CKA v1.35 · Troubleshooting (30% — the heaviest domain in the exam) → "Troubleshoot clusters and nodes" Target time: 8 minutes
Node muscle-worker has gone NotReady. Workloads scheduled to it are
stuck.
Diagnose the cause and restore the node to Ready.
The fix must also survive a node reboot — leaving the service running but not enabled is only half an answer.
Get a shell on the node with: docker exec -it muscle-worker bash