP Coordinator.
+        """Load the Patroni cluster for the Citus Coordinator.
 
-        .. note::
+          .. note::
-            This method is only executed on the worker nodes to find the coordinator.
+              This method is only executed on the worker nodes (``group!=0``) to find the coordinator.
 
-        :returns: Select :class:`Cluster` instance associated with the MPP Coordinator group ID.
+        :returns: Select :class:`Cluster` instance associated with the Citus Coordinator group ID.
         """
         try:
-            return self.__get_postgresql_cluster(f'{self._base_path}/{self._mpp.coordinator_group_id}/')
+            return self.__get_patroni_cluster(f'{self._base_path}/{CITUS_COORDINATOR_GROUP_ID}/')
         except Exception as e:
-            logger.error('Failed to load %s coordinator cluster from %s: %r',
+            logger.error('Failed to load Citus coordinator cluster from %s: %r', self.__class__.__name__, e)
-                         self._mpp.type, self.__class__.__name__, e)
         return None
 
-    def _get_mpp_cluster(self) -> Cluster:
+    def _get_citus_cluster(self) -> Cluster:
-        """Load MPP cluster from DCS.
+        """Load Citus cluster from DCS.
 
-        :returns: A MPP :class:`Cluster` instance for the coordinator with workers clusters in the `Cluster.workers`
+        :returns: A Citus :class:`Cluster` instance for the coordinator with workers clusters in the `Cluster.workers`
                   dict.
         """
-        groups = self._load_cluster(self._base_path + '/', self._mpp_cluster_loader)
+        groups = self._load_cluster(self._base_path + '/', self._citus_cluster_loader)
         if TYPE_CHECKING:  # pragma: no cover
             assert isinstance(groups, dict)
-        cluster = groups.pop(self._mpp.coordinator_group_id, Cluster.empty())
+        cluster = groups.pop(CITUS_COORDINATOR_GROUP_ID, Cluster.empty())
         cluster.workers.update(groups)
         return cluster
 
@@ -1564,12 +1646,12 @@ class AbstractDCS(abc.ABC):
             Stores copy of time, status and failsafe values for comparison in DCS update decisions.
             Caching is required to avoid overhead placed upon the REST API.
 
-            Returns either a PostgreSQL or MPP implementation of :class:`Cluster` depending on availability.
+            Returns either a Citus or Patroni implementation of :class:`Cluster` depending on availability.
 
         :returns:
         """
         try:
-            cluster = self._get_mpp_cluster() if self.is_mpp_coordinator() else self.__get_postgresql_cluster()
+            cluster = self._get_citus_cluster() if self.is_citus_coordinator() else self.__get_patroni_cluster()
         except Exception:
             self.reset_cluster()
             raise

patroni/dcs/consul.py

@@ -16,9 +16,8 @@ from urllib.parse import urlencode, urlparse, quote
 from typing import Any, Callable, Dict, List, Mapping, NamedTuple, Optional, Union, Tuple, TYPE_CHECKING
 
 from . import AbstractDCS, Cluster, ClusterConfig, Failover, Leader, Member, Status, SyncState, \
-    TimelineHistory, ReturnFalseException, catch_return_false_exception
+    TimelineHistory, ReturnFalseException, catch_return_false_exception, citus_group_re
 from ..exceptions import DCSError
-from ..postgresql.mpp import AbstractMPP
 from ..utils import deep_compare, parse_bool, Retry, RetryFailedError, split_host_port, uri, USER_AGENT
 if TYPE_CHECKING:  # pragma: no cover
     from ..config import Config
@@ -233,8 +232,8 @@ def service_name_from_scope_name(scope_name: str) -> str:
 
 class Consul(AbstractDCS):
 
-    def __init__(self, config: Dict[str, Any], mpp: AbstractMPP) -> None:
+    def __init__(self, config: Dict[str, Any]) -> None:
-        super(Consul, self).__init__(config, mpp)
+        super(Consul, self).__init__(config)
         self._base_path = self._base_path[1:]
         self._scope = config['scope']
         self._session = None
@@ -420,13 +419,7 @@ class Consul(AbstractDCS):
     def _consistency(self) -> str:
         return 'consistent' if self._ctl else self._client.consistency
 
-    def _postgresql_cluster_loader(self, path: str) -> Cluster:
+    def _cluster_loader(self, path: str) -> Cluster:
-        """Load and build the :class:`Cluster` object from DCS, which represents a single PostgreSQL cluster.
-
-        :param path: the path in DCS where to load :class:`Cluster` from.
-
-        :returns: :class:`Cluster` instance.
-        """
         _, results = self.retry(self._client.kv.get, path, recurse=True, consistency=self._consistency)
         if results is None:
             return Cluster.empty()
@@ -437,18 +430,12 @@ class Consul(AbstractDCS):
 
         return self._cluster_from_nodes(nodes)
 
-    def _mpp_cluster_loader(self, path: str) -> Dict[int, Cluster]:
+    def _citus_cluster_loader(self, path: str) -> Dict[int, Cluster]:
-        """Load and build all PostgreSQL clusters from a single MPP cluster.
-
-        :param path: the path in DCS where to load Cluster(s) from.
-
-        :returns: all MPP groups as :class:`dict`, with group IDs as keys and :class:`Cluster` objects as values.
-        """
         _, results = self.retry(self._client.kv.get, path, recurse=True, consistency=self._consistency)
         clusters: Dict[int, Dict[str, Cluster]] = defaultdict(dict)
         for node in results or []:
             key = node['Key'][len(path):].split('/', 1)
-            if len(key) == 2 and self._mpp.group_re.match(key[0]):
+            if len(key) == 2 and citus_group_re.match(key[0]):
                 node['Value'] = (node['Value'] or b'').decode('utf-8')
                 clusters[int(key[0])][key[1]] = node
         return {group: self._cluster_from_nodes(nodes) for group, nodes in clusters.items()}
@@ -679,7 +666,7 @@ class Consul(AbstractDCS):
         if ret:  # We have no other choise, only read after write :(
             if not retry.ensure_deadline(0.5):
                 return False
-            _, ret = self.retry(self._client.kv.get, self.sync_path, consistency='consistent')
+            _, ret = self.retry(self._client.kv.get, self.sync_path)
             if ret and (ret.get('Value') or b'').decode('utf-8') == value:
                 return ret['ModifyIndex']
         return False

patroni/dcs/etcd.py

@@ -22,9 +22,8 @@ from urllib3 import Timeout
 from urllib3.exceptions import HTTPError, ReadTimeoutError, ProtocolError
 
 from . import AbstractDCS, Cluster, ClusterConfig, Failover, Leader, Member, Status, SyncState, \
-    TimelineHistory, ReturnFalseException, catch_return_false_exception
+    TimelineHistory, ReturnFalseException, catch_return_false_exception, citus_group_re
 from ..exceptions import DCSError
-from ..postgresql.mpp import AbstractMPP
 from ..request import get as requests_get
 from ..utils import Retry, RetryFailedError, split_host_port, uri, USER_AGENT
 if TYPE_CHECKING:  # pragma: no cover
@@ -471,9 +470,9 @@ class EtcdClient(AbstractEtcdClientWithFailover):
 
 class AbstractEtcd(AbstractDCS):
 
-    def __init__(self, config: Dict[str, Any], mpp: AbstractMPP, client_cls: Type[AbstractEtcdClientWithFailover],
+    def __init__(self, config: Dict[str, Any], client_cls: Type[AbstractEtcdClientWithFailover],
                  retry_errors_cls: Union[Type[Exception], Tuple[Type[Exception], ...]]) -> None:
-        super(AbstractEtcd, self).__init__(config, mpp)
+        super(AbstractEtcd, self).__init__(config)
         self._retry = Retry(deadline=config['retry_timeout'], max_delay=1, max_tries=-1,
                             retry_exceptions=retry_errors_cls)
         self._ttl = int(config.get('ttl') or 30)
@@ -646,8 +645,8 @@ def catch_etcd_errors(func: Callable[..., Any]) -> Any:
 
 class Etcd(AbstractEtcd):
 
-    def __init__(self, config: Dict[str, Any], mpp: AbstractMPP) -> None:
+    def __init__(self, config: Dict[str, Any]) -> None:
-        super(Etcd, self).__init__(config, mpp, EtcdClient, (etcd.EtcdLeaderElectionInProgress, EtcdRaftInternal))
+        super(Etcd, self).__init__(config, EtcdClient, (etcd.EtcdLeaderElectionInProgress, EtcdRaftInternal))
         self.__do_not_watch = False
 
     @property
@@ -710,13 +709,7 @@ class Etcd(AbstractEtcd):
 
         return Cluster(initialize, config, leader, status, members, failover, sync, history, failsafe)
 
-    def _postgresql_cluster_loader(self, path: str) -> Cluster:
+    def _cluster_loader(self, path: str) -> Cluster:
-        """Load and build the :class:`Cluster` object from DCS, which represents a single PostgreSQL cluster.
-
-        :param path: the path in DCS where to load :class:`Cluster` from.
-
-        :returns: :class:`Cluster` instance.
-        """
         try:
             result = self.retry(self._client.read, path, recursive=True, quorum=self._ctl)
         except etcd.EtcdKeyNotFound:
@@ -724,13 +717,7 @@ class Etcd(AbstractEtcd):
         nodes = {node.key[len(result.key):].lstrip('/'): node for node in result.leaves}
         return self._cluster_from_nodes(result.etcd_index, nodes)
 
-    def _mpp_cluster_loader(self, path: str) -> Dict[int, Cluster]:
+    def _citus_cluster_loader(self, path: str) -> Dict[int, Cluster]:
-        """Load and build all PostgreSQL clusters from a single MPP cluster.
-
-        :param path: the path in DCS where to load Cluster(s) from.
-
-        :returns: all MPP groups as :class:`dict`, with group IDs as keys and :class:`Cluster` objects as values.
-        """
         try:
             result = self.retry(self._client.read, path, recursive=True, quorum=self._ctl)
         except etcd.EtcdKeyNotFound:
@@ -739,7 +726,7 @@ class Etcd(AbstractEtcd):
         clusters: Dict[int, Dict[str, etcd.EtcdResult]] = defaultdict(dict)
         for node in result.leaves:
             key = node.key[len(result.key):].lstrip('/').split('/', 1)
-            if len(key) == 2 and self._mpp.group_re.match(key[0]):
+            if len(key) == 2 and citus_group_re.match(key[0]):
                 clusters[int(key[0])][key[1]] = node
         return {group: self._cluster_from_nodes(result.etcd_index, nodes) for group, nodes in clusters.items()}
 

patroni/dcs/etcd3.py

@@ -16,10 +16,9 @@ from threading import Condition, Lock, Thread
 from typing import Any, Callable, Collection, Dict, Iterator, List, Optional, Tuple, Type, TYPE_CHECKING, Union
 
 from . import ClusterConfig, Cluster, Failover, Leader, Member, Status, SyncState, \
-    TimelineHistory, catch_return_false_exception
+    TimelineHistory, catch_return_false_exception, citus_group_re
 from .etcd import AbstractEtcdClientWithFailover, AbstractEtcd, catch_etcd_errors, DnsCachingResolver, Retry
 from ..exceptions import DCSError, PatroniException
-from ..postgresql.mpp import AbstractMPP
 from ..utils import deep_compare, enable_keepalive, iter_response_objects, RetryFailedError, USER_AGENT
 
 logger = logging.getLogger(__name__)
@@ -672,9 +671,8 @@ class PatroniEtcd3Client(Etcd3Client):
 
 class Etcd3(AbstractEtcd):
 
-    def __init__(self, config: Dict[str, Any], mpp: AbstractMPP) -> None:
+    def __init__(self, config: Dict[str, Any]) -> None:
-        super(Etcd3, self).__init__(config, mpp, PatroniEtcd3Client,
+        super(Etcd3, self).__init__(config, PatroniEtcd3Client, (DeadlineExceeded, Unavailable, FailedPrecondition))
-                                    (DeadlineExceeded, Unavailable, FailedPrecondition))
         self.__do_not_watch = False
         self._lease = None
         self._last_lease_refresh = 0
@@ -733,11 +731,7 @@ class Etcd3(AbstractEtcd):
 
     @property
     def cluster_prefix(self) -> str:
-        """Construct the cluster prefix for the cluster.
+        return self._base_path + '/' if self.is_citus_coordinator() else self.client_path('')
-
-        :returns: path in the DCS under which we store information about this Patroni cluster.
-        """
-        return self._base_path + '/' if self.is_mpp_coordinator() else self.client_path('')
 
     @staticmethod
     def member(node: Dict[str, str]) -> Member:
@@ -791,30 +785,18 @@ class Etcd3(AbstractEtcd):
 
         return Cluster(initialize, config, leader, status, members, failover, sync, history, failsafe)
 
-    def _postgresql_cluster_loader(self, path: str) -> Cluster:
+    def _cluster_loader(self, path: str) -> Cluster:
-        """Load and build the :class:`Cluster` object from DCS, which represents a single PostgreSQL cluster.
-
-        :param path: the path in DCS where to load :class:`Cluster` from.
-
-        :returns: :class:`Cluster` instance.
-        """
         nodes = {node['key'][len(path):]: node
                  for node in self._client.get_cluster(path)
                  if node['key'].startswith(path)}
         return self._cluster_from_nodes(nodes)
 
-    def _mpp_cluster_loader(self, path: str) -> Dict[int, Cluster]:
+    def _citus_cluster_loader(self, path: str) -> Dict[int, Cluster]:
-        """Load and build all PostgreSQL clusters from a single MPP cluster.
-
-        :param path: the path in DCS where to load Cluster(s) from.
-
-        :returns: all MPP groups as :class:`dict`, with group IDs as keys and :class:`Cluster` objects as values.
-        """
         clusters: Dict[int, Dict[str, Dict[str, Any]]] = defaultdict(dict)
         path = self._base_path + '/'
         for node in self._client.get_cluster(path):
             key = node['key'][len(path):].split('/', 1)
-            if len(key) == 2 and self._mpp.group_re.match(key[0]):
+            if len(key) == 2 and citus_group_re.match(key[0]):
                 clusters[int(key[0])][key[1]] = node
         return {group: self._cluster_from_nodes(nodes) for group, nodes in clusters.items()}
 

patroni/dcs/exhibitor.py

@@ -7,7 +7,6 @@ from typing import Any, Callable, Dict, List, Union
 
 from . import Cluster
 from .zookeeper import ZooKeeper
-from ..postgresql.mpp import AbstractMPP
 from ..request import get as requests_get
 from ..utils import uri
 
@@ -67,10 +66,10 @@ class ExhibitorEnsembleProvider(object):
 
 class Exhibitor(ZooKeeper):
 
-    def __init__(self, config: Dict[str, Any], mpp: AbstractMPP) -> None:
+    def __init__(self, config: Dict[str, Any]) -> None:
         interval = config.get('poll_interval', 300)
         self._ensemble_provider = ExhibitorEnsembleProvider(config['hosts'], config['port'], poll_interval=interval)
-        super(Exhibitor, self).__init__({**config, 'hosts': self._ensemble_provider.zookeeper_hosts}, mpp)
+        super(Exhibitor, self).__init__({**config, 'hosts': self._ensemble_provider.zookeeper_hosts})
 
     def _load_cluster(
             self, path: str, loader: Callable[[str], Union[Cluster, Dict[int, Cluster]]]

patroni/dcs/kubernetes.py

@@ -19,9 +19,9 @@ from urllib3.exceptions import HTTPError
 from threading import Condition, Lock, Thread
 from typing import Any, Callable, Collection, Dict, List, Optional, Tuple, Type, Union, TYPE_CHECKING
 
-from . import AbstractDCS, Cluster, ClusterConfig, Failover, Leader, Member, Status, SyncState, TimelineHistory
+from . import AbstractDCS, Cluster, ClusterConfig, Failover, Leader, Member, Status, SyncState, \
+    TimelineHistory, CITUS_COORDINATOR_GROUP_ID, citus_group_re
 from ..exceptions import DCSError
-from ..postgresql.mpp import AbstractMPP
 from ..utils import deep_compare, iter_response_objects, keepalive_socket_options, \
     Retry, RetryFailedError, tzutc, uri, USER_AGENT
 if TYPE_CHECKING:  # pragma: no cover
@@ -746,7 +746,9 @@ class ObjectCache(Thread):
 
 class Kubernetes(AbstractDCS):
 
-    def __init__(self, config: Dict[str, Any], mpp: AbstractMPP) -> None:
+    _CITUS_LABEL = 'citus-group'
+
+    def __init__(self, config: Dict[str, Any]) -> None:
         self._labels = deepcopy(config['labels'])
         self._labels[config.get('scope_label', 'cluster-name')] = config['scope']
         self._label_selector = ','.join('{0}={1}'.format(k, v) for k, v in self._labels.items())
@@ -757,9 +759,9 @@ class Kubernetes(AbstractDCS):
         self._standby_leader_label_value = config.get('standby_leader_label_value', 'master')
         self._tmp_role_label = config.get('tmp_role_label')
         self._ca_certs = os.environ.get('PATRONI_KUBERNETES_CACERT', config.get('cacert')) or SERVICE_CERT_FILENAME
-        super(Kubernetes, self).__init__({**config, 'namespace': ''}, mpp)
+        super(Kubernetes, self).__init__({**config, 'namespace': ''})
-        if self._mpp.is_enabled():
+        if self._citus_group:
-            self._labels[self._mpp.k8s_group_label] = str(self._mpp.group)
+            self._labels[self._CITUS_LABEL] = self._citus_group
 
         self._retry = Retry(deadline=config['retry_timeout'], max_delay=1, max_tries=-1,
                             retry_exceptions=KubernetesRetriableException)
@@ -934,32 +936,20 @@ class Kubernetes(AbstractDCS):
 
         return Cluster(initialize, config, leader, status, members, failover, sync, history, failsafe)
 
-    def _postgresql_cluster_loader(self, path: Dict[str, Any]) -> Cluster:
+    def _cluster_loader(self, path: Dict[str, Any]) -> Cluster:
-        """Load and build the :class:`Cluster` object from DCS, which represents a single PostgreSQL cluster.
-
-        :param path: the path in DCS where to load :class:`Cluster` from.
-
-        :returns: :class:`Cluster` instance.
-        """
         return self._cluster_from_nodes(path['group'], path['nodes'], path['pods'].values())
 
-    def _mpp_cluster_loader(self, path: Dict[str, Any]) -> Dict[int, Cluster]:
+    def _citus_cluster_loader(self, path: Dict[str, Any]) -> Dict[int, Cluster]:
-        """Load and build all PostgreSQL clusters from a single MPP cluster.
-
-        :param path: the path in DCS where to load Cluster(s) from.
-
-        :returns: all MPP groups as :class:`dict`, with group IDs as keys and :class:`Cluster` objects as values.
-        """
         clusters: Dict[str, Dict[str, Dict[str, K8sObject]]] = defaultdict(lambda: defaultdict(dict))
 
         for name, pod in path['pods'].items():
-            group = pod.metadata.labels.get(self._mpp.k8s_group_label)
+            group = pod.metadata.labels.get(self._CITUS_LABEL)
-            if group and self._mpp.group_re.match(group):
+            if group and citus_group_re.match(group):
                 clusters[group]['pods'][name] = pod
 
         for name, kind in path['nodes'].items():
-            group = kind.metadata.labels.get(self._mpp.k8s_group_label)
+            group = kind.metadata.labels.get(self._CITUS_LABEL)
-            if group and self._mpp.group_re.match(group):
+            if group and citus_group_re.match(group):
                 clusters[group]['nodes'][name] = kind
         return {int(group): self._cluster_from_nodes(group, value['nodes'], value['pods'].values())
                 for group, value in clusters.items()}
@@ -975,9 +965,9 @@ class Kubernetes(AbstractDCS):
             with self._condition:
                 self._wait_caches(stop_time)
                 pods = {name: pod for name, pod in self._pods.copy().items()
-                        if not group or pod.metadata.labels.get(self._mpp.k8s_group_label) == group}
+                        if not group or pod.metadata.labels.get(self._CITUS_LABEL) == group}
                 nodes = {name: kind for name, kind in self._kinds.copy().items()
-                         if not group or kind.metadata.labels.get(self._mpp.k8s_group_label) == group}
+                         if not group or kind.metadata.labels.get(self._CITUS_LABEL) == group}
             return loader({'group': group, 'pods': pods, 'nodes': nodes})
         except Exception:
             logger.exception('get_cluster')
@@ -986,24 +976,17 @@ class Kubernetes(AbstractDCS):
     def _load_cluster(
             self, path: str, loader: Callable[[Any], Union[Cluster, Dict[int, Cluster]]]
     ) -> Union[Cluster, Dict[int, Cluster]]:
-        group = str(self._mpp.group) if self._mpp.is_enabled() and path == self.client_path('') else None
+        group = self._citus_group if path == self.client_path('') else None
         return self.__load_cluster(group, loader)
 
-    def get_mpp_coordinator(self) -> Optional[Cluster]:
+    def get_citus_coordinator(self) -> Optional[Cluster]:
-        """Load the PostgreSQL cluster for the MPP Coordinator.
-
-        .. note::
-            This method is only executed on the worker nodes to find the coordinator.
-
-        :returns: Select :class:`Cluster` instance associated with the MPP Coordinator group ID.
-        """
         try:
-            ret = self.__load_cluster(str(self._mpp.coordinator_group_id), self._postgresql_cluster_loader)
+            ret = self.__load_cluster(str(CITUS_COORDINATOR_GROUP_ID), self._cluster_loader)
             if TYPE_CHECKING:  # pragma: no cover
                 assert isinstance(ret, Cluster)
             return ret
         except Exception as e:
-            logger.error('Failed to load %s coordinator cluster from Kubernetes: %r', self._mpp.type, e)
+            logger.error('Failed to load Citus coordinator cluster from Kubernetes: %r', e)
 
     @staticmethod
     def compare_ports(p1: K8sObject, p2: K8sObject) -> bool:

patroni/dcs/raft.py

@@ -12,9 +12,9 @@ from pysyncobj.transport import TCPTransport, CONNECTION_STATE
 from pysyncobj.utility import TcpUtility
 from typing import Any, Callable, Collection, Dict, List, Optional, Set, Union, TYPE_CHECKING
 
-from . import AbstractDCS, ClusterConfig, Cluster, Failover, Leader, Member, Status, SyncState, TimelineHistory
+from . import AbstractDCS, ClusterConfig, Cluster, Failover, Leader, Member, Status, SyncState, \
+    TimelineHistory, citus_group_re
 from ..exceptions import DCSError
-from ..postgresql.mpp import AbstractMPP
 from ..utils import validate_directory
 if TYPE_CHECKING:  # pragma: no cover
     from ..config import Config
@@ -285,8 +285,8 @@ class KVStoreTTL(DynMemberSyncObj):
 
 class Raft(AbstractDCS):
 
-    def __init__(self, config: Dict[str, Any], mpp: AbstractMPP) -> None:
+    def __init__(self, config: Dict[str, Any]) -> None:
-        super(Raft, self).__init__(config, mpp)
+        super(Raft, self).__init__(config)
         self._ttl = int(config.get('ttl') or 30)
 
         ready_event = threading.Event()
@@ -375,31 +375,19 @@ class Raft(AbstractDCS):
 
         return Cluster(initialize, config, leader, status, members, failover, sync, history, failsafe)
 
-    def _postgresql_cluster_loader(self, path: str) -> Cluster:
+    def _cluster_loader(self, path: str) -> Cluster:
-        """Load and build the :class:`Cluster` object from DCS, which represents a single PostgreSQL cluster.
-
-        :param path: the path in DCS where to load :class:`Cluster` from.
-
-        :returns: :class:`Cluster` instance.
-        """
         response = self._sync_obj.get(path, recursive=True)
         if not response:
             return Cluster.empty()
         nodes = {key[len(path):]: value for key, value in response.items()}
         return self._cluster_from_nodes(nodes)
 
-    def _mpp_cluster_loader(self, path: str) -> Dict[int, Cluster]:
+    def _citus_cluster_loader(self, path: str) -> Dict[int, Cluster]:
-        """Load and build all PostgreSQL clusters from a single MPP cluster.
-
-        :param path: the path in DCS where to load Cluster(s) from.
-
-        :returns: all MPP groups as :class:`dict`, with group IDs as keys and :class:`Cluster` objects as values.
-        """
         clusters: Dict[int, Dict[str, Any]] = defaultdict(dict)
         response = self._sync_obj.get(path, recursive=True)
         for key, value in (response or {}).items():
             key = key[len(path):].split('/', 1)
-            if len(key) == 2 and self._mpp.group_re.match(key[0]):
+            if len(key) == 2 and citus_group_re.match(key[0]):
                 clusters[int(key[0])][key[1]] = value
         return {group: self._cluster_from_nodes(nodes) for group, nodes in clusters.items()}
 

patroni/dcs/zookeeper.py

@@ -12,9 +12,9 @@ from kazoo.retry import RetryFailedError
 from kazoo.security import ACL, make_acl
 from typing import Any, Callable, Dict, List, Optional, Union, Tuple, TYPE_CHECKING
 
-from . import AbstractDCS, ClusterConfig, Cluster, Failover, Leader, Member, Status, SyncState, TimelineHistory
+from . import AbstractDCS, ClusterConfig, Cluster, Failover, Leader, Member, Status, SyncState, \
+    TimelineHistory, citus_group_re
 from ..exceptions import DCSError
-from ..postgresql.mpp import AbstractMPP
 from ..utils import deep_compare
 if TYPE_CHECKING:  # pragma: no cover
     from ..config import Config
@@ -87,8 +87,8 @@ class PatroniKazooClient(KazooClient):
 
 class ZooKeeper(AbstractDCS):
 
-    def __init__(self, config: Dict[str, Any], mpp: AbstractMPP) -> None:
+    def __init__(self, config: Dict[str, Any]) -> None:
-        super(ZooKeeper, self).__init__(config, mpp)
+        super(ZooKeeper, self).__init__(config)
 
         hosts: Union[str, List[str]] = config.get('hosts', [])
         if isinstance(hosts, list):
@@ -115,8 +115,7 @@ class ZooKeeper(AbstractDCS):
         self._client = PatroniKazooClient(hosts, handler=PatroniSequentialThreadingHandler(config['retry_timeout']),
                                           timeout=config['ttl'], connection_retry=KazooRetry(max_delay=1, max_tries=-1,
                                           sleep_func=time.sleep), command_retry=KazooRetry(max_delay=1, max_tries=-1,
-                                          deadline=config['retry_timeout'], sleep_func=time.sleep),
+                                          deadline=config['retry_timeout'], sleep_func=time.sleep), **kwargs)
-                                          auth_data=list(config.get('auth_data', {}).items()), **kwargs)
 
         self.__last_member_data: Optional[Dict[str, Any]] = None
 
@@ -214,13 +213,7 @@ class ZooKeeper(AbstractDCS):
                 members.append(self.member(member, *data))
         return members
 
-    def _postgresql_cluster_loader(self, path: str) -> Cluster:
+    def _cluster_loader(self, path: str) -> Cluster:
-        """Load and build the :class:`Cluster` object from DCS, which represents a single PostgreSQL cluster.
-
-        :param path: the path in DCS where to load :class:`Cluster` from.
-
-        :returns: :class:`Cluster` instance.
-        """
         nodes = set(self.get_children(path))
 
         # get initialize flag
@@ -264,17 +257,11 @@ class ZooKeeper(AbstractDCS):
 
         return Cluster(initialize, config, leader, status, members, failover, sync, history, failsafe)
 
-    def _mpp_cluster_loader(self, path: str) -> Dict[int, Cluster]:
+    def _citus_cluster_loader(self, path: str) -> Dict[int, Cluster]:
-        """Load and build all PostgreSQL clusters from a single MPP cluster.
-
-        :param path: the path in DCS where to load Cluster(s) from.
-
-        :returns: all MPP groups as :class:`dict`, with group IDs as keys and :class:`Cluster` objects as values.
-        """
         ret: Dict[int, Cluster] = {}
         for node in self.get_children(path):
-            if self._mpp.group_re.match(node):
+            if citus_group_re.match(node):
-                ret[int(node)] = self._postgresql_cluster_loader(path + node + '/')
+                ret[int(node)] = self._cluster_loader(path + node + '/')
         return ret
 
     def _load_cluster(

patroni/dynamic_loader.py

@@ -1,96 +0,0 @@
-"""Helper functions to search for implementations of specific abstract interface in a package."""
-import importlib
-import inspect
-import logging
-import os
-import pkgutil
-import sys
-from types import ModuleType
-
-from typing import Any, Dict, Iterator, List, Optional, Set, Tuple, TYPE_CHECKING, Type, TypeVar, Union
-
-if TYPE_CHECKING:  # pragma: no cover
-    from .config import Config
-
-logger = logging.getLogger(__name__)
-
-
-def iter_modules(package: str) -> List[str]:
-    """Get names of modules from *package*, depending on execution environment.
-
-    .. note::
-        If being packaged with PyInstaller, modules aren't discoverable dynamically by scanning source directory because
-        :class:`importlib.machinery.FrozenImporter` doesn't implement :func:`iter_modules`. But it is still possible to
-        find all potential modules by iterating through ``toc``, which contains list of all "frozen" resources.
-
-    :param package: a package name to search modules in, e.g. ``patroni.dcs``.
-
-    :returns: list of known module names with absolute python module path namespace, e.g. ``patroni.dcs.etcd``.
-    """
-    module_prefix = package + '.'
-
-    if getattr(sys, 'frozen', False):
-        toc: Set[str] = set()
-        # dirname may contain a few dots, which causes pkgutil.iter_importers()
-        # to misinterpret the path as a package name. This can be avoided
-        # altogether by not passing a path at all, because PyInstaller's
-        # FrozenImporter is a singleton and registered as top-level finder.
-        for importer in pkgutil.iter_importers():
-            if hasattr(importer, 'toc'):
-                toc |= getattr(importer, 'toc')
-        dots = module_prefix.count('.')  # search for modules only on the same level
-        return [module for module in toc if module.startswith(module_prefix) and module.count('.') == dots]
-
-    # here we are making an assumption that the package which is calling this function is already imported
-    pkg_file = sys.modules[package].__file__
-    if TYPE_CHECKING:  # pragma: no cover
-        assert isinstance(pkg_file, str)
-    return [name for _, name, is_pkg in pkgutil.iter_modules([os.path.dirname(pkg_file)], module_prefix) if not is_pkg]
-
-
-ClassType = TypeVar("ClassType")
-
-
-def find_class_in_module(module: ModuleType, cls_type: Type[ClassType]) -> Optional[Type[ClassType]]:
-    """Try to find the implementation of *cls_type* class interface in *module* matching the *module* name.
-
-    :param module: imported module.
-    :param cls_type: a class type we are looking for.
-
-    :returns: class with a name matching the name of *module* that implements *cls_type* or ``None`` if not found.
-    """
-    module_name = module.__name__.rpartition('.')[2]
-    return next(
-        (obj for obj_name, obj in module.__dict__.items()
-         if (obj_name.lower() == module_name
-             and inspect.isclass(obj) and issubclass(obj, cls_type))),
-        None)
-
-
-def iter_classes(
-        package: str, cls_type: Type[ClassType],
-        config: Optional[Union['Config', Dict[str, Any]]] = None
-) -> Iterator[Tuple[str, Type[ClassType]]]:
-    """Attempt to import modules and find implementations of *cls_type* that are present in the given configuration.
-
-    .. note::
-            If a module successfully imports we can assume that all its requirements are installed.
-
-    :param package: a package name to search modules in, e.g. ``patroni.dcs``.
-    :param cls_type: a class type we are looking for.
-    :param config: configuration information with possible module names as keys. If given, only attempt to import
-                   modules defined in the configuration. Else, if ``None``, attempt to import any supported module.
-
-    :yields: a tuple containing the module ``name`` and the imported class object.
-    """
-    for mod_name in iter_modules(package):
-        name = mod_name.rpartition('.')[2]
-        if config is None or name in config:
-            try:
-                module = importlib.import_module(mod_name)
-                module_cls = find_class_in_module(module, cls_type)
-                if module_cls:
-                    yield name, module_cls
-            except ImportError:
-                logger.log(logging.DEBUG if config is not None else logging.INFO,
-                           'Failed to import %s', mod_name)

patroni/global_config.py

@@ -1,227 +0,0 @@
-"""Implements *global_config* facilities.
-
-The :class:`GlobalConfig` object is instantiated on import and replaces
-``patroni.global_config`` module in :data:`sys.modules`, what allows to use
-its properties and methods like they were module variables and functions.
-"""
-import sys
-import types
-
-from copy import deepcopy
-from typing import Any, Dict, List, Optional, Union, TYPE_CHECKING
-
-from .utils import parse_bool, parse_int
-
-if TYPE_CHECKING:  # pragma: no cover
-    from .dcs import Cluster
-
-
-def __getattr__(mod: types.ModuleType, name: str) -> Any:
-    """This function exists just to make pyright happy.
-
-    Without it pyright complains about access to unknown members of global_config module.
-    """
-    return getattr(sys.modules[__name__], name)  # pragma: no cover
-
-
-class GlobalConfig(types.ModuleType):
-    """A class that wraps global configuration and provides convenient methods to access/check values."""
-
-    __file__ = __file__  # just to make unittest and pytest happy
-
-    def __init__(self) -> None:
-        """Initialize :class:`GlobalConfig` object."""
-        super().__init__(__name__)
-        self.__config = {}
-
-    @staticmethod
-    def _cluster_has_valid_config(cluster: Optional['Cluster']) -> bool:
-        """Check if provided *cluster* object has a valid global configuration.
-
-        :param cluster: the currently known cluster state from DCS.
-
-        :returns: ``True`` if provided *cluster* object has a valid global configuration, otherwise ``False``.
-        """
-        return bool(cluster and cluster.config and cluster.config.modify_version)
-
-    def update(self, cluster: Optional['Cluster']) -> None:
-        """Update with the new global configuration from the :class:`Cluster` object view.
-
-        .. note::
-            Global configuration is updated only when configuration in the *cluster* view is valid.
-
-            Update happens in-place and is executed only from the main heartbeat thread.
-
-        :param cluster: the currently known cluster state from DCS.
-        """
-        # Try to protect from the case when DCS was wiped out
-        if self._cluster_has_valid_config(cluster):
-            self.__config = cluster.config.data  # pyright: ignore [reportOptionalMemberAccess]
-
-    def from_cluster(self, cluster: Optional['Cluster']) -> 'GlobalConfig':
-        """Return :class:`GlobalConfig` instance from the provided :class:`Cluster` object view.
-
-        .. note::
-            If the provided *cluster* object doesn't have a valid global configuration we return
-            the last known valid state of the :class:`GlobalConfig` object.
-
-            This method is used when we need to have the most up-to-date values in the global configuration,
-            but we don't want to update the global object.
-
-        :param cluster: the currently known cluster state from DCS.
-
-        :returns: :class:`GlobalConfig` object.
-        """
-        if not self._cluster_has_valid_config(cluster):
-            return self
-
-        ret = GlobalConfig()
-        ret.update(cluster)
-        return ret
-
-    def get(self, name: str) -> Any:
-        """Gets global configuration value by *name*.
-
-        :param name: parameter name.
-
-        :returns: configuration value or ``None`` if it is missing.
-        """
-        return self.__config.get(name)
-
-    def check_mode(self, mode: str) -> bool:
-        """Checks whether the certain parameter is enabled.
-
-        :param mode: parameter name, e.g. ``synchronous_mode``, ``failsafe_mode``, ``pause``, ``check_timeline``, and
-            so on.
-
-        :returns: ``True`` if parameter *mode* is enabled in the global configuration.
-        """
-        return bool(parse_bool(self.__config.get(mode)))
-
-    @property
-    def is_paused(self) -> bool:
-        """``True`` if cluster is in maintenance mode."""
-        return self.check_mode('pause')
-
-    @property
-    def is_synchronous_mode(self) -> bool:
-        """``True`` if synchronous replication is requested and it is not a standby cluster config."""
-        return self.check_mode('synchronous_mode') and not self.is_standby_cluster
-
-    @property
-    def is_synchronous_mode_strict(self) -> bool:
-        """``True`` if at least one synchronous node is required."""
-        return self.check_mode('synchronous_mode_strict')
-
-    def get_standby_cluster_config(self) -> Union[Dict[str, Any], Any]:
-        """Get ``standby_cluster`` configuration.
-
-        :returns: a copy of ``standby_cluster`` configuration.
-        """
-        return deepcopy(self.get('standby_cluster'))
-
-    @property
-    def is_standby_cluster(self) -> bool:
-        """``True`` if global configuration has a valid ``standby_cluster`` section."""
-        config = self.get_standby_cluster_config()
-        return isinstance(config, dict) and\
-            bool(config.get('host') or config.get('port') or config.get('restore_command'))
-
-    def get_int(self, name: str, default: int = 0) -> int:
-        """Gets current value of *name* from the global configuration and try to return it as :class:`int`.
-
-        :param name: name of the parameter.
-        :param default: default value if *name* is not in the configuration or invalid.
-
-        :returns: currently configured value of *name* from the global configuration or *default* if it is not set or
-            invalid.
-        """
-        ret = parse_int(self.get(name))
-        return default if ret is None else ret
-
-    @property
-    def min_synchronous_nodes(self) -> int:
-        """The minimum number of synchronous nodes based on whether ``synchronous_mode_strict`` is enabled or not."""
-        return 1 if self.is_synchronous_mode_strict else 0
-
-    @property
-    def synchronous_node_count(self) -> int:
-        """Currently configured value of ``synchronous_node_count`` from the global configuration.
-
-        Assume ``1`` if it is not set or invalid.
-        """
-        return max(self.get_int('synchronous_node_count', 1), self.min_synchronous_nodes)
-
-    @property
-    def maximum_lag_on_failover(self) -> int:
-        """Currently configured value of ``maximum_lag_on_failover`` from the global configuration.
-
-        Assume ``1048576`` if it is not set or invalid.
-        """
-        return self.get_int('maximum_lag_on_failover', 1048576)
-
-    @property
-    def maximum_lag_on_syncnode(self) -> int:
-        """Currently configured value of ``maximum_lag_on_syncnode`` from the global configuration.
-
-        Assume ``-1`` if it is not set or invalid.
-        """
-        return self.get_int('maximum_lag_on_syncnode', -1)
-
-    @property
-    def primary_start_timeout(self) -> int:
-        """Currently configured value of ``primary_start_timeout`` from the global configuration.
-
-        Assume ``300`` if it is not set or invalid.
-
-        .. note::
-            ``master_start_timeout`` is still supported to keep backward compatibility.
-        """
-        default = 300
-        return self.get_int('primary_start_timeout', default)\
-            if 'primary_start_timeout' in self.__config else self.get_int('master_start_timeout', default)
-
-    @property
-    def primary_stop_timeout(self) -> int:
-        """Currently configured value of ``primary_stop_timeout`` from the global configuration.
-
-        Assume ``0`` if it is not set or invalid.
-
-        .. note::
-            ``master_stop_timeout`` is still supported to keep backward compatibility.
-        """
-        default = 0
-        return self.get_int('primary_stop_timeout', default)\
-            if 'primary_stop_timeout' in self.__config else self.get_int('master_stop_timeout', default)
-
-    @property
-    def ignore_slots_matchers(self) -> List[Dict[str, Any]]:
-        """Currently configured value of ``ignore_slots`` from the global configuration.
-
-        Assume an empty :class:`list` if not set.
-        """
-        return self.get('ignore_slots') or []
-
-    @property
-    def max_timelines_history(self) -> int:
-        """Currently configured value of ``max_timelines_history`` from the global configuration.
-
-        Assume ``0`` if not set or invalid.
-        """
-        return self.get_int('max_timelines_history', 0)
-
-    @property
-    def use_slots(self) -> bool:
-        """``True`` if cluster is configured to use replication slots."""
-        return bool(parse_bool((self.get('postgresql') or {}).get('use_slots', True)))
-
-    @property
-    def permanent_slots(self) -> Dict[str, Any]:
-        """Dictionary of permanent slots information from the global configuration."""
-        return deepcopy(self.get('permanent_replication_slots')
-                        or self.get('permanent_slots')
-                        or self.get('slots')
-                        or {})
-
-
-sys.modules[__name__] = GlobalConfig()

patroni/ha.py

@@ -10,7 +10,7 @@ from multiprocessing.pool import ThreadPool
 from threading import RLock
 from typing import Any, Callable, Collection, Dict, List, NamedTuple, Optional, Union, Tuple, TYPE_CHECKING
 
-from . import global_config, psycopg
+from . import psycopg
 from .__main__ import Patroni
 from .async_executor import AsyncExecutor, CriticalTask
 from .collections import CaseInsensitiveSet
@@ -156,6 +156,7 @@ class Ha(object):
         self._rewind = Rewind(self.state_handler)
         self.dcs = patroni.dcs
         self.cluster = Cluster.empty()
+        self.global_config = self.patroni.config.get_global_config(None)
         self.old_cluster = Cluster.empty()
         self._leader_expiry = 0
         self._leader_expiry_lock = RLock()
@@ -175,7 +176,7 @@ class Ha(object):
         # Count of concurrent sync disabling requests. Value above zero means that we don't want to be synchronous
         # standby. Changes protected by _member_state_lock.
         self._disable_sync = 0
-        # Remember the last known member role and state written to the DCS in order to notify MPP coordinator
+        # Remember the last known member role and state written to the DCS in order to notify Citus coordinator
         self._last_state = None
 
