Operate kubeadm workflows for setting up, joining, upgrading, and resetting Kubernetes clusters. The reference covers configuration files, command phases, certificates, bootstrap tokens, and kubeconfig generation, helping explain what each step manages across control-plane and worker nodes.
Use when working with the kubeadm CLI — bootstrapping Kubernetes clusters, init/join/reset/upgrade workflows, the phase system, certificate management, bootstrap tokens, kubeconfig generation, and the v1beta4 configuration API. Triggers on: "kubeadm", "kubeadm init", "kubeadm join", "kubeadm reset", "kubeadm upgrade", "kubeadm config", "kubeadm token", "kubeadm certs", "kubeadm kubeconfig", "kubeadm version", "kubeadm alpha", "bootstrap token", "InitConfiguration", "ClusterConfiguration", "JoinConfiguration", "ResetConfiguration", "NodeRegistrationOptions", "control-plane-endpoint", "discovery-token", "certificate-key", "feature-gates", "skip-phases", "static pod manifest", "TLS bootstrap", "kubeadm-config".
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See how to installReview the instructions the agent will receive before you install.
A structured reference for the kubeadm CLI — the Kubernetes cluster bootstrapping tool. Covers the command surface, the phase workflow system, the v1beta4 configuration API, certificate and token management, and the conceptual model behind cluster init/join/upgrade/reset. See https://kubernetes.io/docs/reference/setup-tools/kubeadm/.
kubeadm init (control-plane node)
→ preflight checks
→ PKI/cert generation (/etc/kubernetes/pki)
→ kubeconfig generation (/etc/kubernetes/*.conf)
→ static Pod manifests (/etc/kubernetes/manifests)
→ kubelet starts control plane Pods
→ upload-config + bootstrap-token
→ addons (CoreDNS, kube-proxy)
→ join command printed
kubeadm join (worker or control-plane node)
→ discovery (token or file)
→ TLS bootstrap (CSR auto-approved)
→ kubelet definitive identity
→ [control-plane] download certs + etcd join
Load the reference that matches your task. When in doubt, load multiple references.
| Keywords | Reference |
|---|---|
| concepts, bootstrapping, control plane, etcd, static pods, bootstrap tokens, TLS bootstrap, discovery, kubeconfig files, feature gates | references/concepts.md |
| init, kubeadm init, control-plane init, init phases, init flags, pod-network-cidr, service-cidr, upload-certs, certificate-key | references/init.md |
| join, kubeadm join, worker node, control-plane join, discovery-token, discovery-file, ca-cert-hash, tls-bootstrap-token | references/join.md |
| phases, skip-phases, phase tree, init phase, join phase, reset phase, upgrade phase, phase invocation | references/phases.md |
| config, kubeadm config, InitConfiguration, ClusterConfiguration, JoinConfiguration, ResetConfiguration, UpgradeConfiguration, NodeRegistrationOptions, v1beta4, print init-defaults, migrate, validate, images | references/config.md |
| certs, kubeadm certs, renew, certificate-key, check-expiration, generate-csr, certificate inventory, CA, external CA | references/certs.md |
| token, kubeadm token, bootstrap token, create, delete, generate, list, token-ttl, token usages | references/token.md |
| upgrade, kubeadm upgrade, apply, plan, node, diff, upgrade phases, certificate-renewal, etcd-upgrade | references/upgrade.md |
| reset, kubeadm reset, reset phases, cleanup-node, remove-etcd-member, force reset | references/reset.md |
| kubeconfig, kubeadm kubeconfig, kubeconfig user, version, alpha | references/misc.md |
| global flags, rootfs, v, vmodule, kubeconfig flag, dry-run, ignore-preflight-errors, patches, cri-socket, preflight checks | references/flags.md |
kubectl usage, see the kubectl reference at https://kubernetes.io/docs/reference/kubectl/.completers/common/kubeadm_completer/.No reviews yet. Tell others what you thought.
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