Volume could be passed to the docker only with absolute path

In addition to that add zookeeper support to the docker.

Dockerfile

@@ -10,7 +10,7 @@ ENV PGVERSION 9.5
 ENV PATH /usr/lib/postgresql/${PGVERSION}/bin:$PATH
 RUN apt-get update -y \
     && apt-get upgrade -y \
-    && apt-get install -y curl jq haproxy postgresql-${PGVERSION} python-psycopg2 python-yaml \
+    && apt-get install -y curl jq haproxy zookeeper postgresql-${PGVERSION} python-psycopg2 python-yaml \
         python-requests python-six python-click python-dateutil python-tzlocal python-urllib3 \
         python-dnspython python-pip python-setuptools python-kazoo python-prettytable python \
     && pip install python-etcd==0.4.3 python-consul==0.6.0 --upgrade \
@@ -34,14 +34,9 @@ ADD extras/confd /etc/confd
 RUN ln -s /patronictl.py /usr/local/bin/patronictl
 
 ### Setting up a simple script that will serve as an entrypoint
-RUN mkdir /data/ && touch /pgpass /patroni.yml /var/run/haproxy.pid \
-    && chown postgres:postgres -R /patroni/ /data/ /pgpass /patroni.yml /etc/haproxy /var/run/haproxy.pid \
-    && for name in etcd haproxy; do \
-        for ext in log err; do \
-            touch /var/log/$name.$ext \
-            && chown postgres:postgres /var/log/$name.$ext; \
-        done; \
-    done
+RUN mkdir /data/ && touch /pgpass /patroni.yml \
+    && chown postgres:postgres -R /patroni/ /data/ /pgpass /patroni.yml /etc/haproxy /var/run/ /var/lib/ /var/log/ \
+    && echo 1 > /etc/zookeeper/conf/myid
 
 EXPOSE 2379 5432 8008
 

docker/dev_patroni_cluster.sh

@@ -86,11 +86,12 @@ docker_run ${ETCD_CONTAINER} ${DOCKER_IMAGE} --etcd
 
 DOCKER_ARGS="--link=${ETCD_CONTAINER}:${ETCD_CONTAINER} -e PATRONI_SCOPE=${PATRONI_SCOPE} -e PATRONI_ETCD_HOST=${ETCD_CONTAINER}:2379"
 PATRONI_ENV=$(sed 's/#.*//g' docker/patroni-secrets.env | sed -n 's/^PATRONI_.*$/-e &/p' | tr '\n' ' ')
+PATRONI_VOLUME="-v $(dirname $(dirname $(realpath $0)))/patroni:/patroni"
 
 for i in $(seq 1 "${MEMBERS}"); do
     container_name=postgres${i}
     docker_run "${PATRONI_SCOPE}_${container_name}" \
-        -v patroni:/patroni \
+        $PATRONI_VOLUME \
         $DOCKER_ARGS \
         $PATRONI_ENV \
         -e PATRONI_NAME=${container_name} \

docker/entrypoint.sh

@@ -9,11 +9,13 @@ Options:
 
     --etcd      Do not run Patroni, run a standalone etcd
     --confd     Do not run Patroni, run a standalone confd
+    --zookeeper Do not run Patroni, run a standalone zookeeper
 
 Examples:
 
