Bootstrap and manage clusters
high risk
etcdctl snapshot save backup.dbBack up etcd before upgradeskubeadm upgrade planPlan firstCluster lifecycle tool for init, join, upgrade and certificate renewal.
| Flag | Meaning |
|---|---|
init | Create a control plane |
join | Join a node |
reset | Wipe kubeadm changes⚠ Destroys cluster state on that node. |
upgrade plan | Check upgrade path |
certs check-expiration | Certificate expiry |
kubeadm certs check-expirationCheck certificates · explain & risk-check →kubeadm upgrade planSee available upgrades · explain & risk-check →Reference text is hand-written and may be incomplete — check man kubeadm for your version. Test destructive commands on a non-production system first.