OPS drill — NOT on any current exam curriculum. "Implement etcd backup and restore" was an explicit CKA bullet through v1.31, and was REMOVED in the v1.32 restructure (Feb 2025). It is absent from CKA v1.35, CKAD v1.35 and CKS v1.34. See docs/curriculum.md.
Kept because it is real operational skill and exercises static pods, the kubelet, and PKI paths in one go — but do not spend exam-prep time here.
Target time: 8 minutes
The cluster's etcd runs as a static pod on the control-plane node.
Take an etcd snapshot and save it INSIDE the control-plane node at: /opt/etcd-backup.db
Confirm the snapshot is valid (non-zero revision, correct hash).
You will need the CA cert, server cert and key that the etcd static pod already uses. Find them — do not guess the paths.
Control-plane node name: muscle-control-plane