How to Install and Set Up Kubernetes on CentOS with Minikube

How to Install Kubernetes on CentOS with Minikube

Kubernetes is a powerful open-source platform designed to manage containerized applications. By using Minikube, developers can easily create a local Kubernetes cluster on CentOS to test configurations and experiment with different features. This guide walks you through the process of installing Kubernetes on CentOS with Minikube, helping you set up your local development environment.

Step 1: Update the System before to install Kubernetes on CentOS

To avoid compatibility issues during installation, it’s important to update your CentOS system. This ensures that all repositories are up to date before downloading any software.

Run the following command to update your system’s repository:

sudo yum -y update

Step 2: Install the KVM Hypervisor

Minikube runs a Kubernetes cluster inside a virtual machine (VM), so we need to install a hypervisor for virtualization. The KVM (Kernel-based Virtual Machine) hypervisor is a popular choice for this purpose.

1. Install Required Packages:
   Start by installing the necessary packages for virtualization: sudo yum install epel-release -y sudo yum install libvirt qemu-kvm virt-install virt-top libguestfs-tools bridge-utils -y
2. Start and Enable Libvirtd Service:
   Next, activate and enable the libvirtd service: sudo systemctl start libvirtd sudo systemctl enable libvirtd
3. Verify the Service is Running:
   Check if the virtualization service is active: systemctl status libvirtd
4. Add User to the Libvirt Group:
   To interact with virtualization services, add your user to the libvirt group: sudo usermod -a -G libvirt $(whoami)
5. Configure Libvirt Settings:
   Open the libvirt configuration file and ensure the following lines are set: sudo vi /etc/libvirt/libvirtd.conf Set the following values: unix_sock_group = "libvirt" unix_sock_rw_perms = "0770"
6. Restart the Service:
   After making changes to the configuration file, restart the service: sudo systemctl restart libvirtd.service

Step 3: Install Minikube

With the virtualization environment set up, the next step is to install Minikube.

1. Install Wget:
   Install wget, a tool used to download files from the web: sudo yum -y install wget
2. Download Minikube:
   Use wget to download the latest Minikube release: wget https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
3. Make Minikube Executable:
   Grant executable permissions to the Minikube binary: chmod +x minikube-linux-amd64
4. Move the Binary to the Bin Directory:
   Move the Minikube binary to /usr/local/bin/ for easier access: sudo mv minikube-linux-amd64 /usr/local/bin/minikube
5. Verify the Installation:
   Confirm that Minikube has been installed by checking its version: minikube version You should see output similar to: minikube version: v1.19.0

Step 4: Install Kubectl

Along with Minikube, you need kubectl, the command-line tool for managing Kubernetes clusters.

1. Download Kubectl:
   Run the following command to download the latest stable version of kubectl: curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl
2. Make Kubectl Executable:
   Grant execution permissions to the kubectl binary: chmod +x kubectl
3. Move Kubectl to Bin Directory:
   Move the kubectl binary to /usr/local/bin/: sudo mv kubectl /usr/local/bin/
4. Verify the Installation:
   Check if kubectl was installed successfully: kubectl version --client -o json You should see a response similar to: { "clientVersion": { "major": "1", "minor": "21", "gitVersion": "v1.21.0" } }

Step 5: Start Kubernetes with Minikube

After installing Minikube and kubectl, you can now start the Kubernetes cluster locally.

To launch the Minikube VM and start the Kubernetes cluster, run:

minikube start

Working with Kubernetes Locally

Once Minikube is running, you can begin working with Kubernetes locally. Minikube provides a low-resource way to experiment with Kubernetes deployments, services, and other configurations, making it ideal for developers who need a testing environment without the overhead of a full Kubernetes cluster.

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Conclusion on installing Kubernetes on CentOS using Minikube

By following these steps, you can set up a Kubernetes cluster on CentOS using Minikube, allowing you to test configurations and develop locally. As your Kubernetes projects grow, consider leveraging ZippyOPS to streamline your DevOps processes, optimize your cloud infrastructure, and enhance security.

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