How to setup Selenium Grid in AWS

Selenium is a test automation framework that lets you script interactions against your web apps and run them in popular web browsers.
Selenium Grid is a management service that coordinates the use of many instances of these browsers. You can point your Selenium scripts to a Grid,
specify which “capabilities” (OS version, browser version, etc.) it would like in an interactive session, then drive actions in that browser session to verify functional correctness of a target app or website.

Well, for one, it’s not popping up multiple browsers on your workstation while you’re trying to get other work done. In build and continuous integration scenarios, you need to run automated Selenium scripts on an environment
that doesn’t include the laptops your developers take home with them at night.

You also want your test environment to be as versioned and reliable as possible, so having an on-demand grid that can be scripted as an AWS YAML descriptor and that meets your manual, on-demand, and CI testing requirements is a modern must.

Let´s split and describe the setup process into the following steps:

7. Same logic can be applied for a delete script called from a Jenkins job; in this case the job should not take any parameters:

NOTE: We also need a delete script because we assume that we run our tests batches sporadically; therefore we try to reduce the costs to Amazon, associated with the run time of the EC2 instances, on top of which the Selenium Grid infrastructure is built.

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