etcd

Endpoint status across cluster Show leader, DB size and raft index per member; spot bloat and split-brain at a glance ETCDCTL_API=3 etcdctl --endpoints=https://<ip>:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key endpoint status --cluster -w table #etcd#k8s#observability Snapshot save then defrag Back up etcd then reclaim space; defrag clears NOSPACE alarm after compaction; do off-peak ETCDCTL_API=3 etcdctl snapshot save /backup/snap.db && etcdctl defrag --cluster && etcdctl alarm disarm #etcd#disk#troubleshooting Check control-plane leader leases Verify apiserver health + which node holds scheduler/CM leader election lease curl -sk https://localhost:6443/healthz && kubectl -n kube-system get lease kube-scheduler kube-controller-manager #etcd#k8s#observability