Create Kubeadm-Installation.sh

Kubeadm Installation Steps

Kubeadm-Installation.sh

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+-------------------------------------- Both Master & Worker Node ---------------------------------------
+sudo apt update -y
+sudo apt install docker.io -y
+
+sudo systemctl start docker
+sudo systemctl enable docker
+
+sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
+
+echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
+
+sudo apt update -y
+sudo apt install kubeadm=1.20.0-00 kubectl=1.20.0-00 kubelet=1.20.0-00 -y
+--------------------------------------------- Master Node -------------------------------------------------- 
+sudo su
+====== Disable swap if it is enabled ========
+sudo swapon --show
+sudo swapoff -a
+vi /etc/fstab        
+============================================
+kubeadm init
+export KUBECONFIG=/etc/kubernetes/admin.conf
+kubectl apply -f https://github.com/weaveworks/weave/releases/download/v2.8.1/weave-daemonset-k8s.yaml
+kubeadm token create --print-join-command
+--------------------------------------------- Worker Node --------------------------------------------------
+sudo su
+====== Disable swap if it is enabled ======
+sudo swapon --show
+sudo swapoff -a
+vi /etc/fstab   
+============================================
+kubeadm reset pre-flight checks
+complete-output-of-join-command --v=5
+----------------------------------------------------------------------------------------------------------------------------------------
+If getting below message as output of command "kubectl get nodes",
+The connection to the server localhost:8080 was refused - did you specify the right host or port? Then perform the following on Master
+root@ubuntuvm22:/home/vadmin# export KUBECONFIG=/etc/kubernetes/admin.conf
+root@ubuntuvm22:/home/vadmin# cp /etc/kubernetes/admin.conf $HOME/
+root@ubuntuvm22:/home/vadmin# chown $(id -u):$(id -g) $HOME/admin.conf
+root@ubuntuvm22:/home/vadmin# export KUBECONFIG=$HOME/admin.conf
+root@ubuntuvm22:/home/vadmin# kubectl get nodes
+----------------------------------------------------------------------------------------------------------------------------------------