docker-compose-scales.yml

# The purpose of this -scales example is to run 1 hub, N chromes, N firefox
#
# Usage:
#  docker-compose -f docker-compose-scales.yml -p grid up --force-recreate
# How to scale it:
#  docker-compose -f docker-compose-scales.yml -p grid scale hub=1 chrome=2 firefox=1
version: '3'

services:
  hub:
    image: elgalu/selenium
    ports:
      - 4444:4444
    volumes:
      - /dev/shm:/dev/shm
    privileged: true
    environment:
      - SELENIUM_HUB_HOST=hub
      - SELENIUM_HUB_PORT=4444
      - GRID=true
      - CHROME=false
      - FIREFOX=false

  chrome:
    image: elgalu/selenium
    depends_on:
      - hub
    volumes:
      - /dev/shm:/dev/shm
    privileged: true
    environment:
      - SELENIUM_HUB_HOST=hub
      - SELENIUM_HUB_PORT=4444
      - SELENIUM_NODE_HOST={{CONTAINER_IP}}
      - SCREEN_WIDTH=1300
      - SCREEN_HEIGHT=999
      - VIDEO=false
      - AUDIO=false
      - GRID=false
      - CHROME=true
      - FIREFOX=false

  firefox:
    image: elgalu/selenium
    depends_on:
      - hub
    volumes:
      - /dev/shm:/dev/shm
    privileged: true
    environment:
      - SELENIUM_HUB_HOST=hub
      - SELENIUM_HUB_PORT=4444
      - SELENIUM_NODE_HOST={{CONTAINER_IP}}
      - SCREEN_WIDTH=1300
      - SCREEN_HEIGHT=999
      - VIDEO=false
      - AUDIO=false
      - GRID=false
      - CHROME=false
      - FIREFOX=true