Required periodic maintenance

This document describes periodic maintenance that is required for your GKE Enterprise clusters on bare metal.

Rotate certificate authorities

The certificate authorities (CAs) in a cluster are valid for five years, so you must rotate your CAs at least once every five years.

Certificates for cluster components

Cluster components use certificates for authentication. These components include kube-apiserver, kube-controller-manager, kube-scheduler, etcd and kubelet. The certificates are valid for 1 year and are renewed during cluster upgrade. To prevent the certificates from expiring, you must upgrade your cluster at least once a year.