https://www.kenmuse.com/tags/github-arc/Discover Azure, DevOps, and development insights with Ken Muse, a DevOps Architect at GitHub and 4x Microsoft Azure MVPen-usweekly1https://www.kenmuse.com/tags/github-arc/32https://www.kenmuse.com/tags/github-arc/favicon/favicon-32x32.png32https://www.kenmuse.com/blog/understanding-ipv6-from-github-to-kubernetes-arc/Sat, 08 Nov 2025 00:00:00 -0500understanding-ipv6-from-github-to-kubernetes-arcContainersDevOpsGeneralLearn how IPv6 affects your DevOps workflows, from GitHub's IP ranges to Kubernetes networking, Docker containers, and the latest ARC improvements.https://www.kenmuse.com/blog/creating-a-codeql-image-for-arc-with-python-2/Thu, 24 Jul 2025 00:00:00 -0400creating-a-codeql-image-for-arc-with-python-2ContainersDevOpsGitHubAdd Python 2 support to your CodeQL Docker image using multistage builds (and some Docker tricks) to support security scanning in ARC.https://www.kenmuse.com/blog/creating-a-codeql-image-for-arc/Sat, 19 Jul 2025 00:00:00 -0400creating-a-codeql-image-for-arcContainersDevOpsGitHubLearn how to build a custom Docker image with CodeQL pre-installed for GitHub ARC runners, eliminating download times and ensuring consistent analysis.https://www.kenmuse.com/blog/authenticating-docker-in-docker-containers-in-kubernetes/Sat, 17 May 2025 00:00:00 -0400authenticating-docker-in-docker-containers-in-kubernetesContainersDevOpsDiscover how to securely authenticate Docker-in-Docker containers inside Kubernetes to enable private registry access.https://www.kenmuse.com/blog/whats-new-in-github-arc/Mon, 31 Mar 2025 00:00:00 -0400whats-new-in-github-arcContainersDevOpsGitHubThe new version of Actions Runner Controller has performance fixes, improved configurability, and a new approach to metrics. This post reviews those changes.https://www.kenmuse.com/blog/managing-pod-resource-requests-and-limits-in-kubernetes/Thu, 02 Jan 2025 00:00:00 -0500managing-pod-resource-requests-and-limits-in-kubernetesContainersDevOpsIn Kubernetes, we cannot manage resources at the pod level and must resort to setting requests and limits on containers. Learn how that's changing.https://www.kenmuse.com/blog/using-kubernetes-native-sidecars-with-github-arc/Fri, 20 Dec 2024 00:00:00 -0500using-kubernetes-native-sidecars-with-github-arcContainersDevOpsGitHubExplore how to modernize the Docker-in-Docker support in GitHub Actions Runner Controller (ARC) using the latest Kubernetes feature: native sidecars.https://www.kenmuse.com/blog/what-is-a-github-tool-and-why-to-use-them/Sat, 02 Nov 2024 00:00:00 -0400what-is-a-github-tool-and-why-to-use-themGitHubDevOpsGitHub tools make it easier to manage the dependencies of a project and ensure your environment remains consistent and stable. Learn how to use them (and why).https://www.kenmuse.com/blog/testing-kubernetes-operators-and-controllers-with-minikube/Fri, 27 Sep 2024 00:00:00 -0400testing-kubernetes-operators-and-controllers-with-minikubeContainersDevOpsSometimes you need to try out a modified image or custom chart you're creating in Kubernetes. Minikube can make that process easier.https://www.kenmuse.com/blog/planning-kubernetes-cloud-deployments/Sat, 27 Jul 2024 00:00:00 -0400planning-kubernetes-cloud-deploymentsGitHubDevOpsUnderstanding resource allocation is a critical skill for successful Kubernetes cluster deployments. Learn how the cloud providers reserve Kubernetes resources.https://www.kenmuse.com/blog/understanding-kubernetes-resource-consumption/Fri, 19 Jul 2024 00:00:00 -0400understanding-kubernetes-resource-consumptionGitHubDevOpsSurprised that you can't fit as many pods on a node as you thought? It turns out that there's a lot more to the story of how Kubernetes allocates resources.https://www.kenmuse.com/blog/scaling-arc-on-a-schedule/Wed, 03 Jul 2024 00:00:00 -0400scaling-arc-on-a-scheduleGitHubDevOpsThe Actions Runner Controller (ARC) can't configure the minimum runner count based on a schedule. Learn to use native `CronJob` resources for the task!https://www.kenmuse.com/blog/top-five-things-to-know-about-arc/Fri, 21 Jun 2024 00:00:00 -0400top-five-things-to-know-about-arcGitHubDevOpsActions Runner Controller (ARC) is a powerful way to manage ephemeral, self-hosted GitHub runners. There are five keys that can make you successful using it.https://www.kenmuse.com/blog/the-importance-of-kubernetes-logs/Thu, 13 Jun 2024 00:00:00 -0400the-importance-of-kubernetes-logsGitHubDevOpsIf you really want to master your Kubernetes environment, it begins with understanding the value of a logging and how to implement good logging practices.https://www.kenmuse.com/blog/strategies-for-upgrading-arc/Thu, 30 May 2024 00:00:00 -0400strategies-for-upgrading-arcGitHubDevOpsUnderstand the best practices for upgrading Actions Runner Controller and minimizing downtime, including when (and if) you can skip a release.https://www.kenmuse.com/blog/building-base-images-for-arc/Thu, 09 May 2024 00:00:00 -0400building-base-images-for-arcContainersGitHubDevOpsIf you're using Actions Runner Controller, the provided base image may not be enough. Learn what's needed in your image to make your workflows run smoothly.https://www.kenmuse.com/blog/building-github-actions-runner-images-with-an-action-archive-cache/Fri, 29 Mar 2024 00:00:00 -0400building-github-actions-runner-images-with-an-action-archive-cacheContainersGitHubDevOpsIf you want to make images for GitHub Actions Runner Controller (ARC) that are fast and network-friendly, learn how to include an Action archive cache.https://www.kenmuse.com/blog/building-github-actions-runner-images-with-a-tool-cache/Thu, 28 Mar 2024 00:00:00 -0400building-github-actions-runner-images-with-a-tool-cacheContainersGitHubDevOpsIf you want to make an efficient image for GitHub Actions Runner Controller (ARC), you need to first understand how to prepopulate the runner's tool cache.https://www.kenmuse.com/blog/what-is-arc-doing/Sat, 16 Mar 2024 00:00:00 -0400what-is-arc-doingGitHubDevOpsUnderstanding ARC begins with understanding what it does (and does not do) to create runners on Kubernetes. In this post, I explore the basics of the process.https://www.kenmuse.com/blog/more-best-practices-for-deploying-github-arc/Thu, 11 Jan 2024 00:00:00 -0500more-best-practices-for-deploying-github-arcGitHubDevOpsThere are some common issues that lead to teams struggling to set up ARC, and nearly all can be avoided with these recommendations.https://www.kenmuse.com/blog/best-practices-for-deploying-github-arc/Fri, 05 Jan 2024 00:00:00 -0500best-practices-for-deploying-github-arcGitHubDevOpsThere are some common issues that lead to teams struggling to set up ARC. Nearly all of them can be avoided with these recommendations.https://www.kenmuse.com/blog/why-you-should-use-dedicated-clusters-for-github-arc/Sat, 30 Dec 2023 00:00:00 -0500why-you-should-use-dedicated-clusters-for-github-arcGitHubDevOpsI recommend using a dedicated Kubernetes cluster with GitHub Actions Runner Controller (ARC) to get the best performance and security. This post explains why.https://www.kenmuse.com/blog/the-two-github-arcs/Sat, 16 Dec 2023 00:00:00 -0500the-two-github-arcsGitHubDevOpsMany teams want to have GitHub self-hosted runners on Kubernetes using ARC, but aren’t aware there are two different versions. This post attempts to explain.https://www.kenmuse.com/blog/enabling-github-arc-metrics/Sat, 09 Dec 2023 00:00:00 -0500enabling-github-arc-metricsGitHubDevOpsLearn to enable metrics in GitHub's Actions Runner Controller (ARC) and get visibility into the processing queue and the performance of jobs and runners.https://www.kenmuse.com/blog/understanding-the-sla-of-arc/Sat, 04 Nov 2023 00:00:00 -0400understanding-the-sla-of-arcAzureDevOpsGitHubIf you're trying to increase availability by using GitHub Actions Runner Controller. In this post, I'll explain why you can't exceed the 99.9% SLA of GitHub.https://www.kenmuse.com/blog/windows-runners-on-actions-runner-controller/Thu, 26 Oct 2023 00:00:00 -0400windows-runners-on-actions-runner-controllerAzureGitHubContainersDevOpsGitHub's Actions Runner Controller (ARC) does not officially support Windows containers for runners. With a little bit of work, we can make it possible.