Nginx + Postgres + RabbitMQ + PgAdmin + other app

docker-compose.yml

version: '3.7'

services:

  # App service
  app:
    build: .
    restart: always
    container_name: app
    volumes:
      - ./app.ini:/app/app.ini:ro
      - ./uploads:/app/uploads
      - ./dumps:/app/dupms
      - ./tests:/app/tests/
    networks:
      - app_frontend
      - app_backend
      - db_backend
    deploy:
      labels:
        environment: "Staging"
      # Deploy two containers for the app service
      mode: replicated
      replicas: 2
      # The restart policy only works in Docker Compose Version 3.7
      # If the service needs to restart, restart graceful to ensure that
      # there's no down time and at least one container is up for the service.
      restart_policy:
        delay: 3m
        max_attempts: 6
        window: 3m
      # If rollback is needed in case of failure or anything, then gracefully
      # rollback each service container one after another after ensure the
      # container was succesfully rollback with positive health checks.
      rollback_config:
        parallelism: 1
        delay: 2m
        monitor: 2m
        order: stop-first
      # Gracefully stop, update and restart each service container one after
      # another, but not before ensure that the
      # container was succesfully updated with positive health checks.
      update_config:
        parallelism: 1
        delay: 2m
        monitor: 2m
        # Docker Compose Version 3.7 feature
        order: stop-first
    env_file: .env
    depends_on:
      - rabbitmq
    expose:
      - 8080

  rabbitmq:
    image: rabbitmq:3-management-alpine
    container_name: rabbitmq
    networks:
      # Set the external ip address of the container
      # to a static ip to allow other applications
      # that is dockerized to access RabbitMQ via the static ip address
      # while allow other containers to access the RabbitMQ by using the
      # service name.
      app_backend:
      rabbitmq_net:
        ipv4_address: 172.90.239.10
        ipv6_address: 2021:3101:3289::10
    env_file: .env
    restart: always
    ports:
      - 5672:5672
      - 15672:15672

  # Load balancer the containers for the app microservice.
  nginx:
    image: nginx:1.17
    container_name: app_nginx
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf:ro
    depends_on:
      - app
    ports:
      - "12050:80"
    networks:
      - app_frontend

  postgres:
    image: postgres:12
    env_file: .env
    volumes:
      - ./.docker/dbdata:/var/lib/postgresql/data
    networks:
      - db_backend
    ports:
      - "5432:5432"

  pgadmin:
    image: dpage/pgadmin4
    env_file: .env
    volumes:
       - ./.docker/pgadmindata:/root/.pgadmin
    ports:
      - "12050:80"
    depends_on: 
      - postgres
    networks:
      - db_backend

# Seeting up networks
networks:
  app_frontend:
  app_backend:
  db_backend:
  rabbitmq_net:
    ipam:
      driver: default
      config:
        - subnet: "172.90.239.0/24"
        - subnet: "2020:3804:3089::/64"