docker-compose.yml

version: '3'
services:
  postgres-serv:
    image: postgres
    ports:
      - 5432
    volumes:
      - postgres_data:/var/lib/postgresql
    environment:
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=postgres-password
  pgpool-serv:
    image: bitnami/pgpool
    ports:
      - 5432:5432
    volumes:
      - ./pgpool-extra.conf:/config/myconf.conf
    environment:
      # https://github.com/bitnami/bitnami-docker-pgpool#configuration
      - PGPOOL_BACKEND_NODES=0:postgres-serv:5432
      - PGPOOL_SR_CHECK_USER=postgres
      - PGPOOL_SR_CHECK_PASSWORD=postgres-password
      - PGPOOL_POSTGRES_USERNAME=postgres
      - PGPOOL_POSTGRES_PASSWORD=postgres-password
      - PGPOOL_ADMIN_USERNAME=pgpool
      - PGPOOL_ADMIN_PASSWORD=pgpool-password
      - PGPOOL_USER_CONF_FILE=/config/myconf.conf
volumes:
  postgres_data: