This training will show how to setup a CI pipeline on a local system as well as on an external cluster, starting with a simple example up to a larger full functional pipeline of a real project. It will also present a flexible and robust solution to set up CI that can work in various scenarios. The solution is built using a set of widely available technologies such as Apptainer, SSH, and Tmux. The training will contain a live demo showing common pitfalls, solutions, and best practices. At the end, it will be shown how this approach works under the hood.

This training will cover the following topics:

• Installation, creation, and registration of GitLab runners.
• Creation of a simple pipeline within GitLab.
• Introduction of additional options by examples from the OpenGadget3 CI pipeline.
• Technical requirements for setting up a pipeline on a supercomputer.
• Running slurm jobs in a CI pipeline.
• Integration GitLab-runner with Slur using Apptainer.
• Common pitfalls and best practices.