Updated sidecar to not require VolumeSnapshotClass for snapshot deletion

pkg/sidecar-controller/content_create_test.go

@@ -163,7 +163,7 @@ func TestSyncContent(t *testing.T) {
 					SnapshotHandle: toStringPointer("sid1-6"),
 					RestoreSize:    &defaultSize,
 					ReadyToUse:     &False,
-					Error:          newSnapshotError("Failed to check and update snapshot content: failed to get input parameters to create snapshot for content content1-6: \"failed to retrieve snapshot class bad-class from the informer: \\\"volumesnapshotclass.snapshot.storage.k8s.io \\\\\\\"bad-class\\\\\\\" not found\\\"\""),
+					Error:          newSnapshotError("Failed to check and update snapshot content: failed to get input parameters to create snapshot for content content1-6: \"volumesnapshotclass.snapshot.storage.k8s.io \\\"bad-class\\\" not found\""),
 				}),
 			expectedEvents: []string{"Warning SnapshotContentCheckandUpdateFailed"},
 			expectedCreateCalls: []createCall{

pkg/sidecar-controller/snapshot_controller.go

@@ -27,6 +27,7 @@ import (
 	codes "google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/klog"
 	"k8s.io/kubernetes/pkg/util/slice"
@@ -329,7 +330,7 @@ func (ctrl *csiSnapshotSideCarController) deleteCSISnapshotOperation(content *cr
 	klog.V(5).Infof("deleteCSISnapshotOperation [%s] started", content.Name)
 
 	_, snapshotterCredentials, err := ctrl.getCSISnapshotInput(content)
-	if err != nil {
+	if err != nil && !errors.IsNotFound(err) {
 		ctrl.eventRecorder.Event(content, v1.EventTypeWarning, "SnapshotDeleteError", "Failed to get snapshot class or credentials")
 		return fmt.Errorf("failed to get input parameters to delete snapshot for content %s: %q", content.Name, err)
 	}
@@ -441,7 +442,7 @@ func (ctrl *csiSnapshotSideCarController) getSnapshotClass(className string) (*c
 	class, err := ctrl.classLister.Get(className)
 	if err != nil {
 		klog.Errorf("failed to retrieve snapshot class %s from the informer: %q", className, err)
-		return nil, fmt.Errorf("failed to retrieve snapshot class %s from the informer: %q", className, err)
+		return nil, err
 	}
 
 	return class, nil

pkg/sidecar-controller/snapshot_delete_test.go

@@ -221,10 +221,11 @@ func TestDeleteSync(t *testing.T) {
 			test:                testSyncContent,
 		},
 		{
-			name:             "1-4 - fail to delete with a snapshot class which has invalid secret parameter, bound finalizer should remain",
+			name:                "1-4 - fail to delete with a snapshot class which has invalid secret parameter, bound finalizer should remain",
-			initialContents:  newContentArrayWithDeletionTimestamp("content1-1", "snapuid1-1", "snap1-1", "sid1-1", "invalid", "", "snap1-4-volumehandle", deletionPolicy, nil, nil, true, &timeNowMetav1),
+			initialContents:     newContentArrayWithDeletionTimestamp("content1-1", "snapuid1-1", "snap1-1", "sid1-1", "invalid", "", "snap1-4-volumehandle", deletionPolicy, nil, nil, true, &timeNowMetav1),
-			expectedContents: newContentArrayWithDeletionTimestamp("content1-1", "snapuid1-1", "snap1-1", "sid1-1", "invalid", "", "snap1-4-volumehandle", deletionPolicy, nil, nil, true, &timeNowMetav1),
+			expectedContents:    newContentArrayWithDeletionTimestamp("content1-1", "snapuid1-1", "snap1-1", "sid1-1", "invalid", "", "snap1-4-volumehandle", deletionPolicy, nil, nil, true, &timeNowMetav1),
-			expectedEvents:   noevents,
+			expectedEvents:      noevents,
+			expectedDeleteCalls: []deleteCall{{"sid1-1", nil, fmt.Errorf("mock csi driver delete error")}},
 			errors: []reactorError{
 				// Inject error to the first client.VolumesnapshotV1beta1().VolumeSnapshotContents().Delete call.
 				// All other calls will succeed.
@@ -336,10 +337,9 @@ func TestDeleteSync(t *testing.T) {
 			test:                testSyncContent,
 		},
 		{
-			name:                "1-15 - (dynamic)deletion of content with no snapshotclass should produce error",
+			name:                "1-15 - (dynamic)deletion of content with no snapshotclass should succeed",
 			initialContents:     newContentArrayWithDeletionTimestamp("content1-15", "sid1-15", "snap1-15", "sid1-15", "", "", "snap1-15-volumehandle", deletePolicy, nil, &defaultSize, true, &timeNowMetav1),
 			expectedContents:    newContentArrayWithDeletionTimestamp("content1-15", "sid1-15", "snap1-15", "sid1-15", "", "", "snap1-15-volumehandle", deletePolicy, nil, &defaultSize, true, &timeNowMetav1),
-			expectedEvents:      []string{"Warning SnapshotDeleteError"},
 			errors:              noerrors,
 			expectedDeleteCalls: []deleteCall{{"sid1-15", nil, nil}},
 			test:                testSyncContent,