Cluster Upgrade Procedure

CKP supports rolling upgrades across Kubernetes versions. The upgrade process follows a standard node-by-node approach:

1. Download — the updated CKP packages for the target Kubernetes version
2. Drain — the node to safely evict workloads
3. Install — the new CKP packages on the node
4. Restart — the kubelet service to pick up the new binaries
5. Uncordon — the node to allow workload scheduling again
6. Apply — the Kubernetes upgrade via kubeadm on the master node(s)