Destroy a cluster

Drain workers

kubectl drain k3w1 --ignore-daemonsets

Delete workers

kubectl delete node k8s-03-worker-02

Reset control plane

sudo kubeadm reset -f

uninstall

sudo apt purge -y kubeadm kubectl kubelet kubernetes-cni
sudo apt autoremove -y

Clean data

sudo rm -rf /etc/cni /etc/kubernetes /var/lib/kubelet /var/lib/etcd /var/run/kubernetes ~/.kube