Development: Update Dockerfile and create possibility to run local cluster

To help in developing features, the Dockerfile and its entrypoint have been extended. The README.md explains stuff in detail, in short: - you can now run a Patroni cluster with a single command
2026-08-25 14:53:37 +00:00 · 2015-08-05 14:12:45 +02:00
parent 7c4efb33e7
commit c30d8dbd1a
5 changed files with 265 additions and 10 deletions
@@ -0,0 +1,122 @@
+#!/bin/bash
+
+function usage()
+{
+    cat <<__EOF__
+Usage: $0 
+
+Options:
+
+    --etcd      ETCD    Provide an external etcd to connect to
+    --name      NAME    Give the cluster a specific name 
+    --etcd-only         Do not run Patroni, run a standalone etcd
+
+Examples:
+
+    $0 --etcd=127.17.0.84:4001
+    $0 --etcd-only
+    $0 
+    $0 --name=true_scotsman
+__EOF__
+}
+
+DOCKER_IP=$(hostname --ip-address)
+PATRONI_SCOPE=batman
+
+optspec=":vh-:"
+while getopts "$optspec" optchar; do
+    case "${optchar}" in
+        -)
+            case "${OPTARG}" in
+                etcd-only)
+                    exec etcd --data-dir /tmp/etcd.data \
+                        -advertise-client-urls=http://${DOCKER_IP}:4001 \
+                        -listen-client-urls=http://0.0.0.0:4001 \
+                        -listen-peer-urls=http://0.0.0.0:2380 
+                    exit 0
+                    ;;
+                name)
+                    PATRONI_SCOPE="${!OPTIND}"; OPTIND=$(( $OPTIND + 1 ))
+                    ;;
+                name=*)
+                    PATRONI_SCOPE=${OPTARG#*=}
+                    ;;
+                etcd)
+                    ETCD_CLUSTER="${!OPTIND}"; OPTIND=$(( $OPTIND + 1 ))
+                    ;;
+                etcd=*)
+                    ETCD_CLUSTER=${OPTARG#*=}
+                    ;;
+                help)
+                    usage
+                    exit 0
+                    ;;
+                *)
+                    if [ "$OPTERR" = 1 ] && [ "${optspec:0:1}" != ":" ]; then
+                        echo "Unknown option --${OPTARG}" >&2
+                    fi
+                    ;;
+            esac;;
+        *)
+            if [ "$OPTERR" != 1 ] || [ "${optspec:0:1}" = ":" ]; then
+                echo "Non-option argument: '-${OPTARG}'" >&2
+                usage
+                exit 1
+            fi
+            ;;
+    esac
+done
+
+if [ -z ${ETCD_CLUSTER} ]
+then
+    etcd --data-dir /tmp/etcd.data > /var/log/etcd.log 2> /var/log/etcd.err &
+    ETCD_CLUSTER="127.0.0.1:4001"
+fi
+
+cat > /patroni/postgres.yml <<__EOF__
+
+ttl: &ttl 30
+loop_wait: &loop_wait 10
+scope: &scope ${PATRONI_SCOPE}
+restapi:
+  listen: 127.0.0.1:8008
+  connect_address: 127.0.0.1:8008
+etcd:
+  scope: *scope
+  ttl: *ttl
+  host: ${ETCD_CLUSTER}
+postgresql:
+  name: postgresql_${DOCKER_IP//./_} ## Replication slots do not allow dots in their name
+  scope: *scope
+  listen: 0.0.0.0:5432
+  connect_address: ${DOCKER_IP}:5432
+  data_dir: data/postgresql0
+  maximum_lag_on_failover: 1048576 # 1 megabyte in bytes
+  pg_hba:
+  - host all all 0.0.0.0/0 md5
+  - hostssl all all 0.0.0.0/0 md5
+  - host replication replicator ${DOCKER_IP}/16    md5
+  replication:
+    username: replicator
+    password: rep-pass
+    network:  127.0.0.1/32
+  superuser:
+    password: zalando
+  admin:
+    username: admin
+    password: admin
+  parameters:
+    archive_mode: "on"
+    wal_level: hot_standby
+    archive_command: mkdir -p ../wal_archive && cp %p ../wal_archive/%f
+    max_wal_senders: 20 
+    listen_addresses: 0.0.0.0
+    wal_keep_segments: 8
+    archive_timeout: 1800s
+    max_replication_slots: 20
+    hot_standby: "on"
+__EOF__
+
+cat /patroni/postgres.yml
+
+exec /patroni/patroni.py /patroni/postgres.yml