Rancher is a popular open-source platform that simplifies the deployment and management of Kubernetes clusters. It provides a user-friendly interface for managing containers, deploying applications, and managing workloads. In this article, we will guide you through the process of installing Rancher on CentOS 8.
Step 1: Update the System
Before installing Rancher, it is recommended to update the system packages to ensure that we have the latest version of all packages. Open a terminal and run the following command to update the system:
sudo dnf update -y
Step 2: Install Docker
Rancher requires Docker to be installed on the system. Run the following commands to install Docker on CentOS 8:
sudo dnf install -y yum-utils
sudo yum-config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
sudo dnf install docker-ce docker-ce-cli containerd.io -y
After installing Docker, start the Docker service and enable it to start at boot time:
sudo systemctl start docker
sudo systemctl enable docker
Step 3: Install Rancher
After installing Docker, we can proceed with the installation of Rancher. Run the following command to download and install the Rancher server container:
sudo docker run -d --restart=unless-stopped -p 80:80 -p 443:443 rancher/rancher:latest
The above command will download and install the Rancher server container and map the ports 80 and 443 to the host system.
Step 4: Accessing Rancher Web Interface
After installing Rancher, we can access its web interface by opening a web browser and navigating to the URL https://<your-server-ip>. Replace <your-server-ip> with the IP address of your CentOS 8 system. You will be prompted to set up an admin password for Rancher. Once you set up the password, you will be redirected to the Rancher dashboard.
Step 5: Adding a Kubernetes Cluster to Rancher
Once you are logged in to the Rancher dashboard, you can add a Kubernetes cluster to Rancher. Click on the "Add Cluster" button and choose the type of cluster you want to add. You can add a custom cluster or choose from the pre-configured options.
If you choose to add a custom cluster, you will be prompted to enter the cluster details such as the cluster name, Kubernetes version, and other configuration options. Once you enter the details, click on the "Create" button to create the cluster.
Step 6: Managing Kubernetes Clusters with Rancher
After adding the Kubernetes cluster to Rancher, you can use the Rancher web interface to manage the cluster. You can deploy applications, manage workloads, and monitor the cluster health from the Rancher dashboard.
In this article, we have explained the process of installing Rancher on CentOS 8. We have also shown how to add a Kubernetes cluster to Rancher and manage the cluster using the Rancher web interface. We hope this article has been helpful in getting started with Rancher.
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