dockerfiles/selenium/docker-stack.yml

version: '3.5'
services:
  hub:
    image: selenium/hub:3.141.59-radium
    ports:
      - "4444:4444"
    volumes:
      - /dev/shm:/dev/shm
    environment:
      - JAVA_OPTS=-Xmx512m
      - GRID_TIMEOUT=60
      - GRID_BROWSER_TIMEOUT=30
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.role == manager
      restart_policy:
        condition: on-failure
  chrome:
    image: selenium/node-chrome:3.141.59-radium
    ports:
      - "5555:5555"
    volumes:
      - /dev/shm:/dev/shm
    environment:
      - HUB_HOST=hub
      - HUB_PORT=4444
      - REMOTE_HOST=http://{{.Task.Name}}:5555
      - NODE_MAX_INSTANCES=4
      - NODE_MAX_SESSION=4
    depends_on:
      - hub
    deploy:
      replicas: 8
      placement:
        constraints:
          - node.role == worker
      restart_policy:
        condition: on-failure
networks:
  default:
    ipam:
      config:
        - subnet: 192.168.127.0/24