In this tutorial we will show you how to install Kubernetes on CentOS 8. For those of you who didn’t know, Kubernetes is a free and open-source container management system that provides a platform for deployment automation, scaling, and operations of application containers across clusters of host computers. With Kubernetes, you can freely make use of the hybrid,on-premise, and public cloud infrastructure in order to run deployment tasks of your organization.
This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation Kubernetes on a CentOS 8 server.
Install Kubernetes on CentOS 8
Step 1. First let’s start by ensuring your system is up-to-date.
sudo dnf update
Step 2. Installing Kubernetes on CentOS 8.
Now, we add the Kubernetes repository on your CentOS system:
sudo nano /etc/yum.repos.d/kubernetes.repo
Add following contents:
[kubernetes] name=Kubernetes baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
Then, install the necessary packages using following command:
sudo dnf install kubelet kubeadm kubectl --disableexcludes=kubernetes
After installation, enable the kubelet daemon with the command:
sudo systemctl enable --now kubelet
For the next task, you must su to the root user. Once you’ve done that, issue the command:
Add the following lines:
net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1
Finally steps, reload the configuration with the command:
Congratulation’s! You have successfully installed Kubernetes. Thanks for using this tutorial for installing Kubernetes on your CentOS 8 system. For additional help or useful information, we recommend you to check the official Kubernetes website.