         # We need following property to avoid shutdown of postgres when join of Patroni to the postgres
@@ -187,20 +188,20 @@ class Ha(object):
 
     def primary_stop_timeout(self) -> Union[int, None]:
         """:returns: "primary_stop_timeout" from the global configuration or `None` when not in synchronous mode."""
-        ret = global_config.primary_stop_timeout
+        ret = self.global_config.primary_stop_timeout
         return ret if ret > 0 and self.is_synchronous_mode() else None
 
     def is_paused(self) -> bool:
         """:returns: `True` if in maintenance mode."""
-        return global_config.is_paused
+        return self.global_config.is_paused
 
     def check_timeline(self) -> bool:
         """:returns: `True` if should check whether the timeline is latest during the leader race."""
-        return global_config.check_mode('check_timeline')
+        return self.global_config.check_mode('check_timeline')
 
     def is_standby_cluster(self) -> bool:
         """:returns: `True` if global configuration has a valid "standby_cluster" section."""
-        return global_config.is_standby_cluster
+        return self.global_config.is_standby_cluster
 
     def is_leader(self) -> bool:
         """:returns: `True` if the current node is the leader, based on expiration set when it last held the key."""
@@ -294,8 +295,9 @@ class Ha(object):
             try:
                 last_lsn = self.state_handler.last_operation()
                 slots = self.cluster.filter_permanent_slots(
-                    self.state_handler,
+                    {**self.state_handler.slots(), slot_name_from_member_name(self.state_handler.name): last_lsn},
-                    {**self.state_handler.slots(), slot_name_from_member_name(self.state_handler.name): last_lsn})
+                    self.is_standby_cluster(),
+                    self.state_handler.major_version)
             except Exception:
                 logger.exception('Exception when called state_handler.last_operation()')
         if TYPE_CHECKING:  # pragma: no cover
@@ -326,26 +328,20 @@ class Ha(object):
             tags['nosync'] = True
         return tags
 
-    def notify_mpp_coordinator(self, event: str) -> None:
+    def notify_citus_coordinator(self, event: str) -> None:
-        """Send an event to the MPP coordinator.
+        if self.state_handler.citus_handler.is_worker():
-
+            coordinator = self.dcs.get_citus_coordinator()
-        :param event: the type of event for coordinator to parse.
-        """
-        mpp_handler = self.state_handler.mpp_handler
-        if mpp_handler.is_worker():
-            coordinator = self.dcs.get_mpp_coordinator()
             if coordinator and coordinator.leader and coordinator.leader.conn_url:
                 try:
                     data = {'type': event,
-                            'group': mpp_handler.group,
+                            'group': self.state_handler.citus_handler.group(),
                             'leader': self.state_handler.name,
                             'timeout': self.dcs.ttl,
                             'cooldown': self.patroni.config['retry_timeout']}
                     timeout = self.dcs.ttl if event == 'before_demote' else 2
-                    endpoint = 'citus' if mpp_handler.type == 'Citus' else 'mpp'
+                    self.patroni.request(coordinator.leader.member, 'post', 'citus', data, timeout=timeout, retries=0)
-                    self.patroni.request(coordinator.leader.member, 'post', endpoint, data, timeout=timeout, retries=0)
                 except Exception as e:
-                    logger.warning('Request to %s coordinator leader %s %s failed: %r', mpp_handler.type,
+                    logger.warning('Request to Citus coordinator leader %s %s failed: %r',
                                    coordinator.leader.name, coordinator.leader.member.api_url, e)
 
     def touch_member(self) -> bool:
@@ -367,9 +363,8 @@ class Ha(object):
             tags = self.get_effective_tags()
             if tags:
                 data['tags'] = tags
-            if self.state_handler.pending_restart_reason:
+            if self.state_handler.pending_restart:
                 data['pending_restart'] = True
-                data['pending_restart_reason'] = dict(self.state_handler.pending_restart_reason)
             if self._async_executor.scheduled_action in (None, 'promote') \
                     and data['state'] in ['running', 'restarting', 'starting']:
                 try:
@@ -409,7 +404,7 @@ class Ha(object):
             if ret:
                 new_state = (data['state'], {'master': 'primary'}.get(data['role'], data['role']))
                 if self._last_state != new_state and new_state == ('running', 'primary'):
-                    self.notify_mpp_coordinator('after_promote')
+                    self.notify_citus_coordinator('after_promote')
                 self._last_state = new_state
             return ret
 
@@ -455,7 +450,7 @@ class Ha(object):
             return ret or 'trying to bootstrap {0}'.format(msg)
 
         # no leader, but configuration may allowed replica creation using backup tools
-        create_replica_methods = global_config.get_standby_cluster_config().get('create_replica_methods', []) \
+        create_replica_methods = self.global_config.get_standby_cluster_config().get('create_replica_methods', []) \
             if self.is_standby_cluster() else None
         can_bootstrap = self.state_handler.can_create_replica_without_replication_connection(create_replica_methods)
         concurrent_bootstrap = self.cluster.initialize == ""
@@ -530,7 +525,7 @@ class Ha(object):
         :returns: action message, describing what was performed.
         """
         if self.has_lock() and self.update_lock():
-            timeout = global_config.primary_start_timeout
+            timeout = self.global_config.primary_start_timeout
             if timeout == 0:
                 # We are requested to prefer failing over to restarting primary. But see first if there
                 # is anyone to fail over to.
@@ -627,7 +622,7 @@ class Ha(object):
             for param in params:  # It is highly unlikely to happen, but we want to protect from the case
                 node_to_follow.data.pop(param, None)  # when above-mentioned params came from outside.
             if self.is_standby_cluster():
-                standby_config = global_config.get_standby_cluster_config()
+                standby_config = self.global_config.get_standby_cluster_config()
                 node_to_follow.data.update({p: standby_config[p] for p in params if standby_config.get(p)})
 
         return node_to_follow
@@ -689,11 +684,11 @@ class Ha(object):
 
     def is_synchronous_mode(self) -> bool:
         """:returns: `True` if synchronous replication is requested."""
-        return global_config.is_synchronous_mode
+        return self.global_config.is_synchronous_mode
 
     def is_failsafe_mode(self) -> bool:
         """:returns: `True` if failsafe_mode is enabled in global configuration."""
-        return global_config.check_mode('failsafe_mode')
+        return self.global_config.check_mode('failsafe_mode')
 
     def process_sync_replication(self) -> None:
         """Process synchronous standby beahvior.
@@ -737,7 +732,7 @@ class Ha(object):
                         return logger.info('Synchronous replication key updated by someone else.')
 
                 # When strict mode and no suitable replication connections put "*" to synchronous_standby_names
-                if global_config.is_synchronous_mode_strict and not picked:
+                if self.global_config.is_synchronous_mode_strict and not picked:
                     picked = CaseInsensitiveSet('*')
                     logger.warning("No standbys available!")
 
@@ -810,7 +805,7 @@ class Ha(object):
             cluster_history_dict: Dict[int, List[Any]] = {line[0]: list(line) for line in cluster_history}
             history: List[List[Any]] = list(map(list, self.state_handler.get_history(primary_timeline)))
             if self.cluster.config:
-                history = history[-global_config.max_timelines_history:]
+                history = history[-self.cluster.config.max_timelines_history:]
             for line in history:
                 # enrich current history with promotion timestamps stored in DCS
                 cluster_history_line = cluster_history_dict.get(line[0], [])
@@ -854,7 +849,7 @@ class Ha(object):
             self.state_handler.set_role('master')
             self.process_sync_replication()
             self.update_cluster_history()
-            self.state_handler.mpp_handler.sync_meta_data(self.cluster)
+            self.state_handler.citus_handler.sync_pg_dist_node(self.cluster)
             return message
         elif self.state_handler.role in ('master', 'promoted', 'primary'):
             self.process_sync_replication()
@@ -868,13 +863,13 @@ class Ha(object):
                     # promotion until next cycle. TODO: trigger immediate retry of run_cycle
                     return 'Postponing promotion because synchronous replication state was updated by somebody else'
                 self.state_handler.sync_handler.set_synchronous_standby_names(
-                    CaseInsensitiveSet('*') if global_config.is_synchronous_mode_strict else CaseInsensitiveSet())
+                    CaseInsensitiveSet('*') if self.global_config.is_synchronous_mode_strict else CaseInsensitiveSet())
             if self.state_handler.role not in ('master', 'promoted', 'primary'):
                 # reset failsafe state when promote
                 self._failsafe.set_is_active(0)
 
                 def before_promote():
-                    self.notify_mpp_coordinator('before_promote')
+                    self.notify_citus_coordinator('before_promote')
 
                 with self._async_response:
                     self._async_response.reset()
@@ -979,7 +974,7 @@ class Ha(object):
         :returns True when node is lagging
         """
         lag = (self.cluster.last_lsn or 0) - wal_position
-        return lag > global_config.maximum_lag_on_failover
+        return lag > self.global_config.maximum_lag_on_failover
 
     def _is_healthiest_node(self, members: Collection[Member], check_replication_lag: bool = True) -> bool:
         """This method tries to determine whether I am healthy enough to became a new leader candidate or not."""
@@ -1245,10 +1240,10 @@ class Ha(object):
                     status['released'] = True
 
         def before_shutdown() -> None:
-            if self.state_handler.mpp_handler.is_coordinator():
+            if self.state_handler.citus_handler.is_coordinator():
-                self.state_handler.mpp_handler.on_demote()
+                self.state_handler.citus_handler.on_demote()
             else:
-                self.notify_mpp_coordinator('before_demote')
+                self.notify_citus_coordinator('before_demote')
 
         self.state_handler.stop(str(mode_control['stop']), checkpoint=bool(mode_control['checkpoint']),
                                 on_safepoint=self.watchdog.disable if self.watchdog.is_running else None,
@@ -1492,7 +1487,7 @@ class Ha(object):
         if postgres_version and postgres_version_to_int(postgres_version) <= int(self.state_handler.server_version):
             reason_to_cancel = "postgres version mismatch"
 
-        if pending_restart and not self.state_handler.pending_restart_reason:
+        if pending_restart and not self.state_handler.pending_restart:
             reason_to_cancel = "pending restart flag is not set"
 
         if not reason_to_cancel:
@@ -1546,14 +1541,14 @@ class Ha(object):
 
         # Now that restart is scheduled we can set timeout for startup, it will get reset
         # once async executor runs and main loop notices PostgreSQL as up.
-        timeout = restart_data.get('timeout', global_config.primary_start_timeout)
+        timeout = restart_data.get('timeout', self.global_config.primary_start_timeout)
         self.set_start_timeout(timeout)
 
         def before_shutdown() -> None:
-            self.notify_mpp_coordinator('before_demote')
+            self.notify_citus_coordinator('before_demote')
 
         def after_start() -> None:
-            self.notify_mpp_coordinator('after_promote')
+            self.notify_citus_coordinator('after_promote')
 
         # For non async cases we want to wait for restart to complete or timeout before returning.
         do_restart = functools.partial(self.state_handler.restart, timeout, self._async_executor.critical_task,
@@ -1610,7 +1605,7 @@ class Ha(object):
         """Figure out what to do with the task AsyncExecutor is performing."""
         if self.has_lock() and self.update_lock():
             if self._async_executor.scheduled_action == 'doing crash recovery in a single user mode':
-                time_left = global_config.primary_start_timeout - (time.time() - self._crash_recovery_started)
+                time_left = self.global_config.primary_start_timeout - (time.time() - self._crash_recovery_started)
                 if time_left <= 0 and self.is_failover_possible():
                     logger.info("Demoting self because crash recovery is taking too long")
                     self.state_handler.cancellable.cancel(True)
@@ -1695,7 +1690,7 @@ class Ha(object):
         self.set_is_leader(True)
         if self.is_synchronous_mode():
             self.state_handler.sync_handler.set_synchronous_standby_names(
-                CaseInsensitiveSet('*') if global_config.is_synchronous_mode_strict else CaseInsensitiveSet())
+                CaseInsensitiveSet('*') if self.global_config.is_synchronous_mode_strict else CaseInsensitiveSet())
         self.state_handler.call_nowait(CallbackAction.ON_START)
         self.load_cluster_from_dcs()
 
@@ -1718,7 +1713,7 @@ class Ha(object):
                 self.demote('immediate-nolock')
                 return 'stopped PostgreSQL while starting up because leader key was lost'
 
-            timeout = self._start_timeout or global_config.primary_start_timeout
+            timeout = self._start_timeout or self.global_config.primary_start_timeout
             time_left = timeout - self.state_handler.time_in_state()
 
             if time_left <= 0:
@@ -1751,8 +1746,8 @@ class Ha(object):
         try:
             try:
                 self.load_cluster_from_dcs()
-                global_config.update(self.cluster)
+                self.global_config = self.patroni.config.get_global_config(self.cluster)
-                self.state_handler.reset_cluster_info_state(self.cluster, self.patroni)
+                self.state_handler.reset_cluster_info_state(self.cluster, self.patroni.nofailover, self.global_config)
             except Exception:
                 self.state_handler.reset_cluster_info_state(None)
                 raise
@@ -1772,10 +1767,10 @@ class Ha(object):
                 self.touch_member()
 
             # cluster has leader key but not initialize key
-            if self.has_lock(False) and not self.sysid_valid(self.cluster.initialize):
+            if not (self.cluster.is_unlocked() or self.sysid_valid(self.cluster.initialize)) and self.has_lock():
                 self.dcs.initialize(create_new=(self.cluster.initialize is None), sysid=self.state_handler.sysid)
 
-            if self.has_lock(False) and not (self.cluster.config and self.cluster.config.data):
+            if not (self.cluster.is_unlocked() or self.cluster.config and self.cluster.config.data) and self.has_lock():
                 self.dcs.set_config_value(json.dumps(self.patroni.config.dynamic_configuration, separators=(',', ':')))
                 self.cluster = self.dcs.get_cluster()
 
@@ -1856,9 +1851,10 @@ class Ha(object):
                             logger.fatal('system ID mismatch, node %s belongs to a different cluster: %s != %s',
                                          self.state_handler.name, self.cluster.initialize, data_sysid)
                             sys.exit(1)
-                elif self.cluster.is_unlocked() and not self.is_paused() and not self.state_handler.cb_called:
+                elif self.cluster.is_unlocked() and not self.is_paused():
                     # "bootstrap", but data directory is not empty
-                    if self.state_handler.is_running() and not self.state_handler.is_primary():
+                    if not self.state_handler.cb_called and self.state_handler.is_running() \
+                            and not self.state_handler.is_primary():
                         self._join_aborted = True
                         logger.error('No initialize key in DCS and PostgreSQL is running as replica, aborting start')
                         logger.error('Please first start Patroni on the node running as primary')
@@ -1908,7 +1904,7 @@ class Ha(object):
                 if not is_promoting and create_slots and self.cluster.leader:
                     err = self._async_executor.try_run_async('copy_logical_slots',
                                                              self.state_handler.slots_handler.copy_logical_slots,
-                                                             args=(self.cluster, self.patroni, create_slots))
+                                                             args=(self.cluster, create_slots))
                     if not err:
                         ret = 'Copying logical slots {0} from the primary'.format(create_slots)
             return ret
@@ -1964,7 +1960,10 @@ class Ha(object):
         cluster = self._failsafe.update_cluster(self.cluster)\
             if self.is_failsafe_mode() and not self.is_leader() else self.cluster
         if cluster:
-            slots = self.state_handler.slots_handler.sync_replication_slots(cluster, self.patroni)
+            slots = self.state_handler.slots_handler.sync_replication_slots(cluster,
+                                                                            self.patroni.nofailover,
+                                                                            self.patroni.replicatefrom,
+                                                                            self.is_paused())
         # Don't copy replication slots if failsafe_mode is active
         return [] if self.failsafe_is_active() else slots
 
@@ -2006,7 +2005,7 @@ class Ha(object):
                         self.dcs.write_leader_optime(prev_location)
 
             def _before_shutdown() -> None:
-                self.notify_mpp_coordinator('before_demote')
+                self.notify_citus_coordinator('before_demote')
 
             on_shutdown = _on_shutdown if self.is_leader() else None
             before_shutdown = _before_shutdown if self.is_leader() else None
@@ -2048,7 +2047,7 @@ class Ha(object):
         config or cluster.config.data.
         """
         data: Dict[str, Any] = {}
-        cluster_params = global_config.get_standby_cluster_config()
+        cluster_params = self.global_config.get_standby_cluster_config()
 
         if cluster_params:
             data.update({k: v for k, v in cluster_params.items() if k in RemoteMember.ALLOWED_KEYS})

patroni/log.py

@@ -9,15 +9,12 @@ import sys
 
 from copy import deepcopy
 from logging.handlers import RotatingFileHandler
+from patroni.utils import deep_compare
 from queue import Queue, Full
 from threading import Lock, Thread
 
 from typing import Any, Dict, List, Optional, Union, TYPE_CHECKING
 
-from .utils import deep_compare
-
-type_logformat = Union[List[Union[str, Dict[str, Any], Any]], str, Any]
-
 _LOGGER = logging.getLogger(__name__)
 
 
@@ -160,7 +157,6 @@ class PatroniLogger(Thread):
     .. seealso::
         :class:`QueueHandler`: object used for enqueueing messages in-memory.
 
-    :cvar DEFAULT_TYPE: default type of log format (``plain``).
     :cvar DEFAULT_LEVEL: default logging level (``INFO``).
     :cvar DEFAULT_TRACEBACK_LEVEL: default traceback logging level (``ERROR``).
     :cvar DEFAULT_FORMAT: default format of log messages (``%(asctime)s %(levelname)s: %(message)s``).
@@ -173,7 +169,6 @@ class PatroniLogger(Thread):
     :ivar log_handler_lock: lock used to modify ``log_handler``.
     """
 
-    DEFAULT_TYPE = 'plain'
     DEFAULT_LEVEL = 'INFO'
     DEFAULT_TRACEBACK_LEVEL = 'ERROR'
     DEFAULT_FORMAT = '%(asctime)s %(levelname)s: %(message)s'
@@ -242,151 +237,6 @@ class PatroniLogger(Thread):
             logger = self._root_logger.manager.getLogger(name)
             logger.setLevel(level)
 
-    def _is_config_changed(self, config: Dict[str, Any]) -> bool:
-        """Checks if the given config is different from the current one.
-
-        :param config: ``log`` section from Patroni configuration.
-
-        :returns: ``True`` if the config is changed, ``False`` otherwise.
-        """
-        old_config = self._config or {}
-
-        oldlogtype = old_config.get('type', PatroniLogger.DEFAULT_TYPE)
-        logtype = config.get('type', PatroniLogger.DEFAULT_TYPE)
-
-        oldlogformat: type_logformat = old_config.get('format', PatroniLogger.DEFAULT_FORMAT)
-        logformat: type_logformat = config.get('format', PatroniLogger.DEFAULT_FORMAT)
-
-        olddateformat = old_config.get('dateformat') or None
-        dateformat = config.get('dateformat') or None  # Convert empty string to `None`
-
-        old_static_fields = old_config.get('static_fields', {})
-        static_fields = config.get('static_fields', {})
-
-        old_log_config = {
-            'type': oldlogtype,
-            'format': oldlogformat,
-            'dateformat': olddateformat,
-            'static_fields': old_static_fields
-        }
-
-        log_config = {
-            'type': logtype,
-            'format': logformat,
-            'dateformat': dateformat,
-            'static_fields': static_fields
-        }
-
-        return not deep_compare(old_log_config, log_config)
-
-    def _get_plain_formatter(self, logformat: type_logformat, dateformat: Optional[str]) -> logging.Formatter:
-        """Returns a logging formatter with the specified format and date format.
-
-        .. note::
-            If the log format isn't a string, prints a warning message and uses the default log format instead.
-
-        :param logformat: The format of the log messages.
-        :param dateformat: The format of the timestamp in the log messages.
-
-        :returns: A logging formatter object that can be used to format log records.
-        """
-
-        if not isinstance(logformat, str):
-            _LOGGER.warning('Expected log format to be a string when log type is plain, but got "%s"', type(logformat))
-            logformat = PatroniLogger.DEFAULT_FORMAT
-
-        return logging.Formatter(logformat, dateformat)
-
-    def _get_json_formatter(self, logformat: type_logformat, dateformat: Optional[str],
-                            static_fields: Dict[str, Any]) -> logging.Formatter:
-        """Returns a logging formatter that outputs JSON formatted messages.
-
-        .. note::
-            If :mod:`pythonjsonlogger` library is not installed, prints an error message and returns
-            a plain log formatter instead.
-
-        :param logformat: Specifies the log fields and their key names in the JSON log message.
-        :param dateformat: The format of the timestamp in the log messages.
-        :param static_fields: A dictionary of static fields that are added to every log message.
-
-        :returns: A logging formatter object that can be used to format log records as JSON strings.
-        """
-
-        if isinstance(logformat, str):
-            jsonformat = logformat
-            rename_fields = {}
-        elif isinstance(logformat, list):
-            log_fields: List[str] = []
-            rename_fields: Dict[str, str] = {}
-
-            for field in logformat:
-                if isinstance(field, str):
-                    log_fields.append(field)
-                elif isinstance(field, dict):
-                    for original_field, renamed_field in field.items():
-                        if isinstance(renamed_field, str):
-                            log_fields.append(original_field)
-                            rename_fields[original_field] = renamed_field
-                        else:
-                            _LOGGER.warning(
-                                'Expected renamed log field to be a string, but got "%s"',
-                                type(renamed_field)
-                            )
-
-                else:
-                    _LOGGER.warning(
-                        'Expected each item of log format to be a string or dictionary, but got "%s"',
-                        type(field)
-                    )
-
-            if len(log_fields) > 0:
-                jsonformat = ' '.join([f'%({field})s' for field in log_fields])
-            else:
-                jsonformat = PatroniLogger.DEFAULT_FORMAT
-        else:
-            jsonformat = PatroniLogger.DEFAULT_FORMAT
-            rename_fields = {}
-            _LOGGER.warning('Expected log format to be a string or a list, but got "%s"', type(logformat))
-
-        try:
-            from pythonjsonlogger import jsonlogger
-
-            return jsonlogger.JsonFormatter(
-                jsonformat,
-                dateformat,
-                rename_fields=rename_fields,
-                static_fields=static_fields
-            )
-        except ImportError as e:
-            _LOGGER.error('Failed to import "python-json-logger" library: %r. Falling back to the plain logger', e)
-        except Exception as e:
-            _LOGGER.error('Failed to initialize JsonFormatter: %r. Falling back to the plain logger', e)
-
-        return self._get_plain_formatter(jsonformat, dateformat)
-
-    def _get_formatter(self, config: Dict[str, Any]) -> logging.Formatter:
-        """Returns a logging formatter based on the type of logger in the given configuration.
-
-        :param config: ``log`` section from Patroni configuration.
-
-        :returns: A :class:`logging.Formatter` object that can be used to format log records.
-        """
-        logtype = config.get('type', PatroniLogger.DEFAULT_TYPE)
-        logformat: type_logformat = config.get('format', PatroniLogger.DEFAULT_FORMAT)
-        dateformat = config.get('dateformat') or None  # Convert empty string to `None`
-        static_fields = config.get('static_fields', {})
-
-        if dateformat is not None and not isinstance(dateformat, str):
-            _LOGGER.warning('Expected log dateformat to be a string, but got "%s"', type(dateformat))
-            dateformat = None
-
-        if logtype == 'json':
-            formatter = self._get_json_formatter(logformat, dateformat, static_fields)
-        else:
-            formatter = self._get_plain_formatter(logformat, dateformat)
-
-        return formatter
-
     def reload_config(self, config: Dict[str, Any]) -> None:
         """Apply log related configuration.
 
@@ -407,30 +257,34 @@ class PatroniLogger(Thread):
                 # show stack traces as ``ERROR`` log messages
                 logging.Logger.exception = error_exception
 
-            handler = self.log_handler
+            new_handler = None
-
             if 'dir' in config:
-                if not isinstance(handler, RotatingFileHandler):
+                if not isinstance(self.log_handler, RotatingFileHandler):
-                    handler = RotatingFileHandler(os.path.join(config['dir'], __name__))
+                    new_handler = RotatingFileHandler(os.path.join(config['dir'], __name__))
-
+                handler = new_handler or self.log_handler
+                if TYPE_CHECKING:  # pragma: no cover
+                    assert isinstance(handler, RotatingFileHandler)
                 handler.maxBytes = int(config.get('file_size', 25000000))  # pyright: ignore [reportGeneralTypeIssues]
                 handler.backupCount = int(config.get('file_num', 4))
-            # we can't use `if not isinstance(handler, logging.StreamHandler)` below,
+            else:
-            # because RotatingFileHandler is a child of StreamHandler!!!
+                if self.log_handler is None or isinstance(self.log_handler, RotatingFileHandler):
-            elif handler is None or isinstance(handler, RotatingFileHandler):
+                    new_handler = logging.StreamHandler()
-                handler = logging.StreamHandler()
+                handler = new_handler or self.log_handler
 
-            is_new_handler = handler != self.log_handler
+            oldlogformat = (self._config or {}).get('format', PatroniLogger.DEFAULT_FORMAT)
+            logformat = config.get('format', PatroniLogger.DEFAULT_FORMAT)
 
-            if (self._is_config_changed(config) or is_new_handler) and handler:
+            olddateformat = (self._config or {}).get('dateformat') or None
-                formatter = self._get_formatter(config)
+            dateformat = config.get('dateformat') or None  # Convert empty string to `None`
-                handler.setFormatter(formatter)
 
-            if is_new_handler:
+            if (oldlogformat != logformat or olddateformat != dateformat or new_handler) and handler:
+                handler.setFormatter(logging.Formatter(logformat, dateformat))
+
+            if new_handler:
                 with self.log_handler_lock:
                     if self.log_handler:
                         self._old_handlers.append(self.log_handler)
-                    self.log_handler = handler
+                    self.log_handler = new_handler
 
             self._config = config.copy()
             self.update_loggers(config.get('loggers') or {})

patroni/postgresql/__init__.py

@@ -19,22 +19,22 @@ from .callback_executor import CallbackAction, CallbackExecutor
 from .cancellable import CancellableSubprocess
 from .config import ConfigHandler, mtime
 from .connection import ConnectionPool, get_connection_cursor
+from .citus import CitusHandler
 from .misc import parse_history, parse_lsn, postgres_major_version_to_int
-from .mpp import AbstractMPP
 from .postmaster import PostmasterProcess
 from .slots import SlotsHandler
 from .sync import SyncHandler
-from .. import global_config, psycopg
+from .. import psycopg
 from ..async_executor import CriticalTask
-from ..collections import CaseInsensitiveSet, CaseInsensitiveDict
+from ..collections import CaseInsensitiveSet
 from ..dcs import Cluster, Leader, Member, SLOT_ADVANCE_AVAILABLE_VERSION
 from ..exceptions import PostgresConnectionException
 from ..utils import Retry, RetryFailedError, polling_loop, data_directory_is_empty, parse_int
-from ..tags import Tags
 
 if TYPE_CHECKING:  # pragma: no cover
     from psycopg import Connection as Connection3, Cursor
     from psycopg2 import connection as connection3, cursor
+    from ..config import GlobalConfig
 
 logger = logging.getLogger(__name__)
 
@@ -63,7 +63,7 @@ class Postgresql(object):
               "pg_catalog.pg_{0}_{1}_diff(COALESCE(pg_catalog.pg_last_{0}_receive_{1}(), '0/0'), '0/0')::bigint, "
               "pg_catalog.pg_is_in_recovery() AND pg_catalog.pg_is_{0}_replay_paused()")
 
-    def __init__(self, config: Dict[str, Any], mpp: AbstractMPP) -> None:
+    def __init__(self, config: Dict[str, Any]) -> None:
         self.name: str = config['name']
         self.scope: str = config['scope']
         self._data_dir: str = config['data_dir']
@@ -73,14 +73,15 @@ class Postgresql(object):
         self.connection_string: str
         self.proxy_url: Optional[str]
         self._major_version = self.get_major_version()
+        self._global_config = None
 
         self._state_lock = Lock()
         self.set_state('stopped')
 
-        self._pending_restart_reason = CaseInsensitiveDict()
+        self._pending_restart = False
         self.connection_pool = ConnectionPool()
         self._connection = self.connection_pool.get('heartbeat')
-        self.mpp_handler = mpp.get_handler_impl(self)
+        self.citus_handler = CitusHandler(self, config.get('citus'))
         self.config = ConfigHandler(self, config)
         self.config.check_directories()
 
@@ -218,7 +219,7 @@ class Postgresql(object):
                          "FROM pg_catalog.pg_stat_get_wal_senders() w,"
                          " pg_catalog.pg_stat_get_activity(w.pid)"
                          " WHERE w.state = 'streaming') r)").format(self.wal_name, self.lsn_name)
-                        if global_config.is_synchronous_mode
+                        if (not self.global_config or self.global_config.is_synchronous_mode)
                         and self.role in ('master', 'primary', 'promoted') else "'on', '', NULL")
 
         if self._major_version >= 90600:
@@ -321,22 +322,11 @@ class Postgresql(object):
         self._is_leader_retry.deadline = self.retry.deadline = config['retry_timeout'] / 2.0
 
     @property
-    def pending_restart_reason(self) -> CaseInsensitiveDict:
+    def pending_restart(self) -> bool:
-        """Get :attr:`_pending_restart_reason` value.
+        return self._pending_restart
 
-        :attr:`_pending_restart_reason` is a :class:`CaseInsensitiveDict` object of the PG parameters that are
+    def set_pending_restart(self, value: bool) -> None:
-        causing pending restart state. Every key is a parameter name, value - a dictionary containing the old
+        self._pending_restart = value
-        and the new value (see :func:`~patroni.postgresql.config.get_param_diff`).
-        """
-        return self._pending_restart_reason
-
-    def set_pending_restart_reason(self, diff_dict: CaseInsensitiveDict) -> None:
-        """Set new or update current :attr:`_pending_restart_reason`.
-
-        :param diff_dict: :class:``CaseInsensitiveDict`` object with the parameters that are causing pending restart
-            state with the diff of their values. Used to reset/update the :attr:`_pending_restart_reason`.
-        """
-        self._pending_restart_reason = diff_dict
 
     @property
     def sysid(self) -> str:
@@ -440,30 +430,46 @@ class Postgresql(object):
                 self.config.write_postgresql_conf()
                 self.reload()
 
-    def reset_cluster_info_state(self, cluster: Optional[Cluster], tags: Optional[Tags] = None) -> None:
+    @property
+    def global_config(self) -> Optional['GlobalConfig']:
+        return self._global_config
+
+    def reset_cluster_info_state(self, cluster: Union[Cluster, None], nofailover: bool = False,
+                                 global_config: Optional['GlobalConfig'] = None) -> None:
         """Reset monitoring query cache.
 
-        .. note::
+        It happens in the beginning of heart-beat loop and on change of `synchronous_standby_names`.
-            It happens in the beginning of heart-beat loop and on change of `synchronous_standby_names`.
 
         :param cluster: currently known cluster state from DCS
-        :param tags: reference to an object implementing :class:`Tags` interface.
+        :param nofailover: whether this node could become a new primary.
+                           Important when there are logical permanent replication slots because "nofailover"
+                           node could do cascading replication and should enable `hot_standby_feedback`
+        :param global_config: last known :class:`GlobalConfig` object
         """
         self._cluster_info_state = {}
 
-        if not tags:
+        if global_config:
+            self._global_config = global_config
+
+        if not self._global_config:
             return
 
-        if global_config.is_standby_cluster:
+        if self._global_config.is_standby_cluster:
             # Standby cluster can't have logical replication slots, and we don't need to enforce hot_standby_feedback
             self.set_enforce_hot_standby_feedback(False)
 
         if cluster and cluster.config and cluster.config.modify_version:
             # We want to enable hot_standby_feedback if the replica is supposed
             # to have a logical slot or in case if it is the cascading replica.
-            self.set_enforce_hot_standby_feedback(not global_config.is_standby_cluster and self.can_advance_slots
+            self.set_enforce_hot_standby_feedback(not self._global_config.is_standby_cluster and self.can_advance_slots
-                                                  and cluster.should_enforce_hot_standby_feedback(self, tags))
+                                                  and cluster.should_enforce_hot_standby_feedback(self.name,
-            self._has_permanent_slots = cluster.has_permanent_slots(self, tags)
+                                                                                                  nofailover))
+
+            self._has_permanent_slots = cluster.has_permanent_slots(
+                my_name=self.name,
+                is_standby_cluster=self._global_config.is_standby_cluster,
+                nofailover=nofailover,
+                major_version=self.major_version)
 
     def _cluster_info_state_get(self, name: str) -> Optional[Any]:
         if not self._cluster_info_state:
@@ -738,7 +744,7 @@ class Postgresql(object):
         self.set_role(role or self.get_postgres_role_from_data_directory())
 
         self.set_state('starting')
-        self.set_pending_restart_reason(CaseInsensitiveDict())
+        self._pending_restart = False
 
         try:
             if not self.ensure_major_version_is_known():
@@ -1208,7 +1214,7 @@ class Postgresql(object):
             before_promote()
 
         self.slots_handler.on_promote()
-        self.mpp_handler.schedule_cache_rebuild()
+        self.citus_handler.schedule_cache_rebuild()
 
         ret = self.pg_ctl('promote', '-W')
         if ret:
@@ -1355,7 +1361,7 @@ class Postgresql(object):
         """
         self.ensure_major_version_is_known()
         self.slots_handler.schedule()
-        self.mpp_handler.schedule_cache_rebuild()
+        self.citus_handler.schedule_cache_rebuild()
         self._sysid = ''
 
     def _get_gucs(self) -> CaseInsensitiveSet:

patroni/postgresql/bootstrap.py

@@ -100,11 +100,10 @@ class Bootstrap(object):
                     user_options.append('--{0}'.format(opt))
                 elif isinstance(opt, dict):
                     keys = list(opt.keys())
-                    if len(keys) == 1 and isinstance(opt[keys[0]], str) and option_is_allowed(keys[0]):
+                    if len(keys) != 1 or not isinstance(opt[keys[0]], str) or not option_is_allowed(keys[0]):
-                        user_options.append('--{0}={1}'.format(keys[0], unquote(opt[keys[0]])))
-                    else:
                         error_handler('Error when parsing {0} key-value option {1}: only one key-value is allowed'
                                       ' and value should be a string'.format(tool, opt[keys[0]]))
+                    user_options.append('--{0}={1}'.format(keys[0], unquote(opt[keys[0]])))
                 else:
                     error_handler('Error when parsing {0} option {1}: value should be string value'
                                   ' or a single key-value pair'.format(tool, opt))
@@ -464,15 +463,15 @@ END;$$""".format(f, quote_ident(rewind['username'], postgresql.connection()))
                         postgresql.restart()
                     else:
                         postgresql.config.replace_pg_hba()
-                        if postgresql.pending_restart_reason:
+                        if postgresql.pending_restart:
                             postgresql.restart()
                         else:
                             postgresql.reload()
                             time.sleep(1)  # give a time to postgres to "reload" configuration files
                             postgresql.connection().close()  # close connection to reconnect with a new password
                 else:  # initdb
-                    # We may want create database and extension for some MPP clusters
+                    # We may want create database and extension for citus
-                    self._postgresql.mpp_handler.bootstrap()
+                    self._postgresql.citus_handler.bootstrap()
         except Exception:
             logger.exception('post_bootstrap')
             task.complete(False)

patroni/postgresql/citus.py

@@ -6,15 +6,12 @@ from threading import Condition, Event, Thread
 from urllib.parse import urlparse
 from typing import Any, Dict, List, Optional, Union, Tuple, TYPE_CHECKING
 
-from . import AbstractMPP, AbstractMPPHandler
+from ..dcs import CITUS_COORDINATOR_GROUP_ID, Cluster
-from ...dcs import Cluster
+from ..psycopg import connect, quote_ident
-from ...psycopg import connect, quote_ident, ProgrammingError
-from ...utils import parse_int
 
 if TYPE_CHECKING:  # pragma: no cover
-    from .. import Postgresql
+    from . import Postgresql
 
-CITUS_COORDINATOR_GROUP_ID = 0
 CITUS_SLOT_NAME_RE = re.compile(r'^citus_shard_(move|split)_slot(_[1-9][0-9]*){2,3}$')
 logger = logging.getLogger(__name__)
 
@@ -66,45 +63,13 @@ class PgDistNode(object):
         return str(self)
 
 
-class Citus(AbstractMPP):
+class CitusHandler(Thread):
 
-    group_re = re.compile('^(0|[1-9][0-9]*)$')
+    def __init__(self, postgresql: 'Postgresql', config: Optional[Dict[str, Union[str, int]]]) -> None:
-
+        super(CitusHandler, self).__init__()
-    @staticmethod
-    def validate_config(config: Union[Any, Dict[str, Union[str, int]]]) -> bool:
-        """Check whether provided config is good for a given MPP.
-
-        :param config: configuration of ``citus`` MPP section.
-
-        :returns: ``True`` is config passes validation, otherwise ``False``.
-        """
-        return isinstance(config, dict) \
-            and isinstance(config.get('database'), str) \
-            and parse_int(config.get('group')) is not None
-
-    @property
-    def group(self) -> int:
-        """The group of this Citus node."""
-        return int(self._config['group'])
-
-    @property
-    def coordinator_group_id(self) -> int:
-        """The group id of the Citus coordinator PostgreSQL cluster."""
-        return CITUS_COORDINATOR_GROUP_ID
-
-
-class CitusHandler(Citus, AbstractMPPHandler, Thread):
-    """Define the interfaces for handling an underlying Citus cluster."""
-
-    def __init__(self, postgresql: 'Postgresql', config: Dict[str, Union[str, int]]) -> None:
-        """"Initialize a new instance of :class:`CitusHandler`.
-
-        :param postgresql: the Postgres node.
-        :param config: the ``citus`` MPP config section.
-        """
-        Thread.__init__(self)
-        AbstractMPPHandler.__init__(self, postgresql, config)
         self.daemon = True
+        self._postgresql = postgresql
+        self._config = config
         if config:
             self._connection = postgresql.connection_pool.get(
                 'citus', {'dbname': config['database'],
@@ -116,11 +81,19 @@ class CitusHandler(Citus, AbstractMPPHandler, Thread):
         self._condition = Condition()  # protects _pg_dist_node, _tasks, _in_flight, and _schedule_load_pg_dist_node
         self.schedule_cache_rebuild()
 
-    def schedule_cache_rebuild(self) -> None:
+    def is_enabled(self) -> bool:
-        """Cache rebuild handler.
+        return isinstance(self._config, dict)
 
-        Is called to notify handler that it has to refresh its metadata cache from the database.
+    def group(self) -> Optional[int]:
-        """
+        return int(self._config['group']) if isinstance(self._config, dict) else None
+
+    def is_coordinator(self) -> bool:
+        return self.is_enabled() and self.group() == CITUS_COORDINATOR_GROUP_ID
+
+    def is_worker(self) -> bool:
+        return self.is_enabled() and not self.is_coordinator()
+
+    def schedule_cache_rebuild(self) -> None:
         with self._condition:
             self._schedule_load_pg_dist_node = True
 
@@ -161,8 +134,8 @@ class CitusHandler(Citus, AbstractMPPHandler, Thread):
             self._pg_dist_node = {r[1]: PgDistNode(r[1], r[2], r[3], 'after_promote', r[0]) for r in rows}
         return True
 
-    def sync_meta_data(self, cluster: Cluster) -> None:
+    def sync_pg_dist_node(self, cluster: Cluster) -> None:
-        """Maintain the ``pg_dist_node`` from the coordinator leader every heartbeat loop.
+        """Maintain the `pg_dist_node` from the coordinator leader every heartbeat loop.
 
