OADP-1002: Ignore not found err for temp vsclass in cases of data mov…

…er without PVC (#215)

pkg/datamover/datamover.go

@@ -14,6 +14,7 @@ import (
 	"github.com/pkg/errors"
 	velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
 	"golang.org/x/sync/errgroup"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/wait"
 	kbclient "sigs.k8s.io/controller-runtime/pkg/client"
@@ -137,6 +138,12 @@ func DeleteTempVSClass(backupName string, tempVS snapshotv1listers.VolumeSnapsho
 	tempVSClassName := fmt.Sprintf("%s-snapclass", backupName)
 	tempVSClass, err := tempVS.Get(tempVSClassName)
 	if err != nil {
+		// ignore is not found err as it is possible to create data mover
+		// backup without an existing PVC
+		// in which case this VSClass will not exist
+		if apierrors.IsNotFound(err) {
+			return nil
+		}
 		log.Errorf("failed to get temp vsClass %v", tempVSClassName)
 		return err
 	}