Upgrade Management Cluster Kubernetes Version

You can upgrade the existing Management Cluster to the latest versions supported in 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.

Current Management Cluster Version	Target Management Cluster Version	Notes
v1.24.10	v1.25.7	If the management cluster is migrated from VMware Telco Cloud Automation 2.3, upgrade management cluster addon firstly before upgrading to the next kubernetes version.
v1.25.7	v1.26.8
v1.26.8	v1.27.5	Upgrade all workload clusters to v1.26.8+vmware.1 before upgrading the management cluster.
v1.27.5	v1.28.4
v1.28.4	v1.28.11
v1.28.7	v1.28.11

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 control plane nodes and the worker nodes change after upgrade.

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