version: '3.8'

services:

  hub:
    image: vimagick/ggr
    ports:
      - "4444:4444"
    environment:
      - BROWSER_NAME=chrome
      - BROWSER_VERSION=90.0
      - BROWSER_REGION=1
      - BROWSER_HOSTS=tasks.chrome
      - BROWSER_PORT=4444
      - BROWSER_COUNT=10
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.role == manager
      restart_policy:
        condition: on-failure

  chrome:
    image: selenium/standalone-chrome:3.141.59
    volumes:
      - /dev/shm:/dev/shm
    environment:
      - NODE_MAX_INSTANCES=10
      - NODE_MAX_SESSION=10
    depends_on:
      - hub
    deploy:
      replicas: 2
      placement:
        constraints:
          - node.role == worker
      restart_policy:
        condition: on-failure
      update_config:
        parallelism: 5
        delay: 10s
        order: stop-first

networks:
  default:
    driver: overlay
    attachable: true