🧭 Step 3: Initialize the Kubernetes Control Plane

In this step, you'll use kubeadm to initialize the Kubernetes cluster from the control plane node.

✅ Tip: Replace <your-node-hostname> with names like cp-node-1, worker-1, etc., to keep things clear.

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📍 On the Control Plane Node (cp-node-1)

Run the following command:

bash

🔍 Explanation

• --apiserver-advertise-address: This is the IP address of your control plane node.
• --pod-network-cidr: Required for the Pod network. For example, Flannel uses 10.244.0.0/16.

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🖥️ Example Output

You should see output ending like this:

bash

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🛠 Configure kubectl Access

Now copy the admin.conf to your user's .kube directory:

bash

Once done, test access using:

bash

You should see the control plane node in a NotReady state—this is expected because the pod network is not yet installed.

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🔧 What kubeadm Did

• Created /etc/kubernetes/manifests/ containing static pod definitions for:
  • kube-apiserver
  • kube-controller-manager
  • kube-scheduler
• Set up a working etcd and control plane environment.
• Generated all required certificates.

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⏭ Next Step

Now that the control plane is ready, let's install a Pod network plugin.

👉 Continue to Install Pod Network Plugin →