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How to Upgrade Kubeadm Kubernetes Clusters The Fast Way
My home lab Kubernetes cluster built with kubeadm hasn’t got an upgrade for a while, still at 1.29 which was first released roughly 2 years ago. And the latest is 1.33 already. According to the official kubeadm docs Skipping MINOR versions when upgrading is unsupported. Which basically says, if you try to upgrade from 1.29…
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How to Upgrade a Kubernetes Cluster with `kubeadm` in 2024
TL; DR: I upgraded my Garage Kubernetes Lab cluster from 1.28 to 1.29 recently. Here’s how I did it. Upgrading the Control Plane First, the Linux package repository needs to be updated to include kubeadm 1.29. This can be done like this(My cluster is built with Ubuntu 22.04, for other Linux distributions please refer to…
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Rebuild a Kubernetes Node Without Downtime
When I built the in-house Kubernetes cluster with Raspberry PIs, I followed the kubeadm instructions and installed Raspberry PI OS on the PIs. It was all good except the RPI OS is 32-bit. Now I want to install a Ubuntu 20.04 Server ARM64 on this PI, below are steps with which I rebuilt the node…
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Renew Certificates Used in Kubeadm Kubernetes Cluster
It’s been more than a year since I built my Kubernetes cluster with some Raspberry PIs. There was a few times that I need to power down everything to let electricians do their work and the cluster came back online and seemed to be Ok afterwards, given that I didn’t shutdown the PIs properly at…