64 lines
900 B
Markdown
64 lines
900 B
Markdown
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# Cluster Upgrade
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## Versions
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`vMajor.Minor.Patch` semantic versioning
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K8S compatibility is as follow : current and n-2 version are supported.
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**Always upgrade minor to minor releases**.
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## kubeadm
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### Check latest/upgradable version
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```shell
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kubeadm upgrade plan
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```
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## Master node upgrade
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### Drain and mark it at Unschedulable
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```shell
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kubectl drain master
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```
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`kubectl get nodes` to verify that master node is unschedulable
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### kubeadm update
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```shell
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apt install kubeadm=X.Y.Z-00
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```
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`kubeadm version` to ensure version number
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### Node update
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```shell
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kubeadm upgrade apply vX.Y.Z
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```
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`kubectl version` to validate
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### Update kubelet
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```shell
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apt install kubelet=X.Y.Z-00
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```
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`kubectl get nodes` to validate
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### Mark master node as schedulable
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```shell
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kubectl uncordon master
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```
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## Worker nodes upgrade
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Repeat the same actions done on master for each worker node
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🎉
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