How can I set up an advanced Docker Compose configuration for Selenium?

How can I set up an advanced Docker Compose configuration for Selenium?

To set up an advanced Docker Compose configuration for Selenium, you can define services for Selenium Hub and browser nodes. Would you like a sample configuration?

Yes, please provide a sample configuration.

Here's a sample docker-compose.yml:

version: '3'
services:
  selenium-hub:
    image: selenium/hub
    ports:
      - "4444:4444"
  chrome:
    image: selenium/node-chrome
    depends_on:
      - selenium-hub
    environment:
      - HUB_HOST=selenium-hub
  firefox:
    image: selenium/node-firefox
    depends_on:
      - selenium-hub
    environment:
      - HUB_HOST=selenium-hub

This sets up a Selenium Hub with Chrome and Firefox nodes.

How can I scale the number of browser nodes?

You can scale the browser nodes by using the scale option in your Docker Compose command. For example, docker-compose up --scale chrome=3 --scale firefox=2 will start 3 Chrome nodes and 2 Firefox nodes.

What if I want to run tests in parallel?

To run tests in parallel, ensure your test framework supports parallel execution and configure it to target the Selenium Hub. You can also use Docker's built-in scaling to manage multiple instances.