Deleting a Node

The Kube-OVN-Controller running on a node periodically reconnects to the ovn-sb, but the chassis still registers again. As a result, some network configurations are residual, resources are wasted, and potential rule conflicts may occur. Therefore, when deleting a node from Kubernetes, perform the following steps to ensure that network information can be properly deleted.

1. Drain a node.

   1	kubectl drain <node-name> --ignore-daemonsets --force

2. Log in to the node and stop kubelet and Docker to stop the corresponding DaemonSet.

   1	systemctl stop kubelet && systemctl stop docker

3. Delete the node from the master nodes.

   1	kubectl delete node <node-name>

4. Check whether the node is deleted from the ovn-sb.

   1	kubectl ko sbctl show

5. If any chassis corresponding to the hostname still exists, manually delete it.

   1	kubectl ko sbctl chassis-del <chassis-uuid>