         We can't always rely on REST API calls from worker nodes in order
         to maintain `pg_dist_node`, therefore at least once per heartbeat
@@ -323,16 +296,16 @@ class CitusHandler(Citus, AbstractMPPHandler, Thread):
         with self._condition:
             i = self.find_task_by_group(task.group)
 
-            # The `PgDistNode.timeout` == None is an indicator that it was scheduled from the sync_meta_data().
+            # The `PgDistNode.timeout` == None is an indicator that it was scheduled from the sync_pg_dist_node().
             if task.timeout is None:
                 # We don't want to override the already existing task created from REST API.
                 if i is not None and self._tasks[i].timeout is not None:
                     return False
 
                 # There is a little race condition with tasks created from REST API - the call made "before" the member
-                # key is updated in DCS. Therefore it is possible that :func:`sync_meta_data` will try to create a task
+                # key is updated in DCS. Therefore it is possible that :func:`sync_pg_dist_node` will try to create a
-                # based on the outdated values of "state"/"role". To solve it we introduce an artificial timeout.
+                # task based on the outdated values of "state"/"role". To solve it we introduce an artificial timeout.
-                # Only when the timeout is reached new tasks could be scheduled from sync_meta_data()
+                # Only when the timeout is reached new tasks could be scheduled from sync_pg_dist_node()
                 if self._in_flight and self._in_flight.group == task.group and self._in_flight.timeout is not None\
                         and self._in_flight.deadline > time.time():
                     return False
@@ -380,10 +353,9 @@ class CitusHandler(Citus, AbstractMPPHandler, Thread):
             task.wait()
 
     def bootstrap(self) -> None:
-        """Bootstrap handler.
+        if not isinstance(self._config, dict):  # self.is_enabled()
+            return
 
-        Is called when the new cluster is initialized (through ``initdb`` or a custom bootstrap method).
-        """
         conn_kwargs = {**self._postgresql.connection_pool.conn_kwargs,
                        'options': '-c synchronous_commit=local -c statement_timeout=0'}
         if self._config['database'] != self._postgresql.database:
@@ -392,11 +364,6 @@ class CitusHandler(Citus, AbstractMPPHandler, Thread):
                 with conn.cursor() as cur:
                     cur.execute('CREATE DATABASE {0}'.format(
                         quote_ident(self._config['database'], conn)).encode('utf-8'))
-            except ProgrammingError as exc:
-                if exc.diag.sqlstate == '42P04':  # DuplicateDatabase
-                    logger.debug('Exception when creating database: %r', exc)
-                else:
-                    raise exc
             finally:
                 conn.close()
 
@@ -404,7 +371,7 @@ class CitusHandler(Citus, AbstractMPPHandler, Thread):
         conn = connect(**conn_kwargs)
         try:
             with conn.cursor() as cur:
-                cur.execute('CREATE EXTENSION IF NOT EXISTS citus')
+                cur.execute('CREATE EXTENSION citus')
 
                 superuser = self._postgresql.config.superuser
                 params = {k: superuser[k] for k in ('password', 'sslcert', 'sslkey') if k in superuser}
@@ -421,10 +388,9 @@ class CitusHandler(Citus, AbstractMPPHandler, Thread):
             conn.close()
 
     def adjust_postgres_gucs(self, parameters: Dict[str, Any]) -> None:
-        """Adjust GUCs in the current PostgreSQL configuration.
+        if not self.is_enabled():
+            return
 
-        :param parameters: dictionary of GUCs, with key as GUC name and the corresponding value as current GUC value.
-        """
         # citus extension must be on the first place in shared_preload_libraries
         shared_preload_libraries = list(filter(
             lambda el: el and el != 'citus',
@@ -442,18 +408,8 @@ class CitusHandler(Citus, AbstractMPPHandler, Thread):
         parameters['citus.local_hostname'] = self._postgresql.connection_pool.conn_kwargs.get('host', 'localhost')
 
     def ignore_replication_slot(self, slot: Dict[str, str]) -> bool:
-        """Check whether provided replication *slot* existing in the database should not be removed.
+        if isinstance(self._config, dict) and self._postgresql.is_primary() and\
-
+                slot['type'] == 'logical' and slot['database'] == self._config['database']:
-        .. note::
-            MPP database may create replication slots for its own use, for example to migrate data between workers
-            using logical replication, and we don't want to suddenly drop them.
-
-        :param slot: dictionary containing the replication slot settings, like ``name``, ``database``, ``type``, and
-                     ``plugin``.
-
-        :returns: ``True`` if the replication slots should not be removed, otherwise ``False``.
-        """
-        if self._postgresql.is_primary() and slot['type'] == 'logical' and slot['database'] == self._config['database']:
             m = CITUS_SLOT_NAME_RE.match(slot['name'])
             return bool(m and {'move': 'pgoutput', 'split': 'citus'}.get(m.group(1)) == slot['plugin'])
         return False

patroni/postgresql/config.py

@@ -9,16 +9,14 @@ import time
 from contextlib import contextmanager
 from urllib.parse import urlparse, parse_qsl, unquote
 from types import TracebackType
-from typing import Any, Callable, Collection, Dict, Iterator, List, Optional, Union, Tuple, Type, TYPE_CHECKING
+from typing import Any, Collection, Dict, Iterator, List, Optional, Union, Tuple, Type, TYPE_CHECKING
 
 from .validator import recovery_parameters, transform_postgresql_parameter_value, transform_recovery_parameter_value
-from .. import global_config
 from ..collections import CaseInsensitiveDict, CaseInsensitiveSet
 from ..dcs import Leader, Member, RemoteMember, slot_name_from_member_name
 from ..exceptions import PatroniFatalException, PostgresConnectionException
 from ..file_perm import pg_perm
-from ..utils import (compare_values, maybe_convert_from_base_unit, parse_bool, parse_int,
+from ..utils import compare_values, parse_bool, parse_int, split_host_port, uri, validate_directory, is_subpath
-                     split_host_port, uri, validate_directory, is_subpath)
 from ..validator import IntValidator, EnumValidator
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -271,29 +269,6 @@ def _bool_is_true_validator(value: Any) -> bool:
     return parse_bool(value) is True
 
 
-def get_param_diff(old_value: Any, new_value: Any,
-                   vartype: Optional[str] = None, unit: Optional[str] = None) -> Dict[str, str]:
-    """Get a dictionary representing a single PG parameter's value diff.
-
-    :param old_value: current :class:`str` parameter value.
-    :param new_value: :class:`str` value of the paramater after a restart.
-    :param vartype: the target type to parse old/new_value. See ``vartype`` argument of
-        :func:`~patroni.utils.maybe_convert_from_base_unit`.
-    :param unit: unit of *old/new_value*. See ``base_unit`` argument of
-        :func:`~patroni.utils.maybe_convert_from_base_unit`.
-
-    :returns: a :class:`dict` object that contains two keys: ``old_value`` and ``new_value``
-        with their values casted to :class:`str` and converted from base units (if possible).
-    """
-    str_value: Callable[[Any], str] = lambda x: '' if x is None else str(x)
-    return {
-        'old_value': (maybe_convert_from_base_unit(str_value(old_value), vartype, unit)
-                      if vartype else str_value(old_value)),
-        'new_value': (maybe_convert_from_base_unit(str_value(new_value), vartype, unit)
-                      if vartype else str_value(new_value))
-    }
-
-
 class ConfigHandler(object):
 
     # List of parameters which must be always passed to postmaster as command line options
@@ -361,24 +336,12 @@ class ConfigHandler(object):
 
     def load_current_server_parameters(self) -> None:
         """Read GUC's values from ``pg_settings`` when Patroni is joining the the postgres that is already running."""
-        exclude = [name.lower() for name, value in self.CMDLINE_OPTIONS.items() if value[1] == _false_validator]
+        exclude = [name.lower() for name, value in self.CMDLINE_OPTIONS.items() if value[1] == _false_validator] \
-        keep_values = {k: self._server_parameters[k] for k in exclude}
+            + [name.lower() for name in self._RECOVERY_PARAMETERS]
-        server_parameters = CaseInsensitiveDict({r[0]: r[1] for r in self._postgresql.query(
+        self._server_parameters = CaseInsensitiveDict({r[0]: r[1] for r in self._postgresql.query(
             "SELECT name, pg_catalog.current_setting(name) FROM pg_catalog.pg_settings"
             " WHERE (source IN ('command line', 'environment variable') OR sourcefile = %s)"
             " AND pg_catalog.lower(name) != ALL(%s)", self._postgresql_conf, exclude)})
-        recovery_params = CaseInsensitiveDict({k: server_parameters.pop(k) for k in self._RECOVERY_PARAMETERS
-                                               if k in server_parameters})
-        # We also want to load current settings of recovery parameters, including primary_conninfo
-        # and primary_slot_name, otherwise patronictl restart will update postgresql.conf
-        # and remove them, what in the worst case will cause another restart.
-        # We are doing it only for PostgresSQL v12 onwards, because older version still have recovery.conf
-        if not self._postgresql.is_primary() and self._postgresql.major_version >= 120000:
-            # primary_conninfo is expected to be a dict, therefore we need to parse it
-            recovery_params['primary_conninfo'] = parse_dsn(recovery_params.pop('primary_conninfo', '')) or {}
-            self._recovery_params = recovery_params
-
-        self._server_parameters = CaseInsensitiveDict({**server_parameters, **keep_values})
 
     def setup_server_parameters(self) -> None:
         self._server_parameters = self.get_server_parameters(self._config)
@@ -632,7 +595,7 @@ class ConfigHandler(object):
         is_remote_member = isinstance(member, RemoteMember)
         primary_conninfo = self.primary_conninfo_params(member)
         if primary_conninfo:
-            use_slots = global_config.use_slots and self._postgresql.major_version >= 90400
+            use_slots = self.get('use_slots', True) and self._postgresql.major_version >= 90400
             if use_slots and not (is_remote_member and member.no_replication_slot):
                 primary_slot_name = member.primary_slot_name if is_remote_member else self._postgresql.name
                 recovery_params['primary_slot_name'] = slot_name_from_member_name(primary_slot_name)
@@ -967,10 +930,10 @@ class ConfigHandler(object):
         parameters = config['parameters'].copy()
         listen_addresses, port = split_host_port(config['listen'], 5432)
         parameters.update(cluster_name=self._postgresql.scope, listen_addresses=listen_addresses, port=str(port))
-        if global_config.is_synchronous_mode:
+        if not self._postgresql.global_config or self._postgresql.global_config.is_synchronous_mode:
             synchronous_standby_names = self._server_parameters.get('synchronous_standby_names')
             if synchronous_standby_names is None:
-                if global_config.is_synchronous_mode_strict\
+                if self._postgresql.global_config and self._postgresql.global_config.is_synchronous_mode_strict\
                         and self._postgresql.role in ('master', 'primary', 'promoted'):
                     parameters['synchronous_standby_names'] = '*'
                 else:
@@ -992,7 +955,7 @@ class ConfigHandler(object):
             wal_keep_size = parse_int(parameters.pop('wal_keep_size', self.CMDLINE_OPTIONS['wal_keep_size'][0]), 'MB')
             parameters.setdefault('wal_keep_segments', int(((wal_keep_size or 0) + 8) / 16))
 
-        self._postgresql.mpp_handler.adjust_postgres_gucs(parameters)
+        self._postgresql.citus_handler.adjust_postgres_gucs(parameters)
 
         ret = CaseInsensitiveDict({k: v for k, v in parameters.items() if not self._postgresql.major_version
                                    or self._postgresql.major_version >= self.CMDLINE_OPTIONS.get(k, (0, 1, 90100))[2]})
@@ -1101,15 +1064,13 @@ class ConfigHandler(object):
     def reload_config(self, config: Dict[str, Any], sighup: bool = False) -> None:
         self._superuser = config['authentication'].get('superuser', {})
         server_parameters = self.get_server_parameters(config)
-        params_skip_changes = CaseInsensitiveSet((*self._RECOVERY_PARAMETERS, 'hot_standby', 'wal_log_hints'))
 
-        conf_changed = hba_changed = ident_changed = local_connection_address_changed = False
+        conf_changed = hba_changed = ident_changed = local_connection_address_changed = pending_restart = False
-        param_diff = CaseInsensitiveDict()
         if self._postgresql.state == 'running':
             changes = CaseInsensitiveDict({p: v for p, v in server_parameters.items()
-                                           if p not in params_skip_changes})
+                                           if p.lower() not in self._RECOVERY_PARAMETERS})
             changes.update({p: None for p in self._server_parameters.keys()
-                            if not (p in changes or p in params_skip_changes)})
+                            if not (p in changes or p.lower() in self._RECOVERY_PARAMETERS)})
             if changes:
                 undef = []
                 if 'wal_buffers' in changes:  # we need to calculate the default value of wal_buffers
@@ -1128,28 +1089,20 @@ class ConfigHandler(object):
                         if new_value is None or not compare_values(r[3], r[2], r[1], new_value):
                             conf_changed = True
                             if r[4] == 'postmaster':
-                                param_diff[r[0]] = get_param_diff(r[1], new_value, r[3], r[2])
+                                pending_restart = True
-                                logger.info("Changed %s from '%s' to '%s' (restart might be required)",
+                                logger.info('Changed %s from %s to %s (restart might be required)',
-                                            r[0], param_diff[r[0]]['old_value'], new_value)
+                                            r[0], r[1], new_value)
                                 if config.get('use_unix_socket') and r[0] == 'unix_socket_directories'\
                                         or r[0] in ('listen_addresses', 'port'):
                                     local_connection_address_changed = True
                             else:
-                                logger.info("Changed %s from '%s' to '%s'",
+                                logger.info('Changed %s from %s to %s', r[0], r[1], new_value)
-                                            r[0], maybe_convert_from_base_unit(r[1], r[3], r[2]), new_value)
-                        elif r[0] in self._server_parameters \
-                                and not compare_values(r[3], r[2], r[1], self._server_parameters[r[0]]):
-                            # Check if any parameter was set back to the current pg_settings value
-                            # We can use pg_settings value here, as it is proved to be equal to new_value
-                            logger.info("Changed %s from '%s' to '%s'", r[0], self._server_parameters[r[0]], new_value)
-                            conf_changed = True
                 for param, value in changes.items():
                     if '.' in param:
-                        # Check that user-defined-parameters have changed (parameters with period in name)
+                        # Check that user-defined-paramters have changed (parameters with period in name)
                         if value is None or param not in self._server_parameters \
                                 or str(value) != str(self._server_parameters[param]):
-                            logger.info("Changed %s from '%s' to '%s'",
+                            logger.info('Changed %s from %s to %s', param, self._server_parameters.get(param), value)
-                                        param, self._server_parameters.get(param), value)
                             conf_changed = True
                     elif param in server_parameters:
                         logger.warning('Removing invalid parameter `%s` from postgresql.parameters', param)
@@ -1164,6 +1117,7 @@ class ConfigHandler(object):
                 ident_changed = self._config.get('pg_ident', []) != config['pg_ident']
 
         self._config = config
+        self._postgresql.set_pending_restart(pending_restart)
         self._server_parameters = server_parameters
         self._adjust_recovery_parameters()
         self._krbsrvname = config.get('krbsrvname')
@@ -1193,28 +1147,16 @@ class ConfigHandler(object):
             if self._postgresql.major_version >= 90500:
                 time.sleep(1)
                 try:
-                    settings_diff: CaseInsensitiveDict = CaseInsensitiveDict()
+                    pending_restart = self._postgresql.query(
-                    for param, value, unit, vartype in self._postgresql.query(
+                        'SELECT COUNT(*) FROM pg_catalog.pg_settings'
-                            'SELECT name, pg_catalog.current_setting(name), unit, vartype FROM pg_catalog.pg_settings'
+                        ' WHERE pg_catalog.lower(name) != ALL(%s) AND pending_restart',
-                            ' WHERE pg_catalog.lower(name) != ALL(%s) AND pending_restart',
+                        [n.lower() for n in self._RECOVERY_PARAMETERS])[0][0] > 0
-                            [n.lower() for n in params_skip_changes]):
+                    self._postgresql.set_pending_restart(pending_restart)
-                        new_value = self._postgresql.get_guc_value(param)
-                        new_value = '?' if new_value is None else new_value
-                        settings_diff[param] = get_param_diff(value, new_value, vartype, unit)
-                    external_change = {param: value for param, value in settings_diff.items()
-                                       if param not in param_diff or value != param_diff[param]}
-                    if external_change:
-                        logger.info("PostgreSQL configuration parameters requiring restart"
-                                    " (%s) seem to be changed bypassing Patroni config."
-                                    " Setting 'Pending restart' flag", ', '.join(external_change))
-                    param_diff = settings_diff
                 except Exception as e:
                     logger.warning('Exception %r when running query', e)
         else:
             logger.info('No PostgreSQL configuration items changed, nothing to reload.')
 
-        self._postgresql.set_pending_restart_reason(param_diff)
-
     def set_synchronous_standby_names(self, value: Optional[str]) -> Optional[bool]:
         """Updates synchronous_standby_names and reloads if necessary.
         :returns: True if value was updated."""
@@ -1257,7 +1199,6 @@ class ConfigHandler(object):
         data = self._postgresql.controldata()
         effective_configuration = self._server_parameters.copy()
 
-        param_diff = CaseInsensitiveDict()
         for name, cname in options_mapping.items():
             value = parse_int(effective_configuration[name])
             if cname not in data:
@@ -1267,10 +1208,7 @@ class ConfigHandler(object):
             cvalue = parse_int(data[cname])
             if cvalue is not None and value is not None and cvalue > value:
                 effective_configuration[name] = cvalue
-                logger.info("%s value in pg_controldata: %d, in the global configuration: %d."
+                self._postgresql.set_pending_restart(True)
-                            " pg_controldata value will be used. Setting 'Pending restart' flag", name, cvalue, value)
-                param_diff[name] = get_param_diff(cvalue, value)
-        self._postgresql.set_pending_restart_reason(param_diff)
 
         # If we are using custom bootstrap with PITR it could fail when values like max_connections
         # are increased, therefore we disable hot_standby if recovery_target_action == 'promote'.
@@ -1287,6 +1225,7 @@ class ConfigHandler(object):
 
             if disable_hot_standby:
                 effective_configuration['hot_standby'] = 'off'
+                self._postgresql.set_pending_restart(True)
 
         return effective_configuration
 

patroni/postgresql/mpp/__init__.py

@@ -1,315 +0,0 @@
-"""Abstract classes for MPP handler.
-
-MPP stands for Massively Parallel Processing, and Citus belongs to this architecture. Currently, Citus is the only
-supported MPP cluster. However, we may consider adapting other databases such as TimescaleDB, GPDB, etc. into Patroni.
-"""
-import abc
-
-from typing import Any, Dict, Iterator, Optional, Union, Tuple, Type, TYPE_CHECKING
-
-from ...dcs import Cluster
-from ...dynamic_loader import iter_classes
-from ...exceptions import PatroniException
-
-if TYPE_CHECKING:  # pragma: no cover
-    from .. import Postgresql
-    from ...config import Config
-
-
-class AbstractMPP(abc.ABC):
-    """An abstract class which should be passed to :class:`AbstractDCS`.
-
-    .. note::
-        We create :class:`AbstractMPP` and :class:`AbstractMPPHandler` to solve the chicken-egg initialization problem.
-        When initializing DCS, we dynamically create an object implementing :class:`AbstractMPP`, later this object is
-        used to instantiate an object implementing :class:`AbstractMPPHandler`.
-    """
-
-    group_re: Any  # re.Pattern[str]
-
-    def __init__(self, config: Dict[str, Union[str, int]]) -> None:
-        """Init method for :class:`AbstractMPP`.
-
-        :param config: configuration of MPP section.
-        """
-        self._config = config
-
-    def is_enabled(self) -> bool:
-        """Check if MPP is enabled for a given MPP.
-
-        .. note::
-            We just check that the :attr:`_config` object isn't empty and expect
-            it to be empty only in case of :class:`Null`.
-
-        :returns: ``True`` if MPP is enabled, otherwise ``False``.
-        """
-        return bool(self._config)
-
-    @staticmethod
-    @abc.abstractmethod
-    def validate_config(config: Any) -> bool:
-        """Check whether provided config is good for a given MPP.
-
-        :param config: configuration of MPP section.
-
-        :returns: ``True`` is config passes validation, otherwise ``False``.
-        """
-
-    @property
-    @abc.abstractmethod
-    def group(self) -> Any:
-        """The group for a given MPP implementation."""
-
-    @property
-    @abc.abstractmethod
-    def coordinator_group_id(self) -> Any:
-        """The group id of the coordinator PostgreSQL cluster."""
-
-    @property
-    def type(self) -> str:
-        """The type of the MPP cluster.
-
-        :returns: A string representation of the type of a given MPP implementation.
-        """
-        for base in self.__class__.__bases__:
-            if not base.__name__.startswith('Abstract'):
-                return base.__name__
-        return self.__class__.__name__
-
-    @property
-    def k8s_group_label(self):
-        """Group label used for kubernetes DCS of the MPP cluster.
-
-        :returns: A string representation of the k8s group label of a given MPP implementation.
-        """
-        return self.type.lower() + '-group'
-
-    def is_coordinator(self) -> bool:
-        """Check whether this node is running in the coordinator PostgreSQL cluster.
-
-        :returns: ``True`` if MPP is enabled and the group id of this node
-                  matches with the :attr:`coordinator_group_id`, otherwise ``False``.
-        """
-        return self.is_enabled() and self.group == self.coordinator_group_id
-
-    def is_worker(self) -> bool:
-        """Check whether this node is running as a MPP worker PostgreSQL cluster.
-
-        :returns: ``True`` if MPP is enabled and this node is known to be not running
-                  as the coordinator PostgreSQL cluster, otherwise ``False``.
-        """
-        return self.is_enabled() and not self.is_coordinator()
-
-    def _get_handler_cls(self) -> Iterator[Type['AbstractMPPHandler']]:
-        """Find Handler classes inherited from a class type of this object.
-
-        :yields: handler classes for this object.
-        """
-        for cls in self.__class__.__subclasses__():
-            if issubclass(cls, AbstractMPPHandler) and cls.__name__.startswith(self.__class__.__name__):
-                yield cls
-
-    def get_handler_impl(self, postgresql: 'Postgresql') -> 'AbstractMPPHandler':
-        """Find and instantiate Handler implementation of this object.
-
-        :param postgresql: a reference to :class:`Postgresql` object.
-
-        :raises:
-            :exc:`PatroniException`: if the Handler class haven't been found.
-
-        :returns: an instantiated class that implements Handler for this object.
-        """
-        for cls in self._get_handler_cls():
-            return cls(postgresql, self._config)
-        raise PatroniException(f'Failed to initialize {self.__class__.__name__}Handler object')
-
-
-class AbstractMPPHandler(AbstractMPP):
-    """An abstract class which defines interfaces that should be implemented by real handlers."""
-
-    def __init__(self, postgresql: 'Postgresql', config: Dict[str, Union[str, int]]) -> None:
-        """Init method for :class:`AbstractMPPHandler`.
-
-        :param postgresql: a reference to :class:`Postgresql` object.
-        :param config: configuration of MPP section.
-        """
-        super().__init__(config)
-        self._postgresql = postgresql
-
-    @abc.abstractmethod
-    def handle_event(self, cluster: Cluster, event: Dict[str, Any]) -> None:
-        """Handle an event sent from a worker node.
-
-        :param cluster: the currently known cluster state from DCS.
-        :param event: the event to be handled.
-        """
-
-    @abc.abstractmethod
-    def sync_meta_data(self, cluster: Cluster) -> None:
-        """Sync meta data on the coordinator.
-
-        :param cluster: the currently known cluster state from DCS.
-        """
-
-    @abc.abstractmethod
-    def on_demote(self) -> None:
-        """On demote handler.
-
-        Is called when the primary was demoted.
-        """
-
-    @abc.abstractmethod
-    def schedule_cache_rebuild(self) -> None:
-        """Cache rebuild handler.
-
-        Is called to notify handler that it has to refresh its metadata cache from the database.
-        """
-
-    @abc.abstractmethod
-    def bootstrap(self) -> None:
-        """Bootstrap handler.
-
-        Is called when the new cluster is initialized (through ``initdb`` or a custom bootstrap method).
-        """
-
-    @abc.abstractmethod
-    def adjust_postgres_gucs(self, parameters: Dict[str, Any]) -> None:
-        """Adjust GUCs in the current PostgreSQL configuration.
-
-        :param parameters: dictionary of GUCs, with key as GUC name and the corresponding value as current GUC value.
-        """
-
-    @abc.abstractmethod
-    def ignore_replication_slot(self, slot: Dict[str, str]) -> bool:
-        """Check whether provided replication *slot* existing in the database should not be removed.
-
-        .. note::
-            MPP database may create replication slots for its own use, for example to migrate data between workers
-            using logical replication, and we don't want to suddenly drop them.
-
-        :param slot: dictionary containing the replication slot settings, like ``name``, ``database``, ``type``, and
-                     ``plugin``.
-
-        :returns: ``True`` if the replication slots should not be removed, otherwise ``False``.
-        """
-
-
-class Null(AbstractMPP):
-    """Dummy implementation of :class:`AbstractMPP`."""
-
-    def __init__(self) -> None:
-        """Init method for :class:`Null`."""
-        super().__init__({})
-
-    @staticmethod
-    def validate_config(config: Any) -> bool:
-        """Check whether provided config is good for :class:`Null`.
-
-        :returns: always ``True``.
-        """
-        return True
-
-    @property
-    def group(self) -> None:
-        """The group for :class:`Null`.
-
-        :returns: always ``None``.
-        """
-        return None
-
-    @property
-    def coordinator_group_id(self) -> None:
-        """The group id of the coordinator PostgreSQL cluster.
-
-        :returns: always ``None``.
-        """
-        return None
-
-
-class NullHandler(Null, AbstractMPPHandler):
-    """Dummy implementation of :class:`AbstractMPPHandler`."""
-
-    def __init__(self, postgresql: 'Postgresql', config: Dict[str, Union[str, int]]) -> None:
-        """Init method for :class:`NullHandler`.
-
-        :param postgresql: a reference to :class:`Postgresql` object.
-        :param config: configuration of MPP section.
-        """
-        AbstractMPPHandler.__init__(self, postgresql, config)
-
-    def handle_event(self, cluster: Cluster, event: Dict[str, Any]) -> None:
-        """Handle an event sent from a worker node.
-
-        :param cluster: the currently known cluster state from DCS.
-        :param event: the event to be handled.
-        """
-
-    def sync_meta_data(self, cluster: Cluster) -> None:
-        """Sync meta data on the coordinator.
-
-        :param cluster: the currently known cluster state from DCS.
-        """
-
-    def on_demote(self) -> None:
-        """On demote handler.
-
-        Is called when the primary was demoted.
-        """
-
-    def schedule_cache_rebuild(self) -> None:
-        """Cache rebuild handler.
-
-        Is called to notify handler that it has to refresh its metadata cache from the database.
-        """
-
-    def bootstrap(self) -> None:
-        """Bootstrap handler.
-
-        Is called when the new cluster is initialized (through ``initdb`` or a custom bootstrap method).
-        """
-
-    def adjust_postgres_gucs(self, parameters: Dict[str, Any]) -> None:
-        """Adjust GUCs in the current PostgreSQL configuration.
-
-        :param parameters: dictionary of GUCs, with key as GUC name and corresponding value as current GUC value.
-        """
-
-    def ignore_replication_slot(self, slot: Dict[str, str]) -> bool:
-        """Check whether provided replication *slot* existing in the database should not be removed.
-
-        .. note::
-            MPP database may create replication slots for its own use, for example to migrate data between workers
-            using logical replication, and we don't want to suddenly drop them.
-
-        :param slot: dictionary containing the replication slot settings, like ``name``, ``database``, ``type``, and
-                     ``plugin``.
-
-        :returns: always ``False``.
-        """
-        return False
-
-
-def iter_mpp_classes(
-        config: Optional[Union['Config', Dict[str, Any]]] = None
-) -> Iterator[Tuple[str, Type[AbstractMPP]]]:
-    """Attempt to import MPP modules that are present in the given configuration.
-
-    :param config: configuration information with possible MPP names as keys. If given, only attempt to import MPP
-                   modules defined in the configuration. Else, if ``None``, attempt to import any supported MPP module.
-
-    :yields: tuples, each containing the module ``name`` and the imported MPP class object.
-    """
-    yield from iter_classes(__package__, AbstractMPP, config)
-
-
-def get_mpp(config: Union['Config', Dict[str, Any]]) -> AbstractMPP:
-    """Attempt to load and instantiate a MPP module from known available implementations.
-
-    :param config: object or dictionary with Patroni configuration.
-
-    :returns: The successfully loaded MPP or fallback to :class:`Null`.
-    """
-    for name, mpp_class in iter_mpp_classes(config):
-        if mpp_class.validate_config(config[name]):
-            return mpp_class(config[name])
-    return Null()

patroni/postgresql/postmaster.py

@@ -176,7 +176,7 @@ class PostmasterProcess(psutil.Process):
             return not self.is_running()
 
     def wait_for_user_backends_to_close(self, stop_timeout: Optional[float]) -> None:
-        # These regexps are cross checked against versions PostgreSQL 9.1 .. 16
+        # These regexps are cross checked against versions PostgreSQL 9.1 .. 15
         aux_proc_re = re.compile("(?:postgres:)( .*:)? (?:(?:archiver|startup|autovacuum launcher|autovacuum worker|"
                                  "checkpointer|logger|stats collector|wal receiver|wal writer|writer)(?: process  )?|"
                                  "walreceiver|wal sender process|walsender|walwriter|background writer|"

patroni/postgresql/slots.py

@@ -13,11 +13,9 @@ from typing import Any, Dict, Iterator, List, Optional, Union, Tuple, TYPE_CHECK
 
 from .connection import get_connection_cursor
 from .misc import format_lsn, fsync_dir
-from .. import global_config
 from ..dcs import Cluster, Leader
 from ..file_perm import pg_perm
 from ..psycopg import OperationalError
-from ..tags import Tags
 
 if TYPE_CHECKING:  # pragma: no cover
     from psycopg import Cursor
@@ -291,18 +289,18 @@ class SlotsHandler:
         :param name: name of the slot to ignore
 
         :returns: ``True`` if slot *name* matches any slot specified in ``ignore_slots`` configuration,
-                 otherwise will pass through and return result of :meth:`AbstractMPPHandler.ignore_replication_slot`.
+                 otherwise will pass through and return result of :meth:`CitusHandler.ignore_replication_slot`.
         """
         slot = self._replication_slots[name]
         if cluster.config:
-            for matcher in global_config.ignore_slots_matchers:
+            for matcher in cluster.config.ignore_slots_matchers:
                 if (
                         (matcher.get("name") is None or matcher["name"] == name)
                         and all(not matcher.get(a) or matcher[a] == slot.get(a)
                                 for a in ('database', 'plugin', 'type'))
                 ):
                     return True
-        return self._postgresql.mpp_handler.ignore_replication_slot(slot)
+        return self._postgresql.citus_handler.ignore_replication_slot(slot)
 
     def drop_replication_slot(self, name: str) -> Tuple[bool, bool]:
         """Drop a named slot from Postgres.
@@ -321,7 +319,7 @@ class SlotsHandler:
                             ' FULL OUTER JOIN dropped ON true'), name)
         return (rows[0][0], rows[0][1]) if rows else (False, False)
 
-    def _drop_incorrect_slots(self, cluster: Cluster, slots: Dict[str, Any]) -> None:
+    def _drop_incorrect_slots(self, cluster: Cluster, slots: Dict[str, Any], paused: bool) -> None:
         """Compare required slots and configured as permanent slots with those found, dropping extraneous ones.
 
         .. note::
@@ -332,10 +330,11 @@ class SlotsHandler:
 
         :param cluster: cluster state information object.
         :param slots: dictionary of desired slot names as keys with slot attributes as a dictionary value, if known.
+        :param paused: ``True`` if the patroni cluster is currently in a paused state.
         """
         # drop old replication slots which are not presented in desired slots.
         for name in set(self._replication_slots) - set(slots):
-            if not global_config.is_paused and not self.ignore_replication_slot(cluster, name):
+            if not paused and not self.ignore_replication_slot(cluster, name):
                 active, dropped = self.drop_replication_slot(name)
                 if dropped:
                     logger.info("Dropped unknown replication slot '%s'", name)
@@ -493,7 +492,8 @@ class SlotsHandler:
             self._schedule_load_slots = True
         return create_slots + copy_slots
 
-    def sync_replication_slots(self, cluster: Cluster, tags: Tags) -> List[str]:
+    def sync_replication_slots(self, cluster: Cluster, nofailover: bool,
+                               replicatefrom: Optional[str] = None, paused: bool = False) -> List[str]:
         """During the HA loop read, check and alter replication slots found in the cluster.
 
         Read physical and logical slots from ``pg_replication_slots``, then compare to those configured in the DCS.
@@ -503,18 +503,22 @@ class SlotsHandler:
         them on replica nodes by copying slot files from the primary.
 
         :param cluster: object containing stateful information for the cluster.
-        :param tags: reference to an object implementing :class:`Tags` interface.
+        :param nofailover: ``True`` if this node has been tagged to not be a failover candidate.
+        :param replicatefrom: the tag containing the node to replicate from.
+        :param paused: ``True`` if the cluster is in maintenance mode.
 
         :returns: list of logical replication slots names that should be copied from the primary.
         """
         ret = []
-        if self._postgresql.major_version >= 90400 and cluster.config:
+        if self._postgresql.major_version >= 90400 and self._postgresql.global_config and cluster.config:
             try:
                 self.load_replication_slots()
 
-                slots = cluster.get_replication_slots(self._postgresql, tags, show_error=True)
+                slots = cluster.get_replication_slots(
+                    self._postgresql.name, self._postgresql.role, nofailover, self._postgresql.major_version,
+                    is_standby_cluster=self._postgresql.global_config.is_standby_cluster, show_error=True)
 
-                self._drop_incorrect_slots(cluster, slots)
+                self._drop_incorrect_slots(cluster, slots, paused)
 
                 self._ensure_physical_slots(slots)
 
@@ -522,7 +526,7 @@ class SlotsHandler:
                     self._logical_slots_processing_queue.clear()
                     self._ensure_logical_slots_primary(slots)
                 else:
-                    self.check_logical_slots_readiness(cluster, tags)
+                    self.check_logical_slots_readiness(cluster, replicatefrom)
                     ret = self._ensure_logical_slots_replica(slots)
 
                 self._replication_slots = slots
@@ -548,7 +552,7 @@ class SlotsHandler:
         with get_connection_cursor(connect_timeout=3, options="-c statement_timeout=2000", **conn_kwargs) as cur:
             yield cur
 
-    def check_logical_slots_readiness(self, cluster: Cluster, tags: Tags) -> bool:
+    def check_logical_slots_readiness(self, cluster: Cluster, replicatefrom: Optional[str]) -> bool:
         """Determine whether all known logical slots are synchronised from the leader.
 
         1) Retrieve the current ``catalog_xmin`` value for the physical slot from the cluster leader, and
@@ -557,13 +561,13 @@ class SlotsHandler:
         3) store logical slot ``catalog_xmin`` when the physical slot ``catalog_xmin`` becomes valid.
 
         :param cluster: object containing stateful information for the cluster.
-        :param tags: reference to an object implementing :class:`Tags` interface.
+        :param replicatefrom: name of the member that should be used to replicate from.
 
         :returns: ``False`` if any issue while checking logical slots readiness, ``True`` otherwise.
         """
         catalog_xmin = None
         if self._logical_slots_processing_queue and cluster.leader:
-            slot_name = cluster.get_slot_name_on_primary(self._postgresql.name, tags)
+            slot_name = cluster.get_my_slot_name_on_primary(self._postgresql.name, replicatefrom)
             try:
                 with self._get_leader_connection_cursor(cluster.leader) as cur:
                     cur.execute("SELECT slot_name, catalog_xmin FROM pg_catalog.pg_get_replication_slots()"
@@ -641,17 +645,16 @@ class SlotsHandler:
                 if standby_logical_slot:
                     logger.info('Logical slot %s is safe to be used after a failover', name)
 
-    def copy_logical_slots(self, cluster: Cluster, tags: Tags, create_slots: List[str]) -> None:
+    def copy_logical_slots(self, cluster: Cluster, create_slots: List[str]) -> None:
         """Create logical replication slots on standby nodes.
 
