Upgrading a Nutanix Kubernetes Platform (NKP) managed cluster is a multi-step process that involves upgrading the control plane first, followed by the worker node pools. The correct Nutanix CLI (nkp) command to upgrade the control plane's Kubernetes version is nkp update controlplane, specifying the target version. After the control plane is successfully upgraded, the worker nodes are upgraded on a per-nodepool basis using the nkp upgrade nodepool command. This two-step approach ensures a controlled and safe upgrade process, maintaining cluster stability.

A: The command update nodepool is used for scaling or modifying labels, not for upgrading the Kubernetes version. The correct command verb is upgrade.

D: The update cluster command is used for modifying cluster-level configurations, not for performing the Kubernetes version upgrade of its constituent control plane and worker nodes.

1. Nutanix Kubernetes Platform Command Line Interface (CLI) Reference v4.2: The documentation outlines the commands for managing clusters.

nkp update controlplane: This command is used to "Update a control plane

" which includes modifying the Kubernetes version. See the CLI reference for command usage. (URL: https://portal.nutanix.com/page/documents/details?targetId=Nutanix-Kubernetes-Platform-v42-CLI-Reference:Nutanix-Kubernetes-Platform-v42-CLI-Reference

Section: nkp update controlplane)

nkp upgrade nodepool: This command is specifically designed to "Upgrade a nodepool

" which is the correct procedure for upgrading the Kubernetes version on worker nodes. (URL: https://portal.nutanix.com/page/documents/details?targetId=Nutanix-Kubernetes-Platform-v42-CLI-Reference:Nutanix-Kubernetes-Platform-v42-CLI-Reference

Section: nkp upgrade nodepool)