Distribute automated tests with Selenium Grid and Docker Swarm

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1. Fork/Clone

2. Create and activate a virtual environment

3. Install the requirements

4. Sign up for Digital Ocean and generate an access token

5. Add the token to your environment:

   $ export DIGITAL_OCEAN_ACCESS_TOKEN=[your_token]

6. Spin up five droplets and deploy Docker Swarm:

   $ sh project/create.sh

7. Set the environment variable:

   $ eval $(docker-machine env node-1)
   $ NODE=$(docker service ps --format "{{.Node}}" selenium_hub)
   $ export NODE_HUB_ADDRESS=$(docker-machine ip $NODE)

8. Run the tests:

   $ python project/parallel_test_run.py

9. Bring down the resources:

   $ sh project/destroy.sh