dockerfiles/selenium/docker-stack.yml

version: '3.8'

services:

  hub:
    image: selenium/hub:3.141.59
    ports:
      - "4444:4444"
    volumes:
      - /dev/shm:/dev/shm
    environment:
      - JAVA_OPTS=-Xmx2g
      - GRID_TIMEOUT=200
      - GRID_BROWSER_TIMEOUT=180
      - GRID_CLEAN_UP_CYCLE=5000
      - GRID_MAX_SESSION=9999
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.role == manager
      restart_policy:
        condition: on-failure

  firefox:
    image: selenium/node-firefox:3.141.59
    entrypoint: bash -c 'REMOTE_HOST=http://$$HOSTNAME:5555 /opt/bin/entry_point.sh'
    volumes:
      - /dev/shm:/dev/shm
    environment:
      - HUB_HOST=hub
      - HUB_PORT=4444
      - NODE_MAX_INSTANCES=4
      - NODE_MAX_SESSION=4
      - NODE_UNREGISTER_IF_STILL_DOWN_AFTER=30000
    depends_on:
      - hub
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.role == manager
      restart_policy:
        condition: on-failure

  chrome:
    image: selenium/node-chrome:3.141.59
    entrypoint: bash -c 'REMOTE_HOST=http://$$HOSTNAME:5555 /opt/bin/entry_point.sh'
    volumes:
      - /dev/shm:/dev/shm
    environment:
      - HUB_HOST=hub
      - HUB_PORT=4444
      - NODE_MAX_INSTANCES=8
      - NODE_MAX_SESSION=8
      - NODE_UNREGISTER_IF_STILL_DOWN_AFTER=30000
    depends_on:
      - hub
    deploy:
      replicas: 8
      placement:
        constraints:
          - node.role == worker
      restart_policy:
        condition: on-failure

networks:
  default:
    ipam:
      config:
        - subnet: 192.168.100.0/24