         :param cluster: object containing stateful information for the cluster.
-        :param tags: reference to an object implementing :class:`Tags` interface.
         :param create_slots: list of slot names to copy from the primary.
         """
         leader = cluster.leader
         if not leader:
             return
-        slots = cluster.get_replication_slots(self._postgresql, tags, role='replica')
+        slots = cluster.get_replication_slots(self._postgresql.name, 'replica', False, self._postgresql.major_version)
         copy_slots: Dict[str, Dict[str, Any]] = {}
         with self._get_leader_connection_cursor(leader) as cur:
             try:

patroni/postgresql/sync.py

@@ -5,7 +5,6 @@ import time
 from copy import deepcopy
 from typing import Collection, List, NamedTuple, Tuple, TYPE_CHECKING
 
-from .. import global_config
 from ..collections import CaseInsensitiveDict, CaseInsensitiveSet
 from ..dcs import Cluster
 from ..psycopg import quote_ident as _quote_ident
@@ -304,8 +303,11 @@ END;$$""")
         replica_list = _ReplicaList(self._postgresql, cluster)
         self._process_replica_readiness(cluster, replica_list)
 
-        sync_node_count = global_config.synchronous_node_count if self._postgresql.supports_multiple_sync else 1
+        if TYPE_CHECKING:  # pragma: no cover
-        sync_node_maxlag = global_config.maximum_lag_on_syncnode
+            assert self._postgresql.global_config is not None
+        sync_node_count = self._postgresql.global_config.synchronous_node_count\
+            if self._postgresql.supports_multiple_sync else 1
+        sync_node_maxlag = self._postgresql.global_config.maximum_lag_on_syncnode
 
         candidates = CaseInsensitiveSet()
         sync_nodes = CaseInsensitiveSet()

patroni/scripts/barman_recover.py

@@ -1,468 +0,0 @@
-#!/usr/bin/env python
-
-"""Restore a Barman backup to the local node through ``pg-backup-api``.
-
-This script can be used both as a custom bootstrap method, and as a custom
-create replica method. Check the output of ``--help`` to understand the
-parameters supported by the script. ``--datadir`` is a special parameter and it
-is automatically filled by Patroni in both cases.
-
-It requires that you have previously configured a Barman server, and that you
-have ``pg-backup-api`` configured and running in the same host as Barman.
-
-Refer to :class:`ExitCode` for possible exit codes of this script.
-"""
-from argparse import ArgumentParser
-from enum import IntEnum
-import json
-import logging
-import sys
-import time
-from typing import Any, Callable, Optional, Tuple, Type, Union
-from urllib.parse import urljoin
-from urllib3 import PoolManager
-from urllib3.exceptions import MaxRetryError
-from urllib3.response import HTTPResponse
-
-
-class ExitCode(IntEnum):
-    """Possible exit codes of this script.
-
-    :cvar RECOVERY_DONE: backup was successfully restored.
-    :cvar RECOVERY_FAILED: recovery of the backup faced an issue.
-    :cvar API_NOT_OK: ``pg-backup-api`` status is not ``OK``.
-    :cvar HTTP_REQUEST_ERROR: an error has occurred during a request to the
-        ``pg-backup-api``.
-    :cvar HTTP_RESPONSE_MALFORMED: ``pg-backup-api`` returned a bogus response.
-    """
-
-    RECOVERY_DONE = 0
-    RECOVERY_FAILED = 1
-    API_NOT_OK = 2
-    HTTP_REQUEST_ERROR = 3
-    HTTP_RESPONSE_MALFORMED = 4
-
-
-class RetriesExceeded(Exception):
-    """Maximum number of retries exceeded."""
-
-
-def retry(exceptions: Union[Type[Exception], Tuple[Type[Exception], ...]]) \
-        -> Any:
-    """Retry an operation n times if expected *exceptions* are faced.
-
-    .. note::
-        Should be used as a decorator of a class' method as it expects the
-        first argument to be a class instance.
-
-        The class which method is going to be decorated should contain a couple
-        attributes:
-
-        * ``max_retries``: maximum retry attempts before failing;
-        * ``retry_wait``: how long to wait before retrying.
-
-    :param exceptions: exceptions that could trigger a retry attempt.
-
-    :raises:
-        :exc:`RetriesExceeded`: if the maximum number of attempts has been
-            exhausted.
-    """
-    def decorator(func: Callable[..., Any]) -> Any:
-        def inner_func(instance: object, *args: Any, **kwargs: Any) -> Any:
-            times: int = getattr(instance, "max_retries")
-            retry_wait: int = getattr(instance, "retry_wait")
-            method_name = f"{instance.__class__.__name__}.{func.__name__}"
-
-            attempt = 1
-
-            while attempt <= times:
-                try:
-                    return func(instance, *args, **kwargs)
-                except exceptions as exc:
-                    logging.warning("Attempt %d of %d on method %s failed "
-                                    "with %r.",
-                                    attempt, times, method_name, exc)
-                    attempt += 1
-
-                time.sleep(retry_wait)
-
-            raise RetriesExceeded("Maximum number of retries exceeded for "
-                                  f"method {method_name}.")
-        return inner_func
-    return decorator
-
-
-class BarmanRecover:
-    """Facilities for performing a remote ``barman recover`` operation.
-
-    You should instantiate this class, which will take care of configuring the
-    operation accordingly. When you want to start the operation, you should
-    call :meth:`restore_backup`. At any point of interaction with this class,
-    you may face a :func:`sys.exit` call. Refer to :class:`ExitCode` for a view
-    on the possible exit codes.
-
-    :ivar api_url: base URL to reach the ``pg-backup-api``.
-    :ivar cert_file: certificate to authenticate against the
-        ``pg-backup-api``, if required.
-    :ivar key_file: certificate key to authenticate against the
-        ``pg-backup-api``, if required.
-    :ivar barman_server: name of the Barman server which backup is to be
-        restored.
-    :ivar backup_id: ID of the backup from the Barman server.
-    :ivar ssh_command: SSH command to connect from the Barman host to the
-        local host.
-    :ivar data_directory: path to the Postgres data directory where to
-        restore the backup at.
-    :ivar loop_wait: how long to wait before checking again the status of the
-        recovery process. Higher values are useful for backups that are
-        expected to take long to restore.
-    :ivar retry_wait: how long to wait before retrying a failed request to the
-        ``pg-backup-api``.
-    :ivar max_retries: maximum number of retries when ``pg-backup-api`` returns
-        malformed responses.
-    :ivar http: a HTTP pool manager for performing web requests.
-    """
-
-    def __init__(self, api_url: str, barman_server: str, backup_id: str,
-                 ssh_command: str, data_directory: str, loop_wait: int,
-                 retry_wait: int, max_retries: int,
-                 cert_file: Optional[str] = None,
-                 key_file: Optional[str] = None) -> None:
-        """Create a new instance of :class:`BarmanRecover`.
-
-        Make sure the ``pg-backup-api`` is reachable and running fine.
-
-        :param api_url: base URL to reach the ``pg-backup-api``.
-        :param barman_server: name of the Barman server which backup is to be
-            restored.
-        :param backup_id: ID of the backup from the Barman server.
-        :param ssh_command: SSH command to connect from the Barman host to the
-            local host.
-        :param data_directory: path to the Postgres data directory where to
-            restore the backup at.
-        :param loop_wait: how long to wait before checking again the status of
-            the recovery process. Higher values are useful for backups that are
-            expected to take long to restore.
-        :param retry_wait: how long to wait before retrying a failed request to
-            the ``pg-backup-api``.
-        :param max_retries: maximum number of retries when ``pg-backup-api``
-            returns malformed responses.
-        :param cert_file: certificate to authenticate against the
-            ``pg-backup-api``, if required.
-        :param key_file: certificate key to authenticate against the
-            ``pg-backup-api``, if required.
-        """
-        self.api_url = api_url
-        self.cert_file = cert_file
-        self.key_file = key_file
-        self.barman_server = barman_server
-        self.backup_id = backup_id
-        self.ssh_command = ssh_command
-        self.data_directory = data_directory
-        self.loop_wait = loop_wait
-        self.retry_wait = retry_wait
-        self.max_retries = max_retries
-        self.http = PoolManager(cert_file=cert_file, key_file=key_file)
-        self._ensure_api_ok()
-
-    def _build_full_url(self, url_path: str) -> str:
-        """Build the full URL by concatenating *url_path* with the base URL.
-
-        :param url_path: path to be accessed in the ``pg-backup-api``.
-
-        :returns: the full URL after concatenating.
-        """
-        return urljoin(self.api_url, url_path)
-
-    @staticmethod
-    def _deserialize_response(response: HTTPResponse) -> Any:
-        """Retrieve body from *response* as a deserialized JSON object.
-
-        :param response: response from which JSON body will be deserialized.
-
-        :returns: the deserialized JSON body.
-        """
-        return json.loads(response.data.decode("utf-8"))
-
-    @staticmethod
-    def _serialize_request(body: Any) -> Any:
-        """Serialize a request body.
-
-        :param body: content of the request body to be serialized.
-
-        :returns: the serialized request body.
-        """
-        return json.dumps(body).encode("utf-8")
-
-    def _get_request(self, url_path: str) -> Any:
-        """Perform a ``GET`` request to *url_path*.
-
-        .. note::
-            If a :exc:`MaxRetryError` is faced while performing the request,
-            then exit with :attr:`ExitCode.HTTP_REQUEST_ERROR`
-
-        :param url_path: URL to perform the ``GET`` request against.
-
-        :returns: the deserialized response body.
-        """
-        response = None
-
-        try:
-            response = self.http.request("GET", self._build_full_url(url_path))
-        except MaxRetryError as exc:
-            logging.critical("An error occurred while performing an HTTP GET "
-                             "request: %r", exc)
-            sys.exit(ExitCode.HTTP_REQUEST_ERROR)
-
-        return self._deserialize_response(response)
-
-    def _post_request(self, url_path: str, body: Any) -> Any:
-        """Perform a ``POST`` request to *url_path* serializing *body* as JSON.
-
-        .. note::
-            If a :exc:`MaxRetryError` is faced while performing the request,
-            then exit with :attr:`ExitCode.HTTP_REQUEST_ERROR`
-
-        :param url_path: URL to perform the ``POST`` request against.
-        :param body: the body to be serialized as JSON and sent in the request.
-
-        :returns: the deserialized response body.
-        """
-        body = self._serialize_request(body)
-
-        response = None
-
-        try:
-            response = self.http.request("POST",
-                                         self._build_full_url(url_path),
-                                         body=body,
-                                         headers={
-                                             "Content-Type": "application/json"
-                                         })
-        except MaxRetryError as exc:
-            logging.critical("An error occurred while performing an HTTP POST "
-                             "request: %r", exc)
-            sys.exit(ExitCode.HTTP_REQUEST_ERROR)
-
-        return self._deserialize_response(response)
-
-    def _ensure_api_ok(self) -> None:
-        """Ensure ``pg-backup-api`` is reachable and ``OK``.
-
-        .. note::
-            If ``pg-backup-api`` status is not ``OK``, then exit with
-            :attr:`ExitCode.API_NOT_OK`.
-        """
-        response = self._get_request("status")
-
-        if response != "OK":
-            logging.critical("pg-backup-api is not working: %s", response)
-            sys.exit(ExitCode.API_NOT_OK)
-
-    @retry(KeyError)
-    def _create_recovery_operation(self) -> str:
-        """Create a recovery operation on the ``pg-backup-api``.
-
-        :returns: the ID of the recovery operation that has been created.
-        """
-        response = self._post_request(
-            f"servers/{self.barman_server}/operations",
-            {
-                "type": "recovery",
-                "backup_id": self.backup_id,
-                "remote_ssh_command": self.ssh_command,
-                "destination_directory": self.data_directory,
-            },
-        )
-
-        return response["operation_id"]
-
-    @retry(KeyError)
-    def _get_recovery_operation_status(self, operation_id: str) -> str:
-        """Get status of the recovery operation *operation_id*.
-
-        :param operation_id: ID of the recovery operation to be checked.
-
-        :returns: the status of the recovery operation.
-        """
-        response = self._get_request(
-            f"servers/{self.barman_server}/operations/{operation_id}",
-        )
-
-        return response["status"]
-
-    def restore_backup(self) -> bool:
-        """Restore the configured Barman backup through ``pg-backup-api``.
-
-        .. note::
-            If recovery API request returns a malformed response, then exit with
-            :attr:`ExitCode.HTTP_RESPONSE_MALFORMED`.
-
-        :returns: ``True`` if it was successfully recovered, ``False``
-            otherwise.
-        """
-        operation_id = None
-
-        try:
-            operation_id = self._create_recovery_operation()
-        except RetriesExceeded:
-            logging.critical("Maximum number of retries exceeded, exiting.")
-            sys.exit(ExitCode.HTTP_RESPONSE_MALFORMED)
-
-        logging.info("Created the recovery operation with ID %s", operation_id)
-
-        status = None
-
-        while True:
-            try:
-                status = self._get_recovery_operation_status(operation_id)
-            except RetriesExceeded:
-                logging.critical("Maximum number of retries exceeded, "
-                                 "exiting.")
-                sys.exit(ExitCode.HTTP_RESPONSE_MALFORMED)
-
-            if status != "IN_PROGRESS":
-                break
-
-            logging.info("Recovery operation %s is still in progress",
-                         operation_id)
-            time.sleep(self.loop_wait)
-
-        return status == "DONE"
-
-
-def set_up_logging(log_file: Optional[str] = None) -> None:
-    """Set up logging to file, if *log_file* is given, otherwise to console.
-
-    :param log_file: file where to log messages, if any.
-    """
-    logging.basicConfig(filename=log_file, level=logging.INFO,
-                        format="%(asctime)s %(levelname)s: %(message)s")
-
-
-def main() -> None:
-    """Entry point of this script.
-
-    Parse the command-line arguments and recover a Barman backup through
-    ``pg-backup-api`` to the local host.
-    """
-    parser = ArgumentParser(
-        epilog=(
-            "Wrapper script for ``pg-backup-api``. Communicate with the API "
-            "running  at ``--api-url`` to restore a ``--backup-id`` Barman "
-            "backup of the server ``--barman-server``."
-        ),
-    )
-    parser.add_argument(
-        "--api-url",
-        type=str,
-        required=True,
-        help="URL to reach the ``pg-backup-api``, e.g. "
-             "``http://localhost:7480``",
-        dest="api_url",
-    )
-    parser.add_argument(
-        "--cert-file",
-        type=str,
-        required=False,
-        help="Certificate to authenticate against the API, if required.",
-        dest="cert_file",
-    )
-    parser.add_argument(
-        "--key-file",
-        type=str,
-        required=False,
-        help="Certificate key to authenticate against the API, if required.",
-        dest="key_file",
-    )
-    parser.add_argument(
-        "--barman-server",
-        type=str,
-        required=True,
-        help="Name of the Barman server from which to restore the backup.",
-        dest="barman_server",
-    )
-    parser.add_argument(
-        "--backup-id",
-        type=str,
-        required=False,
-        default="latest",
-        help="ID of the Barman backup to be restored. You can use any value "
-             "supported by ``barman recover`` command "
-             "(default: ``%(default)s``)",
-        dest="backup_id",
-    )
-    parser.add_argument(
-        "--ssh-command",
-        type=str,
-        required=True,
-        help="Value to be passed as ``--remote-ssh-command`` to "
-             "``barman recover``.",
-        dest="ssh_command",
-    )
-    parser.add_argument(
-        "--data-directory",
-        "--datadir",
-        type=str,
-        required=True,
-        help="Destination path where to restore the barman backup in the "
-             "local host.",
-        dest="data_directory",
-    )
-    parser.add_argument(
-        "--log-file",
-        type=str,
-        required=False,
-        help="File where to log messages produced by this script, if any.",
-        dest="log_file",
-    )
-    parser.add_argument(
-        "--loop-wait",
-        type=int,
-        required=False,
-        default=10,
-        help="How long to wait before checking again the status of the "
-             "recovery process, in seconds. Use higher values if your "
-             "recovery is expected to take long (default: ``%(default)s``)",
-        dest="loop_wait",
-    )
-    parser.add_argument(
-        "--retry-wait",
-        type=int,
-        required=False,
-        default=2,
-        help="How long to wait before retrying a failed ``pg-backup-api`` "
-             "request (default: ``%(default)s``)",
-        dest="retry_wait",
-    )
-    parser.add_argument(
-        "--max-retries",
-        type=int,
-        required=False,
-        default=5,
-        help="Maximum number of retries when receiving malformed responses "
-             "from the ``pg-backup-api`` (default: ``%(default)s``)",
-        dest="max_retries",
-    )
-    args, _ = parser.parse_known_args()
-
-    set_up_logging(args.log_file)
-
-    barman_recover = BarmanRecover(args.api_url, args.barman_server,
-                                   args.backup_id, args.ssh_command,
-                                   args.data_directory, args.loop_wait,
-                                   args.retry_wait, args.max_retries,
-                                   args.cert_file, args.key_file)
-
-    successful = barman_recover.restore_backup()
-
-    if successful:
-        logging.info("Recovery operation finished successfully.")
-        sys.exit(ExitCode.RECOVERY_DONE)
-    else:
-        logging.critical("Recovery operation failed.")
-        sys.exit(ExitCode.RECOVERY_FAILED)
-
-
-if __name__ == "__main__":
-    main()

patroni/tags.py

@@ -22,18 +22,14 @@ class Tags(abc.ABC):
             A custom tag is any tag added to the configuration ``tags`` section that is not one of ``clonefrom``,
             ``nofailover``, ``noloadbalance`` or ``nosync``.
 
-            For most of the Patroni predefined tags, the returning object will only contain them if they are enabled as
+            For the Patroni predefined tags, the returning object will only contain them if they are enabled as they
-            they all are boolean values that default to disabled.
+            all are boolean values that default to disabled.
-            However ``nofailover`` tag is always returned if ``failover_priority`` tag is defined. In this case, we need
-            both values to see if they are contradictory and the ``nofailover`` value should be used.
 
         :returns: a dictionary of tags set for this node. The key is the tag name, and the value is the corresponding
             tag value.
         """
         return {tag: value for tag, value in tags.items()
-                if any((tag not in ('clonefrom', 'nofailover', 'noloadbalance', 'nosync'),
+                if tag not in ('clonefrom', 'nofailover', 'noloadbalance', 'nosync') or value}
-                        value,
-                        tag == 'nofailover' and 'failover_priority' in tags))}
 
     @property
     @abc.abstractmethod

patroni/utils.py

@@ -10,7 +10,6 @@
 :var WHITESPACE_RE: regular expression to match whitespace characters
 """
 import errno
-import itertools
 import logging
 import os
 import platform
@@ -25,7 +24,6 @@ from shlex import split
 
 from typing import Any, Callable, Dict, Iterator, List, Optional, Union, Tuple, Type, TYPE_CHECKING
 
-from collections import OrderedDict
 from dateutil import tz
 from json import JSONDecoder
 from urllib3.response import HTTPResponse
@@ -35,6 +33,7 @@ from .version import __version__
 
 if TYPE_CHECKING:  # pragma: no cover
     from .dcs import Cluster
+    from .config import GlobalConfig
 
 tzutc = tz.tzutc()
 
@@ -48,37 +47,6 @@ DBL_RE = re.compile(r'^[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?')
 WHITESPACE_RE = re.compile(r'[ \t\n\r]*', re.VERBOSE | re.MULTILINE | re.DOTALL)
 
 
-def get_conversion_table(base_unit: str) -> Dict[str, Dict[str, Union[int, float]]]:
-    """Get conversion table for the specified base unit.
-
-    If no conversion table exists for the passed unit, return an empty :class:`OrderedDict`.
-
-    :param base_unit: unit to choose the conversion table for.
-
-    :returns: :class:`OrderedDict` object.
-    """
-    memory_unit_conversion_table: Dict[str, Dict[str, Union[int, float]]] = OrderedDict([
-        ('TB', {'B': 1024**4, 'kB': 1024**3, 'MB': 1024**2}),
-        ('GB', {'B': 1024**3, 'kB': 1024**2, 'MB': 1024}),
-        ('MB', {'B': 1024**2, 'kB': 1024, 'MB': 1}),
-        ('kB', {'B': 1024, 'kB': 1, 'MB': 1024**-1}),
-        ('B', {'B': 1, 'kB': 1024**-1, 'MB': 1024**-2})
-    ])
-    time_unit_conversion_table: Dict[str, Dict[str, Union[int, float]]] = OrderedDict([
-        ('d', {'ms': 1000 * 60**2 * 24, 's': 60**2 * 24, 'min': 60 * 24}),
-        ('h', {'ms': 1000 * 60**2, 's': 60**2, 'min': 60}),
-        ('min', {'ms': 1000 * 60, 's': 60, 'min': 1}),
-        ('s', {'ms': 1000, 's': 1, 'min': 60**-1}),
-        ('ms', {'ms': 1, 's': 1000**-1, 'min': 1 / (1000 * 60)}),
-        ('us', {'ms': 1000**-1, 's': 1000**-2, 'min': 1 / (1000**2 * 60)})
-    ])
-    if base_unit in ('B', 'kB', 'MB'):
-        return memory_unit_conversion_table
-    elif base_unit in ('ms', 's', 'min'):
-        return time_unit_conversion_table
-    return OrderedDict()
-
-
 def deep_compare(obj1: Dict[Any, Union[Any, Dict[Any, Any]]], obj2: Dict[Any, Union[Any, Dict[Any, Any]]]) -> bool:
     """Recursively compare two dictionaries to check if they are equal in terms of keys and values.
 
@@ -305,152 +273,33 @@ def convert_to_base_unit(value: Union[int, float], unit: str, base_unit: Optiona
         >>> convert_to_base_unit(1, 'GB', '512 MB') is None
         True
     """
-    base_value, base_unit = strtol(base_unit, False)
+    convert: Dict[str, Dict[str, Union[int, float]]] = {
-    if TYPE_CHECKING:  # pragma: no cover
+        'B': {'B': 1, 'kB': 1024, 'MB': 1024 * 1024, 'GB': 1024 * 1024 * 1024, 'TB': 1024 * 1024 * 1024 * 1024},
-        assert isinstance(base_value, int)
+        'kB': {'B': 1.0 / 1024, 'kB': 1, 'MB': 1024, 'GB': 1024 * 1024, 'TB': 1024 * 1024 * 1024},
-
+        'MB': {'B': 1.0 / (1024 * 1024), 'kB': 1.0 / 1024, 'MB': 1, 'GB': 1024, 'TB': 1024 * 1024},
-    convert_tbl = get_conversion_table(base_unit)
+        'ms': {'us': 1.0 / 1000, 'ms': 1, 's': 1000, 'min': 1000 * 60, 'h': 1000 * 60 * 60, 'd': 1000 * 60 * 60 * 24},
-    # {'TB': 'GB', 'GB': 'MB', ...}
+        's': {'us': 1.0 / (1000 * 1000), 'ms': 1.0 / 1000, 's': 1, 'min': 60, 'h': 60 * 60, 'd': 60 * 60 * 24},
-    round_order = dict(zip(convert_tbl, itertools.islice(convert_tbl, 1, None)))
+        'min': {'us': 1.0 / (1000 * 1000 * 60), 'ms': 1.0 / (1000 * 60), 's': 1.0 / 60, 'min': 1, 'h': 60, 'd': 60 * 24}
-    if unit in convert_tbl and base_unit in convert_tbl[unit]:
-        value *= convert_tbl[unit][base_unit] / float(base_value)
-        if unit in round_order:
-            multiplier = convert_tbl[round_order[unit]][base_unit]
-            value = round(value / float(multiplier)) * multiplier
-        return value
-
-
-def convert_int_from_base_unit(base_value: int, base_unit: Optional[str]) -> Optional[str]:
-    """Convert an integer value in some base unit to a human-friendly unit.
-
-    The output unit is chosen so that it's the greatest unit that can represent
-    the value without loss.
-
-    :param base_value: value to be converted from a base unit
-    :param base_unit: unit of *value*. Should be one of the base units (case sensitive):
-
-            * For space: ``B``, ``kB``, ``MB``;
-            * For time: ``ms``, ``s``, ``min``.
-
-    :returns: :class:`str` value representing *base_value* converted from *base_unit* to the greatest
-        possible human-friendly unit, or ``None`` if conversion failed.
-
-    :Example:
-
-        >>> convert_int_from_base_unit(1024, 'kB')
-        '1MB'
-
-        >>> convert_int_from_base_unit(1025, 'kB')
-        '1025kB'
-
-        >>> convert_int_from_base_unit(4, '256MB')
-        '1GB'
-
-        >>> convert_int_from_base_unit(4, '256 MB') is None
-        True
-
-        >>> convert_int_from_base_unit(1024, 'KB') is None
-        True
-    """
-    base_value_mult, base_unit = strtol(base_unit, False)
-    if TYPE_CHECKING:  # pragma: no cover
-        assert isinstance(base_value_mult, int)
-    base_value *= base_value_mult
-
-    convert_tbl = get_conversion_table(base_unit)
-    for unit in convert_tbl:
-        multiplier = convert_tbl[unit][base_unit]
-        if multiplier <= 1.0 or base_value % multiplier == 0:
-            return str(round(base_value / multiplier)) + unit
-
-
-def convert_real_from_base_unit(base_value: float, base_unit: Optional[str]) -> Optional[str]:
-    """Convert an floating-point value in some base unit to a human-friendly unit.
-
-    Same as :func:`convert_int_from_base_unit`, except we have to do the math a bit differently,
-    and there's a possibility that we don't find any exact divisor.
-
-    :param base_value: value to be converted from a base unit
-    :param base_unit: unit of *value*. Should be one of the base units (case sensitive):
-
-            * For space: ``B``, ``kB``, ``MB``;
-            * For time: ``ms``, ``s``, ``min``.
-
-    :returns: :class:`str` value representing *base_value* converted from *base_unit* to the greatest
-        possible human-friendly unit, or ``None`` if conversion failed.
-
-    :Example:
-
-        >>> convert_real_from_base_unit(5, 'ms')
-        '5ms'
-
-        >>> convert_real_from_base_unit(2.5, 'ms')
-        '2500us'
-
-        >>> convert_real_from_base_unit(4.0, '256MB')
-        '1GB'
-
-        >>> convert_real_from_base_unit(4.0, '256 MB') is None
-        True
-    """
-    base_value_mult, base_unit = strtol(base_unit, False)
-    if TYPE_CHECKING:  # pragma: no cover
-        assert isinstance(base_value_mult, int)
-    base_value *= base_value_mult
-
-    result = None
-    convert_tbl = get_conversion_table(base_unit)
-    for unit in convert_tbl:
-        value = base_value / convert_tbl[unit][base_unit]
-        result = f'{value:g}{unit}'
-        if value > 0 and abs((round(value) / value) - 1.0) <= 1e-8:
-            break
-    return result
-
-
-def maybe_convert_from_base_unit(base_value: str, vartype: str, base_unit: Optional[str]) -> str:
-    """Try to convert integer or real value in a base unit to a human-readable unit.
-
-    Value is passed as a string. If parsing or subsequent conversion fails, the original
-    value is returned.
-
-    :param base_value: value to be converted from a base unit.
-    :param vartype: the target type to parse *base_value* before converting (``integer``
-        or ``real`` is expected, any other type results in return value being equal to the
-        *base_value* string).
-    :param base_unit: unit of *value*. Should be one of the base units (case sensitive):
-
-            * For space: ``B``, ``kB``, ``MB``;
-            * For time: ``ms``, ``s``, ``min``.
-
-    :returns: :class:`str` value representing *base_value* converted from *base_unit* to the greatest
-        possible human-friendly unit, or *base_value* string if conversion failed.
-
-    :Example:
-
-        >>> maybe_convert_from_base_unit('5', 'integer', 'ms')
-        '5ms'
-
-        >>> maybe_convert_from_base_unit('4.2', 'real', 'ms')
-        '4200us'
-
-        >>> maybe_convert_from_base_unit('on', 'bool', None)
-        'on'
-
-        >>> maybe_convert_from_base_unit('', 'integer', '256MB')
-        ''
-    """
-    converters: Dict[str, Tuple[Callable[[str, Optional[str]], Union[int, float, str, None]],
-                                Callable[[Any, Optional[str]], Optional[str]]]] = {
-        'integer': (parse_int, convert_int_from_base_unit),
-        'real': (parse_real, convert_real_from_base_unit),
-        'default': (lambda v, _: v, lambda v, _: v)
     }
-    parser, converter = converters.get(vartype, converters['default'])
+
-    parsed_value = parser(base_value, None)
+    round_order = {
-    if parsed_value:
+        'TB': 'GB', 'GB': 'MB', 'MB': 'kB', 'kB': 'B',
-        return converter(parsed_value, base_unit) or base_value
+        'd': 'h', 'h': 'min', 'min': 's', 's': 'ms', 'ms': 'us'
-    return base_value
+    }
+
+    if base_unit and base_unit not in convert:
+        base_value, base_unit = strtol(base_unit, False)
+    else:
+        base_value = 1
+
+    if base_value is not None and base_unit in convert and unit in convert[base_unit]:
+        value *= convert[base_unit][unit] / float(base_value)
+
+        if unit in round_order:
+            multiplier = convert[base_unit][round_order[unit]]
+            value = round(value / float(multiplier)) * multiplier
+
+        return value
 
 
 def parse_int(value: Any, base_unit: Optional[str] = None) -> Optional[int]:
@@ -552,23 +401,22 @@ def parse_real(value: Any, base_unit: Optional[str] = None) -> Optional[float]:
         return convert_to_base_unit(val, unit, base_unit)
 
 
-def compare_values(vartype: str, unit: Optional[str], settings_value: Any, config_value: Any) -> bool:
+def compare_values(vartype: str, unit: Optional[str], old_value: Any, new_value: Any) -> bool:
-    """Check if the value from ``pg_settings`` and from Patroni config are equivalent after parsing them as *vartype*.
+    """Check if *old_value* and *new_value* are equivalent after parsing them as *vartype*.
 
-    :param vartype: the target type to parse *settings_value* and *config_value* before comparing them.
+    :param vartpe: the target type to parse *old_value* and *new_value* before comparing them. Accepts any among of the
-        Accepts any among of the following (case sensitive):
+        following (case sensitive):
 
         * ``bool``: parse values using :func:`parse_bool`; or
         * ``integer``: parse values using :func:`parse_int`; or
         * ``real``: parse values using :func:`parse_real`; or
         * ``enum``: parse values as lowercase strings; or
         * ``string``: parse values as strings. This one is used by default if no valid value is passed as *vartype*.
-    :param unit: base unit to be used as argument when calling :func:`parse_int` or :func:`parse_real`
+    :param unit: base unit to be used as argument when calling :func:`parse_int` or :func:`parse_real` for *new_value*.
-        for *config_value*.
+    :param old_value: value to be compared with *new_value*.
-    :param settings_value: value to be compared with *config_value*.
+    :param new_value: value to be compared with *old_value*.
-    :param config_value: value to be compared with *settings_value*.
 
-    :returns: ``True`` if *settings_value* is equivalent to *config_value* when both are parsed as *vartype*.
+    :returns: ``True`` if *old_value* is equivalent to *new_value* when both are parsed as *vartype*.
 
     :Example:
 
@@ -608,8 +456,8 @@ def compare_values(vartype: str, unit: Optional[str], settings_value: Any, confi
     }
 
     converter = converters.get(vartype) or converters['string']
-    old_converted = converter(settings_value, None)
+    old_converted = converter(old_value, None)
-    new_converted = converter(config_value, unit)
+    new_converted = converter(new_value, unit)
 
     return old_converted is not None and new_converted is not None and old_converted == new_converted
 
@@ -911,10 +759,12 @@ def iter_response_objects(response: HTTPResponse) -> Iterator[Dict[str, Any]]:
         prev = chunk[idx:]
 
 
-def cluster_as_json(cluster: 'Cluster') -> Dict[str, Any]:
+def cluster_as_json(cluster: 'Cluster', global_config: Optional['GlobalConfig'] = None) -> Dict[str, Any]:
     """Get a JSON representation of *cluster*.
 
     :param cluster: the :class:`~patroni.dcs.Cluster` object to be parsed as JSON.
+    :param global_config: optional :class:`~patroni.config.GlobalConfig` object to check the cluster state.
+                          if not provided will be instantiated from the `Cluster.config`.
 
     :returns: JSON representation of *cluster*.
 
@@ -943,16 +793,16 @@ def cluster_as_json(cluster: 'Cluster') -> Dict[str, Any]:
             * ``from``: name of the member to be demoted;
             * ``to``: name of the member to be promoted.
     """
-    from . import global_config
+    if not global_config:
-
+        from patroni.config import get_global_config
-    config = global_config.from_cluster(cluster)
+        global_config = get_global_config(cluster)
     leader_name = cluster.leader.name if cluster.leader else None
     cluster_lsn = cluster.last_lsn or 0
 
     ret: Dict[str, Any] = {'members': []}
     for m in cluster.members:
         if m.name == leader_name:
-            role = 'standby_leader' if config.is_standby_cluster else 'leader'
+            role = 'standby_leader' if global_config.is_standby_cluster else 'leader'
         elif cluster.sync.matches(m.name):
             role = 'sync_standby'
         else:
@@ -965,7 +815,7 @@ def cluster_as_json(cluster: 'Cluster') -> Dict[str, Any]:
             member['host'] = conn_kwargs['host']
             if conn_kwargs.get('port'):
                 member['port'] = int(conn_kwargs['port'])
-        optional_attributes = ('timeline', 'pending_restart', 'pending_restart_reason', 'scheduled_restart', 'tags')
+        optional_attributes = ('timeline', 'pending_restart', 'scheduled_restart', 'tags')
         member.update({n: m.data[n] for n in optional_attributes if n in m.data})
 
         if m.name != leader_name:
@@ -982,7 +832,7 @@ def cluster_as_json(cluster: 'Cluster') -> Dict[str, Any]:
     # sort members by name for consistency
     cmp: Callable[[Dict[str, Any]], bool] = lambda m: m['name']
     ret['members'].sort(key=cmp)
-    if config.is_paused:
+    if global_config.is_paused:
         ret['pause'] = True
     if cluster.failover and cluster.failover.scheduled_at:
         ret['scheduled_switchover'] = {'at': cluster.failover.scheduled_at.isoformat()}

patroni/validator.py

@@ -16,49 +16,6 @@ from .collections import CaseInsensitiveSet
 from .dcs import dcs_modules
 from .exceptions import ConfigParseError
 from .utils import parse_int, split_host_port, data_directory_is_empty, get_major_version
-from .log import type_logformat
-
-
-def validate_log_field(field: Union[str, Dict[str, Any], Any]) -> bool:
-    """Checks if log field is valid.
-
-    :param field: A log field to be validated.
-
-    :returns: ``True`` if the field is either a string or a dictionary with exactly one key
-              that has string value, ``False`` otherwise.
-    """
-    if isinstance(field, str):
-        return True
-    elif isinstance(field, dict):
-        return len(field) == 1 and isinstance(next(iter(field.values())), str)
-    return False
-
-
-def validate_log_format(logformat: type_logformat) -> bool:
-    """Checks if log format is valid.
-
-    :param logformat: A log format to be validated.
-
-    :returns: ``True`` if the log format is either a string or a list of valid log fields.
-
-    :raises:
-        :exc:`~patroni.exceptions.ConfigParseError`:
-            * If the logformat is not a string or a list; or
-            * If the logformat is an empty list; or
-            * If the log format is a list and it with values that don't pass validation using
-              :func:`validate_log_field`.
-    """
-    if isinstance(logformat, str):
-        return True
-    elif isinstance(logformat, list):
-        if len(logformat) == 0:
-            raise ConfigParseError('should contain at least one item')
-        if not all(map(validate_log_field, logformat)):
-            raise ConfigParseError('each item should be a string or a dictionary with string values')
-
-        return True
-    else:
-        raise ConfigParseError('Should be a string or a list')
 
 
 def data_directory_empty(data_dir: str) -> bool:
@@ -980,20 +937,6 @@ validate_etcd = {
 schema = Schema({
     "name": str,
     "scope": str,
-    Optional("log"): {
-        Optional("type"): EnumValidator(('plain', 'json'), case_sensitive=True, raise_assert=True),
-        Optional("level"): EnumValidator(('DEBUG', 'INFO', 'WARN', 'WARNING', 'ERROR', 'FATAL', 'CRITICAL'),
-                                         case_sensitive=True, raise_assert=True),
-        Optional("traceback_level"): EnumValidator(('DEBUG', 'ERROR'), raise_assert=True),
-        Optional("format"): validate_log_format,
-        Optional("dateformat"): str,
-        Optional("static_fields"): dict,
-        Optional("max_queue_size"): int,
-        Optional("dir"): str,
-        Optional("file_num"): int,
-        Optional("file_size"): int,
-        Optional("loggers"): dict
-    },
     Optional("ctl"): {
         Optional("insecure"): bool,
         Optional("cacert"): str,
@@ -1107,8 +1050,7 @@ schema = Schema({
             Optional("key"): str,
             Optional("key_password"): str,
             Optional("verify"): bool,
-            Optional("set_acls"): dict,
+            Optional("set_acls"): dict
-            Optional("auth_data"): dict,
         },
         "kubernetes": {
             "labels": {},

patroni/version.py

@@ -2,4 +2,4 @@
 
 :var __version__: the current Patroni version.
 """
-__version__ = '3.2.2'
+__version__ = '3.2.1'

postgres0.yml

@@ -132,7 +132,7 @@ postgresql:
 #  safety_margin: 5
 
 tags:
-    # failover_priority: 1
+    nofailover: false
     noloadbalance: false
     clonefrom: false
     nosync: false

postgres1.yml

@@ -124,6 +124,6 @@ postgresql:
   #pre_promote: /path/to/pre_promote.sh
 
 tags:
-    # failover_priority: 1
+    nofailover: false
     noloadbalance: false
     clonefrom: false

postgres2.yml

@@ -114,7 +114,7 @@ postgresql:
 #    krb_server_keyfile: /var/spool/keytabs/postgres
     unix_socket_directories: '..'  # parent directory of data_dir
 tags:
-    # failover_priority: 1
+    nofailover: false
     noloadbalance: false
     clonefrom: false
 #    replicatefrom: postgresql1

requirements.txt

@@ -11,4 +11,3 @@ pysyncobj>=0.3.8
 cryptography>=1.4
 psutil>=2.0.0
 ydiff>=1.2.0
-python-json-logger>=2.0.2

setup.py

@@ -25,7 +25,7 @@ KEYWORDS = 'etcd governor patroni postgresql postgres ha haproxy confd' +\
 
 EXTRAS_REQUIRE = {'aws': ['boto3'], 'etcd': ['python-etcd'], 'etcd3': ['python-etcd'],
                   'consul': ['python-consul'], 'exhibitor': ['kazoo'], 'zookeeper': ['kazoo'],
-                  'kubernetes': [], 'raft': ['pysyncobj', 'cryptography'], 'jsonlogger': ['python-json-logger']}
+                  'kubernetes': [], 'raft': ['pysyncobj', 'cryptography']}
 
 # Add here all kinds of additional classifiers as defined under
 # https://pypi.python.org/pypi?%3Aaction=list_classifiers
@@ -54,8 +54,7 @@ CONSOLE_SCRIPTS = ['patroni = patroni.__main__:main',
                    'patronictl = patroni.ctl:ctl',
                    'patroni_raft_controller = patroni.raft_controller:main',
                    "patroni_wale_restore = patroni.scripts.wale_restore:main",
-                   "patroni_aws = patroni.scripts.aws:main",
+                   "patroni_aws = patroni.scripts.aws:main"]
-                   "patroni_barman_recover = patroni.scripts.barman_recover:main"]
 
 
 class _Command(Command):

tests/__init__.py

@@ -12,7 +12,6 @@ import patroni.psycopg as psycopg
 from patroni.dcs import Leader, Member
 from patroni.postgresql import Postgresql
 from patroni.postgresql.config import ConfigHandler
-from patroni.postgresql.mpp import get_mpp
 from patroni.utils import RetryFailedError, tzutc
 
 
@@ -26,41 +25,8 @@ mock_available_gucs = PropertyMock(return_value={
     'max_wal_senders', 'max_worker_processes', 'port', 'search_path', 'shared_preload_libraries',
     'stats_temp_directory', 'synchronous_standby_names', 'track_commit_timestamp', 'unix_socket_directories',
     'vacuum_cost_delay', 'vacuum_cost_limit', 'wal_keep_size', 'wal_level', 'wal_log_hints', 'zero_damaged_pages',
-    'autovacuum', 'wal_segment_size', 'wal_block_size', 'shared_buffers', 'wal_buffers',
 })
 
-GET_PG_SETTINGS_RESULT = [
-    ('wal_segment_size', '2048', '8kB', 'integer', 'internal'),
-    ('wal_block_size', '8192', None, 'integer', 'internal'),
-    ('shared_buffers', '16384', '8kB', 'integer', 'postmaster'),
-    ('wal_buffers', '-1', '8kB', 'integer', 'postmaster'),
-    ('max_connections', '100', None, 'integer', 'postmaster'),
-    ('max_prepared_transactions', '200', None, 'integer', 'postmaster'),
-    ('max_worker_processes', '8', None, 'integer', 'postmaster'),
-    ('max_locks_per_transaction', '64', None, 'integer', 'postmaster'),
-    ('max_wal_senders', '5', None, 'integer', 'postmaster'),
-    ('search_path', 'public', None, 'string', 'user'),
-    ('port', '5432', None, 'integer', 'postmaster'),
-    ('listen_addresses', '127.0.0.2, 127.0.0.3', None, 'string', 'postmaster'),
-    ('autovacuum', 'on', None, 'bool', 'sighup'),
-    ('unix_socket_directories', '/tmp', None, 'string', 'postmaster'),
-    ('shared_preload_libraries', 'citus', None, 'string', 'postmaster'),
-    ('wal_keep_size', '128', 'MB', 'integer', 'sighup'),
-    ('cluster_name', 'batman', None, 'string', 'postmaster'),
-    ('vacuum_cost_delay', '200', 'ms', 'real', 'user'),
-    ('vacuum_cost_limit', '-1', None, 'integer', 'user'),
-    ('max_stack_depth', '2048', 'kB', 'integer', 'superuser'),
-    ('constraint_exclusion', '', None, 'enum', 'user'),
-    ('force_parallel_mode', '1', None, 'enum', 'user'),
-    ('zero_damaged_pages', 'off', None, 'bool', 'superuser'),
-    ('stats_temp_directory', '/tmp', None, 'string', 'sighup'),
-    ('track_commit_timestamp', 'off', None, 'bool', 'postmaster'),
-    ('wal_log_hints', 'on', None, 'bool', 'postmaster'),
-    ('hot_standby', 'on', None, 'bool', 'postmaster'),
-    ('max_replication_slots', '5', None, 'integer', 'postmaster'),
-    ('wal_level', 'logical', None, 'enum', 'postmaster'),
-]
-
 
 class MockResponse(object):
 
@@ -151,8 +117,6 @@ class MockCursor(object):
             self.results = [(False, 2)]
         elif sql.startswith('SELECT pg_catalog.pg_postmaster_start_time'):
             self.results = [(datetime.datetime.now(tzutc),)]
-        elif sql.endswith('AND pending_restart'):
-            self.results = []
         elif sql.startswith('SELECT name, pg_catalog.current_setting(name) FROM pg_catalog.pg_settings'):
             self.results = [('data_directory', 'data'),
                             ('hba_file', os.path.join('data', 'pg_hba.conf')),
@@ -169,7 +133,22 @@ class MockCursor(object):
                             ('archive_command', 'my archive command'),
                             ('cluster_name', 'my_cluster')]
         elif sql.startswith('SELECT name, setting'):
-            self.results = GET_PG_SETTINGS_RESULT
+            self.results = [('wal_segment_size', '2048', '8kB', 'integer', 'internal'),
+                            ('wal_block_size', '8192', None, 'integer', 'internal'),
+                            ('shared_buffers', '16384', '8kB', 'integer', 'postmaster'),
+                            ('wal_buffers', '-1', '8kB', 'integer', 'postmaster'),
+                            ('max_connections', '100', None, 'integer', 'postmaster'),
+                            ('max_prepared_transactions', '0', None, 'integer', 'postmaster'),
+                            ('max_worker_processes', '8', None, 'integer', 'postmaster'),
+                            ('max_locks_per_transaction', '64', None, 'integer', 'postmaster'),
+                            ('max_wal_senders', '5', None, 'integer', 'postmaster'),
+                            ('search_path', 'public', None, 'string', 'user'),
+                            ('port', '5433', None, 'integer', 'postmaster'),
+                            ('listen_addresses', '*', None, 'string', 'postmaster'),
+                            ('autovacuum', 'on', None, 'bool', 'sighup'),
+                            ('unix_socket_directories', '/tmp', None, 'string', 'postmaster')]
+        elif sql.startswith('SELECT COUNT(*) FROM pg_catalog.pg_settings'):
+            self.results = [(1,)]
         elif sql.startswith('IDENTIFY_SYSTEM'):
             self.results = [('1', 3, '0/402EEC0', '')]
         elif sql.startswith('TIMELINE_HISTORY '):
@@ -239,11 +218,11 @@ class PostgresInit(unittest.TestCase):
     _PARAMETERS = {'wal_level': 'hot_standby', 'max_replication_slots': 5, 'f.oo': 'bar',
                    'search_path': 'public', 'hot_standby': 'on', 'max_wal_senders': 5,
                    'wal_keep_segments': 8, 'wal_log_hints': 'on', 'max_locks_per_transaction': 64,
-                   'max_worker_processes': 8, 'max_connections': 100, 'max_prepared_transactions': 200,
+                   'max_worker_processes': 8, 'max_connections': 100, 'max_prepared_transactions': 0,
                    'track_commit_timestamp': 'off', 'unix_socket_directories': '/tmp',
-                   'trigger_file': 'bla', 'stats_temp_directory': '/tmp', 'zero_damaged_pages': 'off',
+                   'trigger_file': 'bla', 'stats_temp_directory': '/tmp', 'zero_damaged_pages': '',
                    'force_parallel_mode': '1', 'constraint_exclusion': '',
-                   'max_stack_depth': 2048, 'vacuum_cost_limit': -1, 'vacuum_cost_delay': 200}
+                   'max_stack_depth': 'Z', 'vacuum_cost_limit': -1, 'vacuum_cost_delay': 200}
 
