Delete a NebulaGraph cluster

This topic explains how to delete a NebulaGraph cluster created using NebulaGraph Operator.

Usage limitations

• Deletion is only supported for NebulaGraph clusters created with the NebulaGraph Operator.
• You cannot delete a NebulaGraph cluster that has deletion protection enabled. For more information, see Configure deletion protection.

Delete a NebulaGraph cluster using kubectl

1. View all created clusters.

kubectl get nc --all-namespaces

Example output:

NAMESPACE   NAME      READY   GRAPHD-DESIRED   GRAPHD-READY   METAD-DESIRED   METAD-READY   STORAGED-DESIRED   STORAGED-READY   AGE
default     nebula    True    2                2              3               3             3                  3                38h
nebula      nebula2   True    1                1              1               1             1                  1                2m7s

2. Delete a cluster. For example, run the following command to delete a cluster named nebula2:

kubectl delete nc nebula2 -n nebula

Example output:

nebulacluster.nebula-graph.io "nebula2" deleted

3. Confirm the deletion.

kubectl get nc nebula2 -n nebula

Example output:

No resources found in nebula namespace.

Delete a NebulaGraph cluster using helm

1. View all Helm releases.

helm list --all-namespaces

Example output:

NAME           	NAMESPACE             	REVISION	UPDATED                                	STATUS  	CHART                	APP VERSION
nebula         	default               	1       	2023-11-06 20:16:07.913136377 +0800 CST	deployed	nebula-cluster-1.7.1 	1.7.1
nebula-operator	nebula-operator-system	3       	2023-11-06 12:06:24.742397418 +0800 CST	deployed	nebula-operator-1.7.1	1.7.1

2. View detailed information about a Helm release. For example, to view the cluster information for a Helm release named nebula:

helm get values nebula -n default

Example output:

USER-SUPPLIED VALUES:
imagePullSecrets:
- name: secret_for_pull_image
nameOverride: nebula # The cluster name
nebula:
  graphd:
    image: reg.vesoft-inc.com/xx
  metad:
    image: reg.vesoft-inc.com/xx
    licenseManagerURL: xxx:9119
  storageClassName: local-sc
  storaged:
    image: reg.vesoft-inc.com/xx
  version: v1.8.0 # The cluster version

3. Uninstall a Helm release. For example, to uninstall a Helm release named nebula:

helm uninstall nebula -n default

Example output:

release "nebula" uninstalled

Once the Helm release is uninstalled, NebulaGraph Operator will automatically remove all K8s resources associated with that release.

4. Verify that the cluster resources are removed.

kubectl get nc nebula -n default

Example output:

No resources found in default namespace.