Question

You are upgrading a kubeadm-managed cluster. The control plane has already been upgraded to v1.29.2. You now need to upgrade a worker node named 'worker-3'. You have run 'apt-get install kubeadm=1.29.2-*' and 'kubeadm upgrade node' on worker-3. What is the correct sequence of remaining steps to safely complete the worker upgrade, minimizing disruption to running workloads?

Accepted Answer

From a control-plane node run 'kubectl drain worker-3 --ignore-daemonsets', then on worker-3 upgrade kubelet and kubectl packages, run 'systemctl daemon-reload && systemctl restart kubelet', then run 'kubectl uncordon worker-3'.

Answer

On worker-3 upgrade kubelet and kubectl packages first, restart kubelet, then run 'kubectl drain worker-3' and finally 'kubectl uncordon worker-3'.

Answer

Run 'kubectl cordon worker-3', upgrade kubelet, restart kubelet, then re-run 'kubeadm upgrade apply v1.29.2' on worker-3 to finalize the node.

Answer

From a control-plane node run 'kubectl drain worker-3 --force --delete-emptydir-data', upgrade kubelet, restart kubelet — no uncordon is needed because drain automatically re-enables scheduling after upgrade.