     @patch('patroni.psycopg._connect', psycopg_connect)
     @patch('patroni.postgresql.CallbackExecutor', Mock())
@@ -253,24 +232,23 @@ class PostgresInit(unittest.TestCase):
     @patch.object(Postgresql, 'get_postgres_role_from_data_directory', Mock(return_value='primary'))
     def setUp(self):
         data_dir = os.path.join('data', 'test0')
-        config = {'name': 'postgresql0', 'scope': 'batman', 'data_dir': data_dir,
+        self.p = Postgresql({'name': 'postgresql0', 'scope': 'batman', 'data_dir': data_dir,
-                  'config_dir': data_dir, 'retry_timeout': 10,
+                             'config_dir': data_dir, 'retry_timeout': 10,
-                  'krbsrvname': 'postgres', 'pgpass': os.path.join(data_dir, 'pgpass0'),
+                             'krbsrvname': 'postgres', 'pgpass': os.path.join(data_dir, 'pgpass0'),
-                  'listen': '127.0.0.2, 127.0.0.3:5432',
+                             'listen': '127.0.0.2, 127.0.0.3:5432',
-                  'connect_address': '127.0.0.2:5432', 'proxy_address': '127.0.0.2:5433',
+                             'connect_address': '127.0.0.2:5432', 'proxy_address': '127.0.0.2:5433',
-                  'authentication': {'superuser': {'username': 'foo', 'password': 'test'},
+                             'authentication': {'superuser': {'username': 'foo', 'password': 'test'},
-                                     'replication': {'username': '', 'password': 'rep-pass'},
+                                                'replication': {'username': '', 'password': 'rep-pass'},
-                                     'rewind': {'username': 'rewind', 'password': 'test'}},
+                                                'rewind': {'username': 'rewind', 'password': 'test'}},
-                  'remove_data_directory_on_rewind_failure': True,
+                             'remove_data_directory_on_rewind_failure': True,
-                  'use_pg_rewind': True, 'pg_ctl_timeout': 'bla', 'use_unix_socket': True,
+                             'use_pg_rewind': True, 'pg_ctl_timeout': 'bla', 'use_unix_socket': True,
-                  'parameters': self._PARAMETERS,
+                             'parameters': self._PARAMETERS,
-                  'recovery_conf': {'foo': 'bar'},
+                             'recovery_conf': {'foo': 'bar'},
-                  'pg_hba': ['host all all 0.0.0.0/0 md5'],
+                             'pg_hba': ['host all all 0.0.0.0/0 md5'],
-                  'pg_ident': ['krb realm postgres'],
+                             'pg_ident': ['krb realm postgres'],
-                  'callbacks': {'on_start': 'true', 'on_stop': 'true', 'on_reload': 'true',
+                             'callbacks': {'on_start': 'true', 'on_stop': 'true', 'on_reload': 'true',
-                                'on_restart': 'true', 'on_role_change': 'true'},
+                                           'on_restart': 'true', 'on_role_change': 'true'},
-                  'citus': {'group': 0, 'database': 'citus'}}
+                             'citus': {'group': 0, 'database': 'citus'}})
-        self.p = Postgresql(config, get_mpp(config))
 
 
 class BaseTestPostgresql(PostgresInit):

tests/test_api.py

@@ -8,12 +8,11 @@ from io import BytesIO as IO
 from mock import Mock, PropertyMock, patch
 from socketserver import ThreadingMixIn
 
-from patroni import global_config
 from patroni.api import RestApiHandler, RestApiServer
+from patroni.config import GlobalConfig
 from patroni.dcs import ClusterConfig, Member
 from patroni.exceptions import PostgresConnectionException
 from patroni.ha import _MemberStatus
-from patroni.postgresql.config import get_param_diff
 from patroni.psycopg import OperationalError
 from patroni.utils import RetryFailedError, tzutc
 
@@ -55,13 +54,13 @@ class MockPostgresql:
     major_version = 90600
     sysid = 'dummysysid'
     scope = 'dummy'
-    pending_restart_reason = {}
+    pending_restart = True
     wal_name = 'wal'
     lsn_name = 'lsn'
     wal_flush = '_flush'
     POSTMASTER_START_TIME = 'pg_catalog.pg_postmaster_start_time()'
     TL_LSN = 'CASE WHEN pg_catalog.pg_is_in_recovery()'
-    mpp_handler = Mock()
+    citus_handler = Mock()
 
     @staticmethod
     def postmaster_start_time():
@@ -149,9 +148,16 @@ class MockLogger(object):
     records_lost = 1
 
 
+class MockConfig(object):
+
+    def get_global_config(self, _):
+        return GlobalConfig({})
+
+
 class MockPatroni(object):
 
     ha = MockHa()
+    config = MockConfig()
     postgresql = ha.state_handler
     dcs = Mock()
     logger = MockLogger()
@@ -203,10 +209,9 @@ class TestRestApiHandler(unittest.TestCase):
     _authorization = '\nAuthorization: Basic dGVzdDp0ZXN0'
 
     def test_do_GET(self):
-        MockPostgresql.pending_restart_reason = {'max_connections': get_param_diff('200', '100')}
         MockPatroni.dcs.cluster.last_lsn = 20
         MockPatroni.dcs.cluster.sync.members = [MockPostgresql.name]
-        with patch.object(global_config.__class__, 'is_synchronous_mode', PropertyMock(return_value=True)):
+        with patch.object(GlobalConfig, 'is_synchronous_mode', PropertyMock(return_value=True)):
             MockRestApiServer(RestApiHandler, 'GET /replica')
         MockRestApiServer(RestApiHandler, 'GET /replica?lag=1M')
         MockRestApiServer(RestApiHandler, 'GET /replica?lag=10MB')
@@ -229,7 +234,7 @@ class TestRestApiHandler(unittest.TestCase):
         with patch.object(MockHa, 'is_leader', Mock(return_value=True)):
             MockRestApiServer(RestApiHandler, 'GET /replica')
             MockRestApiServer(RestApiHandler, 'GET /read-only-sync')
-            with patch.object(global_config.__class__, 'is_standby_cluster', Mock(return_value=True)):
+            with patch.object(GlobalConfig, 'is_standby_cluster', Mock(return_value=True)):
                 MockRestApiServer(RestApiHandler, 'GET /standby_leader')
         MockPatroni.dcs.cluster = None
         with patch.object(RestApiHandler, 'get_postgresql_status', Mock(return_value={'role': 'primary'})):
@@ -239,8 +244,8 @@ class TestRestApiHandler(unittest.TestCase):
         self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'GET /primary'))
         with patch.object(RestApiServer, 'query', Mock(return_value=[('', 1, '', '', '', '', False, None, None, '')])):
             self.assertIsNotNone(MockRestApiServer(RestApiHandler, 'GET /patroni'))
-        with patch.object(global_config.__class__, 'is_standby_cluster', Mock(return_value=True)), \
+        with patch.object(GlobalConfig, 'is_standby_cluster', Mock(return_value=True)), \
-                patch.object(global_config.__class__, 'is_paused', Mock(return_value=True)):
+                patch.object(GlobalConfig, 'is_paused', Mock(return_value=True)):
             MockRestApiServer(RestApiHandler, 'GET /standby_leader')
 
         # test tags
@@ -470,7 +475,7 @@ class TestRestApiHandler(unittest.TestCase):
                 request = make_request(role='primary', postgres_version='9.5.2')
                 MockRestApiServer(RestApiHandler, request)
 
-        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
+        with patch.object(GlobalConfig, 'is_paused', PropertyMock(return_value=True)):
             MockRestApiServer(RestApiHandler, make_request(schedule='2016-08-42 12:45TZ+1', role='primary'))
             # Valid timeout
             MockRestApiServer(RestApiHandler, make_request(timeout='60s'))
@@ -532,7 +537,7 @@ class TestRestApiHandler(unittest.TestCase):
 
         # Switchover in pause mode
         with patch.object(RestApiHandler, 'write_response') as response_mock, \
-             patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
+             patch.object(GlobalConfig, 'is_paused', PropertyMock(return_value=True)):
             MockRestApiServer(RestApiHandler, request)
             response_mock.assert_called_with(
                 400, 'Switchover is possible only to a specific candidate in a paused state')
@@ -541,8 +546,7 @@ class TestRestApiHandler(unittest.TestCase):
         for is_synchronous_mode, response in (
                 (True, 'switchover is not possible: can not find sync_standby'),
                 (False, 'switchover is not possible: cluster does not have members except leader')):
-            with patch.object(global_config.__class__, 'is_synchronous_mode',
+            with patch.object(GlobalConfig, 'is_synchronous_mode', PropertyMock(return_value=is_synchronous_mode)), \
-                              PropertyMock(return_value=is_synchronous_mode)), \
                  patch.object(RestApiHandler, 'write_response') as response_mock:
                 MockRestApiServer(RestApiHandler, request)
                 response_mock.assert_called_with(412, response)
@@ -567,8 +571,7 @@ class TestRestApiHandler(unittest.TestCase):
         cluster.sync.matches.return_value = False
         for is_synchronous_mode, response in (
                 (True, 'candidate name does not match with sync_standby'), (False, 'candidate does not exists')):
-            with patch.object(global_config.__class__, 'is_synchronous_mode',
+            with patch.object(GlobalConfig, 'is_synchronous_mode', PropertyMock(return_value=is_synchronous_mode)), \
-                              PropertyMock(return_value=is_synchronous_mode)), \
                  patch.object(RestApiHandler, 'write_response') as response_mock:
                 MockRestApiServer(RestApiHandler, request)
                 response_mock.assert_called_with(412, response)
@@ -629,7 +632,7 @@ class TestRestApiHandler(unittest.TestCase):
 
         # Schedule in paused mode
         with patch.object(RestApiHandler, 'write_response') as response_mock, \
-             patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
+             patch.object(GlobalConfig, 'is_paused', PropertyMock(return_value=True)):
             dcs.manual_failover.return_value = False
             MockRestApiServer(RestApiHandler, request)
             response_mock.assert_called_with(400, "Can't schedule switchover in the paused state")
@@ -675,12 +678,6 @@ class TestRestApiHandler(unittest.TestCase):
         MockRestApiServer(RestApiHandler, post + '0\n\n')
         MockRestApiServer(RestApiHandler, post + '14\n\n{"leader":"1"}')
 
-    @patch.object(MockHa, 'is_leader', Mock(return_value=True))
-    def test_do_POST_mpp(self):
-        post = 'POST /mpp HTTP/1.0' + self._authorization + '\nContent-Length: '
-        MockRestApiServer(RestApiHandler, post + '0\n\n')
-        MockRestApiServer(RestApiHandler, post + '14\n\n{"leader":"1"}')
-
 
 class TestRestApiServer(unittest.TestCase):
 

tests/test_barman_recover.py

@@ -1,366 +0,0 @@
-import logging
-import mock
-from mock import MagicMock, Mock, patch
-import unittest
-from urllib3.exceptions import MaxRetryError
-
-from patroni.scripts.barman_recover import BarmanRecover, ExitCode, RetriesExceeded, main, set_up_logging
-
-
-API_URL = "http://localhost:7480"
-BARMAN_SERVER = "my_server"
-BACKUP_ID = "backup_id"
-SSH_COMMAND = "ssh postgres@localhost"
-DATA_DIRECTORY = "/path/to/pgdata"
-LOOP_WAIT = 10
-RETRY_WAIT = 2
-MAX_RETRIES = 5
-
-
-class TestBarmanRecover(unittest.TestCase):
-
-    @patch.object(BarmanRecover, "_ensure_api_ok", Mock())
-    @patch("patroni.scripts.barman_recover.PoolManager", MagicMock())
-    def setUp(self):
-        self.br = BarmanRecover(API_URL, BARMAN_SERVER, BACKUP_ID, SSH_COMMAND, DATA_DIRECTORY, LOOP_WAIT, RETRY_WAIT,
-                                MAX_RETRIES)
-        # Reset the mock as the same instance is used across tests
-        self.br.http.request.reset_mock()
-        self.br.http.request.side_effect = None
-
-    def test__build_full_url(self):
-        self.assertEqual(self.br._build_full_url("/some/path"), f"{API_URL}/some/path")
-
-    @patch("json.loads")
-    def test__deserialize_response(self, mock_json_loads):
-        mock_response = MagicMock()
-        self.assertIsNotNone(self.br._deserialize_response(mock_response))
-        mock_json_loads.assert_called_once_with(mock_response.data.decode("utf-8"))
-
-    @patch("json.dumps")
-    def test__serialize_request(self, mock_json_dumps):
-        body = "some_body"
-        ret = self.br._serialize_request(body)
-        self.assertIsNotNone(ret)
-        mock_json_dumps.assert_called_once_with(body)
-        mock_json_dumps.return_value.encode.assert_called_once_with("utf-8")
-
-    @patch.object(BarmanRecover, "_deserialize_response", Mock(return_value="test"))
-    @patch("logging.critical")
-    def test__get_request(self, mock_logging):
-        mock_request = self.br.http.request
-
-        # with no error
-        self.assertEqual(self.br._get_request("/some/path"), "test")
-        mock_request.assert_called_once_with("GET", f"{API_URL}/some/path")
-
-        # with MaxRetryError
-        http_error = MaxRetryError(self.br.http, f"{API_URL}/some/path")
-        mock_request.side_effect = http_error
-
-        with self.assertRaises(SystemExit) as exc:
-            self.assertIsNone(self.br._get_request("/some/path"))
-
-        mock_logging.assert_called_once_with("An error occurred while performing an HTTP GET request: %r", http_error)
-        self.assertEqual(exc.exception.code, ExitCode.HTTP_REQUEST_ERROR)
-
-        # with Exception
-        mock_logging.reset_mock()
-        mock_request.side_effect = Exception("Some error.")
-
-        with patch("sys.exit") as mock_sys:
-            with self.assertRaises(Exception):
-                self.assertIsNone(self.br._get_request("/some/path"))
-
-            mock_logging.assert_not_called()
-            mock_sys.assert_not_called()
-
-    @patch.object(BarmanRecover, "_deserialize_response", Mock(return_value="test"))
-    @patch("logging.critical")
-    @patch.object(BarmanRecover, "_serialize_request")
-    def test__post_request(self, mock_serialize, mock_logging):
-        mock_request = self.br.http.request
-
-        # with no error
-        self.assertEqual(self.br._post_request("/some/path", "some body"), "test")
-        mock_serialize.assert_called_once_with("some body")
-        mock_request.assert_called_once_with("POST", f"{API_URL}/some/path", body=mock_serialize.return_value,
-                                             headers={"Content-Type": "application/json"})
-
-        # with HTTPError
-        http_error = MaxRetryError(self.br.http, f"{API_URL}/some/path")
-        mock_request.side_effect = http_error
-
-        with self.assertRaises(SystemExit) as exc:
-            self.assertIsNone(self.br._post_request("/some/path", "some body"))
-
-        mock_logging.assert_called_once_with("An error occurred while performing an HTTP POST request: %r", http_error)
-        self.assertEqual(exc.exception.code, ExitCode.HTTP_REQUEST_ERROR)
-
-        # with Exception
-        mock_logging.reset_mock()
-        mock_request.side_effect = Exception("Some error.")
-
-        with patch("sys.exit") as mock_sys:
-            with self.assertRaises(Exception):
-                self.br._post_request("/some/path", "some body")
-
-            mock_logging.assert_not_called()
-            mock_sys.assert_not_called()
-
-    @patch("logging.critical")
-    @patch.object(BarmanRecover, "_get_request")
-    def test__ensure_api_ok(self, mock_get_request, mock_logging):
-        # API ok
-        mock_get_request.return_value = "OK"
-
-        with patch("sys.exit") as mock_sys:
-            self.assertIsNone(self.br._ensure_api_ok())
-            mock_logging.assert_not_called()
-            mock_sys.assert_not_called()
-
-        # API not ok
-        mock_get_request.return_value = "random"
-
-        with self.assertRaises(SystemExit) as exc:
-            self.assertIsNone(self.br._ensure_api_ok())
-
-        mock_logging.assert_called_once_with("pg-backup-api is not working: %s", "random")
-        self.assertEqual(exc.exception.code, ExitCode.API_NOT_OK)
-
-    @patch("logging.warning")
-    @patch("time.sleep")
-    @patch.object(BarmanRecover, "_post_request")
-    def test__create_recovery_operation(self, mock_post_request, mock_sleep, mock_logging):
-        # well formed response
-        mock_post_request.return_value = {"operation_id": "some_id"}
-        self.assertEqual(self.br._create_recovery_operation(), "some_id")
-        mock_sleep.assert_not_called()
-        mock_logging.assert_not_called()
-        mock_post_request.assert_called_once_with(
-            f"servers/{BARMAN_SERVER}/operations",
-            {
-                "type": "recovery",
-                "backup_id": BACKUP_ID,
-                "remote_ssh_command": SSH_COMMAND,
-                "destination_directory": DATA_DIRECTORY,
-            }
-        )
-
-        # malformed response
-        mock_post_request.return_value = {"operation_idd": "some_id"}
-
-        with self.assertRaises(RetriesExceeded) as exc:
-            self.br._create_recovery_operation()
-
-        self.assertEqual(str(exc.exception),
-                         "Maximum number of retries exceeded for method BarmanRecover._create_recovery_operation.")
-
-        self.assertEqual(mock_sleep.call_count, self.br.max_retries)
-
-        mock_sleep.assert_has_calls([mock.call(self.br.retry_wait)] * self.br.max_retries)
-
-        self.assertEqual(mock_logging.call_count, self.br.max_retries)
-        for i in range(mock_logging.call_count):
-            call_args = mock_logging.call_args_list[i][0]
-            self.assertEqual(len(call_args), 5)
-            self.assertEqual(call_args[0], "Attempt %d of %d on method %s failed with %r.")
-            self.assertEqual(call_args[1], i + 1)
-            self.assertEqual(call_args[2], self.br.max_retries)
-            self.assertEqual(call_args[3], "BarmanRecover._create_recovery_operation")
-            self.assertIsInstance(call_args[4], KeyError)
-            self.assertEqual(call_args[4].args, ('operation_id',))
-
-    @patch("logging.warning")
-    @patch("time.sleep")
-    @patch.object(BarmanRecover, "_get_request")
-    def test__get_recovery_operation_status(self, mock_get_request, mock_sleep, mock_logging):
-        # well formed response
-        mock_get_request.return_value = {"status": "some status"}
-        self.assertEqual(self.br._get_recovery_operation_status("some_id"), "some status")
-        mock_get_request.assert_called_once_with(f"servers/{BARMAN_SERVER}/operations/some_id")
-        mock_sleep.assert_not_called()
-        mock_logging.assert_not_called()
-
-        # malformed response
-        mock_get_request.return_value = {"statuss": "some status"}
-
-        with self.assertRaises(RetriesExceeded) as exc:
-            self.br._get_recovery_operation_status("some_id")
-
-        self.assertEqual(str(exc.exception),
-                         "Maximum number of retries exceeded for method BarmanRecover._get_recovery_operation_status.")
-
-        self.assertEqual(mock_sleep.call_count, self.br.max_retries)
-        mock_sleep.assert_has_calls([mock.call(self.br.retry_wait)] * self.br.max_retries)
-
-        self.assertEqual(mock_logging.call_count, self.br.max_retries)
-        for i in range(mock_logging.call_count):
-            call_args = mock_logging.call_args_list[i][0]
-            self.assertEqual(len(call_args), 5)
-            self.assertEqual(call_args[0], "Attempt %d of %d on method %s failed with %r.")
-            self.assertEqual(call_args[1], i + 1)
-            self.assertEqual(call_args[2], self.br.max_retries)
-            self.assertEqual(call_args[3], "BarmanRecover._get_recovery_operation_status")
-            self.assertIsInstance(call_args[4], KeyError)
-            self.assertEqual(call_args[4].args, ('status',))
-
-    @patch.object(BarmanRecover, "_get_recovery_operation_status")
-    @patch("time.sleep")
-    @patch("logging.info")
-    @patch("logging.critical")
-    @patch.object(BarmanRecover, "_create_recovery_operation")
-    def test_restore_backup(self, mock_create_op, mock_log_critical, mock_log_info, mock_sleep, mock_get_status):
-        # successful fast restore
-        mock_create_op.return_value = "some_id"
-        mock_get_status.return_value = "DONE"
-
-        self.assertTrue(self.br.restore_backup())
-
-        mock_create_op.assert_called_once()
-        mock_get_status.assert_called_once_with("some_id")
-        mock_log_info.assert_called_once_with("Created the recovery operation with ID %s", "some_id")
-        mock_log_critical.assert_not_called()
-        mock_sleep.assert_not_called()
-
-        # successful slow restore
-        mock_create_op.reset_mock()
-        mock_get_status.reset_mock()
-        mock_log_info.reset_mock()
-        mock_get_status.side_effect = ["IN_PROGRESS"] * 20 + ["DONE"]
-
-        self.assertTrue(self.br.restore_backup())
-
-        mock_create_op.assert_called_once()
-
-        self.assertEqual(mock_get_status.call_count, 21)
-        mock_get_status.assert_has_calls([mock.call("some_id")] * 21)
-
-        self.assertEqual(mock_log_info.call_count, 21)
-        mock_log_info.assert_has_calls([mock.call("Created the recovery operation with ID %s", "some_id")]
-                                       + [mock.call("Recovery operation %s is still in progress", "some_id")] * 20)
-
-        mock_log_critical.assert_not_called()
-
-        self.assertEqual(mock_sleep.call_count, 20)
-        mock_sleep.assert_has_calls([mock.call(LOOP_WAIT)] * 20)
-
-        # failed fast restore
-        mock_create_op.reset_mock()
-        mock_get_status.reset_mock()
-        mock_log_info.reset_mock()
-        mock_sleep.reset_mock()
-        mock_get_status.side_effect = None
-        mock_get_status.return_value = "FAILED"
-
-        self.assertFalse(self.br.restore_backup())
-
-        mock_create_op.assert_called_once()
-        mock_get_status.assert_called_once_with("some_id")
-        mock_log_info.assert_called_once_with("Created the recovery operation with ID %s", "some_id")
-        mock_log_critical.assert_not_called()
-        mock_sleep.assert_not_called()
-
-        # failed slow restore
-        mock_create_op.reset_mock()
-        mock_get_status.reset_mock()
-        mock_log_info.reset_mock()
-        mock_sleep.reset_mock()
-        mock_get_status.side_effect = ["IN_PROGRESS"] * 20 + ["FAILED"]
-
-        self.assertFalse(self.br.restore_backup())
-
-        mock_create_op.assert_called_once()
-
-        self.assertEqual(mock_get_status.call_count, 21)
-        mock_get_status.assert_has_calls([mock.call("some_id")] * 21)
-
-        self.assertEqual(mock_log_info.call_count, 21)
-        mock_log_info.assert_has_calls([mock.call("Created the recovery operation with ID %s", "some_id")]
-                                       + [mock.call("Recovery operation %s is still in progress", "some_id")] * 20)
-
-        mock_log_critical.assert_not_called()
-
-        self.assertEqual(mock_sleep.call_count, 20)
-        mock_sleep.assert_has_calls([mock.call(LOOP_WAIT)] * 20)
-
-        # create retries exceeded
-        mock_log_info.reset_mock()
-        mock_sleep.reset_mock()
-        mock_create_op.side_effect = RetriesExceeded
-        mock_get_status.side_effect = None
-
-        with self.assertRaises(SystemExit) as exc:
-            self.assertIsNone(self.br.restore_backup())
-
-        self.assertEqual(exc.exception.code, ExitCode.HTTP_RESPONSE_MALFORMED)
-        mock_log_info.assert_not_called()
-        mock_log_critical.assert_called_once_with("Maximum number of retries exceeded, exiting.")
-        mock_sleep.assert_not_called()
-
-        # get status retries exceeded
-        mock_create_op.reset_mock()
-        mock_create_op.side_effect = None
-        mock_log_critical.reset_mock()
-        mock_log_info.reset_mock()
-        mock_get_status.side_effect = RetriesExceeded
-
-        with self.assertRaises(SystemExit) as exc:
-            self.assertIsNone(self.br.restore_backup())
-
-        self.assertEqual(exc.exception.code, ExitCode.HTTP_RESPONSE_MALFORMED)
-        mock_log_info.assert_called_once_with("Created the recovery operation with ID %s", "some_id")
-        mock_log_critical.assert_called_once_with("Maximum number of retries exceeded, exiting.")
-        mock_sleep.assert_not_called()
-
-
-class TestMain(unittest.TestCase):
-
-    @patch("logging.basicConfig")
-    def test_set_up_logging(self, mock_log_config):
-        log_file = "/path/to/some/file.log"
-        set_up_logging(log_file)
-        mock_log_config.assert_called_once_with(filename=log_file, level=logging.INFO,
-                                                format="%(asctime)s %(levelname)s: %(message)s")
-
-    @patch("logging.critical")
-    @patch("logging.info")
-    @patch("patroni.scripts.barman_recover.set_up_logging")
-    @patch("patroni.scripts.barman_recover.BarmanRecover")
-    @patch("patroni.scripts.barman_recover.ArgumentParser")
-    def test_main(self, mock_arg_parse, mock_br, mock_set_up_log, mock_log_info, mock_log_critical):
-        # successful restore
-        args = MagicMock()
-        mock_arg_parse.return_value.parse_known_args.return_value = (args, None)
-        mock_br.return_value.restore_backup.return_value = True
-
-        with self.assertRaises(SystemExit) as exc:
-            main()
-
-        mock_arg_parse.assert_called_once()
-        mock_set_up_log.assert_called_once_with(args.log_file)
-        mock_br.assert_called_once_with(args.api_url, args.barman_server, args.backup_id, args.ssh_command,
-                                        args.data_directory, args.loop_wait, args.retry_wait, args.max_retries,
-                                        args.cert_file, args.key_file)
-        mock_log_info.assert_called_once_with("Recovery operation finished successfully.")
-        mock_log_critical.assert_not_called()
-        self.assertEqual(exc.exception.code, ExitCode.RECOVERY_DONE)
-
-        # failed restore
-        mock_arg_parse.reset_mock()
-        mock_set_up_log.reset_mock()
-        mock_br.reset_mock()
-        mock_log_info.reset_mock()
-        mock_br.return_value.restore_backup.return_value = False
-
-        with self.assertRaises(SystemExit) as exc:
-            main()
-
-        mock_arg_parse.assert_called_once()
-        mock_set_up_log.assert_called_once_with(args.log_file)
-        mock_br.assert_called_once_with(args.api_url, args.barman_server, args.backup_id, args.ssh_command,
-                                        args.data_directory, args.loop_wait, args.retry_wait, args.max_retries,
-                                        args.cert_file, args.key_file)
-        mock_log_info.assert_not_called()
-        mock_log_critical.assert_called_once_with("Recovery operation failed.")
-        self.assertEqual(exc.exception.code, ExitCode.RECOVERY_FAILED)

tests/test_bootstrap.py

@@ -4,11 +4,10 @@ import sys
 from mock import Mock, PropertyMock, patch
 
 from patroni.async_executor import CriticalTask
-from patroni.collections import CaseInsensitiveDict
 from patroni.postgresql import Postgresql
 from patroni.postgresql.bootstrap import Bootstrap
 from patroni.postgresql.cancellable import CancellableSubprocess
-from patroni.postgresql.config import ConfigHandler, get_param_diff
+from patroni.postgresql.config import ConfigHandler
 
 from . import psycopg_connect, BaseTestPostgresql, mock_available_gucs
 
@@ -143,16 +142,6 @@ class TestBootstrap(BaseTestPostgresql):
                     (), error_handler
                 ),
                 ["--key=value with spaces"])
-            # not allowed options in list of dicts/strs are filtered out
-            self.assertEqual(
-                self.b.process_user_options(
-                    'pg_basebackup',
-                    [{'checkpoint': 'fast'}, {'dbname': 'dbname=postgres'}, 'gzip', {'label': 'standby'}, 'verbose'],
-                    ('dbname', 'verbose'),
-                    print
-                ),
-                ['--checkpoint=fast', '--gzip', '--label=standby'],
-            )
 
     @patch.object(CancellableSubprocess, 'call', Mock())
     @patch.object(Postgresql, 'is_running', Mock(return_value=True))
@@ -246,9 +235,8 @@ class TestBootstrap(BaseTestPostgresql):
         self.assertTrue(task.result)
 
         self.b.bootstrap(config)
-        with patch.object(Postgresql, 'pending_restart_reason',
+        with patch.object(Postgresql, 'pending_restart', PropertyMock(return_value=True)), \
-                          PropertyMock(CaseInsensitiveDict({'max_connections': get_param_diff('200', '100')}))), \
+                patch.object(Postgresql, 'restart', Mock()) as mock_restart:
-             patch.object(Postgresql, 'restart', Mock()) as mock_restart:
             self.b.post_bootstrap({}, task)
             mock_restart.assert_called_once()
 

tests/test_citus.py

@@ -1,26 +1,25 @@
 import time
-from mock import Mock, patch, PropertyMock
+from mock import Mock, patch
-from patroni.postgresql.mpp.citus import CitusHandler
+from patroni.postgresql.citus import CitusHandler
-from patroni.psycopg import ProgrammingError
 
 from . import BaseTestPostgresql, MockCursor, psycopg_connect, SleepException
 from .test_ha import get_cluster_initialized_with_leader
 
 
-@patch('patroni.postgresql.mpp.citus.Thread', Mock())
+@patch('patroni.postgresql.citus.Thread', Mock())
 @patch('patroni.psycopg.connect', psycopg_connect)
 class TestCitus(BaseTestPostgresql):
 
     def setUp(self):
         super(TestCitus, self).setUp()
-        self.c = self.p.mpp_handler
+        self.c = self.p.citus_handler
         self.cluster = get_cluster_initialized_with_leader()
         self.cluster.workers[1] = self.cluster
 
     @patch('time.time', Mock(side_effect=[100, 130, 160, 190, 220, 250, 280, 310, 340, 370]))
-    @patch('patroni.postgresql.mpp.citus.logger.exception', Mock(side_effect=SleepException))
+    @patch('patroni.postgresql.citus.logger.exception', Mock(side_effect=SleepException))
-    @patch('patroni.postgresql.mpp.citus.logger.warning')
+    @patch('patroni.postgresql.citus.logger.warning')
-    @patch('patroni.postgresql.mpp.citus.PgDistNode.wait', Mock())
+    @patch('patroni.postgresql.citus.PgDistNode.wait', Mock())
     @patch.object(CitusHandler, 'is_alive', Mock(return_value=True))
     def test_run(self, mock_logger_warning):
         # `before_demote` or `before_promote` REST API calls starting a
@@ -40,10 +39,10 @@ class TestCitus(BaseTestPostgresql):
 
     @patch.object(CitusHandler, 'is_alive', Mock(return_value=False))
     @patch.object(CitusHandler, 'start', Mock())
-    def test_sync_meta_data(self):
+    def test_sync_pg_dist_node(self):
         with patch.object(CitusHandler, 'is_enabled', Mock(return_value=False)):
-            self.c.sync_meta_data(self.cluster)
+            self.c.sync_pg_dist_node(self.cluster)
-        self.c.sync_meta_data(self.cluster)
+        self.c.sync_pg_dist_node(self.cluster)
 
     def test_handle_event(self):
         self.c.handle_event(self.cluster, {})
@@ -52,22 +51,22 @@ class TestCitus(BaseTestPostgresql):
                                                'leader': 'leader', 'timeout': 30, 'cooldown': 10})
 
     def test_add_task(self):
-        with patch('patroni.postgresql.mpp.citus.logger.error') as mock_logger, \
+        with patch('patroni.postgresql.citus.logger.error') as mock_logger, \
-                patch('patroni.postgresql.mpp.citus.urlparse', Mock(side_effect=Exception)):
+                patch('patroni.postgresql.citus.urlparse', Mock(side_effect=Exception)):
             self.c.add_task('', 1, None)
             mock_logger.assert_called_once()
 
-        with patch('patroni.postgresql.mpp.citus.logger.debug') as mock_logger:
+        with patch('patroni.postgresql.citus.logger.debug') as mock_logger:
             self.c.add_task('before_demote', 1, 'postgres://host:5432/postgres', 30)
             mock_logger.assert_called_once()
             self.assertTrue(mock_logger.call_args[0][0].startswith('Adding the new task:'))
 
-        with patch('patroni.postgresql.mpp.citus.logger.debug') as mock_logger:
+        with patch('patroni.postgresql.citus.logger.debug') as mock_logger:
             self.c.add_task('before_promote', 1, 'postgres://host:5432/postgres', 30)
             mock_logger.assert_called_once()
             self.assertTrue(mock_logger.call_args[0][0].startswith('Overriding existing task:'))
 
-        # add_task called from sync_meta_data should not override already scheduled or in flight task until deadline
+        # add_task called from sync_pg_dist_node should not override already scheduled or in flight task until deadline
         self.assertIsNotNone(self.c.add_task('after_promote', 1, 'postgres://host:5432/postgres', 30))
         self.assertIsNone(self.c.add_task('after_promote', 1, 'postgres://host:5432/postgres'))
         self.c._in_flight = self.c._tasks.pop()
@@ -107,7 +106,7 @@ class TestCitus(BaseTestPostgresql):
         self.c.process_tasks()
 
         self.c.add_task('after_promote', 0, 'postgres://host3:5432/postgres')
-        with patch('patroni.postgresql.mpp.citus.logger.error') as mock_logger, \
+        with patch('patroni.postgresql.citus.logger.error') as mock_logger, \
                 patch.object(CitusHandler, 'query', Mock(side_effect=Exception)):
             self.c.process_tasks()
             mock_logger.assert_called_once()
@@ -116,7 +115,7 @@ class TestCitus(BaseTestPostgresql):
     def test_on_demote(self):
         self.c.on_demote()
 
-    @patch('patroni.postgresql.mpp.citus.logger.error')
+    @patch('patroni.postgresql.citus.logger.error')
     @patch.object(MockCursor, 'execute', Mock(side_effect=Exception))
     def test_load_pg_dist_node(self, mock_logger):
         # load_pg_dist_node() triggers, query fails and exception is property handled
@@ -141,6 +140,10 @@ class TestCitus(BaseTestPostgresql):
         self.assertEqual(parameters['wal_level'], 'logical')
         self.assertEqual(parameters['citus.local_hostname'], '/tmp')
 
+    def test_bootstrap(self):
+        self.c._config = None
+        self.c.bootstrap()
+
     def test_ignore_replication_slot(self):
         self.assertFalse(self.c.ignore_replication_slot({'name': 'foo', 'type': 'physical',
                                                          'database': 'bar', 'plugin': 'wal2json'}))
@@ -158,16 +161,3 @@ class TestCitus(BaseTestPostgresql):
                                                          'type': 'logical', 'database': 'citus', 'plugin': 'pgoutput'}))
         self.assertTrue(self.c.ignore_replication_slot({'name': 'citus_shard_split_slot_1_2_3',
                                                         'type': 'logical', 'database': 'citus', 'plugin': 'citus'}))
-
-    @patch('patroni.postgresql.mpp.citus.logger.debug')
-    @patch('patroni.postgresql.mpp.citus.connect', psycopg_connect)
-    @patch('patroni.postgresql.mpp.citus.quote_ident', Mock())
-    def test_bootstrap_duplicate_database(self, mock_logger):
-        with patch.object(MockCursor, 'execute', Mock(side_effect=ProgrammingError)):
-            self.assertRaises(ProgrammingError, self.c.bootstrap)
-        with patch.object(MockCursor, 'execute', Mock(side_effect=[ProgrammingError, None, None, None])), \
-                patch.object(ProgrammingError, 'diag') as mock_diag:
-            type(mock_diag).sqlstate = PropertyMock(return_value='42P04')
-            self.c.bootstrap()
-        mock_logger.assert_called_once()
-        self.assertTrue(mock_logger.call_args[0][0].startswith('Exception when creating database'))

tests/test_config.py

@@ -5,11 +5,7 @@ import io
 
 from copy import deepcopy
 from mock import MagicMock, Mock, patch
-
+from patroni.config import Config, ConfigParseError, GlobalConfig
-from patroni import global_config
-from patroni.config import ClusterConfig, Config, ConfigParseError
-
-from .test_ha import get_cluster_initialized_with_only_leader
 
 
 class TestConfig(unittest.TestCase):
@@ -35,7 +31,6 @@ class TestConfig(unittest.TestCase):
             'PATRONI_NAMESPACE': '/patroni/',
             'PATRONI_SCOPE': 'batman2',
             'PATRONI_LOGLEVEL': 'ERROR',
-            'PATRONI_LOG_FORMAT': '["message", {"levelname": "level"}]',
             'PATRONI_LOG_LOGGERS': 'patroni.postmaster: WARNING, urllib3: DEBUG',
             'PATRONI_LOG_FILE_NUM': '5',
             'PATRONI_CITUS_DATABASE': 'citus',
@@ -160,40 +155,48 @@ class TestConfig(unittest.TestCase):
     @patch('patroni.config.logger')
     def test__validate_failover_tags(self, mock_logger, mock_get):
         """Ensures that only one of `nofailover` or `failover_priority` can be provided"""
+        mock_logger.warning.reset_mock()
         config = Config("postgres0.yml")
-
         # Providing one of `nofailover` or `failover_priority` is fine
-        for single_param in ({"nofailover": True}, {"failover_priority": 1}, {"failover_priority": 0}):
+        just_nofailover = {"nofailover": True}
-            mock_get.side_effect = [single_param] * 2
+        mock_get.side_effect = [just_nofailover] * 2
-            self.assertIsNone(config._validate_failover_tags())
+        self.assertIsNone(config._validate_failover_tags())
-            mock_logger.warning.assert_not_called()
+        mock_logger.warning.assert_not_called()
-
+        just_failover_priority = {"failover_priority": 1}
+        mock_get.side_effect = [just_failover_priority] * 2
+        self.assertIsNone(config._validate_failover_tags())
+        mock_logger.warning.assert_not_called()
         # Providing both `nofailover` and `failover_priority` is fine if consistent
-        for consistent_state in (
+        consistent_false = {"nofailover": False, "failover_priority": 1}
-            {"nofailover": False, "failover_priority": 1},
+        mock_get.side_effect = [consistent_false] * 2
-            {"nofailover": True, "failover_priority": 0},
+        self.assertIsNone(config._validate_failover_tags())
-            {"nofailover": "False", "failover_priority": 0}
+        mock_logger.warning.assert_not_called()
-        ):
+        consistent_true = {"nofailover": True, "failover_priority": 0}
-            mock_get.side_effect = [consistent_state] * 2
+        mock_get.side_effect = [consistent_true] * 2
-            self.assertIsNone(config._validate_failover_tags())
+        self.assertIsNone(config._validate_failover_tags())
-            mock_logger.warning.assert_not_called()
+        mock_logger.warning.assert_not_called()
-
         # Providing both inconsistently should log a warning
-        for inconsistent_state in (
+        inconsistent_false = {"nofailover": False, "failover_priority": 0}
-            {"nofailover": False, "failover_priority": 0},
+        mock_get.side_effect = [inconsistent_false] * 2
-            {"nofailover": True, "failover_priority": 1},
+        self.assertIsNone(config._validate_failover_tags())
-            {"nofailover": "False", "failover_priority": 1},
+        mock_logger.warning.assert_called_once_with(
-            {"nofailover": "", "failover_priority": 0}
+            'Conflicting configuration between nofailover: %s and failover_priority: %s.'
-        ):
+            + ' Defaulting to nofailover: %s',
-            mock_get.side_effect = [inconsistent_state] * 2
+            False,
-            self.assertIsNone(config._validate_failover_tags())
+            0,
-            mock_logger.warning.assert_called_once_with(
+            False
-                'Conflicting configuration between nofailover: %s and failover_priority: %s.'
+        )
-                + ' Defaulting to nofailover: %s',
+        mock_logger.warning.reset_mock()
-                inconsistent_state['nofailover'],
+        inconsistent_true = {"nofailover": True, "failover_priority": 1}
-                inconsistent_state['failover_priority'],
+        mock_get.side_effect = [inconsistent_true] * 2
-                inconsistent_state['nofailover'])
+        self.assertIsNone(config._validate_failover_tags())
-            mock_logger.warning.reset_mock()
+        mock_logger.warning.assert_called_once_with(
+            'Conflicting configuration between nofailover: %s and failover_priority: %s.'
+            + ' Defaulting to nofailover: %s',
+            True,
+            1,
+            True
+        )
 
     def test__process_postgresql_parameters(self):
         expected_params = {
@@ -245,6 +248,4 @@ class TestConfig(unittest.TestCase):
     def test_global_config_is_synchronous_mode(self):
         # we should ignore synchronous_mode setting in a standby cluster
         config = {'standby_cluster': {'host': 'some_host'}, 'synchronous_mode': True}
-        cluster = get_cluster_initialized_with_only_leader(cluster_config=ClusterConfig(1, config, 1))
+        self.assertFalse(GlobalConfig(config).is_synchronous_mode)
-        test_config = global_config.from_cluster(cluster)
-        self.assertFalse(test_config.is_synchronous_mode)

tests/test_config_generator.py

@@ -62,10 +62,9 @@ class TestGenerateConfig(unittest.TestCase):
             'scope': self.environ['PATRONI_SCOPE'],
             'name': HOSTNAME,
             'log': {
-                'type': PatroniLogger.DEFAULT_TYPE,
-                'format': PatroniLogger.DEFAULT_FORMAT,
                 'level': PatroniLogger.DEFAULT_LEVEL,
                 'traceback_level': PatroniLogger.DEFAULT_TRACEBACK_LEVEL,
+                'format': PatroniLogger.DEFAULT_FORMAT,
                 'max_queue_size': PatroniLogger.DEFAULT_MAX_QUEUE_SIZE
             },
             'restapi': {

tests/test_consul.py

@@ -3,10 +3,8 @@ import unittest
 
 from consul import ConsulException, NotFound
 from mock import Mock, PropertyMock, patch
-from patroni.dcs import get_dcs
 from patroni.dcs.consul import AbstractDCS, Cluster, Consul, ConsulInternalError, \
     ConsulError, ConsulClient, HTTPClient, InvalidSessionTTL, InvalidSession, RetryFailedError
-from patroni.postgresql.mpp import get_mpp
 from . import SleepException
 
