This a gist for quick uninstall kubernetes
If the cluster is node, First delete it from master
kubectl drain <node name> — delete-local-data — force — ignore-daemonsets
kubectl delete node <node name>
Then remove kubeadm completely
kubeadm reset
# on debian base
sudo apt-get purge kubeadm kubectl kubelet kubernetes-cni kube*
#on centos base
sudo yum remove kubeadm kubectl kubelet kubernetes-cni kube*
# on debian base
sudo apt-get autoremove
#on centos base
sudo yum autoremove
sudo rm -rf ~/.kube