Selenium Grid on Docker Compose

docker-compose-4.2.yml

version: "3.6"
services:

  hub:
    image: selenium/hub:4.2.2
    environment:
      GRID_MAX_SESSION: 16
      GRID_BROWSER_TIMEOUT: 3000
      GRID_TIMEOUT: 3000
    networks:
    - grid
    ports:
      - "4442-4444:4442-4444"

  chrome:
    image: selenium/node-chrome:4.2.2
    depends_on:
    - hub
    environment:
      SE_EVENT_BUS_HOST: hub
      SE_EVENT_BUS_PUBLISH_PORT: 4442
      SE_EVENT_BUS_SUBSCRIBE_PORT: 4443
      SE_NODE_MAX_SESSIONS: 3
    networks:
    - grid
    ports:
    - "9001:5900"
    volumes:
    - /dev/shm:/dev/shm

  firefox:
    image: selenium/node-firefox:4.2.2
    depends_on:
    - hub
    environment:
      SE_EVENT_BUS_HOST: hub
      SE_EVENT_BUS_PUBLISH_PORT: 4442
      SE_EVENT_BUS_SUBSCRIBE_PORT: 4443
      SE_NODE_MAX_SESSIONS: 3
    networks:
    - grid
    ports:
    - "9002:5900"
    volumes:
    - /dev/shm:/dev/shm

networks:
  grid:
    driver: bridge

docker-compose.yml

version: "3.6"
services:

  hub:
    image: selenium/hub
    environment:
      GRID_MAX_SESSION: 16
      GRID_BROWSER_TIMEOUT: 3000
      GRID_TIMEOUT: 3000
    networks:
    - grid
    ports:
      - "4444:4444"
    
  chrome:
    image: selenium/node-chrome-debug
    depends_on:
    - hub
    environment:
      HUB_PORT_4444_TCP_ADDR: hub
      HUB_PORT_4444_TCP_PORT: 4444
      NODE_MAX_SESSION: 3
      NODE_MAX_INSTANCES: 3
    networks:
    - grid
    ports:
    - "9001:5900"
    volumes:
    - /dev/shm:/dev/shm

  firefox:
    image: selenium/node-firefox-debug
    depends_on:
    - hub
    environment:
      HUB_PORT_4444_TCP_ADDR: hub
      HUB_PORT_4444_TCP_PORT: 4444
      NODE_MAX_SESSION: 3
      NODE_MAX_INSTANCES: 3
    networks:
    - grid
    ports:
    - "9002:5900"
    volumes:
    - /dev/shm:/dev/shm

#  opera:
#    image: selenium/node-opera-debug
#    depends_on:
#    - hub
#    environment:
#      HUB_PORT_4444_TCP_ADDR: hub
#      HUB_PORT_4444_TCP_PORT: 4444
#      NODE_MAX_SESSION: 2
#      NODE_MAX_INSTANCES: 2
#    networks:
#    - grid
#    ports:
#    - "9003:5900"
#    volumes:
#    - /dev/shm:/dev/shm

networks:
  grid:
    driver: bridge