Remove a Member Cluster

This tutorial demonstrates how to remove a member cluster on the KubeSphere web console.

Prerequisites

• You have enabled multi-cluster management.
• You need a user granted a role including the authorization of Cluster Management. For example, you can log in to the console as admin directly or create a new role with the authorization and assign it to a user.

Remove a Cluster

You can remove a cluster by using either of the following methods:

Method 1

1. Click Platform in the upper-left corner and select Cluster Management.

2. In the Member Clusters area, click on the right of the the cluster that you want to remove from the control plane, and then click Remove Cluster.

3. In the Remove Cluster dialog box that is displayed, read the risk alert carefully. If you still want to proceed, enter the name of the member cluster, and click OK.

Method 2

1. Click Platform in the upper-left corner and select Cluster Management.

2. In the Member Clusters area, click the name of the member cluster that you want to remove from the control plane.

3. In the navigation tree on the left, select Cluster Settings > Basic Information.

4. In the Cluster Information area, click Manage > Remove Cluster.

5. In the Remove Cluster dialog box that is displayed, read the risk alert carefully. If you still want to proceed, enter the name of the member cluster, and click OK.

   Warning

   • After the member cluster has been removed, existing resources of the removed member cluster will not be automatically cleaned up.

   • After the member cluster has been removed, multi-cluster configuration data of the removed member cluster will not be automatically cleaned up, which results in data loss when you uninstall KubeSphere or delete associated resources.

6. Run the following command to clean up multi-cluster configuration data of the removed member cluster:

   for ns in $(kubectl get ns --field-selector status.phase!=Terminating -o jsonpath='{.items[*].metadata.name}'); do kubectl label ns $ns kubesphere.io/workspace- && kubectl patch ns $ns --type merge -p '{"metadata":{"ownerReferences":[]}}'; done
   

Remove an Unhealthy Cluster

On some occasions, you cannot remove a cluster by following the steps above. For example, you import a cluster with the wrong credentials, and you cannot access Cluster Settings. In this case, execute the following command to remove an unhealthy cluster:

kubectl delete cluster <cluster name>

Thanks for the feedback. If you have a specific question about how to use KubeSphere, ask it on Slack. Open an issue in the GitHub repo if you want to report a problem or suggest an improvement.