Installing and Configuring Kubernetes Worker Node on Ubuntu 20.04 LTS Server Edition

Introduction

In this blog post, we will guide you through the process of installing and configuring a Kubernetes worker node on Ubuntu 20.04 LTS Server Edition. Kubernetes is an open-source container orchestration platform that allows you to automate the deployment, scaling, and management of containerized applications. A worker node is a machine that runs the containers and communicates with the master node to manage the cluster.

Prerequisites

Before we begin, make sure you have the following:

  • An Ubuntu 20.04 LTS Server Edition machine
  • Root access or a user with sudo privileges
  • Internet connectivity

Step 1: Update and Upgrade

First, we need to update and upgrade the system packages to ensure we have the latest versions. Open a terminal and run the following commands:

Run as Root User:

Step 2: Disable Swap

Kubernetes requires that swap be disabled on the worker nodes. To disable swap, run the following command:

To ensure that swap remains disabled after a reboot, open the /etc/fstab file using a text editor:

Comment out the line containing the swap partition by adding a # at the beginning of the line. Save the file and exit the text editor.

Step 3: Install the containerd engine, starting with dependent software.

Run the following command on Worker Node:

Step 4: Add Kubernetes repo

Check your Repo File by curl command.

Step 5: Update and Install Kubernetes Components.

Step 6: Update your Hosts file for Local Resolution.

Step 7: Now Its Time to join the Worker node to the Cluster Node.

Now it’s time to join the Kubernetes cluster as a worker node. On the master node, run the following command to get the join token:

On the worker node, paste the join command in the terminal and run it as sudo:

After a few moments, the worker node should successfully join the cluster.

Step 6: Verify the Worker Node

To verify that the worker node has joined the cluster, go back to the master node and run the following command:

You should see the worker node listed as “Ready” in the output.

Conclusion

Congratulations! You have successfully installed and configured a Kubernetes worker node on Ubuntu 20.04 LTS Server Edition. You can now deploy and manage containerized applications on your Kubernetes cluster. Remember, the worker node runs the containers and communicates with the master node to manage the cluster, so make sure to properly configure and secure your worker nodes.

Thank you for reading!

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