From the course: Certified Kubernetes Administrator (CKA) Cert Prep (2024)

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Performing cluster node upgrades

Performing cluster node upgrades

- In this video, you'll learn how to perform a cluster node upgrade. So before you upgrade the cluster node, you better understand what the procedure is all about. Kubernetes clusters can be upgraded from one to another minor version. That means you can go from 1.24 to 1.25, but you cannot go from 1.23 to 1.25. And even a subversion upgrade is allowed, and that's what we are going to do here. In order to do so, first you will have to upgrade kubeadm, and next you'll need to upgrade the control plane node. And after upgrading the control plane node, you can take care of everything else. Just as an exam tip, and this is an important one. In the documentation which is available on the exam, just use upgrading kubeadm clusters. There you will find a step by step guide, and that's exactly what we are going to do in this procedure. But before we do it, let me outline the different steps. So first you will upgrade kubeadm, then you use kubeadm upgrade plan to check available versions. And…

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