![]() So set up a security group with the following configuration: In my experience, a t2.micro EC2 instance on Ubuntu 16.04 works perfectly!īut heads up! Your Selenium Hub must be open on port 4444 (and it's generally a good idea to leave a port open for SSH). and one Node on MacStadium (for Safari).one Node on EC2 (for Chrome and Firefox). ![]() This tutorial walks through setting up a Selenium Grid, specifically: Xvfb allows Selenium to run headless (without a screen), which is necessary because EC2 instances don't have visual displays.A Selenium Grid Node is responsible for actually running the processes (and does most of the heavy lifting).A Selenium Grid Hub is sort of like a load balancer, it takes requests from remote clients and delegates them to available Nodes.Since functional tests often run pretty slow, and most websites need lots of them, running processes in parallel is critical. Selenium Grid is a way to parallelize Selenium processing.The most common (and benevolent) use case is running automated tests across browsers. Selenium is a framework for automating browser interaction.Before diving in, it's worth defining the relevant terms:
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