Setting Up a Kubernetes Cluster: Post-Installation Steps

Congratulations! Your Kubernetes cluster is ready, and we’re setting up the user environment.

We are only a few steps away from the finish line. Soon, you will be able to create pods, deployments, and more in your cluster.

1. Configure kubectl for Regular Users

To use kubectl (the Kubernetes command-line tool), follow these steps:

1. Create the .kube directory in your home folder:

(Note: Execute the below command from the user where you want to manage your Kubernetes cluster.)

mkdir -p $HOME/.kube

1. Copy the Kubernetes configuration file to your user's home directory:

sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

1. Change ownership of the configuration file to your user:

sudo chown $(id -u):$(id -g) $HOME/.kube/config

2. Verify Node Status

Your node status is not ready yet! Don't worry, it will be ready soon.

kubectl get nodes

3. Set Up Autocomplete for kubectl

To enable autocomplete for kubectl in your current shell session, run:

source <(kubectl completion bash)

To make this change permanent, add the following line to your ~/.bashrc file:

echo "source <(kubectl completion bash)" >> ~/.bashrc

4. Install WeaveNet CNI

WeaveNet is a popular Container Network Interface (CNI) plugin for Kubernetes. It provides networking between pods across different nodes in the cluster.

Execute the following command to apply the WeaveNet CNI configuration:

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

5. Verify Node Status

After applying WeaveNet, check the status of your nodes:

kubectl get nodes

Your nodes should now show the status as "Ready."

2. Join Additional Nodes to the Cluster ,

This need to be execute from the worker nodes.

To add more nodes to your cluster, run the following command on each node as the root user:

kubeadm join <control-plane-host>:<control-plane-port> --token <token> --discovery-token-ca-cert-hash sha256:<hash>

Replace <control-plane-host>, <control-plane-port>, <token>, and <hash> with the appropriate values.

Alternatively, you can get the same join command by executing the following on the master node:

kubeadm token create --print-join-command

Now you're all set! Your Kubernetes cluster is ready.

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Feel free to make any necessary modifications to this document. If you have any questions or additional requests, please let me know. 😊

References

• kubectl Quick Reference

• Creating a cluster with kubeadm