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kubeadm versionNotes
Print kubeadm version information.
kubeadm Cheat Sheet
Bootstrap, join, cert, kubeconfig, reset, phase, image, and upgrade commands for kubeadm-managed clusters.
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Cluster Bootstrap
Initialize and inspect kubeadm-based clusters.
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kubeadm init --pod-network-cidr=10.244.0.0/16Notes
Bootstrap a new control plane.
Initialize with cert upload
Initialize HA control plane and upload certs for additional control-plane joins.
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kubeadm init --control-plane-endpoint=k8s.example.com --upload-certsNotes
Initialize HA control plane and upload certs for additional control-plane joins.
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kubeadm token createNotes
Create a bootstrap token for joining nodes.
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kubeadm token create --print-join-commandNotes
Generate a ready-to-run join command.
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kubeadm token listNotes
Show active kubeadm bootstrap tokens.
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kubeadm token delete abcdef.0123456789abcdefNotes
Invalidate a bootstrap token.
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kubeadm join k8s.example.com:6443 --token abcdef.0123456789abcdef --discovery-token-ca-cert-hash sha256:<hash>Notes
Join a worker node to the cluster.
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kubeadm join k8s.example.com:6443 --token abcdef.0123456789abcdef --discovery-token-ca-cert-hash sha256:<hash> --control-plane --certificate-key <key>Notes
Join an additional control-plane node.
Certificates and kubeconfig
Operate kubeadm-managed PKI and kubeconfig files.
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kubeadm certs check-expirationNotes
See kubeadm-managed certificate expiry dates.
Renew all certificates
Renew all kubeadm-managed control-plane certificates.
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kubeadm certs renew allNotes
Renew all kubeadm-managed control-plane certificates.
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kubeadm certs renew apiserverNotes
Renew the API server certificate only.
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kubeadm certs certificate-keyNotes
Generate a certificate key for control-plane join.
Generate kubeconfig for user
Generate a kubeconfig file for a user credential.
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kubeadm kubeconfig user --client-name=platform-adminNotes
Generate a kubeconfig file for a user credential.
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kubeadm init phase upload-certs --upload-certsNotes
Run only the cert upload phase.
Phases, Reset, and Upgrade
Break apart the lifecycle for advanced administration.
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kubeadm init phase preflightNotes
Run kubeadm preflight checks.
Run control-plane phase
Run control-plane static pod generation phases.
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kubeadm init phase control-plane allNotes
Run control-plane static pod generation phases.
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kubeadm resetNotes
Remove kubeadm state from a node.
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kubeadm reset -fNotes
Reset a node non-interactively.
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kubeadm upgrade planNotes
Check available and recommended upgrade targets.
Apply control-plane upgrade
Upgrade the control plane to a target version.
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kubeadm upgrade apply v1.35.2Notes
Upgrade the control plane to a target version.
Upgrade node components
Run node-side upgrade steps after packages are updated.
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kubeadm upgrade nodeNotes
Run node-side upgrade steps after packages are updated.
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kubeadm config print init-defaultsNotes
Generate a baseline kubeadm init configuration.
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kubeadm config images listNotes
Show control-plane images for the chosen version.
Pre-pull required images
Pre-pull images before cluster bootstrap or upgrade.
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kubeadm config images pullNotes
Pre-pull images before cluster bootstrap or upgrade.
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