     $0 --etcd
     $0 --confd
+    $0 --zookeeper
     $0
 __EOF__
 }
@@ -28,15 +30,26 @@ while getopts "$optspec" optchar; do
         -)
             case "${OPTARG}" in
                 confd)
-                    while ! curl -s ${PATRONI_ETCD_HOST}/v2/members | jq -r '.members[0].clientURLs[0]' | grep -q http; do
-                        sleep 1
-                    done
                     haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -D
-                    exec confd -prefix=${PATRONI_NAMESPACE:-/service}/$PATRONI_SCOPE -backend etcd -node $PATRONI_ETCD_HOST -interval=10
+                    CONFD="confd -prefix=${PATRONI_NAMESPACE:-/service}/$PATRONI_SCOPE -interval=10 -backend"
+                    if [ ! -z ${PATRONI_ZOOKEEPER_HOSTS} ]; then
+                        while ! /usr/share/zookeeper/bin/zkCli.sh -server ${PATRONI_ZOOKEEPER_HOSTS} ls /; do
+                            sleep 1
+                        done
+                        exec $CONFD zookeeper -node ${PATRONI_ZOOKEEPER_HOSTS}
+                    else
+                        while ! curl -s ${PATRONI_ETCD_HOST}/v2/members | jq -r '.members[0].clientURLs[0]' | grep -q http; do
+                            sleep 1
+                        done
+                        exec $CONFD etcd -node $PATRONI_ETCD_HOST
+                    fi
                     ;;
                 etcd)
                     exec etcd $ETCD_ARGS
                     ;;
+                zookeeper)
+                    exec /usr/share/zookeeper/bin/zkServer.sh start-foreground
+                    ;;
                 cheat)
                     CHEAT=1
                     ;;
@@ -61,7 +74,7 @@ while getopts "$optspec" optchar; do
 done
 
 ## We start an etcd
-if [ -z ${PATRONI_ETCD_HOST} ]; then
+if [[ -z ${PATRONI_ETCD_HOST} && -z ${PATRONI_ZOOKEEPER_HOSTS} ]]; then
     etcd $ETCD_ARGS > /var/log/etcd.log 2> /var/log/etcd.err &
     export PATRONI_ETCD_HOST="127.0.0.1:2379"
 fi
@@ -71,7 +84,7 @@ export PATRONI_NAME="${PATRONI_NAME:-${HOSTNAME}}"
 export PATRONI_RESTAPI_CONNECT_ADDRESS="${DOCKER_IP}:8008"
 export PATRONI_RESTAPI_LISTEN="0.0.0.0:8008"
 export PATRONI_admin_PASSWORD="${PATRONI_admin_PASSWORD:=admin}"
-export PATRONI_admin_OPTIONS="$PATRONI_admin_OPTIONS:-createdb, createrole}"
+export PATRONI_admin_OPTIONS="${PATRONI_admin_OPTIONS:-createdb, createrole}"
 export PATRONI_POSTGRESQL_CONNECT_ADDRESS="${DOCKER_IP}:5432"
 export PATRONI_POSTGRESQL_LISTEN="0.0.0.0:5432"
 export PATRONI_POSTGRESQL_DATA_DIR="data/${PATRONI_SCOPE}"
@@ -93,7 +106,7 @@ bootstrap:
 __EOF__
 
 mkdir -p "$HOME/.config/patroni"
-ln -s /patroni.yml "$HOME/.config/patroni/patronictl.yaml"
+[ -h "$HOME/.config/patroni/patronictl.yaml" ] || ln -s /patroni.yml "$HOME/.config/patroni/patronictl.yaml"
 
 [ -z $CHEAT ] && exec python /patroni.py /patroni.yml
 

patroni-compose-etcd-3.yml

@@ -12,7 +12,7 @@ dbnode1:
     links:
         - patroni_etcd:patroni_etcd
     volumes:
-        - patroni:/patroni
+        - ./patroni:/patroni
     env_file: docker/patroni-secrets.env
     environment:
         PATRONI_ETCD_HOST: patroni_etcd:2379
@@ -25,7 +25,7 @@ dbnode2:
     links:
         - patroni_etcd:patroni_etcd
     volumes:
-        - patroni:/patroni
+        - ./patroni:/patroni
     env_file: docker/patroni-secrets.env
     environment:
         PATRONI_ETCD_HOST: patroni_etcd:2379
@@ -38,7 +38,7 @@ dbnode3:
     links:
         - patroni_etcd:patroni_etcd
     volumes:
-        - patroni:/patroni
+        - ./patroni:/patroni
     env_file: docker/patroni-secrets.env
     environment:
         PATRONI_ETCD_HOST: patroni_etcd:2379