Merge pull request #2029 from k8s-infra-cherrypick-robot/cherry-pick-2028-to-release-1.17

[release-1.17] fix outdated metadata error in watcher

Author: k8s-ci-robot

pkg/gce-pd-csi-driver/cache.go

@@ -641,6 +641,14 @@ func watchDiskDetaches(watcher *fsnotify.Watcher, nodeName string, errorCh chan
 		case event := <-watcher.Events:
 			// In case of an event i.e. creation or deletion of any new PV, we update the VG metadata.
 			// This might include some non-LVM changes, no harm in updating metadata multiple times.
+			args := []string{
+				"--updatemetadata",
+				getVolumeGroupName(nodeName),
+			}
+			_, err := common.RunCommand("" /* pipedCmd */, nil /* pipedCmdArg */, "vgck", args...)
+			if err != nil {
+				klog.Errorf("Error updating volume group's metadata: %v", err)
+			}
 			reduceVolumeGroup(getVolumeGroupName(nodeName), true)
 			klog.V(2).Infof("disk attach/detach event %#v\n", event)
 		}