 
@@ -93,17 +91,13 @@ class TestConsul(unittest.TestCase):
     @patch.object(consul.Consul.KV, 'get', kv_get)
     @patch.object(consul.Consul.KV, 'delete', Mock())
     def setUp(self):
-        self.assertIsInstance(get_dcs({'ttl': 30, 'scope': 't', 'name': 'p', 'retry_timeout': 10,
+        Consul({'ttl': 30, 'scope': 't', 'name': 'p', 'url': 'https://l:1', 'retry_timeout': 10,
-                                       'consul': {'url': 'https://l:1', 'verify': 'on',
+                'verify': 'on', 'key': 'foo', 'cert': 'bar', 'cacert': 'buz', 'token': 'asd', 'dc': 'dc1',
-                                                  'key': 'foo', 'cert': 'bar', 'cacert': 'buz',
+                'register_service': True})
-                                                  'token': 'asd', 'dc': 'dc1', 'register_service': True}}), Consul)
+        Consul({'ttl': 30, 'scope': 't_', 'name': 'p', 'url': 'https://l:1', 'retry_timeout': 10,
-        self.assertIsInstance(get_dcs({'ttl': 30, 'scope': 't_', 'name': 'p', 'retry_timeout': 10,
+                'verify': 'on', 'cert': 'bar', 'cacert': 'buz', 'register_service': True})
-                                       'consul': {'url': 'https://l:1', 'verify': 'on',
+        self.c = Consul({'ttl': 30, 'scope': 'test', 'name': 'postgresql1', 'host': 'localhost:1', 'retry_timeout': 10,
-                                                  'cert': 'bar', 'cacert': 'buz', 'register_service': True}}), Consul)
+                         'register_service': True, 'service_check_tls_server_name': True})
-        self.c = get_dcs({'ttl': 30, 'scope': 'test', 'name': 'postgresql1', 'retry_timeout': 10,
-                          'consul': {'host': 'localhost:1', 'register_service': True,
-                                     'service_check_tls_server_name': True}})
-        self.assertIsInstance(self.c, Consul)
         self.c._base_path = 'service/good'
         self.c.get_cluster()
 
@@ -136,7 +130,7 @@ class TestConsul(unittest.TestCase):
         self.assertIsInstance(self.c.get_cluster(), Cluster)
 
     def test__get_citus_cluster(self):
-        self.c._mpp = get_mpp({'citus': {'group': 0, 'database': 'postgres'}})
+        self.c._citus_group = '0'
         cluster = self.c.get_cluster()
         self.assertIsInstance(cluster, Cluster)
         self.assertIsInstance(cluster.workers[1], Cluster)

tests/test_ctl.py

@@ -1,4 +1,3 @@
-import click
 import etcd
 import mock
 import os
@@ -7,13 +6,10 @@ import unittest
 from click.testing import CliRunner
 from datetime import datetime, timedelta
 from mock import patch, Mock, PropertyMock
-from patroni import global_config
 from patroni.ctl import ctl, load_config, output_members, get_dcs, parse_dcs, \
     get_all_members, get_any_member, get_cursor, query_member, PatroniCtlException, apply_config_changes, \
     format_config_for_editing, show_diff, invoke_editor, format_pg_version, CONFIG_FILE_PATH, PatronictlPrettyTable
-from patroni.dcs import Cluster, Failover
+from patroni.dcs.etcd import AbstractEtcdClientWithFailover, Cluster, Failover
-from patroni.postgresql.config import get_param_diff
-from patroni.postgresql.mpp import get_mpp
 from patroni.psycopg import OperationalError
 from patroni.utils import tzutc
 from prettytable import PrettyTable, ALL
@@ -25,26 +21,26 @@ from .test_ha import get_cluster_initialized_without_leader, get_cluster_initial
     get_cluster_initialized_with_only_leader, get_cluster_not_initialized_without_leader, get_cluster, Member
 
 
-def get_default_config(*args):
+DEFAULT_CONFIG = {
-    return {
+    'scope': 'alpha',
-        'scope': 'alpha',
+    'restapi': {'listen': '::', 'certfile': 'a'},
-        'restapi': {'listen': '::', 'certfile': 'a'},
+    'ctl': {'certfile': 'a'},
-        'ctl': {'certfile': 'a'},
+    'etcd': {'host': 'localhost:2379'},
-        'etcd': {'host': 'localhost:2379', 'retry_timeout': 10, 'ttl': 30},
+    'citus': {'database': 'citus', 'group': 0},
-        'citus': {'database': 'citus', 'group': 0},
+    'postgresql': {'data_dir': '.', 'pgpass': './pgpass', 'parameters': {}, 'retry_timeout': 5}
-        'postgresql': {'data_dir': '.', 'pgpass': './pgpass', 'parameters': {}, 'retry_timeout': 5}
+}
-    }
 
 
-@patch.object(PoolManager, 'request', Mock(return_value=MockResponse()))
+@patch('patroni.ctl.load_config', Mock(return_value=DEFAULT_CONFIG))
-@patch('patroni.ctl.load_config', get_default_config)
-@patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_with_leader()))
 class TestCtl(unittest.TestCase):
     TEST_ROLES = ('master', 'primary', 'leader')
 
     @patch('socket.getaddrinfo', socket_getaddrinfo)
+    @patch.object(AbstractEtcdClientWithFailover, '_get_machines_list', Mock(return_value=['http://remotehost:2379']))
     def setUp(self):
         self.runner = CliRunner()
+        self.e = get_dcs({'etcd': {'ttl': 30, 'host': 'ok:2379', 'retry_timeout': 10},
+                          'citus': {'group': 0}}, 'foo', None)
 
     @patch('patroni.ctl.logging.debug')
     def test_load_config(self, mock_logger_debug):
@@ -70,31 +66,29 @@ class TestCtl(unittest.TestCase):
 
     @patch('patroni.psycopg.connect', psycopg_connect)
     def test_get_cursor(self):
-        with click.Context(click.Command('query')) as ctx:
+        for role in self.TEST_ROLES:
-            ctx.obj = {'__config': {}, '__mpp': get_mpp({})}
+            self.assertIsNone(get_cursor({}, get_cluster_initialized_without_leader(), None, {}, role=role))
-            for role in self.TEST_ROLES:
+            self.assertIsNotNone(get_cursor({}, get_cluster_initialized_with_leader(), None, {}, role=role))
-                self.assertIsNone(get_cursor(get_cluster_initialized_without_leader(), None, {}, role=role))
-                self.assertIsNotNone(get_cursor(get_cluster_initialized_with_leader(), None, {}, role=role))
 
-            # MockCursor returns pg_is_in_recovery as false
+        # MockCursor returns pg_is_in_recovery as false
-            self.assertIsNone(get_cursor(get_cluster_initialized_with_leader(), None, {}, role='replica'))
+        self.assertIsNone(get_cursor({}, get_cluster_initialized_with_leader(), None, {}, role='replica'))
 
-            self.assertIsNotNone(get_cursor(get_cluster_initialized_with_leader(), None, {'dbname': 'foo'}, role='any'))
+        self.assertIsNotNone(get_cursor({}, get_cluster_initialized_with_leader(), None, {'dbname': 'foo'}, role='any'))
 
-            # Mutually exclusive options
+        # Mutually exclusive options
-            with self.assertRaises(PatroniCtlException) as e:
+        with self.assertRaises(PatroniCtlException) as e:
-                get_cursor(get_cluster_initialized_with_leader(), None, {'dbname': 'foo'}, member_name='other',
+            get_cursor({}, get_cluster_initialized_with_leader(), None, {'dbname': 'foo'}, member_name='other',
-                           role='replica')
+                       role='replica')
 
-            self.assertEqual(str(e.exception), '--role and --member are mutually exclusive options')
+        self.assertEqual(str(e.exception), '--role and --member are mutually exclusive options')
 
-            # Invalid member provided
+        # Invalid member provided
-            self.assertIsNone(get_cursor(get_cluster_initialized_with_leader(), None, {'dbname': 'foo'},
+        self.assertIsNone(get_cursor({}, get_cluster_initialized_with_leader(), None, {'dbname': 'foo'},
-                                         member_name='invalid'))
+                                     member_name='invalid'))
 
-            # Valid member provided
+        # Valid member provided
-            self.assertIsNotNone(get_cursor(get_cluster_initialized_with_leader(), None, {'dbname': 'foo'},
+        self.assertIsNotNone(get_cursor({}, get_cluster_initialized_with_leader(), None, {'dbname': 'foo'},
-                                            member_name='other'))
+                                        member_name='other'))
 
     def test_parse_dcs(self):
         assert parse_dcs(None) is None
@@ -108,20 +102,23 @@ class TestCtl(unittest.TestCase):
         self.assertRaises(PatroniCtlException, parse_dcs, 'invalid://test')
 
     def test_output_members(self):
-        with click.Context(click.Command('list')) as ctx:
+        scheduled_at = datetime.now(tzutc) + timedelta(seconds=600)
-            ctx.obj = {'__config': {}, '__mpp': get_mpp({})}
+        cluster = get_cluster_initialized_with_leader(Failover(1, 'foo', 'bar', scheduled_at))
-            scheduled_at = datetime.now(tzutc) + timedelta(seconds=600)
+        del cluster.members[1].data['conn_url']
-            cluster = get_cluster_initialized_with_leader(Failover(1, 'foo', 'bar', scheduled_at))
+        for fmt in ('pretty', 'json', 'yaml', 'topology'):
-            del cluster.members[1].data['conn_url']
+            self.assertIsNone(output_members({}, cluster, name='abc', fmt=fmt))
-            for fmt in ('pretty', 'json', 'yaml', 'topology'):
-                self.assertIsNone(output_members(cluster, name='abc', fmt=fmt))
 
-            with patch('click.echo') as mock_echo:
+        with patch('click.echo') as mock_echo:
-                self.assertIsNone(output_members(cluster, name='abc', fmt='tsv'))
+            self.assertIsNone(output_members({}, cluster, name='abc', fmt='tsv'))
-                self.assertEqual(mock_echo.call_args[0][0], 'abc\tother\t\tReplica\trunning\t\tunknown')
+            self.assertEqual(mock_echo.call_args[0][0], 'abc\tother\t\tReplica\trunning\t\tunknown')
+
+    @patch('patroni.ctl.get_dcs')
+    @patch.object(PoolManager, 'request', Mock(return_value=MockResponse()))
+    def test_switchover(self, mock_get_dcs):
+        mock_get_dcs.return_value = self.e
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
+        mock_get_dcs.return_value.set_failover_value = Mock()
 
-    @patch('patroni.dcs.AbstractDCS.set_failover_value', Mock())
-    def test_switchover(self):
         # Confirm
         result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
         self.assertEqual(result.exit_code, 0)
@@ -150,7 +147,7 @@ class TestCtl(unittest.TestCase):
         self.assertEqual(result.exit_code, 0)
 
         # Scheduled in pause mode
-        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
+        with patch('patroni.config.GlobalConfig.is_paused', PropertyMock(return_value=True)):
             result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0',
                                               '--force', '--scheduled', '2015-01-01T12:00:00'])
             self.assertEqual(result.exit_code, 1)
@@ -159,8 +156,7 @@ class TestCtl(unittest.TestCase):
         # Target and source are equal
         result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nleader\n\ny')
         self.assertEqual(result.exit_code, 1)
-        self.assertIn("Candidate ['other']", result.output)
+        self.assertIn('Switchover target and source are the same', result.output)
-        self.assertIn('Member leader is already the leader of cluster dummy', result.output)
 
         # Candidate is not a member of the cluster
         result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nReality\n\ny')
@@ -184,12 +180,12 @@ class TestCtl(unittest.TestCase):
         self.assertIn('Member dummy is not the leader of cluster dummy', result.output)
 
         # Errors while sending Patroni REST API request
-        with patch('patroni.ctl.request_patroni', Mock(side_effect=Exception)):
+        with patch.object(PoolManager, 'request', Mock(side_effect=Exception)):
             result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'],
                                         input='leader\nother\n2300-01-01T12:23:00\ny')
             self.assertIn('falling back to DCS', result.output)
 
-        with patch('patroni.ctl.request_patroni') as mock_api_request:
+        with patch.object(PoolManager, 'request') as mock_api_request:
             mock_api_request.return_value.status = 500
             result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
             self.assertIn('Switchover failed', result.output)
@@ -200,65 +196,64 @@ class TestCtl(unittest.TestCase):
             self.assertIn('Switchover failed', result.output)
 
         # No members available
-        with patch('patroni.dcs.AbstractDCS.get_cluster',
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_only_leader
-                   Mock(return_value=get_cluster_initialized_with_only_leader())):
+        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
-            result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
+        self.assertEqual(result.exit_code, 1)
-            self.assertEqual(result.exit_code, 1)
+        self.assertIn('No candidates found to switchover to', result.output)
-            self.assertIn('No candidates found to switchover to', result.output)
 
         # No leader available
-        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_without_leader())):
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_without_leader
-            result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
+        result = self.runner.invoke(ctl, ['switchover', 'dummy', '--group', '0'], input='leader\nother\n\ny')
-            self.assertEqual(result.exit_code, 1)
+        self.assertEqual(result.exit_code, 1)
-            self.assertIn('This cluster has no leader', result.output)
+        self.assertIn('This cluster has no leader', result.output)
 
         # Citus cluster, no group number specified
         result = self.runner.invoke(ctl, ['switchover', 'dummy', '--force'], input='\n')
         self.assertEqual(result.exit_code, 1)
         self.assertIn('For Citus clusters the --group must me specified', result.output)
 
-    @patch('patroni.dcs.AbstractDCS.set_failover_value', Mock())
+    @patch('patroni.ctl.get_dcs')
-    def test_failover(self):
+    @patch.object(PoolManager, 'request', Mock(return_value=MockResponse()))
+    @patch('patroni.ctl.request_patroni', Mock(return_value=MockResponse()))
+    def test_failover(self, mock_get_dcs):
+        mock_get_dcs.return_value.set_failover_value = Mock()
+
         # No candidate specified
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
         result = self.runner.invoke(ctl, ['failover', 'dummy'], input='0\n')
         self.assertIn('Failover could be performed only to a specific candidate', result.output)
 
-        # Candidate is the same as the leader
+        cluster = get_cluster_initialized_with_leader(sync=('leader', 'other'))
-        result = self.runner.invoke(ctl, ['failover', 'dummy', '--group', '0'], input='leader\n')
-        self.assertIn("Candidate ['other']", result.output)
-        self.assertIn('Member leader is already the leader of cluster dummy', result.output)
 
         # Temp test to check a fallback to switchover if leader is specified
         with patch('patroni.ctl._do_failover_or_switchover') as failover_func_mock:
             result = self.runner.invoke(ctl, ['failover', '--leader', 'leader', 'dummy'], input='0\n')
             self.assertIn('Supplying a leader name using this command is deprecated', result.output)
-            failover_func_mock.assert_called_once_with('switchover', 'dummy', None, 'leader', None, False)
+            failover_func_mock.assert_called_once_with(
+                DEFAULT_CONFIG, 'switchover', 'dummy', None, 'leader', None, False)
 
-        cluster = get_cluster_initialized_with_leader(sync=('leader', 'other'))
+        # Failover to an async member in sync mode (confirm)
         cluster.members.append(Member(0, 'async', 28, {'api_url': 'http://127.0.0.1:8012/patroni'}))
         cluster.config.data['synchronous_mode'] = True
-        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=cluster)):
+        mock_get_dcs.return_value.get_cluster = Mock(return_value=cluster)
-            # Failover to an async member in sync mode (confirm)
+        result = self.runner.invoke(ctl, ['failover', 'dummy', '--group', '0', '--candidate', 'async'], input='y\ny')
-            result = self.runner.invoke(ctl,
+        self.assertIn('Are you sure you want to failover to the asynchronous node async', result.output)
-                                        ['failover', 'dummy', '--group', '0', '--candidate', 'async'], input='y\ny')
-            self.assertIn('Are you sure you want to failover to the asynchronous node async', result.output)
-            self.assertEqual(result.exit_code, 0)
 
-            # Failover to an async member in sync mode (abort)
+        # Failover to an async member in sync mode (abort)
-            result = self.runner.invoke(ctl, ['failover', 'dummy', '--group', '0', '--candidate', 'async'], input='N')
+        mock_get_dcs.return_value.get_cluster = Mock(return_value=cluster)
-            self.assertEqual(result.exit_code, 1)
+        result = self.runner.invoke(ctl, ['failover', 'dummy', '--group', '0', '--candidate', 'async'], input='N')
-            self.assertIn('Aborting failover', result.output)
+        self.assertEqual(result.exit_code, 1)
 
-    @patch('patroni.dynamic_loader.iter_modules', Mock(return_value=['patroni.dcs.dummy', 'patroni.dcs.etcd']))
+    @patch('patroni.dcs.dcs_modules', Mock(return_value=['patroni.dcs.dummy', 'patroni.dcs.etcd']))
     def test_get_dcs(self):
-        with click.Context(click.Command('list')) as ctx:
+        self.assertRaises(PatroniCtlException, get_dcs, {'dummy': {}}, 'dummy', 0)
-            ctx.obj = {'__config': {'dummy': {}}, '__mpp': get_mpp({})}
-            self.assertRaises(PatroniCtlException, get_dcs, 'dummy', 0)
 
     @patch('patroni.psycopg.connect', psycopg_connect)
     @patch('patroni.ctl.query_member', Mock(return_value=([['mock column']], None)))
+    @patch('patroni.ctl.get_dcs')
     @patch.object(etcd.Client, 'read', etcd_read)
-    def test_query(self):
+    def test_query(self, mock_get_dcs):
+        mock_get_dcs.return_value = self.e
         # Mutually exclusive
         for role in self.TEST_ROLES:
             result = self.runner.invoke(ctl, ['query', 'alpha', '--member', 'abc', '--role', role])
@@ -291,29 +286,31 @@ class TestCtl(unittest.TestCase):
     def test_query_member(self):
         with patch('patroni.ctl.get_cursor', Mock(return_value=MockConnect().cursor())):
             for role in self.TEST_ROLES:
-                rows = query_member(None, None, None, None, role, 'SELECT pg_catalog.pg_is_in_recovery()', {})
+                rows = query_member({}, None, None, None, None, role, 'SELECT pg_catalog.pg_is_in_recovery()', {})
                 self.assertTrue('False' in str(rows))
 
             with patch.object(MockCursor, 'execute', Mock(side_effect=OperationalError('bla'))):
-                rows = query_member(None, None, None, None, 'replica', 'SELECT pg_catalog.pg_is_in_recovery()', {})
+                rows = query_member({}, None, None, None, None, 'replica', 'SELECT pg_catalog.pg_is_in_recovery()', {})
 
         with patch('patroni.ctl.get_cursor', Mock(return_value=None)):
             # No role nor member given -- generic message
-            rows = query_member(None, None, None, None, None, 'SELECT pg_catalog.pg_is_in_recovery()', {})
+            rows = query_member({}, None, None, None, None, None, 'SELECT pg_catalog.pg_is_in_recovery()', {})
             self.assertTrue('No connection is available' in str(rows))
 
             # Member given -- message pointing to member
-            rows = query_member(None, None, None, 'foo', None, 'SELECT pg_catalog.pg_is_in_recovery()', {})
+            rows = query_member({}, None, None, None, 'foo', None, 'SELECT pg_catalog.pg_is_in_recovery()', {})
             self.assertTrue('No connection to member foo' in str(rows))
 
             # Role given -- message pointing to role
-            rows = query_member(None, None, None, None, 'replica', 'SELECT pg_catalog.pg_is_in_recovery()', {})
+            rows = query_member({}, None, None, None, None, 'replica', 'SELECT pg_catalog.pg_is_in_recovery()', {})
             self.assertTrue('No connection to role replica' in str(rows))
 
         with patch('patroni.ctl.get_cursor', Mock(side_effect=OperationalError('bla'))):
-            rows = query_member(None, None, None, None, 'replica', 'SELECT pg_catalog.pg_is_in_recovery()', {})
+            rows = query_member({}, None, None, None, None, 'replica', 'SELECT pg_catalog.pg_is_in_recovery()', {})
 
-    def test_dsn(self):
+    @patch('patroni.ctl.get_dcs')
+    def test_dsn(self, mock_get_dcs):
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
         result = self.runner.invoke(ctl, ['dsn', 'alpha'])
         assert 'host=127.0.0.1 port=5435' in result.output
 
@@ -326,8 +323,11 @@ class TestCtl(unittest.TestCase):
         result = self.runner.invoke(ctl, ['dsn', 'alpha', '--member', 'dummy'])
         assert result.exit_code == 1
 
-    @patch('patroni.ctl.request_patroni')
+    @patch.object(PoolManager, 'request')
-    def test_reload(self, mock_post):
+    @patch('patroni.ctl.get_dcs')
+    def test_reload(self, mock_get_dcs, mock_post):
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
+
         result = self.runner.invoke(ctl, ['reload', 'alpha'], input='y')
         assert 'Failed: reload for member' in result.output
 
@@ -339,8 +339,10 @@ class TestCtl(unittest.TestCase):
         result = self.runner.invoke(ctl, ['reload', 'alpha'], input='y')
         assert 'Reload request received for member' in result.output
 
-    @patch('patroni.ctl.request_patroni')
+    @patch.object(PoolManager, 'request')
-    def test_restart_reinit(self, mock_post):
+    @patch('patroni.ctl.get_dcs')
+    def test_restart_reinit(self, mock_get_dcs, mock_post):
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
         mock_post.return_value.status = 503
         result = self.runner.invoke(ctl, ['restart', 'alpha'], input='now\ny\n')
         assert 'Failed: restart for' in result.output
@@ -380,7 +382,7 @@ class TestCtl(unittest.TestCase):
         result = self.runner.invoke(ctl, ['restart', 'alpha', 'other', '--force', '--scheduled', '2300-10-01T14:30'])
         assert 'Failed: flush scheduled restart' in result.output
 
-        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
+        with patch('patroni.config.GlobalConfig.is_paused', PropertyMock(return_value=True)):
             result = self.runner.invoke(ctl,
                                         ['restart', 'alpha', 'other', '--force', '--scheduled', '2300-10-01T14:30'])
             assert result.exit_code == 1
@@ -415,10 +417,12 @@ class TestCtl(unittest.TestCase):
         assert 'Failed: another restart is already' in result.output
         assert result.exit_code == 0
 
-    def test_remove(self):
+    @patch('patroni.ctl.get_dcs')
+    def test_remove(self, mock_get_dcs):
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
         result = self.runner.invoke(ctl, ['remove', 'dummy'], input='\n')
         assert 'For Citus clusters the --group must me specified' in result.output
-        result = self.runner.invoke(ctl, ['remove', 'alpha', '--group', '0'], input='alpha\nstandby')
+        result = self.runner.invoke(ctl, ['-k', 'remove', 'alpha', '--group', '0'], input='alpha\nstandby')
         assert 'Please confirm' in result.output
         assert 'You are about to remove all' in result.output
         # Not typing an exact confirmation
@@ -436,36 +440,37 @@ class TestCtl(unittest.TestCase):
         assert result.exit_code == 0
 
     def test_ctl(self):
+        self.runner.invoke(ctl, ['list'])
+
         result = self.runner.invoke(ctl, ['--help'])
         assert 'Usage:' in result.output
 
     def test_get_any_member(self):
-        with click.Context(click.Command('list')) as ctx:
+        for role in self.TEST_ROLES:
-            ctx.obj = {'__config': {}, '__mpp': get_mpp({})}
+            self.assertIsNone(get_any_member({}, get_cluster_initialized_without_leader(), None, role=role))
-            for role in self.TEST_ROLES:
-                self.assertIsNone(get_any_member(get_cluster_initialized_without_leader(), None, role=role))
 
-                m = get_any_member(get_cluster_initialized_with_leader(), None, role=role)
+            m = get_any_member({}, get_cluster_initialized_with_leader(), None, role=role)
-                self.assertEqual(m.name, 'leader')
+            self.assertEqual(m.name, 'leader')
 
     def test_get_all_members(self):
-        with click.Context(click.Command('list')) as ctx:
+        for role in self.TEST_ROLES:
-            ctx.obj = {'__config': {}, '__mpp': get_mpp({})}
+            self.assertEqual(list(get_all_members({}, get_cluster_initialized_without_leader(), None, role=role)), [])
-            for role in self.TEST_ROLES:
-                self.assertEqual(list(get_all_members(get_cluster_initialized_without_leader(), None, role=role)), [])
 
-                r = list(get_all_members(get_cluster_initialized_with_leader(), None, role=role))
+            r = list(get_all_members({}, get_cluster_initialized_with_leader(), None, role=role))
-                self.assertEqual(len(r), 1)
-                self.assertEqual(r[0].name, 'leader')
-
-            r = list(get_all_members(get_cluster_initialized_with_leader(), None, role='replica'))
             self.assertEqual(len(r), 1)
-            self.assertEqual(r[0].name, 'other')
+            self.assertEqual(r[0].name, 'leader')
 
-            self.assertEqual(len(list(get_all_members(get_cluster_initialized_without_leader(),
+        r = list(get_all_members({}, get_cluster_initialized_with_leader(), None, role='replica'))
-                                                      None, role='replica'))), 2)
+        self.assertEqual(len(r), 1)
+        self.assertEqual(r[0].name, 'other')
+
+        self.assertEqual(len(list(get_all_members({}, get_cluster_initialized_without_leader(),
+                                                  None, role='replica'))), 2)
+
+    @patch('patroni.ctl.get_dcs')
+    def test_members(self, mock_get_dcs):
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
 
-    def test_members(self):
         result = self.runner.invoke(ctl, ['list'])
         assert '127.0.0.1' in result.output
         assert result.exit_code == 0
@@ -474,115 +479,127 @@ class TestCtl(unittest.TestCase):
         result = self.runner.invoke(ctl, ['list', '--group', '0'])
         assert 'Citus cluster: alpha (group: 0, 12345678901) -' in result.output
 
-        config = get_default_config()
+        with patch('patroni.ctl.load_config', Mock(return_value={'scope': 'alpha'})):
-        del config['citus']
-        with patch('patroni.ctl.load_config', Mock(return_value=config)):
             result = self.runner.invoke(ctl, ['list'])
             assert 'Cluster: alpha (12345678901) -' in result.output
 
         with patch('patroni.ctl.load_config', Mock(return_value={})):
             self.runner.invoke(ctl, ['list'])
 
-        cluster = get_cluster_initialized_with_leader()
+    @patch('patroni.ctl.get_dcs')
-        cluster.members[1].data['pending_restart'] = True
+    def test_list_extended(self, mock_get_dcs):
-        cluster.members[1].data['pending_restart_reason'] = {'param': get_param_diff('', 'very l' + 'o' * 34 + 'ng')}
+        mock_get_dcs.return_value = self.e
-        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=cluster)):
+        cluster = get_cluster_initialized_with_leader(sync=('leader', 'other'))
-            for cmd in ('list', 'topology'):
+        mock_get_dcs.return_value.get_cluster = Mock(return_value=cluster)
-                result = self.runner.invoke(ctl, [cmd, 'dummy'])
-                self.assertIn('param: [hidden - too long]', result.output)
 
-            result = self.runner.invoke(ctl, ['list', 'dummy', '-f', 'tsv'])
-            self.assertIn('param: ->very l' + 'o' * 34 + 'ng', result.output)
-
-            cluster.members[1].data['pending_restart_reason'] = {'param': get_param_diff('', 'new')}
-            result = self.runner.invoke(ctl, ['list', 'dummy'])
-            self.assertIn('param: ->new', result.output)
-
-    def test_list_extended(self):
         result = self.runner.invoke(ctl, ['list', 'dummy', '--extended', '--timestamp'])
         assert '2100' in result.output
         assert 'Scheduled restart' in result.output
 
-    def test_topology(self):
+    @patch('patroni.ctl.get_dcs')
+    def test_topology(self, mock_get_dcs):
+        mock_get_dcs.return_value = self.e
         cluster = get_cluster_initialized_with_leader()
-        cluster.members.append(Member(0, 'cascade', 28,
+        cascade_member = Member(0, 'cascade', 28, {'conn_url': 'postgres://replicator:[email protected]:5437/postgres',
-                                      {'conn_url': 'postgres://replicator:[email protected]:5437/postgres',
+                                                   'api_url': 'http://127.0.0.1:8012/patroni',
-                                       'api_url': 'http://127.0.0.1:8012/patroni', 'state': 'running',
+                                                   'state': 'running',
-                                       'tags': {'replicatefrom': 'other'}}))
+                                                   'tags': {'replicatefrom': 'other'},
-        cluster.members.append(Member(0, 'wrong_cascade', 28,
+                                                   })
-                                      {'conn_url': 'postgres://replicator:[email protected]:5438/postgres',
+        cascade_member_wrong_tags = Member(0, 'wrong_cascade', 28,
-                                       'api_url': 'http://127.0.0.1:8013/patroni', 'state': 'running',
+                                           {'conn_url': 'postgres://replicator:[email protected]:5438/postgres',
-                                       'tags': {'replicatefrom': 'nonexistinghost'}}))
+                                            'api_url': 'http://127.0.0.1:8013/patroni',
-        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=cluster)):
+                                            'state': 'running',
-            result = self.runner.invoke(ctl, ['topology', 'dummy'])
+                                            'tags': {'replicatefrom': 'nonexistinghost'},
-            assert '+\n|     0 | leader          | 127.0.0.1:5435 | Leader  |' in result.output
+                                            })
-            assert '|\n|     0 | + other         | 127.0.0.1:5436 | Replica |' in result.output
+        cluster.members.append(cascade_member)
-            assert '|\n|     0 |   + cascade     | 127.0.0.1:5437 | Replica |' in result.output
+        cluster.members.append(cascade_member_wrong_tags)
-            assert '|\n|     0 | + wrong_cascade | 127.0.0.1:5438 | Replica |' in result.output
+        mock_get_dcs.return_value.get_cluster = Mock(return_value=cluster)
+        result = self.runner.invoke(ctl, ['topology', 'dummy'])
+        assert '+\n|     0 | leader          | 127.0.0.1:5435 | Leader  |' in result.output
+        assert '|\n|     0 | + other         | 127.0.0.1:5436 | Replica |' in result.output
+        assert '|\n|     0 |   + cascade     | 127.0.0.1:5437 | Replica |' in result.output
+        assert '|\n|     0 | + wrong_cascade | 127.0.0.1:5438 | Replica |' in result.output
 
-        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_without_leader())):
+        cluster = get_cluster_initialized_without_leader()
-            result = self.runner.invoke(ctl, ['topology', 'dummy'])
+        mock_get_dcs.return_value.get_cluster = Mock(return_value=cluster)
-            assert '+\n|     0 | + leader | 127.0.0.1:5435 | Replica |' in result.output
+        result = self.runner.invoke(ctl, ['topology', 'dummy'])
-            assert '|\n|     0 | + other  | 127.0.0.1:5436 | Replica |' in result.output
+        assert '+\n|     0 | + leader | 127.0.0.1:5435 | Replica |' in result.output
+        assert '|\n|     0 | + other  | 127.0.0.1:5436 | Replica |' in result.output
+
+    @patch('patroni.ctl.get_dcs')
+    @patch.object(PoolManager, 'request', Mock(return_value=MockResponse()))
+    def test_flush_restart(self, mock_get_dcs):
+        mock_get_dcs.return_value = self.e
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
 
-    @patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_with_leader()))
-    def test_flush_restart(self):
         for role in self.TEST_ROLES:
-            result = self.runner.invoke(ctl, ['flush', 'dummy', 'restart', '-r', role], input='y')
+            result = self.runner.invoke(ctl, ['-k', 'flush', 'dummy', 'restart', '-r', role], input='y')
             assert 'No scheduled restart' in result.output
 
         result = self.runner.invoke(ctl, ['flush', 'dummy', 'restart', '--force'])
         assert 'Success: flush scheduled restart' in result.output
-        with patch('patroni.ctl.request_patroni', Mock(return_value=MockResponse(404))):
+        with patch.object(PoolManager, 'request', return_value=MockResponse(404)):
             result = self.runner.invoke(ctl, ['flush', 'dummy', 'restart', '--force'])
             assert 'Failed: flush scheduled restart' in result.output
 
-    def test_flush_switchover(self):
+    @patch('patroni.ctl.get_dcs')
-        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_with_leader())):
+    @patch.object(PoolManager, 'request', Mock(return_value=MockResponse()))
-            result = self.runner.invoke(ctl, ['flush', 'dummy', 'switchover'])
+    def test_flush_switchover(self, mock_get_dcs):
-            assert 'No pending scheduled switchover' in result.output
+        mock_get_dcs.return_value = self.e
+
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
+        result = self.runner.invoke(ctl, ['flush', 'dummy', 'switchover'])
+        assert 'No pending scheduled switchover' in result.output
 
         scheduled_at = datetime.now(tzutc) + timedelta(seconds=600)
-        with patch('patroni.dcs.AbstractDCS.get_cluster',
+        mock_get_dcs.return_value.get_cluster = Mock(
-                   Mock(return_value=get_cluster_initialized_with_leader(Failover(1, 'a', 'b', scheduled_at)))):
+            return_value=get_cluster_initialized_with_leader(Failover(1, 'a', 'b', scheduled_at)))
-            result = self.runner.invoke(ctl, ['-k', 'flush', 'dummy', 'switchover'])
+        result = self.runner.invoke(ctl, ['flush', 'dummy', 'switchover'])
-            assert result.output.startswith('Success: ')
+        assert result.output.startswith('Success: ')
 
-            with patch('patroni.ctl.request_patroni', side_effect=[MockResponse(409), Exception]), \
+        mock_get_dcs.return_value.manual_failover = Mock()
-                    patch('patroni.dcs.AbstractDCS.manual_failover', Mock()):
+        with patch.object(PoolManager, 'request', side_effect=[MockResponse(409), Exception]):
-                result = self.runner.invoke(ctl, ['flush', 'dummy', 'switchover'])
+            result = self.runner.invoke(ctl, ['flush', 'dummy', 'switchover'])
-                assert 'Could not find any accessible member of cluster' in result.output
+            assert 'Could not find any accessible member of cluster' in result.output
 
+    @patch.object(PoolManager, 'request')
+    @patch('patroni.ctl.get_dcs')
     @patch('patroni.ctl.polling_loop', Mock(return_value=[1]))
-    def test_pause_cluster(self):
+    def test_pause_cluster(self, mock_get_dcs, mock_post):
-        with patch('patroni.ctl.request_patroni', Mock(return_value=MockResponse(500))):
+        mock_get_dcs.return_value = self.e
-            result = self.runner.invoke(ctl, ['pause', 'dummy'])
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
-            assert 'Failed' in result.output
 
-        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
+        mock_post.return_value.status = 500
+        result = self.runner.invoke(ctl, ['pause', 'dummy'])
+        assert 'Failed' in result.output
+
+        mock_post.return_value.status = 200
+        with patch('patroni.config.GlobalConfig.is_paused', PropertyMock(return_value=True)):
             result = self.runner.invoke(ctl, ['pause', 'dummy'])
             assert 'Cluster is already paused' in result.output
 
         result = self.runner.invoke(ctl, ['pause', 'dummy', '--wait'])
         assert "'pause' request sent" in result.output
+        mock_get_dcs.return_value.get_cluster = Mock(side_effect=[get_cluster_initialized_with_leader(),
+                                                                  get_cluster(None, None, [], None, None)])
+        self.runner.invoke(ctl, ['pause', 'dummy', '--wait'])
+        member = Member(1, 'other', 28, {})
+        mock_get_dcs.return_value.get_cluster = Mock(side_effect=[get_cluster_initialized_with_leader(),
+                                                                  get_cluster(None, None, [member], None, None)])
+        self.runner.invoke(ctl, ['pause', 'dummy', '--wait'])
 
-        with patch('patroni.dcs.AbstractDCS.get_cluster',
+    @patch.object(PoolManager, 'request')
-                   Mock(side_effect=[get_cluster_initialized_with_leader(), get_cluster(None, None, [], None, None)])):
+    @patch('patroni.ctl.get_dcs')
-            self.runner.invoke(ctl, ['pause', 'dummy', '--wait'])
+    def test_resume_cluster(self, mock_get_dcs, mock_post):
-        with patch('patroni.dcs.AbstractDCS.get_cluster',
+        mock_get_dcs.return_value = self.e
-                   Mock(side_effect=[get_cluster_initialized_with_leader(),
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
-                                     get_cluster(None, None, [Member(1, 'other', 28, {})], None, None)])):
-            self.runner.invoke(ctl, ['pause', 'dummy', '--wait'])
 
-    @patch('patroni.ctl.request_patroni')
-    @patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=get_cluster_initialized_with_leader()))
-    def test_resume_cluster(self, mock_post):
         mock_post.return_value.status = 200
-        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=False)):
+        with patch('patroni.config.GlobalConfig.is_paused', PropertyMock(return_value=False)):
             result = self.runner.invoke(ctl, ['resume', 'dummy'])
             assert 'Cluster is not paused' in result.output
 
-        with patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)):
+        with patch('patroni.config.GlobalConfig.is_paused', PropertyMock(return_value=True)):
             result = self.runner.invoke(ctl, ['resume', 'dummy'])
             assert 'Success' in result.output
 
@@ -684,53 +701,67 @@ class TestCtl(unittest.TestCase):
             with patch('shutil.which', Mock(return_value=e)):
                 self.assertRaises(PatroniCtlException, invoke_editor, 'foo: bar\n', 'test')
 
-    def test_show_config(self):
+    @patch('patroni.ctl.get_dcs')
+    def test_show_config(self, mock_get_dcs):
+        mock_get_dcs.return_value = self.e
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
         self.runner.invoke(ctl, ['show-config', 'dummy'])
 
+    @patch('patroni.ctl.get_dcs')
     @patch('subprocess.call', Mock(return_value=0))
-    def test_edit_config(self):
+    def test_edit_config(self, mock_get_dcs):
+        mock_get_dcs.return_value = self.e
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
+        mock_get_dcs.return_value.set_config_value = Mock(return_value=False)
         os.environ['EDITOR'] = 'true'
         self.runner.invoke(ctl, ['edit-config', 'dummy'])
         self.runner.invoke(ctl, ['edit-config', 'dummy', '-s', 'foo=bar'])
         self.runner.invoke(ctl, ['edit-config', 'dummy', '--replace', 'postgres0.yml'])
         self.runner.invoke(ctl, ['edit-config', 'dummy', '--apply', '-'], input='foo: bar')
         self.runner.invoke(ctl, ['edit-config', 'dummy', '--force', '--apply', '-'], input='foo: bar')
-        with patch('patroni.dcs.etcd.Etcd.set_config_value', Mock(return_value=True)):
+        mock_get_dcs.return_value.set_config_value.return_value = True
-            self.runner.invoke(ctl, ['edit-config', 'dummy', '--force', '--apply', '-'], input='foo: bar')
+        self.runner.invoke(ctl, ['edit-config', 'dummy', '--force', '--apply', '-'], input='foo: bar')
-        with patch('patroni.dcs.AbstractDCS.get_cluster', Mock(return_value=Cluster.empty())):
+        mock_get_dcs.return_value.get_cluster = Mock(return_value=Cluster.empty())
-            result = self.runner.invoke(ctl, ['edit-config', 'dummy'])
+        result = self.runner.invoke(ctl, ['edit-config', 'dummy'])
-            assert result.exit_code == 1
+        assert result.exit_code == 1
-            assert 'The config key does not exist in the cluster dummy' in result.output
+        assert 'The config key does not exist in the cluster dummy' in result.output
 
-    @patch('patroni.ctl.request_patroni')
+    @patch('patroni.ctl.get_dcs')
-    def test_version(self, mock_request):
+    def test_version(self, mock_get_dcs):
-        result = self.runner.invoke(ctl, ['version'])
+        mock_get_dcs.return_value = self.e
-        assert 'patronictl version' in result.output
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
-        mock_request.return_value.data = b'{"patroni":{"version":"1.2.3"},"server_version": 100001}'
+        with patch.object(PoolManager, 'request') as mocked:
-        result = self.runner.invoke(ctl, ['version', 'dummy'])
+            result = self.runner.invoke(ctl, ['version'])
-        assert '1.2.3' in result.output
+            assert 'patronictl version' in result.output
-        mock_request.side_effect = Exception
+            mocked.return_value.data = b'{"patroni":{"version":"1.2.3"},"server_version": 100001}'
-        result = self.runner.invoke(ctl, ['version', 'dummy'])
+            result = self.runner.invoke(ctl, ['version', 'dummy'])
-        assert 'failed to get version' in result.output
+            assert '1.2.3' in result.output
+        with patch.object(PoolManager, 'request', Mock(side_effect=Exception)):
+            result = self.runner.invoke(ctl, ['version', 'dummy'])
+            assert 'failed to get version' in result.output
 
