Kubernetes is a popular open-source platform that automates container deployment, scaling, and management. It provides a flexible and robust environment for running modern applications. Rancher, on the other hand, is a container management platform that makes it easier to deploy, manage, and monitor Kubernetes clusters.
In this article, we will go through the steps involved in setting up a Kubernetes cluster with Rancher.
Prerequisites
Before we begin, make sure you have the following:
- A Linux or macOS machine with Docker installed.
- A Kubernetes cluster with at least one worker node.
- A Rancher server installation.
Step 1: Install Rancher on the Master Node
The first step in setting up a Kubernetes cluster with Rancher is to install Rancher on the master node. You can do this by running the following command:
$ sudo docker run -d --restart=unless-stopped -p 80:80 -p 443:443 rancher/rancher:latest
This will download and run the latest version of Rancher.
Step 2: Add a Cluster to Rancher
After installing Rancher, you need to add a cluster to it. To do this, follow these steps:
- Open the Rancher UI in your web browser by navigating to
https://<RANCHER_SERVER_IP>. - Click on the "Add Cluster" button in the Clusters section.
- Choose the type of cluster you want to add. In this case, select "Custom".
- Enter a name for the cluster and click "Create".
Step 3: Generate a Token
To add a worker node to the cluster, you need to generate a token. To do this, follow these steps:
- Click on the cluster you just created in the Clusters section.
- Click on the "Add Node" button in the Nodes section.
- Choose the type of node you want to add. In this case, select "Custom".
- Click on the "Generate" button next to the Token field.
Step 4: Join the Worker Node to the Cluster
Now that you have generated a token, you can use it to join the worker node to the cluster. To do this, run the following command on the worker node:
$ sudo docker run -d --privileged --restart=unless-stopped \
-v /var/run/docker.sock:/var/run/docker.sock \
rancher/rancher-agent:<RANCHER_VERSION> \
--server https://<RANCHER_SERVER_IP> \
--token <TOKEN> \
--ca-checksum <CA_CHECKSUM>
Make sure to replace <RANCHER_VERSION>, <RANCHER_SERVER_IP>, <TOKEN>, and <CA_CHECKSUM> with the appropriate values.
Step 5: Verify the Cluster
After adding the worker node to the cluster, you can verify that it is working correctly. To do this, follow these steps:
- Click on the cluster you just created in the Clusters section.
- Click on the "Nodes" tab.
- Verify that the worker node you just added is listed and has a status of "Active".
Congratulations! You have successfully set up a Kubernetes cluster with Rancher.
Setting up a Kubernetes cluster with Rancher is a straightforward process. By following the steps outlined in this article, you can easily deploy and manage a Kubernetes cluster with Rancher. We hope you found this article helpful.
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