Plan and apply upgrade kubeadm
Preview available versions then upgrade control-plane; upgrade kubelet/kubectl separately after
kubeadm upgrade plan && kubeadm upgrade apply v1.30.2
more kubeadm
all 5 commands →
Init HA control-plane endpoint
kubeadm init --control-plane-endpoint "<host>:6443" --upload-certs --pod-network-cidr=10.244.0.0/16
Print fresh join command
kubeadm token create --print-join-command
Check cert expiration
kubeadm certs check-expiration
Renew all certs then restart
kubeadm certs renew all && systemctl restart kubelet