Let's say you've got a CI/CD pipeline and you would like to run builds in containers. You could just configure Docker on one of your machines and point your builds there, but why not use something a bit more scalable? Enter Kubernetes, a leading container orchestration platform, which luckily offers several options for using its self-contained pods as on-demand CI builders. Things like sharing sources between containers and networking will be handled for you, so all you'll have to worry about is specifying the desired image.

In this blog, I'll be exploring two of those options in commonly used CI tools, namely Gitlab and Jenkins, and will explain how to configure the Gitlab-runner or Jenkins Kubernetes plugin to run on-demand CI builders on a Kubernetes (or "K8s") cluster.

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