version: '3.8'

services:
  portainer:
    image: portainer/portainer-ce:latest
    command: -H unix:///var/run/docker.sock
    ports:
      - "9000:9000"
      - "9443:9443"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - portainer_data:/data
    networks:
      - portainer_net
    deploy:
      placement:
        constraints:
          - node.role == manager
      restart_policy:
        condition: on-failure
      replicas: 1
  # db:
  #   image: postgres
  #   restart: always
  #   environment:
  #     POSTGRES_PASSWORD: example
  #   volumes:
  #     - pgdata:/var/lib/postgresql/data 
  #   networks:
  #     - portainer_net
  #   deploy:
  #     placement:
  #       constraints:
  #         - node.role == manager
  #     restart_policy:
  #       condition: on-failure
  #     replicas: 1
volumes:
  portainer_data:
    external: true

networks:
  portainer_net:
    driver: overlay
    attachable: true