fix: allow deleting orphans while retaining the data

check for DeleteCustomResourceOnly label in orphan
if label is set to true, skip data cleaning

ref#11286

Signed-off-by: Nina Zhan <[email protected]>

Author: nzhan126

controller/orphan_controller.go

@@ -623,6 +623,14 @@ func (oc *OrphanController) updateDataCleanableCondition(orphan *longhorn.Orphan
 		reason = oc.checkOrphanedReplicaDataCleanable(node, orphan)
 	}
 
+	exist, err := datastore.IsLabelLonghornDeleteCustomResourceOnlyExisting(orphan)
+	if err != nil {
+		return errors.Wrapf(err, "failed to check if the label longhorn.io/delete-custom-resource-only exists")
+	}
+	if exist {
+		reason = longhorn.OrphanConditionTypeDataCleanableReasonSkipped
+	}
+
 	return nil
 }
 

k8s/pkg/apis/longhorn/v1beta2/orphan.go

@@ -20,6 +20,7 @@ const (
 	OrphanConditionTypeDataCleanableReasonDiskInvalid     = "DiskInvalid"
 	OrphanConditionTypeDataCleanableReasonDiskEvicted     = "DiskEvicted"
 	OrphanConditionTypeDataCleanableReasonDiskChanged     = "DiskChanged"
+	OrphanConditionTypeDataCleanableReasonSkipped         = "Skipped"
 )
 
 const (