Introduction

This tutorial aims to guide you through the process of verifying your Kubernetes installation and configuration. It's essential to ensure that Kubernetes, a powerful open-source platform used to manage containerized workloads and services, has been correctly set up to prevent future deployment issues.

By the end of this tutorial, you will be able to:
- Validate your Kubernetes installation
- Verify the correct functioning of your Kubernetes configuration

Prerequisites:
- Basic knowledge of Kubernetes
- Kubernetes installed on your local machine

Step-by-Step Guide

1. Check Kubernetes Version
2. After installing Kubernetes, you should validate the installation by checking the version. Run the following command in your terminal:
   kubectl version

3. This command will display the Client Version (kubectl version) and Server Version (Kubernetes cluster version).

4. Verify Node Status

5. Once you've confirmed the Kubernetes version, the next step is to verify the status of your Kubernetes nodes.
   kubectl get nodes
6. This command will show all nodes that can be used to host our applications. The NAME column is the name of the node, STATUS column indicates if the node is working, and the AGE column shows how long the node has been running.

Code Examples

1. Kubernetes Version Verification
2. Run the following command in your terminal to check the Kubernetes version:
   bash kubectl version

3. The output should look something like this:
   bash Client Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.2", ...} Server Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.2", ...}

4. Node Status Verification

5. Run the following command in your terminal to verify the node status:
   bash kubectl get nodes
6. The output should look something like this:
   bash NAME STATUS ROLES AGE VERSION minikube Ready master 2m30s v1.20.2

Summary

In this tutorial, we've verified our Kubernetes installation and configuration by checking the Kubernetes version and the status of Kubernetes nodes.

Next, you might want to learn how to deploy applications on your Kubernetes cluster or how to configure Kubernetes services and deployments.

Additional Resources:
- Kubernetes Documentation
- Kubernetes GitHub

Practice Exercises

1. Exercise 1: Run the command that gives detailed information about the Kubernetes node.

2. Solution: The command is kubectl describe node <node-name>. Replace <node-name> with the name of your node. This command provides detailed information about the node's resources, specs, status, and events.

3. Exercise 2: List all the pods running in your Kubernetes cluster.

4. Solution: The command is kubectl get pods. This command lists all the pods running in your Kubernetes cluster.

5. Exercise 3: Run a command that provides the configuration info of your Kubernetes cluster.

6. Solution: The command is kubectl cluster-info. This command will give you URLs of Kubernetes master and services.

Remember, practice is the key to mastering any new skill. Keep experimenting with different Kubernetes commands to gain more confidence.