You can use this repo to setup a selenium grid with docker and webdriverIO. This is a work in progress and will be updated as I learn more about webdriverIO and docker. You will need to install docker compose if you don't have it before using the docker-compose.yml which is the easiest way to setup the docker containers after putting the yaml file wherever you want to run it from use the following command:

docker-compose -f docker-compose.yml up

To stop it, hit Ctrl+C

docker-compose -f docker-compose.yml down

These only allow for 1 instance of each nod

These are some of the steps to setup webdriverIO with docker service to work with selenium grid. This is a work in progress and will be updated as I learn more about webdriverIO and docker.

npm init wdio .

npm init wdio ./path/to/my/project

npm install wdio-docker-service --save-dev

services: ['docker'], // add docker service to services array

hostname: HOSTNAME,
ports: PORT,
path: '/',  // for root path

These are the settings that need to be added to the capabilities:

capabilities: [
    {
        maxInstances: 5,
        browserName: 'chrome',
        'goog:chromeOptions': {
        args: ['--disable-dev-shm-usage']
    }
    },
    {
        maxInstances: 5,
        browserName: 'firefox',
    },
    {
        maxInstances: 5,
        browserName: 'MicrosoftEdge',
    },
  ],