-    def test_history(self):
+    @patch('patroni.ctl.get_dcs')
-        with patch('patroni.dcs.AbstractDCS.get_cluster') as mock_get_cluster:
+    def test_history(self, mock_get_dcs):
-            mock_get_cluster.return_value.history.lines = [[1, 67176, 'no recovery target specified']]
+        mock_get_dcs.return_value.get_cluster = Mock()
-            result = self.runner.invoke(ctl, ['history'])
+        mock_get_dcs.return_value.get_cluster.return_value.history.lines = [[1, 67176, 'no recovery target specified']]
-            assert 'Reason' in result.output
+        result = self.runner.invoke(ctl, ['history'])
+        assert 'Reason' in result.output
 
     def test_format_pg_version(self):
         self.assertEqual(format_pg_version(100001), '10.1')
         self.assertEqual(format_pg_version(90605), '9.6.5')
 
-    def test_get_members(self):
+    @patch('patroni.ctl.get_dcs')
-        with patch('patroni.dcs.AbstractDCS.get_cluster',
+    def test_get_members(self, mock_get_dcs):
-                   Mock(return_value=get_cluster_not_initialized_without_leader())):
+        mock_get_dcs.return_value = self.e
-            result = self.runner.invoke(ctl, ['reinit', 'dummy'])
+        mock_get_dcs.return_value.get_cluster = get_cluster_not_initialized_without_leader
-            assert "cluster doesn\'t have any members" in result.output
+        result = self.runner.invoke(ctl, ['reinit', 'dummy'])
+        assert "cluster doesn\'t have any members" in result.output
 
     @patch('time.sleep', Mock())
-    def test_reinit_wait(self):
+    @patch('patroni.ctl.get_dcs')
+    def test_reinit_wait(self, mock_get_dcs):
+        mock_get_dcs.return_value.get_cluster = get_cluster_initialized_with_leader
         with patch.object(PoolManager, 'request') as mocked:
             mocked.side_effect = [Mock(data=s, status=200) for s in
                                   [b"reinitialize", b'{"state":"creating replica"}', b'{"state":"running"}']]

tests/test_etcd.py

@@ -5,10 +5,8 @@ import unittest
 
 from dns.exception import DNSException
 from mock import Mock, PropertyMock, patch
-from patroni.dcs import get_dcs
 from patroni.dcs.etcd import AbstractDCS, EtcdClient, Cluster, Etcd, EtcdError, DnsCachingResolver
 from patroni.exceptions import DCSError
-from patroni.postgresql.mpp import get_mpp
 from patroni.utils import Retry
 from urllib3.exceptions import ReadTimeoutError
 
@@ -140,9 +138,8 @@ class TestClient(unittest.TestCase):
     @patch.object(EtcdClient, '_get_machines_list',
                   Mock(return_value=['http://localhost:2379', 'http://localhost:4001']))
     def setUp(self):
-        self.etcd = get_dcs({'namespace': '/patroni/', 'ttl': 30, 'retry_timeout': 3,
+        self.etcd = Etcd({'namespace': '/patroni/', 'ttl': 30, 'retry_timeout': 3,
-                             'etcd': {'srv': 'test'}, 'scope': 'test', 'name': 'foo'})
+                          'srv': 'test', 'scope': 'test', 'name': 'foo'})
-        self.assertIsInstance(self.etcd, Etcd)
         self.client = self.etcd._client
         self.client.http.request = http_request
         self.client.http.request_encode_body = http_request
@@ -238,7 +235,7 @@ class TestEtcd(unittest.TestCase):
                   Mock(return_value=['http://localhost:2379', 'http://localhost:4001']))
     def setUp(self):
         self.etcd = Etcd({'namespace': '/patroni/', 'ttl': 30, 'retry_timeout': 10,
-                          'host': 'localhost:2379', 'scope': 'test', 'name': 'foo'}, get_mpp({}))
+                          'host': 'localhost:2379', 'scope': 'test', 'name': 'foo'})
 
     def test_base_path(self):
         self.assertEqual(self.etcd._base_path, '/patroni/test')
@@ -273,7 +270,7 @@ class TestEtcd(unittest.TestCase):
         self.assertRaises(EtcdError, self.etcd.get_cluster)
 
     def test__get_citus_cluster(self):
-        self.etcd._mpp = get_mpp({'citus': {'group': 0, 'database': 'postgres'}})
+        self.etcd._citus_group = '0'
         cluster = self.etcd.get_cluster()
         self.assertIsInstance(cluster, Cluster)
         self.assertIsInstance(cluster.workers[1], Cluster)

tests/test_etcd3.py

@@ -4,12 +4,10 @@ import unittest
 import urllib3
 
 from mock import Mock, PropertyMock, patch
-from patroni.dcs import get_dcs
 from patroni.dcs.etcd import DnsCachingResolver
 from patroni.dcs.etcd3 import PatroniEtcd3Client, Cluster, Etcd3, Etcd3Client, \
     Etcd3Error, Etcd3ClientError, ReAuthenticateMode, RetryFailedError, InvalidAuthToken, Unavailable, \
     Unknown, UnsupportedEtcdVersion, UserEmpty, AuthFailed, AuthOldRevision, base64_encode
-from patroni.postgresql.mpp import get_mpp
 from threading import Thread
 
 from . import SleepException, MockResponse
@@ -82,9 +80,9 @@ class BaseTestEtcd3(unittest.TestCase):
     @patch.object(Thread, 'start', Mock())
     @patch.object(urllib3.PoolManager, 'urlopen', mock_urlopen)
     def setUp(self):
-        self.etcd3 = get_dcs({'namespace': '/patroni/', 'ttl': 30, 'retry_timeout': 10, 'name': 'foo', 'scope': 'test',
+        self.etcd3 = Etcd3({'namespace': '/patroni/', 'ttl': 30, 'retry_timeout': 10,
-                              'etcd3': {'host': 'localhost:2378', 'username': 'etcduser', 'password': 'etcdpassword'}})
+                            'host': 'localhost:2378', 'scope': 'test', 'name': 'foo',
-        self.assertIsInstance(self.etcd3, Etcd3)
+                            'username': 'etcduser', 'password': 'etcdpassword'})
         self.client = self.etcd3._client
         self.kv_cache = self.client._kv_cache
 
@@ -238,7 +236,7 @@ class TestEtcd3(BaseTestEtcd3):
             self.assertRaises(Etcd3Error, self.etcd3.get_cluster)
 
     def test__get_citus_cluster(self):
-        self.etcd3._mpp = get_mpp({'citus': {'group': 0, 'database': 'postgres'}})
+        self.etcd3._citus_group = '0'
         cluster = self.etcd3.get_cluster()
         self.assertIsInstance(cluster, Cluster)
         self.assertIsInstance(cluster.workers[1], Cluster)

tests/test_exhibitor.py

@@ -2,7 +2,6 @@ import unittest
 import urllib3
 
 from mock import Mock, patch
-from patroni.dcs import get_dcs
 from patroni.dcs.exhibitor import ExhibitorEnsembleProvider, Exhibitor
 from patroni.dcs.zookeeper import ZooKeeperError
 
@@ -27,9 +26,8 @@ class TestExhibitor(unittest.TestCase):
         status=200, body=b'{"servers":["127.0.0.1","127.0.0.2","127.0.0.3"],"port":2181}')))
     @patch('patroni.dcs.zookeeper.PatroniKazooClient', MockKazooClient)
     def setUp(self):
-        self.e = get_dcs({'exhibitor': {'hosts': ['localhost', 'exhibitor'], 'port': 8181},
+        self.e = Exhibitor({'hosts': ['localhost', 'exhibitor'], 'port': 8181, 'scope': 'test',
-                          'scope': 'test', 'name': 'foo', 'ttl': 30, 'retry_timeout': 10})
+                            'name': 'foo', 'ttl': 30, 'retry_timeout': 10})
-        self.assertIsInstance(self.e, Exhibitor)
 
     @patch.object(ExhibitorEnsembleProvider, 'poll', Mock(return_value=True))
     @patch.object(MockKazooClient, 'get_children', Mock(side_effect=Exception))

tests/test_ha.py

@@ -4,7 +4,6 @@ import os
 import sys
 
 from mock import Mock, MagicMock, PropertyMock, patch, mock_open
-from patroni import global_config
 from patroni.collections import CaseInsensitiveSet
 from patroni.config import Config
 from patroni.dcs import Cluster, ClusterConfig, Failover, Leader, Member, get_dcs, Status, SyncState, TimelineHistory
@@ -197,7 +196,7 @@ def run_async(self, func, args=()):
 @patch('patroni.async_executor.AsyncExecutor.busy', PropertyMock(return_value=False))
 @patch('patroni.async_executor.AsyncExecutor.run_async', run_async)
 @patch('patroni.postgresql.rewind.Thread', Mock())
-@patch('patroni.postgresql.mpp.citus.CitusHandler.start', Mock())
+@patch('patroni.postgresql.citus.CitusHandler.start', Mock())
 @patch('subprocess.call', Mock(return_value=0))
 @patch('time.sleep', Mock())
 class TestHa(PostgresInit):
@@ -218,7 +217,6 @@ class TestHa(PostgresInit):
         self.ha = Ha(MockPatroni(self.p, self.e))
         self.ha.old_cluster = self.e.get_cluster()
         self.ha.cluster = get_cluster_initialized_without_leader()
-        global_config.update(self.ha.cluster)
         self.ha.load_cluster_from_dcs = Mock()
 
     def test_update_lock(self):
@@ -253,10 +251,8 @@ class TestHa(PostgresInit):
     @patch('patroni.dcs.etcd.Etcd.initialize', return_value=True)
     def test_bootstrap_as_standby_leader(self, initialize):
         self.p.data_directory_empty = true
-        self.ha.cluster = get_cluster_not_initialized_without_leader(
-            cluster_config=ClusterConfig(1, {"standby_cluster": {"port": 5432}}, 1))
-        global_config.update(self.ha.cluster)
         self.ha.cluster = get_cluster_not_initialized_without_leader(cluster_config=ClusterConfig(0, {}, 0))
+        self.ha.patroni.config._dynamic_configuration = {"standby_cluster": {"port": 5432}}
         self.assertEqual(self.ha.run_cycle(), 'trying to bootstrap a new standby leader')
 
     def test_bootstrap_waiting_for_standby_leader(self):
@@ -322,7 +318,7 @@ class TestHa(PostgresInit):
             self.ha.state_handler.cancellable._process = Mock()
             self.ha._crash_recovery_started -= 600
             self.ha.cluster.config.data.update({'maximum_lag_on_failover': 10})
-            global_config.update(self.ha.cluster)
+            self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
             self.assertEqual(self.ha.run_cycle(), 'terminated crash recovery because of startup timeout')
 
     @patch.object(Rewind, 'ensure_clean_shutdown', Mock())
@@ -513,7 +509,7 @@ class TestHa(PostgresInit):
     def test_check_failsafe_topology(self):
         self.ha.load_cluster_from_dcs = Mock(side_effect=DCSError('Etcd is not responding properly'))
         self.ha.cluster = get_cluster_initialized_with_leader_and_failsafe()
-        global_config.update(self.ha.cluster)
+        self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
         self.ha.dcs._last_failsafe = self.ha.cluster.failsafe
         self.assertEqual(self.ha.run_cycle(), 'demoting self because DCS is not accessible and I was a leader')
         self.ha.state_handler.name = self.ha.cluster.leader.name
@@ -533,7 +529,7 @@ class TestHa(PostgresInit):
     def test_no_dcs_connection_primary_failsafe(self):
         self.ha.load_cluster_from_dcs = Mock(side_effect=DCSError('Etcd is not responding properly'))
         self.ha.cluster = get_cluster_initialized_with_leader_and_failsafe()
-        global_config.update(self.ha.cluster)
+        self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
         self.ha.dcs._last_failsafe = self.ha.cluster.failsafe
         self.ha.state_handler.name = self.ha.cluster.leader.name
         self.assertEqual(self.ha.run_cycle(),
@@ -550,7 +546,7 @@ class TestHa(PostgresInit):
     def test_no_dcs_connection_replica_failsafe(self):
         self.ha.load_cluster_from_dcs = Mock(side_effect=DCSError('Etcd is not responding properly'))
         self.ha.cluster = get_cluster_initialized_with_leader_and_failsafe()
-        global_config.update(self.ha.cluster)
+        self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
         self.ha.update_failsafe({'name': 'leader', 'api_url': 'http://127.0.0.1:8008/patroni',
                                  'conn_url': 'postgres://127.0.0.1:5432/postgres', 'slots': {'foo': 1000}})
         self.p.is_primary = false
@@ -593,8 +589,8 @@ class TestHa(PostgresInit):
         self.assertEqual(self.ha.bootstrap(), 'failed to acquire initialize lock')
 
     @patch('patroni.psycopg.connect', psycopg_connect)
-    @patch('patroni.postgresql.mpp.citus.connect', psycopg_connect)
+    @patch('patroni.postgresql.citus.connect', psycopg_connect)
-    @patch('patroni.postgresql.mpp.citus.quote_ident', Mock())
+    @patch('patroni.postgresql.citus.quote_ident', Mock())
     @patch.object(Postgresql, 'connection', Mock(return_value=None))
     def test_bootstrap_initialized_new_cluster(self):
         self.ha.cluster = get_cluster_not_initialized_without_leader()
@@ -615,8 +611,8 @@ class TestHa(PostgresInit):
         self.assertRaises(PatroniFatalException, self.ha.post_bootstrap)
 
     @patch('patroni.psycopg.connect', psycopg_connect)
-    @patch('patroni.postgresql.mpp.citus.connect', psycopg_connect)
+    @patch('patroni.postgresql.citus.connect', psycopg_connect)
-    @patch('patroni.postgresql.mpp.citus.quote_ident', Mock())
+    @patch('patroni.postgresql.citus.quote_ident', Mock())
     @patch.object(Postgresql, 'connection', Mock(return_value=None))
     def test_bootstrap_release_initialize_key_on_watchdog_failure(self):
         self.ha.cluster = get_cluster_not_initialized_without_leader()
@@ -659,7 +655,7 @@ class TestHa(PostgresInit):
     @patch.object(ConfigHandler, 'replace_pg_hba', Mock())
     @patch.object(ConfigHandler, 'replace_pg_ident', Mock())
     @patch.object(PostmasterProcess, 'start', Mock(return_value=MockPostmaster()))
-    @patch('patroni.postgresql.mpp.AbstractMPPHandler.is_coordinator', Mock(return_value=False))
+    @patch('patroni.postgresql.citus.CitusHandler.is_coordinator', Mock(return_value=False))
     def test_worker_restart(self):
         self.ha.has_lock = true
         self.ha.patroni.request = Mock()
@@ -694,7 +690,7 @@ class TestHa(PostgresInit):
             self.ha.is_paused = true
             self.assertEqual(self.ha.run_cycle(), 'PAUSE: restart in progress')
 
-    @patch('patroni.postgresql.mpp.AbstractMPPHandler.is_coordinator', Mock(return_value=False))
+    @patch('patroni.postgresql.citus.CitusHandler.is_coordinator', Mock(return_value=False))
     def test_manual_failover_from_leader(self):
         self.ha.has_lock = true  # I am the leader
 
@@ -733,7 +729,7 @@ class TestHa(PostgresInit):
                              ('Member %s exceeds maximum replication lag', 'b'))
             self.ha.cluster.members.pop()
 
-    @patch('patroni.postgresql.mpp.AbstractMPPHandler.is_coordinator', Mock(return_value=False))
+    @patch('patroni.postgresql.citus.CitusHandler.is_coordinator', Mock(return_value=False))
     def test_manual_switchover_from_leader(self):
         self.ha.has_lock = true  # I am the leader
 
@@ -770,11 +766,11 @@ class TestHa(PostgresInit):
         with patch('patroni.ha.logger.info') as mock_info:
             self.ha.fetch_node_status = get_node_status(wal_position=1)
             self.ha.cluster.config.data.update({'maximum_lag_on_failover': 5})
-            global_config.update(self.ha.cluster)
+            self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
             self.assertEqual(self.ha.run_cycle(), 'no action. I am (postgresql0), the leader with the lock')
             self.assertEqual(mock_info.call_args_list[0][0], ('Member %s exceeds maximum replication lag', 'leader'))
 
-    @patch('patroni.postgresql.mpp.AbstractMPPHandler.is_coordinator', Mock(return_value=False))
+    @patch('patroni.postgresql.citus.CitusHandler.is_coordinator', Mock(return_value=False))
     def test_scheduled_switchover_from_leader(self):
         self.ha.has_lock = true  # I am the leader
 
@@ -1036,7 +1032,7 @@ class TestHa(PostgresInit):
     def test__is_healthiest_node(self):
         self.p.is_primary = false
         self.ha.cluster = get_cluster_initialized_without_leader(sync=('postgresql1', self.p.name))
-        global_config.update(self.ha.cluster)
+        self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
         self.assertTrue(self.ha._is_healthiest_node(self.ha.old_cluster.members))
         self.ha.fetch_node_status = get_node_status()  # accessible, in_recovery
         self.assertTrue(self.ha._is_healthiest_node(self.ha.old_cluster.members))
@@ -1053,7 +1049,7 @@ class TestHa(PostgresInit):
         with patch.object(Ha, 'is_synchronous_mode', Mock(return_value=True)):
             self.assertTrue(self.ha._is_healthiest_node(self.ha.old_cluster.members))
         self.ha.cluster.config.data.update({'maximum_lag_on_failover': 5})
-        global_config.update(self.ha.cluster)
+        self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
         with patch('patroni.postgresql.Postgresql.last_operation', return_value=1):
             self.assertFalse(self.ha._is_healthiest_node(self.ha.old_cluster.members))
         with patch('patroni.postgresql.Postgresql.replica_cached_timeline', return_value=None):
@@ -1276,7 +1272,7 @@ class TestHa(PostgresInit):
         self.p.is_running = false
         self.ha.cluster = get_cluster_initialized_with_leader(sync=(self.p.name, 'other'))
         self.ha.cluster.config.data.update({'synchronous_mode': True, 'primary_start_timeout': 0})
-        global_config.update(self.ha.cluster)
+        self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
         self.ha.has_lock = true
         self.ha.update_lock = true
         self.ha.fetch_node_status = get_node_status()  # accessible, in_recovery
@@ -1286,13 +1282,13 @@ class TestHa(PostgresInit):
     def test_primary_stop_timeout(self):
         self.assertEqual(self.ha.primary_stop_timeout(), None)
         self.ha.cluster.config.data.update({'primary_stop_timeout': 30})
-        global_config.update(self.ha.cluster)
+        self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
         with patch.object(Ha, 'is_synchronous_mode', Mock(return_value=True)):
             self.assertEqual(self.ha.primary_stop_timeout(), 30)
         with patch.object(Ha, 'is_synchronous_mode', Mock(return_value=False)):
             self.assertEqual(self.ha.primary_stop_timeout(), None)
             self.ha.cluster.config.data['primary_stop_timeout'] = None
-            global_config.update(self.ha.cluster)
+            self.ha.global_config = self.ha.patroni.config.get_global_config(self.ha.cluster)
             self.assertEqual(self.ha.primary_stop_timeout(), None)
 
     @patch('patroni.postgresql.Postgresql.follow')
@@ -1384,9 +1380,8 @@ class TestHa(PostgresInit):
         # Test sync set to '*' when synchronous_mode_strict is enabled
         mock_set_sync.reset_mock()
         self.p.sync_handler.current_state = Mock(return_value=(CaseInsensitiveSet(), CaseInsensitiveSet()))
-        self.ha.cluster.config.data['synchronous_mode_strict'] = True
+        with patch('patroni.config.GlobalConfig.is_synchronous_mode_strict', PropertyMock(return_value=True)):
-        global_config.update(self.ha.cluster)
+            self.ha.run_cycle()
-        self.ha.run_cycle()
         mock_set_sync.assert_called_once_with(CaseInsensitiveSet('*'))
 
     def test_sync_replication_become_primary(self):
@@ -1519,6 +1514,7 @@ class TestHa(PostgresInit):
 
     @patch('patroni.postgresql.mtime', Mock(return_value=1588316884))
     @patch('builtins.open', Mock(side_effect=Exception))
+    @patch.object(Cluster, 'is_unlocked', Mock(return_value=False))
     def test_restore_cluster_config(self):
         self.ha.cluster.config.data.clear()
         self.ha.has_lock = true
@@ -1544,7 +1540,7 @@ class TestHa(PostgresInit):
         self.ha.is_failover_possible = true
         self.ha.shutdown()
 
-    @patch('patroni.postgresql.mpp.AbstractMPPHandler.is_coordinator', Mock(return_value=False))
+    @patch('patroni.postgresql.citus.CitusHandler.is_coordinator', Mock(return_value=False))
     def test_shutdown_citus_worker(self):
         self.ha.is_leader = true
         self.p.is_running = Mock(side_effect=[Mock(), False])
@@ -1585,11 +1581,6 @@ class TestHa(PostgresInit):
         self.p.is_primary = false
         self.ha.run_cycle()
         exit_mock.assert_called_once_with(1)
-        self.p.set_role('replica')
-        self.ha.dcs.initialize = Mock()
-        with patch.object(Postgresql, 'cb_called', PropertyMock(return_value=True)):
-            self.assertEqual(self.ha.run_cycle(), 'promoted self to leader by acquiring session lock')
-        self.ha.dcs.initialize.assert_not_called()
 
     @patch.object(Cluster, 'is_unlocked', Mock(return_value=False))
     def test_after_pause(self):
@@ -1656,16 +1647,15 @@ class TestHa(PostgresInit):
         self.assertRaises(DCSError, self.ha.acquire_lock)
         self.assertFalse(self.ha.acquire_lock())
 
-    @patch('patroni.postgresql.mpp.AbstractMPPHandler.is_coordinator', Mock(return_value=False))
+    @patch('patroni.postgresql.citus.CitusHandler.is_coordinator', Mock(return_value=False))
     def test_notify_citus_coordinator(self):
         self.ha.patroni.request = Mock()
-        self.ha.notify_mpp_coordinator('before_demote')
+        self.ha.notify_citus_coordinator('before_demote')
         self.ha.patroni.request.assert_called_once()
         self.assertEqual(self.ha.patroni.request.call_args[1]['timeout'], 30)
         self.ha.patroni.request = Mock(side_effect=Exception)
         with patch('patroni.ha.logger.warning') as mock_logger:
-            self.ha.notify_mpp_coordinator('before_promote')
+            self.ha.notify_citus_coordinator('before_promote')
             self.assertEqual(self.ha.patroni.request.call_args[1]['timeout'], 2)
             mock_logger.assert_called()
-            self.assertTrue(mock_logger.call_args[0][0].startswith('Request to %s coordinator leader'))
+            self.assertTrue(mock_logger.call_args[0][0].startswith('Request to Citus coordinator'))
-            self.assertEqual(mock_logger.call_args[0][1], 'Citus')

tests/test_kubernetes.py

@@ -8,17 +8,14 @@ import unittest
 import urllib3
 
 from mock import Mock, PropertyMock, mock_open, patch
-from patroni.dcs import get_dcs
 from patroni.dcs.kubernetes import Cluster, k8s_client, k8s_config, K8sConfig, K8sConnectionFailed, \
     K8sException, K8sObject, Kubernetes, KubernetesError, KubernetesRetriableException, \
     Retry, RetryFailedError, SERVICE_HOST_ENV_NAME, SERVICE_PORT_ENV_NAME
-from patroni.postgresql.mpp import get_mpp
 from threading import Thread
 from . import MockResponse, SleepException
 
 
 def mock_list_namespaced_config_map(*args, **kwargs):
-    k8s_group_label = get_mpp({'citus': {'group': 0, 'database': 'postgres'}}).k8s_group_label
     metadata = {'resource_version': '1', 'labels': {'f': 'b'}, 'name': 'test-config',
                 'annotations': {'initialize': '123', 'config': '{}'}}
     items = [k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata))]
@@ -29,16 +26,16 @@ def mock_list_namespaced_config_map(*args, **kwargs):
     items.append(k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata)))
     metadata.update({'name': 'test-sync', 'annotations': {'leader': 'p-0'}})
     items.append(k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata)))
-    metadata.update({'name': 'test-0-leader', 'labels': {k8s_group_label: '0'},
+    metadata.update({'name': 'test-0-leader', 'labels': {Kubernetes._CITUS_LABEL: '0'},
                      'annotations': {'optime': '1234x', 'leader': 'p-0', 'ttl': '30s', 'slots': '{', 'failsafe': '{'}})
     items.append(k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata)))
-    metadata.update({'name': 'test-0-config', 'labels': {k8s_group_label: '0'},
+    metadata.update({'name': 'test-0-config', 'labels': {Kubernetes._CITUS_LABEL: '0'},
                      'annotations': {'initialize': '123', 'config': '{}'}})
     items.append(k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata)))
-    metadata.update({'name': 'test-1-leader', 'labels': {k8s_group_label: '1'},
+    metadata.update({'name': 'test-1-leader', 'labels': {Kubernetes._CITUS_LABEL: '1'},
                      'annotations': {'leader': 'p-3', 'ttl': '30s'}})
     items.append(k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata)))
-    metadata.update({'name': 'test-2-config', 'labels': {k8s_group_label: '2'}, 'annotations': {}})
+    metadata.update({'name': 'test-2-config', 'labels': {Kubernetes._CITUS_LABEL: '2'}, 'annotations': {}})
     items.append(k8s_client.V1ConfigMap(metadata=k8s_client.V1ObjectMeta(**metadata)))
 
     metadata = k8s_client.V1ObjectMeta(resource_version='1')
@@ -63,8 +60,7 @@ def mock_list_namespaced_endpoints(*args, **kwargs):
 
 
 def mock_list_namespaced_pod(*args, **kwargs):
-    k8s_group_label = get_mpp({'citus': {'group': 0, 'database': 'postgres'}}).k8s_group_label
+    metadata = k8s_client.V1ObjectMeta(resource_version='1', labels={'f': 'b', Kubernetes._CITUS_LABEL: '1'},
-    metadata = k8s_client.V1ObjectMeta(resource_version='1', labels={'f': 'b', k8s_group_label: '1'},
                                        name='p-0', annotations={'status': '{}'},
                                        uid='964dfeae-e79b-4476-8a5a-1920b5c2a69d')
     status = k8s_client.V1PodStatus(pod_ip='10.0.0.1')
@@ -229,12 +225,11 @@ class BaseTestKubernetes(unittest.TestCase):
     @patch.object(k8s_client.CoreV1Api, 'list_namespaced_pod', mock_list_namespaced_pod, create=True)
     @patch.object(k8s_client.CoreV1Api, 'list_namespaced_config_map', mock_list_namespaced_config_map, create=True)
     def setUp(self, config=None):
-        config = {'ttl': 30, 'scope': 'test', 'name': 'p-0', 'loop_wait': 10, 'retry_timeout': 10,
+        config = config or {}
-                  'kubernetes': {'labels': {'f': 'b'}, 'bypass_api_service': True, **(config or {})},
+        config.update(ttl=30, scope='test', name='p-0', loop_wait=10, group=0,
-                  'citus': {'group': 0, 'database': 'postgres'}}
+                      retry_timeout=10, labels={'f': 'b'}, bypass_api_service=True)
-        self.k = get_dcs(config)
+        self.k = Kubernetes(config)
-        self.assertIsInstance(self.k, Kubernetes)
+        self.k._citus_group = None
-        self.k._mpp = get_mpp({})
         self.assertRaises(AttributeError, self.k._pods._build_cache)
         self.k._pods._is_ready = True
         self.assertRaises(TypeError, self.k._kinds._build_cache)
@@ -259,31 +254,18 @@ class TestKubernetesConfigMaps(BaseTestKubernetes):
             self.assertRaises(KubernetesError, self.k.get_cluster)
 
     def test__get_citus_cluster(self):
-        self.k._mpp = get_mpp({'citus': {'group': 0, 'database': 'postgres'}})
+        self.k._citus_group = '0'
         cluster = self.k.get_cluster()
         self.assertIsInstance(cluster, Cluster)
         self.assertIsInstance(cluster.workers[1], Cluster)
 
-    @patch('patroni.dcs.kubernetes.logger.error')
-    def test_get_mpp_coordinator(self, mock_logger):
-        self.assertIsInstance(self.k.get_mpp_coordinator(), Cluster)
-        with patch.object(Kubernetes, '_postgresql_cluster_loader', Mock(side_effect=Exception)):
-            self.assertIsNone(self.k.get_mpp_coordinator())
-            mock_logger.assert_called()
-            self.assertEqual(mock_logger.call_args[0][0], 'Failed to load %s coordinator cluster from Kubernetes: %r')
-            self.assertEqual(mock_logger.call_args[0][1], 'Null')
-            self.assertIsInstance(mock_logger.call_args[0][2], KubernetesError)
-
     @patch('patroni.dcs.kubernetes.logger.error')
     def test_get_citus_coordinator(self, mock_logger):
-        self.k._mpp = get_mpp({'citus': {'group': 0, 'database': 'postgres'}})
+        self.assertIsInstance(self.k.get_citus_coordinator(), Cluster)
-        self.assertIsInstance(self.k.get_mpp_coordinator(), Cluster)
+        with patch.object(Kubernetes, '_cluster_loader', Mock(side_effect=Exception)):
-        with patch.object(Kubernetes, '_postgresql_cluster_loader', Mock(side_effect=Exception)):
+            self.assertIsNone(self.k.get_citus_coordinator())
-            self.assertIsNone(self.k.get_mpp_coordinator())
             mock_logger.assert_called()
-            self.assertEqual(mock_logger.call_args[0][0], 'Failed to load %s coordinator cluster from Kubernetes: %r')
+            self.assertTrue(mock_logger.call_args[0][0].startswith('Failed to load Citus coordinator'))
-            self.assertEqual(mock_logger.call_args[0][1], 'Citus')
-            self.assertIsInstance(mock_logger.call_args[0][2], KubernetesError)
 
     def test_attempt_to_acquire_leader(self):
         with patch.object(k8s_client.CoreV1Api, 'patch_namespaced_config_map', create=True) as mock_patch:
@@ -484,7 +466,7 @@ class TestCacheBuilder(BaseTestKubernetes):
     @patch('patroni.dcs.kubernetes.ObjectCache._watch', mock_watch)
     @patch.object(urllib3.HTTPResponse, 'read_chunked')
     def test__build_cache(self, mock_read_chunked):
-        self.k._mpp = get_mpp({'citus': {'group': 0, 'database': 'postgres'}})
+        self.k._citus_group = '0'
         mock_read_chunked.return_value = [json.dumps(
             {'type': 'MODIFIED', 'object': {'metadata': {
                 'name': self.k.config_path, 'resourceVersion': '2', 'annotations': {self.k._CONFIG: 'foo'}}}}

tests/test_log.py

@@ -3,23 +3,12 @@ import os
 import sys
 import unittest
 import yaml
-from io import StringIO
 
 from mock import Mock, patch
 from patroni.config import Config
 from patroni.log import PatroniLogger
 from queue import Queue, Full
 
-try:
-    from pythonjsonlogger import jsonlogger
-
-    jsonlogger.JsonFormatter(None, None, rename_fields={}, static_fields={})
-    json_formatter_is_available = True
-
-    import json  # we need json.loads() function
-except Exception:
-    json_formatter_is_available = False
-
 _LOG = logging.getLogger(__name__)
 
 
@@ -83,201 +72,3 @@ class TestPatroniLogger(unittest.TestCase):
         _LOG.info('blabla')
         logger.shutdown()
         self.assertEqual(logger.records_lost, 0)
-
-    def test_json_list_format(self):
-        config = {
-            'type': 'json',
-            'format': [
-                {'asctime': '@timestamp'},
-                {'levelname': 'level'},
-                'message'
-            ],
-            'static_fields': {
-                'app': 'patroni'
-            }
-        }
-
-        test_message = 'test json logging in case of list format'
-
-        with patch('sys.stderr', StringIO()) as stderr_output:
-            logger = PatroniLogger()
-            logger.reload_config(config)
-
-            _LOG.info(test_message)
-            if json_formatter_is_available:
-                target_log = json.loads(stderr_output.getvalue().split('\n')[-2])
-
-                self.assertIn('@timestamp', target_log)
-                self.assertEqual(target_log['message'], test_message)
-                self.assertEqual(target_log['level'], 'INFO')
-                self.assertEqual(target_log['app'], 'patroni')
-                self.assertEqual(len(target_log), len(config['format']) + len(config['static_fields']))
-
-    def test_json_str_format(self):
-        config = {
-            'type': 'json',
-            'format': '%(asctime)s %(levelname)s %(message)s',
-            'static_fields': {
-                'app': 'patroni'
-            }
-        }
-
-        test_message = 'test json logging in case of string format'
-
-        with patch('sys.stderr', StringIO()) as stderr_output:
-            logger = PatroniLogger()
-            logger.reload_config(config)
-
-            _LOG.info(test_message)
-            if json_formatter_is_available:
-                target_log = json.loads(stderr_output.getvalue().split('\n')[-2])
-
-                self.assertIn('asctime', target_log)
-                self.assertEqual(target_log['message'], test_message)
-                self.assertEqual(target_log['levelname'], 'INFO')
-                self.assertEqual(target_log['app'], 'patroni')
-
-    def test_plain_format(self):
-        config = {
-            'type': 'plain',
-            'format': '[%(asctime)s] %(levelname)s %(message)s',
-        }
-
-        test_message = 'test plain logging'
-
-        with patch('sys.stderr', StringIO()) as stderr_output:
-            logger = PatroniLogger()
-            logger.reload_config(config)
-
-            _LOG.info(test_message)
-            target_log = stderr_output.getvalue()
-
-        self.assertRegex(target_log, fr'^\[.*\] INFO {test_message}$')
-
-    def test_dateformat(self):
-        config = {
-            'format': '[%(asctime)s] %(message)s',
-            'dateformat': '%Y-%m-%dT%H:%M:%S'
-        }
-
-        test_message = 'test date format'
-
-        with patch('sys.stderr', StringIO()) as stderr_output:
-            logger = PatroniLogger()
-            logger.reload_config(config)
-
-            _LOG.info(test_message)
-            target_log = stderr_output.getvalue()
-
-        self.assertRegex(target_log, r'\[\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\]')
-
-    def test_invalid_dateformat(self):
-        config = {
-            'format': '[%(asctime)s] %(message)s',
-            'dateformat': 5
-        }
-
-        with self.assertLogs() as captured_log:
-            logger = PatroniLogger()
-            logger.reload_config(config)
-
-            captured_log_level = captured_log.records[0].levelname
-            captured_log_message = captured_log.records[0].message
-
-            self.assertEqual(captured_log_level, 'WARNING')
-            self.assertRegex(
-                captured_log_message,
-                fr'Expected log dateformat to be a string, but got "{type(config["dateformat"])}"'
-            )
-
-    def test_invalid_plain_format(self):
-        config = {
-            'type': 'plain',
-            'format': ['message']
-        }
-
-        with self.assertLogs() as captured_log:
-            logger = PatroniLogger()
-            logger.reload_config(config)
-
-            captured_log_level = captured_log.records[0].levelname
-            captured_log_message = captured_log.records[0].message
-
-            self.assertEqual(captured_log_level, 'WARNING')
-            self.assertRegex(
-                captured_log_message,
-                r'Expected log format to be a string when log type is plain, but got ".*"'
-            )
-
-    def test_invalid_json_format(self):
-        config = {
-            'type': 'json',
-            'format': {
-                'asctime': 'timestamp',
-                'message': 'message'
-            }
-        }
-
-        with self.assertLogs() as captured_log:
-            logger = PatroniLogger()
-            logger.reload_config(config)
-
-            captured_log_level = captured_log.records[0].levelname
-            captured_log_message = captured_log.records[0].message
-
-            self.assertEqual(captured_log_level, 'WARNING')
-            self.assertRegex(captured_log_message, r'Expected log format to be a string or a list, but got ".*"')
-
-        with self.assertLogs() as captured_log:
-            config['format'] = [['levelname']]
-            logger.reload_config(config)
-
-            captured_log_level = captured_log.records[0].levelname
-            captured_log_message = captured_log.records[0].message
-
-            self.assertEqual(captured_log_level, 'WARNING')
-            self.assertRegex(
-                captured_log_message,
-                r'Expected each item of log format to be a string or dictionary, but got ".*"'
-            )
-
-        with self.assertLogs() as captured_log:
-            config['format'] = ['message', {'asctime': ['timestamp']}]
-            logger.reload_config(config)
-
-            captured_log_level = captured_log.records[0].levelname
-            captured_log_message = captured_log.records[0].message
-
-            self.assertEqual(captured_log_level, 'WARNING')
-            self.assertRegex(captured_log_message, r'Expected renamed log field to be a string, but got ".*"')
-
-    def test_fail_to_use_python_json_logger(self):
-        with self.assertLogs() as captured_log:
-            logger = PatroniLogger()
-            with patch('builtins.__import__', Mock(side_effect=ImportError)):
-                logger.reload_config({'type': 'json'})
-
-            captured_log_level = captured_log.records[0].levelname
-            captured_log_message = captured_log.records[0].message
-
-            self.assertEqual(captured_log_level, 'ERROR')
-            self.assertRegex(
-                captured_log_message,
-                r'Failed to import "python-json-logger" library: .*. Falling back to the plain logger'
-            )
-
-        with self.assertLogs() as captured_log:
-            logger = PatroniLogger()
-            pythonjsonlogger = Mock()
-            pythonjsonlogger.jsonlogger.JsonFormatter = Mock(side_effect=Exception)
-            with patch('builtins.__import__', Mock(return_value=pythonjsonlogger)):
-                logger.reload_config({'type': 'json'})
-
-            captured_log_level = captured_log.records[0].levelname
-            captured_log_message = captured_log.records[0].message
-
-            self.assertEqual(captured_log_level, 'ERROR')
-            self.assertRegex(
-                captured_log_message,
-                r'Failed to initialize JsonFormatter: .*. Falling back to the plain logger'
-            )

tests/test_mpp.py

@@ -1,52 +0,0 @@
-from typing import Any
-from patroni.exceptions import PatroniException
-from patroni.postgresql.mpp import AbstractMPP, get_mpp, Null
-
-from . import BaseTestPostgresql
-from .test_ha import get_cluster_initialized_with_leader
-
-
-class TestMPP(BaseTestPostgresql):
-
-    def setUp(self):
-        super(TestMPP, self).setUp()
-        self.cluster = get_cluster_initialized_with_leader()
-
-    def test_get_handler_impl_exception(self):
-        class DummyMPP(AbstractMPP):
-            def __init__(self) -> None:
-                super().__init__({})
-
-            @staticmethod
-            def validate_config(config: Any) -> bool:
-                return True
-
-            @property
-            def group(self) -> None:
-                return None
-
-            @property
-            def coordinator_group_id(self) -> None:
-                return None
-
-            @property
-            def type(self) -> str:
-                return "dummy"
-
-        mpp = DummyMPP()
-        self.assertRaises(PatroniException, mpp.get_handler_impl, self.p)
-
-    def test_null_handler(self):
-        config = {}
-        mpp = get_mpp(config)
-        self.assertIsInstance(mpp, Null)
-        self.assertIsNone(mpp.group)
-        self.assertTrue(mpp.validate_config(config))
-        nullHandler = mpp.get_handler_impl(self.p)
-        self.assertIsNone(nullHandler.handle_event(self.cluster, {}))
-        self.assertIsNone(nullHandler.sync_meta_data(self.cluster))
-        self.assertIsNone(nullHandler.on_demote())
-        self.assertIsNone(nullHandler.schedule_cache_rebuild())
-        self.assertIsNone(nullHandler.bootstrap())
-        self.assertIsNone(nullHandler.adjust_postgres_gucs({}))
-        self.assertFalse(nullHandler.ignore_replication_slot({}))

tests/test_patroni.py

@@ -154,7 +154,6 @@ class TestPatroni(unittest.TestCase):
         self.p.api.start = Mock()
         self.p.logger.start = Mock()
         self.p.config._dynamic_configuration = {}
-        self.assertRaises(SleepException, self.p.run)
         with patch('patroni.dcs.Cluster.is_unlocked', Mock(return_value=True)):
             self.assertRaises(SleepException, self.p.run)
         with patch('patroni.config.Config.reload_local_configuration', Mock(return_value=False)):
@@ -175,20 +174,6 @@ class TestPatroni(unittest.TestCase):
         self.p.next_run = time.time() - self.p.dcs.loop_wait - 1
         self.p.schedule_next_run()
 
