https://labs.play-with-k8s.com
kubeadm init --apiserver-advertise-address $(hostname -i)
kubectl get nodes
kubectl apply -n kube-system -f
"https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
kubectl get nodes
kubeadm join --token [kube init token]
kubectl get nodes