apt-get update 
apt-get install docker 
systemctl enable --now docker

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add
cat << EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
sudo apt-get update 
sudo apt-get install -y kubelet=1.18.8-00 kubeadm=1.18.8-00 kubectl=1.18.8-00

swapoff --all && sed -i '/^.*swap.*/ d' /etc/fstab

kubeadm init --kubernetes-version 1.18.6

kubectl --kubeconfig=/etc/kubernetes/admin.conf get pods 

wget https://docs.projectcalico.org/v3.14/manifests/calico.yaml
sed -i 's/3.14.2/3.14.1/' calico.yaml
kubectl --kubeconfig=/etc/kubernetes/admin.conf create -f calico.yaml

echo 'source <(kubectl completion bash)' >> ~/.bashrc
source ~/.bashrc
mkdir -p ~/.kube
cp /etc/kubernetes/admin.conf ~/.kube/config

kubectl edit node <node name> # To find node name use #kubectl get node -o name
# Remove following line under specs: section
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master

curl -sS https://itmconsult.ir/kubernetes/installation/kubernetes_installation.sh | sudo bash