-    def test__filter_tags(self):
-        tags = {'noloadbalance': False, 'clonefrom': False, 'nosync': False, 'smth': 'random'}
-        self.assertEqual(self.p._filter_tags(tags), {'smth': 'random'})
-
-        tags['clonefrom'] = True
-        tags['smth'] = False
-        self.assertEqual(self.p._filter_tags(tags), {'clonefrom': True, 'smth': False})
-
-        tags = {'nofailover': False, 'failover_priority': 0}
-        self.assertEqual(self.p._filter_tags(tags), tags)
-
-        tags = {'nofailover': True, 'failover_priority': 1}
-        self.assertEqual(self.p._filter_tags(tags), tags)
-
     def test_noloadbalance(self):
         self.p.tags['noloadbalance'] = True
         self.assertTrue(self.p.noloadbalance)
@@ -200,11 +185,9 @@ class TestPatroni(unittest.TestCase):
             # Setting `nofailover: True` has precedence
             (True, 0, True),
             (True, 1, True),
-            ('False', 1, True),  # because we use bool() for the value
             # Similarly, setting `nofailover: False` has precedence
             (False, 0, False),
             (False, 1, False),
-            ('', 0, False),
             # Only when we have `nofailover: None` should we got based on priority
             (None, 0, True),
             (None, 1, False),

tests/test_postgresql.py

@@ -5,20 +5,18 @@ import re
 import subprocess
 import time
 
-from copy import deepcopy
 from mock import Mock, MagicMock, PropertyMock, patch, mock_open
 
 import patroni.psycopg as psycopg
 
-from patroni import global_config
 from patroni.async_executor import CriticalTask
-from patroni.collections import CaseInsensitiveDict, CaseInsensitiveSet
+from patroni.collections import CaseInsensitiveSet
+from patroni.config import GlobalConfig
 from patroni.dcs import RemoteMember
 from patroni.exceptions import PostgresConnectionException, PatroniException
 from patroni.postgresql import Postgresql, STATE_REJECT, STATE_NO_RESPONSE
 from patroni.postgresql.bootstrap import Bootstrap
 from patroni.postgresql.callback_executor import CallbackAction
-from patroni.postgresql.config import get_param_diff, _false_validator
 from patroni.postgresql.postmaster import PostmasterProcess
 from patroni.postgresql.validator import (ValidatorFactoryNoType, ValidatorFactoryInvalidType,
                                           ValidatorFactoryInvalidSpec, ValidatorFactory, InvalidGucValidatorsFile,
@@ -27,8 +25,7 @@ from patroni.postgresql.validator import (ValidatorFactoryNoType, ValidatorFacto
 from patroni.utils import RetryFailedError
 from threading import Thread, current_thread
 
-from . import (BaseTestPostgresql, MockCursor, MockPostmaster, psycopg_connect, mock_available_gucs,
+from . import BaseTestPostgresql, MockCursor, MockPostmaster, psycopg_connect, mock_available_gucs
-               GET_PG_SETTINGS_RESULT)
 
 
 mtime_ret = {}
@@ -562,142 +559,31 @@ class TestPostgresql(BaseTestPostgresql):
 
     @patch('time.sleep', Mock())
     @patch.object(Postgresql, 'is_running', Mock(return_value=True))
-    @patch('patroni.postgresql.config.logger.info')
+    def test_reload_config(self):
-    @patch('patroni.postgresql.config.logger.warning')
+        parameters = self._PARAMETERS.copy()
-    def test_reload_config(self, mock_warning, mock_info):
+        parameters.pop('f.oo')
-        config = deepcopy(self.p.config._config)
+        parameters['wal_buffers'] = '512'
-
+        config = {'pg_hba': [''], 'pg_ident': [''], 'use_unix_socket': True, 'use_unix_socket_repl': True,
-        # Nothing changed
+                  'authentication': {},
+                  'retry_timeout': 10, 'listen': '*', 'krbsrvname': 'postgres', 'parameters': parameters}
         self.p.reload_config(config)
-        mock_info.assert_called_once_with('No PostgreSQL configuration items changed, nothing to reload.')
+        parameters['b.ar'] = 'bar'
-        mock_warning.assert_not_called()
+        with patch.object(MockCursor, 'fetchall',
-        self.assertEqual(self.p.pending_restart_reason, CaseInsensitiveDict())
+                          Mock(side_effect=[[('wal_block_size', '8191', None, 'integer', 'internal'),
-
+                                             ('wal_segment_size', '2048', '8kB', 'integer', 'internal'),
-        mock_info.reset_mock()
+                                             ('shared_buffers', '16384', '8kB', 'integer', 'postmaster'),
-
+                                             ('wal_buffers', '-1', '8kB', 'integer', 'postmaster'),
-        # Ignored params changed
+                                             ('port', '5433', None, 'integer', 'postmaster')], Exception])):
-        config['parameters']['archive_cleanup_command'] = 'blabla'
-        self.p.reload_config(config)
-        mock_info.assert_called_once_with('No PostgreSQL configuration items changed, nothing to reload.')
-        self.assertEqual(self.p.pending_restart_reason, CaseInsensitiveDict())
-
-        mock_info.reset_mock()
-
-        # Handle wal_buffers
-        self.p.config._config['parameters']['wal_buffers'] = '512'
-        self.p.reload_config(config)
-        mock_info.assert_called_once_with('No PostgreSQL configuration items changed, nothing to reload.')
-        self.assertEqual(self.p.pending_restart_reason, CaseInsensitiveDict())
-
-        mock_info.reset_mock()
-        config = deepcopy(self.p.config._config)
-
-        # hba/ident_changed
-        config['pg_hba'] = ['']
-        config['pg_ident'] = ['']
-        self.p.reload_config(config)
-        mock_info.assert_called_once_with('Reloading PostgreSQL configuration.')
-        self.assertEqual(self.p.pending_restart_reason, CaseInsensitiveDict())
-
-        mock_info.reset_mock()
-
-        # Postmaster parameter change (pending_restart)
-        init_max_worker_processes = config['parameters']['max_worker_processes']
-        config['parameters']['max_worker_processes'] *= 2
-        new_max_worker_processes = config['parameters']['max_worker_processes']
-        # stale reason to be removed
-        self.p._pending_restart_reason = CaseInsensitiveDict({'max_connections': get_param_diff('200', '100')})
-
-        with patch.object(Postgresql, 'get_guc_value', Mock(return_value=str(new_max_worker_processes))), \
-             patch('patroni.postgresql.Postgresql._query', Mock(side_effect=[
-                 GET_PG_SETTINGS_RESULT, [('max_worker_processes', str(init_max_worker_processes), None, 'integer')]])):
             self.p.reload_config(config)
-            self.assertEqual(mock_info.call_args_list[0][0],
+        parameters['autovacuum'] = 'on'
-                             ("Changed %s from '%s' to '%s' (restart might be required)", 'max_worker_processes',
-                              str(init_max_worker_processes), config['parameters']['max_worker_processes']))
-            self.assertEqual(mock_info.call_args_list[1][0], ('Reloading PostgreSQL configuration.',))
-            self.assertEqual(self.p.pending_restart_reason,
-                             CaseInsensitiveDict({'max_worker_processes': get_param_diff(init_max_worker_processes,
-                                                                                         new_max_worker_processes)}))
-
-        mock_info.reset_mock()
-
-        # Reset to the initial value without restart
-        config['parameters']['max_worker_processes'] = init_max_worker_processes
         self.p.reload_config(config)
-        self.assertEqual(mock_info.call_args_list[0][0], ("Changed %s from '%s' to '%s'", 'max_worker_processes',
+        parameters['autovacuum'] = 'off'
-                                                          init_max_worker_processes * 2,
+        parameters.pop('search_path')
-                                                          config['parameters']['max_worker_processes']))
+        config['listen'] = '*:5433'
-        self.assertEqual(mock_info.call_args_list[1][0], ('Reloading PostgreSQL configuration.',))
-        self.assertEqual(self.p.pending_restart_reason, CaseInsensitiveDict())
-
-        mock_info.reset_mock()
-
-        # User-defined parameter changed (removed)
-        config['parameters'].pop('f.oo')
         self.p.reload_config(config)
-        self.assertEqual(mock_info.call_args_list[0][0], ("Changed %s from '%s' to '%s'", 'f.oo', 'bar', None))
+        parameters['unix_socket_directories'] = '.'
-        self.assertEqual(mock_info.call_args_list[1][0], ('Reloading PostgreSQL configuration.',))
-        self.assertEqual(self.p.pending_restart_reason, CaseInsensitiveDict())
-
-        mock_info.reset_mock()
-
-        # Non-postmaster parameter change
-        config['parameters']['vacuum_cost_delay'] = 2.5
         self.p.reload_config(config)
-        self.assertEqual(mock_info.call_args_list[0][0],
+        self.p.config.resolve_connection_addresses()
-                         ("Changed %s from '%s' to '%s'", 'vacuum_cost_delay', '200ms', 2.5))
-        self.assertEqual(mock_info.call_args_list[1][0], ('Reloading PostgreSQL configuration.',))
-        self.assertEqual(self.p.pending_restart_reason, CaseInsensitiveDict())
-
-        config['parameters']['vacuum_cost_delay'] = 200
-        mock_info.reset_mock()
-
-        # Remove invalid parameter
-        config['parameters']['invalid'] = 'value'
-        self.p.reload_config(config)
-        self.assertEqual(mock_warning.call_args_list[0][0],
-                         ('Removing invalid parameter `%s` from postgresql.parameters', 'invalid'))
-        config['parameters'].pop('invalid')
-
-        mock_warning.reset_mock()
-        mock_info.reset_mock()
-
-        # Non-empty result (outside changes)
-        with patch.object(Postgresql, 'get_guc_value', Mock(side_effect=['73', None, ''])), \
-             patch('patroni.postgresql.Postgresql._query',
-                   Mock(side_effect=[GET_PG_SETTINGS_RESULT, [('shared_buffers', '128MB', '8kB', 'integer')]] * 3)):
-            # pg_settings shared_buffers (current value) == 128MB (16384)
-            # Patroni config shared_buffers == 42MB (should not end up in the restart reason diff)
-            # get_guc_value (will be used after restart) == 73 (584kB)
-            config['parameters']['shared_buffers'] = '42MB'
-            self.p.reload_config(config, True)
-            self.assertEqual(mock_info.call_args_list[0][0],
-                             ("Changed %s from '%s' to '%s' (restart might be required)",
-                              'shared_buffers', '128MB', '42MB'))
-            self.assertEqual(mock_info.call_args_list[1][0], ('Reloading PostgreSQL configuration.',))
-            self.assertEqual(mock_info.call_args_list[2][0], ("PostgreSQL configuration parameters requiring restart"
-                                                              " (%s) seem to be changed bypassing Patroni config."
-                                                              " Setting 'Pending restart' flag", 'shared_buffers'))
-            self.assertEqual(self.p.pending_restart_reason,
-                             CaseInsensitiveDict({'shared_buffers': get_param_diff('128MB', '584kB')}))
-
-            self.p.reload_config(config, True)
-            self.assertEqual(self.p.pending_restart_reason,
-                             CaseInsensitiveDict({'shared_buffers': get_param_diff('128MB', '?')}))
-
-            self.p.reload_config(config, True)
-            self.assertEqual(self.p.pending_restart_reason,
-                             CaseInsensitiveDict({'shared_buffers': get_param_diff('128MB', '')}))
-
-        # Exception while querying pending_restart parameters
-        with patch('patroni.postgresql.Postgresql._query', Mock(side_effect=[GET_PG_SETTINGS_RESULT, Exception])):
-            # Invalid values, just to increase silly coverage in postgresql.validator.
-            # One day we will have proper tests there.
-            config['parameters']['autovacuum'] = 'of'  # Bool.transform()
-            config['parameters']['vacuum_cost_limit'] = 'smth'  # Number.transform()
-            self.p.reload_config(config, True)
-            self.assertEqual(mock_warning.call_args_list[-1][0][0], 'Exception %r when running query')
 
     def test_resolve_connection_addresses(self):
         self.p.config._config['use_unix_socket'] = self.p.config._config['use_unix_socket_repl'] = True
@@ -806,12 +692,12 @@ class TestPostgresql(BaseTestPostgresql):
 
     def test_get_server_parameters(self):
         config = {'parameters': {'wal_level': 'hot_standby', 'max_prepared_transactions': 100}, 'listen': '0'}
-        with patch.object(global_config.__class__, 'is_synchronous_mode', PropertyMock(return_value=True)):
+        self.p._global_config = GlobalConfig({'synchronous_mode': True})
-            self.p.config.get_server_parameters(config)
+        self.p.config.get_server_parameters(config)
-            with patch.object(global_config.__class__, 'is_synchronous_mode_strict', PropertyMock(return_value=True)):
+        self.p._global_config = GlobalConfig({'synchronous_mode': True, 'synchronous_mode_strict': True})
-                self.p.config.get_server_parameters(config)
+        self.p.config.get_server_parameters(config)
-                self.p.config.set_synchronous_standby_names('foo')
+        self.p.config.set_synchronous_standby_names('foo')
-                self.assertTrue(str(self.p.config.get_server_parameters(config)).startswith('<CaseInsensitiveDict'))
+        self.assertTrue(str(self.p.config.get_server_parameters(config)).startswith('<CaseInsensitiveDict'))
 
     @patch('time.sleep', Mock())
     def test__wait_for_connection_close(self):
@@ -840,36 +726,22 @@ class TestPostgresql(BaseTestPostgresql):
     @patch.object(Postgresql, 'get_postgres_role_from_data_directory', Mock(return_value='replica'))
     @patch.object(Postgresql, 'is_running', Mock(return_value=False))
     @patch.object(Bootstrap, 'running_custom_bootstrap', PropertyMock(return_value=True))
-    @patch('patroni.postgresql.config.logger')
+    @patch.object(Postgresql, 'controldata', Mock(return_value={'max_connections setting': '200',
+                                                                'max_worker_processes setting': '20',
+                                                                'max_locks_per_xact setting': '100',
+                                                                'max_wal_senders setting': 10}))
+    @patch('patroni.postgresql.config.logger.warning')
     def test_effective_configuration(self, mock_logger):
-        controldata = {'max_connections setting': '100', 'max_worker_processes setting': '8',
+        self.p.cancellable.cancel()
-                       'max_locks_per_xact setting': '64', 'max_wal_senders setting': 5}
+        self.p.config.write_recovery_conf({'pause_at_recovery_target': 'false'})
+        self.assertFalse(self.p.start())
+        mock_logger.assert_called_once()
+        self.assertTrue('is missing from pg_controldata output' in mock_logger.call_args[0][0])
 
-        with patch.object(Postgresql, 'controldata', Mock(return_value=controldata)), \
+        self.assertTrue(self.p.pending_restart)
-             patch.object(Bootstrap, 'keep_existing_recovery_conf', PropertyMock(return_value=True)):
+        with patch.object(Bootstrap, 'keep_existing_recovery_conf', PropertyMock(return_value=True)):
-            self.p.cancellable.cancel()
             self.assertFalse(self.p.start())
-            self.assertEqual(self.p.pending_restart_reason, CaseInsensitiveDict())
+            self.assertTrue(self.p.pending_restart)
-            mock_logger.warning.assert_called_once()
-            self.assertEqual(mock_logger.warning.call_args[0],
-                             ('%s is missing from pg_controldata output', 'max_prepared_xacts setting'))
-
-        mock_logger.reset_mock()
-        controldata['max_prepared_xacts setting'] = 0
-        controldata['max_wal_senders setting'] *= 2
-
-        with patch.object(Postgresql, 'controldata', Mock(return_value=controldata)):
-            self.p.config.write_recovery_conf({'pause_at_recovery_target': 'false'})
-            self.assertFalse(self.p.start())
-            mock_logger.warning.assert_not_called()
-            self.assertEqual(self.p.pending_restart_reason, CaseInsensitiveDict({
-                'max_wal_senders': get_param_diff('10', '5')
-            }))
-            mock_logger.info.assert_called_once()
-            self.assertEqual(mock_logger.info.call_args[0],
-                             ("%s value in pg_controldata: %d, in the global configuration: %d."
-                              " pg_controldata value will be used. Setting 'Pending restart' flag",
-                              'max_wal_senders', 10, 5))
 
     @patch('os.path.exists', Mock(return_value=True))
     @patch('os.path.isfile', Mock(return_value=False))
@@ -1112,14 +984,3 @@ class TestPostgresql2(BaseTestPostgresql):
         self.assertIn('diff(pg_catalog.pg_current_xlog_flush_location(', self.p.cluster_info_query)
         self.p._major_version = 90500
         self.assertIn('diff(pg_catalog.pg_current_xlog_location(', self.p.cluster_info_query)
-
-    @patch.object(Postgresql, 'is_primary', Mock(return_value=False))
-    @patch.object(Postgresql, '_query', Mock(return_value=[('primary_conninfo', 'host=a port=5433 passfile=/blabla')]))
-    def test_load_current_server_parameters(self):
-        keep_values = {name: self.p.config._server_parameters[name]
-                       for name, value in self.p.config.CMDLINE_OPTIONS.items() if value[1] == _false_validator}
-        self.p.config.load_current_server_parameters()
-        self.assertTrue(all(self.p.config._server_parameters[name] == value for name, value in keep_values.items()))
-        self.assertEqual(dict(self.p.config._recovery_params),
-                         {'primary_conninfo': {'host': 'a', 'port': '5433', 'passfile': '/blabla',
-                          'gssencmode': 'prefer', 'sslmode': 'prefer', 'channel_binding': 'prefer'}})

tests/test_raft.py

@@ -4,10 +4,8 @@ import tempfile
 import time
 
 from mock import Mock, PropertyMock, patch
-from patroni.dcs import get_dcs
 from patroni.dcs.raft import Cluster, DynMemberSyncObj, KVStoreTTL, \
     Raft, RaftError, SyncObjUtility, TCPTransport, _TCPTransport
-from patroni.postgresql.mpp import get_mpp
 from pysyncobj import SyncObjConf, FAIL_REASON
 
 
@@ -130,10 +128,9 @@ class TestRaft(unittest.TestCase):
     _TMP = tempfile.gettempdir()
 
     def test_raft(self):
-        raft = get_dcs({'ttl': 30, 'scope': 'test', 'name': 'pg', 'retry_timeout': 10,
+        raft = Raft({'ttl': 30, 'scope': 'test', 'name': 'pg', 'self_addr': '127.0.0.1:1234',
-                        'raft': {'self_addr': '127.0.0.1:1234', 'data_dir': self._TMP},
+                     'retry_timeout': 10, 'data_dir': self._TMP,
-                        'citus': {'group': 0, 'database': 'postgres'}})
+                     'database': 'citus', 'group': 0})
-        self.assertIsInstance(raft, Raft)
         raft.reload_config({'retry_timeout': 20, 'ttl': 60, 'loop_wait': 10})
         self.assertTrue(raft._sync_obj.set(raft.members_path + 'legacy', '{"version":"2.0.0"}'))
         self.assertTrue(raft.touch_member(''))
@@ -142,9 +139,9 @@ class TestRaft(unittest.TestCase):
         self.assertTrue(raft.set_config_value('{}'))
         self.assertTrue(raft.write_sync_state('foo', 'bar'))
         self.assertFalse(raft.write_sync_state('foo', 'bar', 1))
-        raft._mpp = get_mpp({'citus': {'group': 1, 'database': 'postgres'}})
+        raft._citus_group = '1'
         self.assertTrue(raft.manual_failover('foo', 'bar'))
-        raft._mpp = get_mpp({'citus': {'group': 0, 'database': 'postgres'}})
+        raft._citus_group = '0'
         self.assertTrue(raft.take_leader())
         cluster = raft.get_cluster()
         self.assertIsInstance(cluster, Cluster)
@@ -156,13 +153,13 @@ class TestRaft(unittest.TestCase):
         self.assertTrue(raft.update_leader(leader, '1', failsafe={'foo': 'bat'}))
         self.assertTrue(raft._sync_obj.set(raft.failsafe_path, '{"foo"}'))
         self.assertTrue(raft._sync_obj.set(raft.status_path, '{'))
-        raft.get_mpp_coordinator()
+        raft.get_citus_coordinator()
         self.assertTrue(raft.delete_sync_state())
         self.assertTrue(raft.set_history_value(''))
         self.assertTrue(raft.delete_cluster())
-        raft._mpp = get_mpp({'citus': {'group': 1, 'database': 'postgres'}})
+        raft._citus_group = '1'
         self.assertTrue(raft.delete_cluster())
-        raft._mpp = get_mpp({})
+        raft._citus_group = None
         raft.get_cluster()
         raft.watch(None, 0.001)
         raft._sync_obj.destroy()
@@ -178,5 +175,5 @@ class TestRaft(unittest.TestCase):
     def test_init(self, mock_event, mock_kvstore):
         mock_kvstore.return_value.applied_local_log = False
         mock_event.return_value.is_set.side_effect = [False, True]
-        self.assertIsInstance(get_dcs({'ttl': 30, 'scope': 'test', 'name': 'pg', 'patronictl': True,
+        self.assertIsNotNone(Raft({'ttl': 30, 'scope': 'test', 'name': 'pg', 'patronictl': True,
-                                       'raft': {'self_addr': '1', 'data_dir': self._TMP}}), Raft)
+                                   'self_addr': '1', 'data_dir': self._TMP}))

tests/test_slots.py

@@ -6,23 +6,16 @@ import unittest
 from mock import Mock, PropertyMock, patch
 from threading import Thread
 
-from patroni import global_config, psycopg
+from patroni import psycopg
+from patroni.config import GlobalConfig
 from patroni.dcs import Cluster, ClusterConfig, Member, Status, SyncState
 from patroni.postgresql import Postgresql
 from patroni.postgresql.misc import fsync_dir
 from patroni.postgresql.slots import SlotsAdvanceThread, SlotsHandler
-from patroni.tags import Tags
 
 from . import BaseTestPostgresql, psycopg_connect, MockCursor
 
 
-class TestTags(Tags):
-
-    @property
-    def tags(self):
-        return {}
-
-
 @patch('subprocess.call', Mock(return_value=0))
 @patch('patroni.psycopg.connect', psycopg_connect)
 @patch.object(Thread, 'start', Mock())
@@ -36,13 +29,12 @@ class TestSlotsHandler(BaseTestPostgresql):
     @patch.object(Postgresql, 'is_running', Mock(return_value=True))
     def setUp(self):
         super(TestSlotsHandler, self).setUp()
+        self.p._global_config = GlobalConfig({})
         self.s = self.p.slots_handler
         self.p.start()
         config = ClusterConfig(1, {'slots': {'ls': {'database': 'a', 'plugin': 'b'}, 'ls2': None}}, 1)
         self.cluster = Cluster(True, config, self.leader, Status(0, {'ls': 12345, 'ls2': 12345}),
                                [self.me, self.other, self.leadermem], None, SyncState.empty(), None, None)
-        global_config.update(self.cluster)
-        self.tags = TestTags()
 
     def test_sync_replication_slots(self):
         config = ClusterConfig(1, {'slots': {'test_3': {'database': 'a', 'plugin': 'b'},
@@ -50,38 +42,36 @@ class TestSlotsHandler(BaseTestPostgresql):
                                    'ignore_slots': [{'name': 'blabla'}]}, 1)
         cluster = Cluster(True, config, self.leader, Status(0, {'test_3': 10}),
                           [self.me, self.other, self.leadermem], None, SyncState.empty(), None, None)
-        global_config.update(cluster)
         with mock.patch('patroni.postgresql.Postgresql._query', Mock(side_effect=psycopg.OperationalError)):
-            self.s.sync_replication_slots(cluster, self.tags)
+            self.s.sync_replication_slots(cluster, False)
         self.p.set_role('standby_leader')
         with patch.object(SlotsHandler, 'drop_replication_slot', Mock(return_value=(True, False))), \
-                patch.object(global_config.__class__, 'is_standby_cluster', PropertyMock(return_value=True)), \
+                patch.object(GlobalConfig, 'is_standby_cluster', PropertyMock(return_value=True)), \
                 patch('patroni.postgresql.slots.logger.debug') as mock_debug:
-            self.s.sync_replication_slots(cluster, self.tags)
+            self.s.sync_replication_slots(cluster, False)
             mock_debug.assert_called_once()
         self.p.set_role('replica')
         with patch.object(Postgresql, 'is_primary', Mock(return_value=False)), \
-                patch.object(global_config.__class__, 'is_paused', PropertyMock(return_value=True)), \
                 patch.object(SlotsHandler, 'drop_replication_slot') as mock_drop:
             config.data['slots'].pop('ls')
-            self.s.sync_replication_slots(cluster, self.tags)
+            self.s.sync_replication_slots(cluster, False, paused=True)
             mock_drop.assert_not_called()
         self.p.set_role('primary')
         with mock.patch('patroni.postgresql.Postgresql.role', new_callable=PropertyMock(return_value='replica')):
-            self.s.sync_replication_slots(cluster, self.tags)
+            self.s.sync_replication_slots(cluster, False)
         with patch('patroni.dcs.logger.error', new_callable=Mock()) as errorlog_mock:
             alias1 = Member(0, 'test-3', 28, {'conn_url': 'postgres://replicator:[email protected]:5436/postgres'})
             alias2 = Member(0, 'test.3', 28, {'conn_url': 'postgres://replicator:[email protected]:5436/postgres'})
             cluster.members.extend([alias1, alias2])
-            self.s.sync_replication_slots(cluster, self.tags)
+            self.s.sync_replication_slots(cluster, False)
             self.assertEqual(errorlog_mock.call_count, 5)
             ca = errorlog_mock.call_args_list[0][0][1]
             self.assertTrue("test-3" in ca, "non matching {0}".format(ca))
             self.assertTrue("test.3" in ca, "non matching {0}".format(ca))
             with patch.object(Postgresql, 'major_version', PropertyMock(return_value=90618)):
-                self.s.sync_replication_slots(cluster, self.tags)
+                self.s.sync_replication_slots(cluster, False)
                 self.p.set_role('replica')
-                self.s.sync_replication_slots(cluster, self.tags)
+                self.s.sync_replication_slots(cluster, False)
 
     def test_cascading_replica_sync_replication_slots(self):
         """Test sync with a cascading replica so physical slots are present on a replica."""
@@ -96,7 +86,7 @@ class TestSlotsHandler(BaseTestPostgresql):
         with patch.object(Postgresql, '_query') as mock_query, \
                 patch.object(Postgresql, 'is_primary', Mock(return_value=False)):
             mock_query.return_value = [('ls', 'logical', 104, 'b', 'a', 5, 12345, 105)]
-            ret = self.s.sync_replication_slots(cluster, self.tags)
+            ret = self.s.sync_replication_slots(cluster, False)
         self.assertEqual(ret, [])
 
     def test_process_permanent_slots(self):
@@ -104,9 +94,8 @@ class TestSlotsHandler(BaseTestPostgresql):
                                    'ignore_slots': [{'name': 'blabla'}]}, 1)
         cluster = Cluster(True, config, self.leader, Status.empty(), [self.me, self.other, self.leadermem],
                           None, SyncState.empty(), None, None)
-        global_config.update(cluster)
 
-        self.s.sync_replication_slots(cluster, self.tags)
+        self.s.sync_replication_slots(cluster, False)
         with patch.object(Postgresql, '_query') as mock_query:
             self.p.reset_cluster_info_state(None)
             mock_query.return_value = [(
@@ -129,48 +118,48 @@ class TestSlotsHandler(BaseTestPostgresql):
         self.p.set_role('replica')
         self.cluster.slots['ls'] = 12346
         with patch.object(SlotsHandler, 'check_logical_slots_readiness', Mock(return_value=False)):
-            self.assertEqual(self.s.sync_replication_slots(self.cluster, self.tags), [])
+            self.assertEqual(self.s.sync_replication_slots(self.cluster, False), [])
         with patch.object(SlotsHandler, '_query', Mock(return_value=[('ls', 'logical', 499, 'b', 'a', 5, 100, 500)])), \
                 patch.object(MockCursor, 'execute', Mock(side_effect=psycopg.OperationalError)), \
                 patch.object(SlotsAdvanceThread, 'schedule', Mock(return_value=(True, ['ls']))), \
                 patch.object(psycopg.OperationalError, 'diag') as mock_diag:
             type(mock_diag).sqlstate = PropertyMock(return_value='58P01')
-            self.assertEqual(self.s.sync_replication_slots(self.cluster, self.tags), ['ls'])
+            self.assertEqual(self.s.sync_replication_slots(self.cluster, False), ['ls'])
         self.cluster.slots['ls'] = 'a'
-        self.assertEqual(self.s.sync_replication_slots(self.cluster, self.tags), [])
+        self.assertEqual(self.s.sync_replication_slots(self.cluster, False), [])
         self.cluster.config.data['slots']['ls']['database'] = 'b'
         self.cluster.slots['ls'] = '500'
         with patch.object(MockCursor, 'rowcount', PropertyMock(return_value=1), create=True):
-            self.assertEqual(self.s.sync_replication_slots(self.cluster, self.tags), ['ls'])
+            self.assertEqual(self.s.sync_replication_slots(self.cluster, False), ['ls'])
 
     def test_copy_logical_slots(self):
         self.cluster.config.data['slots']['ls']['database'] = 'b'
-        self.s.copy_logical_slots(self.cluster, self.tags, ['ls'])
+        self.s.copy_logical_slots(self.cluster, ['ls'])
         with patch.object(MockCursor, 'execute', Mock(side_effect=psycopg.OperationalError)):
-            self.s.copy_logical_slots(self.cluster, self.tags, ['foo'])
+            self.s.copy_logical_slots(self.cluster, ['foo'])
         with patch.object(Cluster, 'leader', PropertyMock(return_value=None)):
-            self.s.copy_logical_slots(self.cluster, self.tags, ['foo'])
+            self.s.copy_logical_slots(self.cluster, ['foo'])
 
     @patch.object(Postgresql, 'stop', Mock(return_value=True))
     @patch.object(Postgresql, 'start', Mock(return_value=True))
     @patch.object(Postgresql, 'is_primary', Mock(return_value=False))
     def test_check_logical_slots_readiness(self):
-        self.s.copy_logical_slots(self.cluster, self.tags, ['ls'])
+        self.s.copy_logical_slots(self.cluster, ['ls'])
         with patch.object(MockCursor, '__iter__', Mock(return_value=iter([('postgresql0', None)]))), \
                 patch.object(MockCursor, 'fetchall', Mock(side_effect=Exception)):
-            self.assertFalse(self.s.check_logical_slots_readiness(self.cluster, self.tags))
+            self.assertFalse(self.s.check_logical_slots_readiness(self.cluster, None))
         with patch.object(MockCursor, '__iter__', Mock(return_value=iter([('postgresql0', None)]))), \
                 patch.object(MockCursor, 'fetchall', Mock(return_value=[(False,)])):
-            self.assertFalse(self.s.check_logical_slots_readiness(self.cluster, self.tags))
+            self.assertFalse(self.s.check_logical_slots_readiness(self.cluster, None))
         with patch.object(MockCursor, '__iter__', Mock(return_value=iter([('ls', 100)]))):
-            self.s.check_logical_slots_readiness(self.cluster, self.tags)
+            self.s.check_logical_slots_readiness(self.cluster, None)
 
     @patch.object(Postgresql, 'stop', Mock(return_value=True))
     @patch.object(Postgresql, 'start', Mock(return_value=True))
     @patch.object(Postgresql, 'is_primary', Mock(return_value=False))
     def test_on_promote(self):
         self.s.schedule_advance_slots({'foo': {'bar': 100}})
-        self.s.copy_logical_slots(self.cluster, self.tags, ['ls'])
+        self.s.copy_logical_slots(self.cluster, ['ls'])
         self.s.on_promote()
 
     @unittest.skipIf(os.name == 'nt', "Windows not supported")
@@ -200,12 +189,11 @@ class TestSlotsHandler(BaseTestPostgresql):
         config = ClusterConfig(1, {'slots': {'blabla': {'type': 'physical'}, 'leader': None}}, 1)
         cluster = Cluster(True, config, self.leader, Status(0, {'blabla': 12346}),
                           [self.me, self.other, self.leadermem], None, SyncState.empty(), None, None)
-        global_config.update(cluster)
+        self.s.sync_replication_slots(cluster, False)
-        self.s.sync_replication_slots(cluster, self.tags)
         with patch.object(SlotsHandler, '_query', Mock(side_effect=[[('blabla', 'physical', 12345, None, None, None,
                                                                       None, None)], Exception])) as mock_query, \
                 patch('patroni.postgresql.slots.logger.error') as mock_error:
-            self.s.sync_replication_slots(cluster, self.tags)
+            self.s.sync_replication_slots(cluster, False)
             self.assertEqual(mock_query.call_args[0],
                              ("SELECT pg_catalog.pg_replication_slot_advance(%s, %s)", "blabla", '0/303A'))
             self.assertEqual(mock_error.call_args[0][0],

tests/test_sync.py

@@ -1,9 +1,9 @@
 import os
 
-from mock import Mock, patch, PropertyMock
+from mock import Mock, patch
 
-from patroni import global_config
 from patroni.collections import CaseInsensitiveSet
+from patroni.config import GlobalConfig
 from patroni.dcs import Cluster, SyncState
 from patroni.postgresql import Postgresql
 
@@ -13,7 +13,6 @@ from . import BaseTestPostgresql, psycopg_connect, mock_available_gucs
 @patch('subprocess.call', Mock(return_value=0))
 @patch('patroni.psycopg.connect', psycopg_connect)
 @patch.object(Postgresql, 'available_gucs', mock_available_gucs)
-@patch.object(global_config.__class__, 'is_synchronous_mode', PropertyMock(return_value=True))
 class TestSync(BaseTestPostgresql):
 
     @patch('subprocess.call', Mock(return_value=0))
@@ -25,6 +24,7 @@ class TestSync(BaseTestPostgresql):
     def setUp(self):
         super(TestSync, self).setUp()
         self.p.config.write_postgresql_conf()
+        self.p._global_config = GlobalConfig({'synchronous_mode': True})
         self.s = self.p.sync_handler
 
     @patch.object(Postgresql, 'last_operation', Mock(return_value=1))
@@ -96,6 +96,7 @@ class TestSync(BaseTestPostgresql):
         self.assertEqual(value_in_conf(), None)
 
         mock_reload.reset_mock()
+        self.p._global_config = GlobalConfig({'synchronous_mode': True})
         self.s.set_synchronous_standby_names(CaseInsensitiveSet('*'))
         mock_reload.assert_called()
         self.assertEqual(value_in_conf(), "synchronous_standby_names = '*'")

tests/test_validator.py

@@ -13,21 +13,6 @@ available_dcs = [m.split(".")[-1] for m in dcs_modules()]
 config = {
     "name": "string",
     "scope": "string",
-    "log": {
-        "type": "plain",
-        "level": "DEBUG",
-        "traceback_level": "DEBUG",
-        "format": "%(asctime)s %(levelname)s: %(message)s",
-        "dateformat": "%Y-%m-%d %H:%M:%S",
-        "max_queue_size": 100,
-        "dir": "/tmp",
-        "file_num": 10,
-        "file_size": 1000000,
-        "loggers": {
-            "patroni.postmaster": "WARNING",
-            "urllib3": "DEBUG"
-        }
-    },
     "restapi": {
         "listen": "127.0.0.2:800",
         "connect_address": "127.0.0.2:800",
@@ -372,29 +357,3 @@ class TestValidator(unittest.TestCase):
         c["tags"]["failover_priority"] = -6
         errors = schema(c)
         self.assertIn('tags.failover_priority -6 didn\'t pass validation: Wrong value', errors)
-
-    def test_json_log_format(self, *args):
-        c = copy.deepcopy(config)
-        c["log"]["type"] = "json"
-        c["log"]["format"] = {"levelname": "level"}
-        errors = schema(c)
-        self.assertIn("log.format {'levelname': 'level'} didn't pass validation: Should be a string or a list", errors)
-
-        c["log"]["format"] = []
-        errors = schema(c)
-        self.assertIn("log.format [] didn't pass validation: should contain at least one item", errors)
-
-        c["log"]["format"] = [{"levelname": []}]
-        errors = schema(c)
-        self.assertIn("log.format [{'levelname': []}] didn't pass validation: "
-                      "each item should be a string or a dictionary with string values", errors)
-
-        c["log"]["format"] = [[]]
-        errors = schema(c)
-        self.assertIn("log.format [[]] didn't pass validation: "
-                      "each item should be a string or a dictionary with string values", errors)
-
-        c["log"]["format"] = ['foo']
-        errors = schema(c)
-        output = "\n".join(errors)
-        self.assertEqual(['postgresql.bin_dir', 'raft.bind_addr', 'raft.self_addr'], parse_output(output))

tests/test_zookeeper.py

@@ -7,10 +7,8 @@ from kazoo.handlers.threading import SequentialThreadingHandler
 from kazoo.protocol.states import KeeperState, WatchedEvent, ZnodeStat
 from kazoo.retry import RetryFailedError
 from mock import Mock, PropertyMock, patch
-from patroni.dcs import get_dcs
 from patroni.dcs.zookeeper import Cluster, PatroniKazooClient, \
     PatroniSequentialThreadingHandler, ZooKeeper, ZooKeeperError
-from patroni.postgresql.mpp import get_mpp
 
 
 class MockKazooClient(Mock):
@@ -150,9 +148,9 @@ class TestZooKeeper(unittest.TestCase):
 
     @patch('patroni.dcs.zookeeper.PatroniKazooClient', MockKazooClient)
     def setUp(self):
-        self.zk = get_dcs({'scope': 'test', 'name': 'foo', 'ttl': 30, 'retry_timeout': 10, 'loop_wait': 10,
+        self.zk = ZooKeeper({'hosts': ['localhost:2181'], 'scope': 'test',
-                           'zookeeper': {'hosts': ['localhost:2181'], 'set_acls': {'CN=principal2': ['ALL']}}})
+                             'name': 'foo', 'ttl': 30, 'retry_timeout': 10, 'loop_wait': 10,
-        self.assertIsInstance(self.zk, ZooKeeper)
+                             'set_acls': {'CN=principal2': ['ALL']}})
 
     def test_reload_config(self):
         self.zk.reload_config({'ttl': 20, 'retry_timeout': 10, 'loop_wait': 10})
@@ -166,47 +164,30 @@ class TestZooKeeper(unittest.TestCase):
 
     def test__cluster_loader(self):
         self.zk._base_path = self.zk._base_path.replace('test', 'bla')
-        self.zk._postgresql_cluster_loader(self.zk.client_path(''))
+        self.zk._cluster_loader(self.zk.client_path(''))
         self.zk._base_path = self.zk._base_path = '/broken'
-        self.zk._postgresql_cluster_loader(self.zk.client_path(''))
+        self.zk._cluster_loader(self.zk.client_path(''))
         self.zk._base_path = self.zk._base_path = '/legacy'
-        self.zk._postgresql_cluster_loader(self.zk.client_path(''))
+        self.zk._cluster_loader(self.zk.client_path(''))
         self.zk._base_path = self.zk._base_path = '/no_node'
-        self.zk._postgresql_cluster_loader(self.zk.client_path(''))
+        self.zk._cluster_loader(self.zk.client_path(''))
 
     def test_get_cluster(self):
         cluster = self.zk.get_cluster()
         self.assertEqual(cluster.last_lsn, 500)
 
     def test__get_citus_cluster(self):
-        self.zk._mpp = get_mpp({'citus': {'group': 0, 'database': 'postgres'}})
+        self.zk._citus_group = '0'
         for _ in range(0, 2):
             cluster = self.zk.get_cluster()
             self.assertIsInstance(cluster, Cluster)
             self.assertIsInstance(cluster.workers[1], Cluster)
 
-    @patch('patroni.dcs.logger.error')
+    @patch('patroni.dcs.zookeeper.logger.error')
-    def test_get_mpp_coordinator(self, mock_logger):
+    @patch.object(ZooKeeper, '_cluster_loader', Mock(side_effect=Exception))
-        self.assertIsInstance(self.zk.get_mpp_coordinator(), Cluster)
-        with patch.object(ZooKeeper, '_postgresql_cluster_loader', Mock(side_effect=Exception)):
-            self.assertIsNone(self.zk.get_mpp_coordinator())
-            mock_logger.assert_called_once()
-            self.assertEqual(mock_logger.call_args[0][0], 'Failed to load %s coordinator cluster from %s: %r')
-            self.assertEqual(mock_logger.call_args[0][1], 'Null')
-            self.assertEqual(mock_logger.call_args[0][2], 'ZooKeeper')
-            self.assertIsInstance(mock_logger.call_args[0][3], ZooKeeperError)
-
-    @patch('patroni.dcs.logger.error')
     def test_get_citus_coordinator(self, mock_logger):
-        self.zk._mpp = get_mpp({'citus': {'group': 0, 'database': 'postgres'}})
+        self.assertIsNone(self.zk.get_citus_coordinator())
-        self.assertIsInstance(self.zk.get_mpp_coordinator(), Cluster)
+        mock_logger.assert_called_once()
-        with patch.object(ZooKeeper, '_postgresql_cluster_loader', Mock(side_effect=Exception)):
-            self.assertIsNone(self.zk.get_mpp_coordinator())
-            mock_logger.assert_called_once()
-            self.assertEqual(mock_logger.call_args[0][0], 'Failed to load %s coordinator cluster from %s: %r')
-            self.assertEqual(mock_logger.call_args[0][1], 'Citus')
-            self.assertEqual(mock_logger.call_args[0][2], 'ZooKeeper')
-            self.assertIsInstance(mock_logger.call_args[0][3], ZooKeeperError)
 
     def test_delete_leader(self):
         self.assertTrue(self.zk.delete_leader(self.zk.get_cluster().leader))