![]() ![]() You will also need to build your own images on an AArch64-based system or jump through some hoops to allow your regular x86_64 systems to build AArch64 images. In practice, you will find some images that are not built for both architectures and may not be usable in your cluster. Without getting too deep in the woods explaining different architecture types, it is worth noting that ARM64/AArch64 and x86_64 architectures differ, and Kubernetes nodes running on 64-bit ARM architecture cannot run container images built for x86_64. eBook: A guide to Kubernetes for SREs and sysadmins.eBook: Running Kubernetes on your Raspberry Pi homelab.How to explain Kubernetes in plain terms.An introduction to enterprise Kubernetes.This is why the Ubuntu 20.04 ARM64 image is so useful. Systems with AArch64/ARM64 architecture are capable of running 32-bit ARM images, but the opposite is not true: a 32-bit ARM system cannot run 64-bit container images. Many container images are labeled AArch64 and will run fine on systems labeled ARM64. The different names arise from their use within different communities. Note that AArch64 and ARM64 are effectively the same thing. With its ARM64 image, Ubuntu 20.04 allows you to use 64-bit container images with Kubernetes. ![]() Since the goal is to use these Raspberry Pis for running a Kubernetes cluster, the ability to run AArch64 container images is important: it can be difficult to find 32-bit images for common software or even standard base images. Ubuntu 20.04 (Focal Fossa) offers a Raspberry Pi-focused 64-bit ARM (ARM64) image with both a 64-bit kernel and userspace. This exercise will install a Kubernetes 1.18.2 cluster on three or more Raspberry Pi 4s running Ubuntu 20.04. Install a Kubernetes cluster on Raspberry Pis Running a local Kubernetes cluster on cheap Raspberry Pi hardware is a great way to gain experience managing and developing on a true cloud technology giant. Nothing says "cloud" quite like Kubernetes, and nothing screams "cluster me!" quite like Raspberry Pis. It is a perfect choice for a "private cloud at home" project, providing both robust container orchestration and the opportunity to learn about a technology in such demand and so thoroughly integrated into the cloud that its name is practically synonymous with "cloud computing." Kubernetes manages containers and more, from micro-scale at the edge to massive scale, in both public and private cloud environments. It has grown to be the de-facto cloud container platform, continuing to expand as it has embraced new technologies, including container-native virtualization and serverless computing. Kubernetes is an enterprise-grade container-orchestration system designed from the start to be cloud-native.
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