Docker Compose Selenium Grid

docker-compose.yml

version: "3"
services:

  hub:
    image: selenium/hub
    ports:
      - "4444:4444"

    environment:
      GRID_MAX_SESSION: 16
      GRID_BROWSER_TIMEOUT: 3000
      GRID_TIMEOUT: 3000

  chrome:
    image: selenium/node-chrome
    container_name: web-automation_chrome
    depends_on:
      - hub
    environment:
      HUB_PORT_4444_TCP_ADDR: hub
      HUB_PORT_4444_TCP_PORT: 4444
      NODE_MAX_SESSION: 4
      NODE_MAX_INSTANCES: 4
    volumes:
      - /dev/shm:/dev/shm
    ports:
      - "9001:5900"
    links:
      - hub

  firefox:
    image: selenium/node-firefox
    container_name: web-automation_firefox
    depends_on:
      - hub
    environment:
      HUB_PORT_4444_TCP_ADDR: hub
      HUB_PORT_4444_TCP_PORT: 4444
      NODE_MAX_SESSION: 2
      NODE_MAX_INSTANCES: 2
    volumes:
      - /dev/shm:/dev/shm
    ports:
      - "9002:5900"
    links:
      - hub