Kops Upgrading Kubernetes

By | June 4, 2018

Upgrading Kubernetes
Upgrading Kubernetes is easy with kops. The cluster spec contains a KubernetesVersion, so you can simply edit it with kops edit, and apply the updated configuration to your cluster.

The kops upgrade command also automates checking for and applying updates.

It is recommended to run the latest version of Kops to ensure compatibility with the target KubernetesVersion. When applying a Kubernetes minor version upgrade (e.g. v1.5.3 to v1.6.0), you should confirm that the target KubernetesVersion is compatible with the current Kops release.

Note: if you want to upgrade from a kube-up installation, please see the instructions for how to upgrade kubernetes installed with kube-up.

Manual update
kops edit cluster $NAME
set the KubernetesVersion to the target version (e.g. v1.3.5)
kops update cluster $NAME to preview, then kops update cluster $NAME –yes
kops rolling-update cluster $NAME to preview, then kops rolling-update cluster $NAME –yes
Automated update
kops upgrade cluster $NAME to preview, then kops upgrade cluster $NAME –yes
In future the upgrade step will likely perform the update immediately (and possibly even without a node restart), but currently you must:

kops update cluster $NAME to preview, then kops update cluster $NAME –yes
kops rolling-update cluster $NAME to preview, then kops rolling-update cluster $NAME –yes
Upgrade uses the latest Kubernetes version considered stable by kops, defined in https://github.com/kubernetes/kops/blob/master/channels/stable.

Terraform Users
kops edit cluster $NAME
set the KubernetesVersion to the target version (e.g. v1.3.5)
NOTE: The next 3 steps must all be ran in the same directory
kops update cluster $NAME –target=terraform
terraform plan
terraform apply
kops rolling-update cluster $NAME to preview, then kops rolling-update cluster $NAME –yes
Other Notes:
In general, we recommend that you upgrade your cluster one minor release at a time (1.7 –> 1.8 –> 1.9). Although jumping minor versions may work if you have not enabled alpha features, you run a greater risk of running into problems due to version deprecation.

Referral -> https://github.com/kubernetes/kops/blob/master/docs/upgrade.md

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