services:
  frontend:
    image: awesome/webapp
    networks:
      - front-tier
      - back-tier

  monitoring:
    image: awesome/monitoring
    networks:
      - admin
    

  backend:
    image: awesome/backend
    networks:
      back-tier:
        aliases:
          - database
      admin:
        aliases:
          - mysql
    volumes:
      - type: volume
        source: db-data
        target: /data
        volume:
          nocopy: true
      - type: bind
        source: /var/run/postgres/postgres.sock
        target: /var/run/postgres/postgres.sock
    links:
      - "db:database"
  db:
    image: postgres

networks:
  front-tier:
  back-tier:
  admin:
volumes:
  db-data: