Update cloud providers

pkg/volume/aws_ebs/aws_util.go

@@ -49,6 +49,8 @@ func (util *AWSDiskUtil) DeleteVolume(d *awsElasticBlockStoreDeleter) error {
 
 	deleted, err := cloud.DeleteDisk(d.volumeID)
 	if err != nil {
+		// AWS cloud provider returns volume.deletedVolumeInUseError when
+		// necessary, no handling needed here.
 		glog.V(2).Infof("Error deleting EBS Disk volume %s: %v", d.volumeID, err)
 		return err
 	}

pkg/volume/cinder/cinder_util.go

@@ -124,6 +124,8 @@ func (util *CinderDiskUtil) DeleteVolume(cd *cinderVolumeDeleter) error {
 	}
 
 	if err = cloud.DeleteVolume(cd.pdName); err != nil {
+		// OpenStack cloud provider returns volume.tryAgainError when necessary,
+		// no handling needed here.
 		glog.V(2).Infof("Error deleting cinder volume %s: %v", cd.pdName, err)
 		return err
 	}

pkg/volume/gce_pd/gce_util.go

@@ -60,6 +60,8 @@ func (util *GCEDiskUtil) DeleteVolume(d *gcePersistentDiskDeleter) error {
 
 	if err = cloud.DeleteDisk(d.pdName); err != nil {
 		glog.V(2).Infof("Error deleting GCE PD volume %s: %v", d.pdName, err)
+		// GCE cloud provider returns volume.deletedVolumeInUseError when
+		// necessary, no handling needed here.
 		return err
 	}
 	glog.V(2).Infof("Successfully deleted GCE PD volume %s", d.pdName)