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Nnamdi Kenneth Nwosu
Nnamdi Kenneth Nwosu

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How To Setup Kubernetes Cluster with master and worker node ( kubelet, kubeadm and kubectl)

#aws #kubernetes #ec2 #devops

  1. Create Two Ubuntu VM (MASTER AND WORKER): and SSH Into them using the link here

  2. Install Docker Engine on both VM and enable Docker:

sudo apt-get install -y docker.io sudo usermod –aG docker Ubuntu sudo chmod 777 /var/run/docker.sock sudo systemctl start docker sudo systemctl enable docker sudo systemctl status docker
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  1. Installing kubelet, kubeadm and kubectl: 
sudo apt-get update sudo apt-get install -y apt-transport-https ca-certificates curl gpg
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Download the public signing key for the Kubernetes package repositories. The same signing key is used for all repositories so you can disregard the version in the URL: 

curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
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Add the appropriate Kubernetes apt repository. 

echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
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Update the apt package index, install kubelet, kubeadm and kubectl, and pin their version: 

sudo apt-get update sudo apt-get install -y kubelet kubeadm kubectl sudo apt-mark hold kubelet kubeadm kubectl
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Enable the kubelet service before running kubeadm 

sudo systemctl restart kubelet sudo systemctl status kubelet sudo systemctl status kubelet
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Adding kubeadm to a network (ON THE MASTER VM ONLY) 

sudo kubeadm init --apiserver-advertise-address=(PRIVATE IP OF VM) --pod-network-cidr=192.168.0.0/16
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Adding kubenetes cluser:

mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config
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Back on WORKER NODE:
Follow the same process to - Install kubelet, kubeadm and kubectl:

Join the Master and Worker with the Join Command:

  • Using the JOIN Command looks like this on the vm 
sudo kubeadm join 172.31.56.164:6443 --token y82mmu.a9wairsns2hhrgtu \ --discovery-token-ca-cert-hash sha256:fd617bad969a4275a7a8d03c6bcb3a9a115196feb14c27ffc5371495e1dc6f84
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to retrive the join command incase you didnt save it run this on Master VM

kubeadm token create --print-join-command
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To test on Master VM:

kubectl get nodes
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its show node NOT READY.

Set your port network Using Calico manifest:
click here for doc info

curl https://raw.githubusercontent.com/projectcalico/calico/v3.28.0/manifests/calico.yaml -O kubectl apply -f calico.yaml
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Run these commands on MASTER

kubectl get nodes kubectl get pod -A
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Create a pod to TEST:

kubectl run my-pod --image=nginx kubectl get pods
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Thank You for Following and Practicing.

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