Install and setup Kubernetes 1.16 LAb on Ubuntu 18.04 1 master 2 node cluster

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#### Kubernetes cluster lab with ubuntu 18.04 #####
----- Step to follow on all nodes  ------------
$ sudo apt-get update
$ sudo apt-get install docker.io -y
$ sudo systemctl enable docker
$ sudo systemctl start docker
$ curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add
$ sudo apt-add-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main"
$ sudo apt install kubeadm -y

------  step on master node  -------
$ sudo kubeadm init --pod-network-cidr=10.244.0.0/16
$ mkdir -p $HOME/.kube
$ sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
$ sudo chown $(id -u):$(id -g) $HOME/.kube/config

------- join worker node ( step on worker node ) ------------
$ kubeadm join 192.168.122.220:6443 --token gefqt9.oj3kcgubehofxbz8 \
     --discovery-token-ca-cert-hash sha256:a79789ade9c95182522f55b1ab17e93cd6eac9c7eaf8b7b67a6c125bbb5f50ce

------- deploy a pod network plugin ( on master node ) ---------
$ sudo kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

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