ws-manager: remove PVC object if the workspace pod fails to up

Remove the PVC object if the stop workspace request.
The PVC object removal is postponed until the PVC is no longer actively
used by the workspace pod.

Signed-off-by: JenTing Hsiao <hsiaoairplane@gmail.com>

components/ws-manager/pkg/manager/monitor.go

@@ -300,6 +300,18 @@ func actOnPodEvent(ctx context.Context, m actingManager, manager *Manager, statu
 			return xerrors.Errorf("cannot stop workspace: %w", err)
 		}
 
+		// Delete PVC if it exists
+		// Note that: the PVC removal is postponed until the PVC is no longer actively used by its workspace pod.
+		//            Therefore, the PVC is removed after the workspace pod finalizer is removed.
+		//            No data loss unless we remove the workspace pod finalizer incorrectly.
+		_, createPVC := pod.Labels[pvcWorkspaceFeatureLabel]
+		if !createPVC {
+			return nil
+		}
+		err = manager.deleteWorkspacePVC(ctx, pod.Name)
+		if err != nil {
+			return xerrors.Errorf("cannot remove PVC: %w", err)
+		}
 		return nil
 	} else if status.Conditions.StoppedByRequest == api.WorkspaceConditionBool_TRUE {
 		span.LogKV("event", "stopped by request")