In this short article we will learn how to install Rancher on CentOS 8 operating system.
In the ever-evolving landscape of container orchestration and management, Rancher stands out as a robust solution that empowers organizations to streamline their containerized applications. This article explores the key features and benefits of Rancher, shedding light on why it has become a go-to platform for DevOps teams worldwide.
What Is Rancher ?
Rancher is an open-source container management platform that simplifies the deployment and orchestration of containers at scale. It provides a user-friendly interface and supports popular container orchestration tools like Kubernetes and Docker Swarm.
Key Features of Rancher
- Multi-Cluster Management
Rancher excels in managing multiple Kubernetes clusters seamlessly. It allows users to oversee and control diverse clusters from a centralized dashboard, facilitating efficient resource allocation and workload distribution.
- Intuitive User Interface
One of Rancher’s strengths is its user-friendly interface. Whether you’re a seasoned DevOps professional or a newcomer to containerization, Rancher’s intuitive design makes it easy to navigate and manage containers effortlessly.
- Catalog of Applications
Rancher simplifies the deployment of applications through its extensive catalog. Users can choose from a variety of pre-configured applications, reducing the complexity of setting up and maintaining containers.
Benefits of Using Rancher
- Enhanced Productivity
By providing a centralized platform for managing containers, Rancher boosts team productivity. It streamlines workflows, reduces manual interventions, and accelerates the development lifecycle.
- Scalability and Flexibility
Rancher adapts to the dynamic needs of your business. Whether you’re dealing with a small-scale project or a large enterprise-level deployment, Rancher scales effortlessly, ensuring optimal performance.
- Robust Security Features
Security is paramount in containerized environments. Rancher integrates robust security measures, including role-based access control (RBAC) and a secure communication framework, to safeguard your applications and data.
How To Install Rancher On CentOS 8
This section provides step-by-step instructions on installing Rancher. Include prerequisites, supported platforms, and any additional considerations for a smooth setup. Installing Rancher on CentOS 8 involves a few steps, including setting up a supported Kubernetes cluster and then deploying Rancher as a containerized application. Here’s a step-by-step guide:
- A CentOS 8 server with Docker installed.
- Kubernetes cluster (you can use tools like k3s, kubeadm, or others to set up a lightweight cluster).
kubectl command-line tool installed on your CentOS server.
Step 1: Install Docker on CentOS 8
The first step is install Docker on CentOS 8 operating system. The Docker installation process is show below :
$ sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo $ sudo dnf install docker-ce --nobest -y $ sudo systemctl start docker $ sudo systemctl enable docker
Step 2: Set up a Kubernetes Cluster
We can choose a tool like k3s for a lightweight cluster. Follow the k3s installation instructions from the official website: https://k3s.io/.
$ curl -sfL https://get.k3s.io | sh -
Step 3: Install kubectl on CentOS 8
$ sudo dnf install kubectl -y
Step 4: Deploy Rancher
Once you have your Kubernetes cluster ready, you can deploy Rancher as a Helm chart.
Add the Helm repository:
$ sudo kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.1.0/cert-manager.crds.yaml $ sudo helm repo add rancher-stable https://releases.rancher.com/server-charts/stable $ sudo helm repo update
$ kubectl create namespace cert-manager $ helm install cert-manager rancher-stable/cert-manager --namespace cert-manager --version v1.1.0
Create a namespace for Rancher:
$ kubectl create namespace cattle-system
Install Rancher using Helm:
$ helm install rancher rancher-stable/rancher --namespace cattle-system --set hostname=rancher.bckinfo.com
Step 5: Access Rancher
Wait for the Rancher deployment to finish. You can check the status using:
$ kubectl -n cattle-system rollout status deploy/rancher
Once the deployment is complete, access Rancher through your web browser using the hostname you specified:
We will be prompted to set up the admin password. After that, you can log in and start managing your Kubernetes clusters using Rancher.
In conclusion, Rancher stands out as a powerful tool in the world of container management. Its user-friendly interface, comprehensive features, and scalability make it an ideal choice for organizations looking to optimize their containerized workflows. Embrace Rancher, and unlock the full potential of your containerized applications.