You can upgrade the existing Management Kubernetes Cluster version to the latest versions of Kubernetes supported in the current version of the VMware Telco Cloud Automation.

You can upgrade the Kubernetes cluster through VMware Telco Cloud Automation.

Note: When you upgrade a management cluster to the latest version, the certificate renewal of the cluster is automatically enabled and the number of days defaults to 90.

The following table lists the Kubernetes upgrade compatibility for the Management cluster when upgrading from VMware Telco Cloud Automation.

VMware Telco Cloud Automation Existing Kubernetes Versions 1.25.7 1.26.8
3.0

1.24.10

Yes

 No
3.0 1.25.7 No Yes
Important: You must first upgrade your management cluster to 1.25.7 and then upgrade to 1.26.8

Before upgrading Kubernetes to the latest version, consider the following constraints and prepare for the upgrade plan:

  • VMware Telco Cloud Automation preserves the customization performed through previous CNF instantiate / upgrade on the nodepools of the cluster. Any manual changes performed directly on the nodes are not preserved.

  • Applications may face downtime during kubernetes upgrade and may take some time to be available for operations.

  • Clusters may take some time to be available for operations.

  • Check and upgrade the required node pools in the Workload cluster.

  • The IP addresses of master nodes and the worker nodes change after upgrade.

  • If the upgrade fails, you can correct the configuration and perform the upgrade again.