??Step-by-step setup Kubernetes Cluster in EC2

Kubeadm Installation Guide :

This guide outlines the steps needed to set up a Kubernetes cluster using kubeadm.

Pre-requisites :

?Ubuntu OS (Xenial or later)

?sudo privileges

?Internet access

?t2.medium instance type or higher

Both Master & Worker Node :

? Run the following commands on both the master and worker nodes to prepare them for kubeadm.

sudo apt update
sudo apt-get install -y apt-transport-https ca-certificates curl
sudo apt install docker.io -y

sudo systemctl enable --now docker # enable and start in single command.

# Adding GPG keys.
curl -fsSL "https://packages.cloud.google.com/apt/doc/apt-key.gpg" | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/kubernetes-archive-keyring.gpg

# Add the repository to the sourcelist.
echo 'deb https://packages.cloud.google.com/apt kubernetes-xenial main' | sudo tee /etc/apt/sources.list.d/kubernetes.list

sudo apt update 
sudo apt install kubeadm=1.20.0-00 kubectl=1.20.0-00 kubelet=1.20.0-00 -y        

?Sample Command run on master node

Master Node:

?Initialize the Kubernetes master node.

sudo kubeadm init        

After successfully running, your Kubernetes control plane will be initialized successfully.

?Set up local kubeconfig (both for root user and normal user):

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config        

?Apply Weave network:

kubectl apply -f https://github.com/weaveworks/weave/releases/download/v2.8.1/weave-daemonset-k8s.yaml        

?Generate a token for worker nodes to join:

sudo kubeadm token create --print-join-command        

?Expose port 6443 in the Security group for the Worker to connect to Master Node:

Worker Node :

?Run the following commands on the worker node:

sudo kubeadm reset pre-flight checks        

?Paste the join command you got from the master node and append --v=5 at the end. Make sure to use sudo before the command

After succesful join :-

Verify Cluster Connection:

?On Master Node:

kubectl get nodes