By now, you should have a firm grip on the basics of continuous integration and continuous delivery, as done by GitLab. We started out in this chapter by exploring the concept of CI/CD and giving you a crash course in it.
Next up, we ran through the process of installing a GitLab Runner. Don't forget that the Runner is the platform where your CI/CD stages are actually executed; you can have many of them per project or per GitLab installation to help parallelize the work. We looked at their installation on Ubuntu and CentOS, and manually installing one via a binary. This was followed up by configuring the Runner in the GitLab web UI and then registering it on the Runner host so that it knew which GitLab URL to connect to and set up the registration token it would need.
After we finished configuring Runners, we updated our sample project with some tests to give it a...
