Fix issue/146

docker-compose.replication.yml

@@ -0,0 +1,57 @@
+version: "3.7"
+
+services:
+
+  master-db:
+    restart: always
+    container_name: master-db
+    build: .
+    ports:
+      - 5432:5432
+    environment:
+      - DEBUG=true
+
+      - DB_USER=dbuser
+      - DB_PASS=dbuserpass
+      - DB_NAME=dbname
+      - DB_TEMPLATE=
+
+      - DB_EXTENSION=
+
+      - REPLICATION_MODE=
+      - REPLICATION_USER=repluser
+      - REPLICATION_PASS=repluserpass
+      - REPLICATION_SSLMODE=
+    # command: "--wal_keep_segments=32 --logging_collector=off"
+    volumes:
+      - ./postgresql-master:/var/lib/postgresql
+
+  slave-db:
+    restart: always
+    container_name: slave-db
+    build: .
+    ports:
+      - 9432:5432
+    depends_on:
+      - master-db
+    links:
+      - master-db
+    environment:
+      - DEBUG=true
+
+      - DB_USER=
+      - DB_PASS=
+      - DB_NAME=
+      - DB_TEMPLATE=
+
+      - DB_EXTENSION=
+
+      - REPLICATION_MODE=slave
+      - REPLICATION_HOST=master-db
+      - REPLICATION_PORT=5432
+      - REPLICATION_USER=repluser
+      - REPLICATION_PASS=repluserpass
+      - REPLICATION_SSLMODE=prefer
+    # command: "--wal_keep_segments=32 --logging_collector=off"
+    volumes:
+      - ./postgresql-slave:/var/lib/postgresql

runtime/functions

@@ -6,7 +6,7 @@ source ${PG_APP_HOME}/env-defaults
 PG_CONF=${PG_DATADIR}/postgresql.conf
 PG_HBA_CONF=${PG_DATADIR}/pg_hba.conf
 PG_IDENT_CONF=${PG_DATADIR}/pg_ident.conf
-PG_RECOVERY_CONF=${PG_DATADIR}/recovery.conf
+PG_STANDBY_SIGNAL=${PG_DATADIR}/standby.signal
 
 ## Execute command as PG_USER
 exec_as_postgres() {
@@ -76,22 +76,6 @@ set_postgresql_param() {
   fi
 }
 
-set_recovery_param() {
-  local key=${1}
-  local value=${2}
-  local hide=${3}
-  if [[ -n ${value} ]]; then
-    local current=$(exec_as_postgres sed -n -e "s/^\(.*\)\(${key}=\)\([^ ']*\)\(.*\)$/\3/p" ${PG_RECOVERY_CONF})
-    if [[ "${current}" != "${value}" ]]; then
-      case ${hide} in
-        true)  echo "‣ Setting primary_conninfo parameter: ${key}" ;;
-        *) echo "‣ Setting primary_conninfo parameter: ${key} = '${value}'" ;;
-      esac
-      exec_as_postgres sed -i "s|${key}=[^ ']*|${key}=${value}|" ${PG_RECOVERY_CONF}
-    fi
-  fi
-}
-
 set_hba_param() {
   local value=${1}
   if ! grep -q "$(sed "s| | \\\+|g" <<< ${value})" ${PG_HBA_CONF}; then
@@ -266,22 +250,14 @@ set_resolvconf_perms() {
 configure_recovery() {
   if [[ ${REPLICATION_MODE} == slave ]]; then
     echo "Configuring recovery..."
-    if [[ ! -f ${PG_RECOVERY_CONF} ]]; then
-      # initialize recovery.conf on the firstrun (slave only)
-      exec_as_postgres touch ${PG_RECOVERY_CONF}
-      ( echo "standby_mode = 'on'";
-        echo "primary_conninfo = 'host=${REPLICATION_HOST} port=${REPLICATION_PORT} user=${REPLICATION_USER} password=${REPLICATION_PASS} sslmode=${REPLICATION_SSLMODE}'";
-      ) > ${PG_RECOVERY_CONF}
-    else
-      set_recovery_param "host"      "${REPLICATION_HOST}"
-      set_recovery_param "port"      "${REPLICATION_PORT}"
-      set_recovery_param "user"      "${REPLICATION_USER}"
-      set_recovery_param "password"  "${REPLICATION_PASS}"    "true"
-      set_recovery_param "sslmode"   "${REPLICATION_SSLMODE}"
+    if [[ ! -f ${PG_STANDBY_SIGNAL} ]]; then
+      # initialize standby.signal on the firstrun (slave only)
+      exec_as_postgres touch ${PG_STANDBY_SIGNAL}
     fi
+    set_postgresql_param "primary_conninfo" "host=${REPLICATION_HOST} port=${REPLICATION_PORT} user=${REPLICATION_USER} password=${REPLICATION_PASS} sslmode=${REPLICATION_SSLMODE}" "false"
   else
-    # recovery.conf can only exist on a slave node, its existence otherwise causes problems
-    rm -rf ${PG_RECOVERY_CONF}
+    # standby.signal can only exist on a slave node, its existence otherwise causes problems
+    rm -rf ${PG_STANDBY_SIGNAL}
   fi
 }