Remove a Kubernetes Node¶

This section describes how to remove a Kubernetes Node from your MCP cluster.

To remove a Kubernetes Node:

1. Log in to the Kubernetes Node that you want to remove.

2. Stop and disable the salt-minion service on this node:

   systemctl stop salt-minion
   systemctl disable salt-minion
   

3. Log in to the Salt Master node.

4. Verify that the node name is not registered in salt-key. If the node is present, remove it:

   salt-key | grep <node_name><NUM>
   salt-key -d <node_name><NUM>.domain_name
   

5. Log in to any Kubernetes Master node.

6. Mark the Node as unschedulable to prevent new pods from being assigned to it:

   kubectl cordon <node_ID>
   kubectl drain <node_ID>
   

7. Remove the Kubernetes Node:

   kubectl delete node cmp<node_ID>
   

   Wait until the workloads are gracefully deleted and the Kubernetes Node is removed.

8. Verify that the node is absent in the Kubernetes Nodes list:

   kubectl get nodes
   

9. Open your Git project repository with Reclass model on the cluster level.

10. In infra/config.yml, remove the definition of the Kubernetes Node in question under the reclass:storage:node pillar.

11. Log in to the Kubernetes Node in question.

12. Run the following commands:

    systemctl stop kubelet
    systemctl disable kubelet