Merge pull request #51 from ceph/devel

Sync rhs/ceph-csi:devel with ceph/ceph-csi:devel

internal/rbd/errors.go

@@ -42,4 +42,6 @@ var (
 	ErrMissingImageNameInVolID = errors.New("rbd image name information can not be empty in volID")
 	// ErrDecodeClusterIDFromMonsInVolID is returned when mons hash decoding on migration volID.
 	ErrDecodeClusterIDFromMonsInVolID = errors.New("failed to get clusterID from monitors hash in volID")
+	// ErrUnHealthyMirroredImage is returned when mirrored image is not healthy.
+	ErrUnHealthyMirroredImage = errors.New("mirrored image is not healthy")
 )

internal/rbd/replicationcontrollerserver.go

@@ -43,6 +43,9 @@ const (
 	// imageMirrorModeSnapshot uses snapshots to propagate RBD images between
 	// ceph clusters.
 	imageMirrorModeSnapshot imageMirroringMode = "snapshot"
+	// imageMirrorModeJournal uses journaling to propagate RBD images between
+	// ceph clusters.
+	imageMirrorModeJournal imageMirroringMode = "journal"
 )
 
 const (
@@ -123,6 +126,8 @@ func getMirroringMode(ctx context.Context, parameters map[string]string) (librbd
 	switch imageMirroringMode(val) {
 	case imageMirrorModeSnapshot:
 		mirroringMode = librbd.ImageMirrorModeSnapshot
+	case imageMirrorModeJournal:
+		mirroringMode = librbd.ImageMirrorModeJournal
 	default:
 		return mirroringMode, status.Errorf(codes.InvalidArgument, "%s %s not supported", imageMirroringKey, val)
 	}
@@ -133,12 +138,24 @@ func getMirroringMode(ctx context.Context, parameters map[string]string) (librbd
 // validateSchedulingDetails gets the mirroring mode and scheduling details from the
 // input GRPC request parameters and validates the scheduling is only supported
 // for snapshot mirroring mode.
-func validateSchedulingDetails(parameters map[string]string) error {
+func validateSchedulingDetails(ctx context.Context, parameters map[string]string) error {
 	var err error
 
 	val := parameters[imageMirroringKey]
 
 	switch imageMirroringMode(val) {
+	case imageMirrorModeJournal:
+		// journal mirror mode does not require scheduling parameters
+		if _, ok := parameters[schedulingIntervalKey]; ok {
+			log.WarningLog(ctx, "%s parameter cannot be used with %s mirror mode, ignoring it",
+				schedulingIntervalKey, string(imageMirrorModeJournal))
+		}
+		if _, ok := parameters[schedulingStartTimeKey]; ok {
+			log.WarningLog(ctx, "%s parameter cannot be used with %s mirror mode, ignoring it",
+				schedulingStartTimeKey, string(imageMirrorModeJournal))
+		}
+
+		return nil
 	case imageMirrorModeSnapshot:
 	// If mirroring mode is not set in parameters, we are defaulting mirroring
 	// mode to snapshot. Discard empty mirroring mode from validation as it is
@@ -206,7 +223,7 @@ func (rs *ReplicationServer) EnableVolumeReplication(ctx context.Context,
 	}
 	defer cr.DeleteCredentials()
 
-	err = validateSchedulingDetails(req.GetParameters())
+	err = validateSchedulingDetails(ctx, req.GetParameters())
 	if err != nil {
 		return nil, err
 	}
@@ -325,9 +342,11 @@ func tickleMirroringOnDummyImage(rbdVol *rbdVolume, mirroringMode librbd.ImageMi
 		return err
 	}
 
-	err = dummyVol.addSnapshotScheduling(admin.Interval("1m"), admin.NoStartTime)
-	if err != nil {
-		return err
+	if mirroringMode == librbd.ImageMirrorModeSnapshot {
+		err = dummyVol.addSnapshotScheduling(admin.Interval("1m"), admin.NoStartTime)
+		if err != nil {
+			return err
+		}
 	}
 
 	return nil
@@ -517,6 +536,11 @@ func (rs *ReplicationServer) PromoteVolume(ctx context.Context,
 		}
 	}
 
+	err = checkHealthyPrimary(ctx, rbdVol)
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
 	var mode librbd.ImageMirrorMode
 	mode, err = getMirroringMode(ctx, req.GetParameters())
 	if err != nil {
@@ -546,6 +570,35 @@ func (rs *ReplicationServer) PromoteVolume(ctx context.Context,
 	return &replication.PromoteVolumeResponse{}, nil
 }
 
+// checkHealthyPrimary checks if the image is a healhty primary or not.
+// healthy primary image will be in up+stopped state, for states other
+// than this it returns an error message.
+func checkHealthyPrimary(ctx context.Context, rbdVol *rbdVolume) error {
+	mirrorStatus, err := rbdVol.getImageMirroringStatus()
+	if err != nil {
+		return err
+	}
+	localStatus, err := mirrorStatus.LocalStatus()
+	if err != nil {
+		// LocalStatus can fail if the local site status is not found in
+		// mirroring status. Log complete sites status to debug why getting
+		// local status failed
+		log.ErrorLog(ctx, "mirroring status is %+v", mirrorStatus)
+
+		return fmt.Errorf("failed to get local status: %w", err)
+	}
+
+	if !localStatus.Up && localStatus.State != librbd.MirrorImageStatusStateStopped {
+		return fmt.Errorf("%s %w. State is up=%t, state=%q",
+			rbdVol,
+			ErrUnHealthyMirroredImage,
+			localStatus.Up,
+			localStatus.State)
+	}
+
+	return nil
+}
+
 // DemoteVolume extracts the RBD volume information from the
 // volumeID, If the image is present, mirroring is enabled and the
 // image is in promoted state it will demote the volume as secondary.

internal/rbd/replicationcontrollerserver_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package rbd
 
 import (
+	"context"
 	"reflect"
 	"testing"
 
@@ -73,6 +74,7 @@ func TestValidateSchedulingInterval(t *testing.T) {
 
 func TestValidateSchedulingDetails(t *testing.T) {
 	t.Parallel()
+	ctx := context.TODO()
 	tests := []struct {
 		name       string
 		parameters map[string]string
@@ -98,10 +100,10 @@ func TestValidateSchedulingDetails(t *testing.T) {
 		{
 			"when mirroring mode is journal",
 			map[string]string{
-				imageMirroringKey:     "journal",
+				imageMirroringKey:     string(imageMirrorModeJournal),
 				schedulingIntervalKey: "1h",
 			},
-			true,
+			false,
 		},
 		{
 			"when startTime is specified without interval",
@@ -136,7 +138,7 @@ func TestValidateSchedulingDetails(t *testing.T) {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			t.Parallel()
-			err := validateSchedulingDetails(tt.parameters)
+			err := validateSchedulingDetails(ctx, tt.parameters)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("getSchedulingDetails() error = %v, wantErr %v", err, tt.wantErr)