Restarting (1) 9 seconds ago while running docker-compose up -d for bitnami/postgresql-repmgr:12.11.0 image.

 Hello Guys, 

This is blog is related to issue of bitnami/postgresql-repmgr:12.11.0  docker image setup. While I was performing setup of bitnami/postgresql-repmgr image, I was facing below error and docker was running Restarting mode.

INFO  ==> ** Starting PostgreSQL with Replication Manager setup **

INFO  ==> Validating settings in REPMGR_* env vars...

ERROR ==> The node name does not follow the required format. Valid format: ^.*+-[0-9]+$

$ docker ps 

CONTAINER ID   IMAGE                               COMMAND                  CREATED         STATUS                          PORTS     NAMES

f9be9b16b283   bitnami/postgresql-repmgr:12.11.0   "/opt/bitnami/script…"   5 minutes ago   Restarting (1) 42 seconds ago             instance-1-a1

Solution : In my case below docker-compose.yml was used and  found recommendation was do not use  container/service/rep name like instance-1-a1, mean don't use double (-). 

Same updated and fixed my issue.

Original Creating problem:

------------------------------------
version: "3.0"
services:
  instance-1-a1:
    image: bitnami/postgresql-repmgr:12.11.0
    container_name: instance-1-a1
    restart: always
    networks:
      - database
    ports:
      - 5432:5432
    volumes:
      - ./instance-1-a1/conf/:/bitnami/repmgr/conf/
      - ./instance-1-a1/logs/:/opt/bitnami/postgresql/logs/
    environment:
      - POSTGRESQL_PASSWORD=XXXXXXXXXX
      - POSTGRESQL_POSTGRES_PASSWORD=XXXXXXXXX
      - POSTGRESQL_USERNAME=postgres
      - POSTGRESQL_DATABASE=pg-db
      - REPMGR_NODE_NETWORK_NAME=host1
      - REPMGR_NODE_ID=1
      - REPMGR_PASSWORD=xxxxxxxxx
      - REPMGR_PRIMARY_HOST=host1
      - REPMGR_PRIMARY_PORT=5432
      - REPMGR_PARTNER_NODES=host1,host2:5432,host3:5432
      - REPMGR_NODE_NAME=instance-1-a1
      - REPMGR_LOG_LEVEL=DEBUG
      - REPMGR_PORT_NUMBER=5432

networks:
  database:

    external: true

Updated docker-compose.yml which fixed the problem:
--------------------------------------------------------------------

version: "3.0"
services:
  instance-1:
    image: bitnami/postgresql-repmgr:12.11.0
    container_name: instance-1
    restart: always
    networks:
      - database
    ports:
      - 5432:5432
    volumes:
      - ./instance-1-a1/conf/:/bitnami/repmgr/conf/
      - ./instance-1-a1/logs/:/opt/bitnami/postgresql/logs/
    environment:
      - POSTGRESQL_PASSWORD=XXXXXXXXXX
      - POSTGRESQL_POSTGRES_PASSWORD=XXXXXXXXX
      - POSTGRESQL_USERNAME=postgres
      - POSTGRESQL_DATABASE=pg-db
      - REPMGR_NODE_NETWORK_NAME=host1
      - REPMGR_NODE_ID=1
      - REPMGR_PASSWORD=xxxxxxxxx
      - REPMGR_PRIMARY_HOST=host1
      - REPMGR_PRIMARY_PORT=5432
      - REPMGR_PARTNER_NODES=host1,host2:5432,host3:5432
      - REPMGR_NODE_NAME=instance-1
      - REPMGR_LOG_LEVEL=DEBUG
      - REPMGR_PORT_NUMBER=5432

networks:
  database:

    external: true

Note: Updated parameter marked in bold above, do not change hostname or any folder name.

$docker-compose down -v 

$docker-compose up -d 

$  docker ps

CONTAINER ID   IMAGE                               COMMAND                  CREATED          STATUS          PORTS                                       NAMES

c5ad890ff90b   bitnami/postgresql-repmgr:12.11.0   "/opt/bitnami/script…"   37 minutes ago   Up 37 minutes   0.0.0.0:5432->5432/tcp, :::5432->5432/tcp   instance-1

Thanks !!!