Version 1.14. This version is no longer supported. For information about how to upgrade to version 1.15, seeUpgrading Anthos on bare metalin the 1.15 documentation. For more information about supported and unsupported versions, see theVersion historypage in the latest documentation.
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
mustrotate your CAsat least once every five years.
Certificates for cluster components
Cluster components use certificates for authentication. These components
includekube-apiserver,kube-controller-manager,kube-scheduler,etcdandkubelet. The certificates are valid for one year and are renewed during
clusterupgrade. To prevent the certificates from
expiring, you must upgrade your cluster at least once a year.
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