GitHub Actions: Dive into actions-runner-controller (ARC) || Advanced installation & configuration

Actions Runner Controller (ARC) is a Kubernetes operator that orchestrates and scales self-hosted runners for GitHub Actions. With ARC, you can create runner scale sets that automatically scale based on the number of workflows running in your repository, organization, or enterprise.

This video is a deep dive into the different components of ARC, the design decisions, the helm chart configurations and everything you need to know to successfully use it.

▬▬▬▬▬▬ Resources & References 📕 ▬▬▬▬▬▬

- ARC documentation: https://gh.io/arc-docs
- ARC repository: https://github.com/actions/actions-ru...

▬▬▬▬▬▬ Chapters 🕐  ▬▬▬▬▬▬

00:00:00 - Intro
00:01:01 - Brief history
00:01:55 - Docs walkthrough & design decisions
00:08:10 - Architecture overview
00:09:54 - What are runner scale sets?
00:15:20 - Controller manager & listener
00:24:33 - The ARC repository structure
00:25:19 - GitHub support vs community support
00:27:51 - Legacy runner images
00:31:58 - ARC releases (artifacts & packages)
00:33:17 - The helm charts packages
00:35:05 - Why 2 helm charts?
00:36:46 - Legacy ARC packages
00:39:54 - ARC pre-requisites setup
00:48:29 - Controller-manager configuration options
01:02:54 - Installing the controller-manager
01:07:37 - Installing a runner scale set
01:08:36 - Link to GitHub Actions App setup
01:10:14 - Creating a GitHub App Kubernetes secret
01:12:57 - HTTP proxy configuration
01:16:18 - Min-max boundaries
01:18:40 - Runner scale set name override
01:19:58 - Custom CA self-signed certificates
01:29:04 - Understanding containerMode
01:33:45 - Configuring Docker in Docker (DinD) container mode
01:36:57 - Installing a runner scale set (DinD mode)
01:43:31 - Docker in Docker (Dind) simple workflow demo
01:46:47 - DinD with service container demo
01:50:08 - Kubernetes container mode
01:58:00 - Troubleshooting a failed installation
01:59:59 - Kubernetes mode demo with service container

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