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· 7 min read

GitHub Self-Hosted Runner Autoscaling with Kubernetes

In this article, you will learn how to use Kubernetes to run GitHub Actions self-hosted runners on-demand. This enables you to auto-scale your runners based on the number of queued jobs, and quickly respond to spikes in workflow activity.

I will focus on GitHub Enterprise Server, but the same concepts apply to, and this post is based on the work of the Actions Runner Controller team and Natalie Somersall

GitHub Actions is a great way to run your CI/CD workflows. However, it can be complex to run a large number of self-hosted runners. Using Kubernetes to auto-scale your runners you can simplify the management of your runners. The actions-runner-controller is a Kubernetes controller that manages self-hosted.

You can find a video of this article on YouTube: