1 files changed, 16 insertions, 13 deletions
diff --git a/weed/wdclient/masterclient.go b/weed/wdclient/masterclient.go
index b26853945..3600fe7c7 100644
--- a/weed/wdclient/masterclient.go
+++ b/weed/wdclient/masterclient.go
@@ -3,29 +3,32 @@ package wdclient
 import (
 	"context"
 	"fmt"
+	"math/rand"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
-	"math/rand"
+	"google.golang.org/grpc"
 )
 
 type MasterClient struct {
-	ctx           context.Context
-	name          string
-	currentMaster string
-	masters       []string
+	ctx            context.Context
+	name           string
+	currentMaster  string
+	masters        []string
+	grpcDialOption grpc.DialOption
 
 	vidMap
 }
 
-func NewMasterClient(ctx context.Context, clientName string, masters []string) *MasterClient {
+func NewMasterClient(ctx context.Context, grpcDialOption grpc.DialOption, clientName string, masters []string) *MasterClient {
 	return &MasterClient{
-		ctx:     ctx,
-		name:    clientName,
-		masters: masters,
-		vidMap:  newVidMap(),
+		ctx:            ctx,
+		name:           clientName,
+		masters:        masters,
+		grpcDialOption: grpcDialOption,
+		vidMap:         newVidMap(),
 	}
 }
 
@@ -50,7 +53,7 @@ func (mc *MasterClient) KeepConnectedToMaster() {
 func (mc *MasterClient) tryAllMasters() {
 	for _, master := range mc.masters {
 		glog.V(0).Infof("Connecting to master %v", master)
-		gprcErr := withMasterClient(master, func(client master_pb.SeaweedClient) error {
+		gprcErr := withMasterClient(master, mc.grpcDialOption, func(client master_pb.SeaweedClient) error {
 
 			stream, err := client.KeepConnected(context.Background())
 			if err != nil {
@@ -96,14 +99,14 @@ func (mc *MasterClient) tryAllMasters() {
 	}
 }
 
-func withMasterClient(master string, fn func(client master_pb.SeaweedClient) error) error {
+func withMasterClient(master string, grpcDialOption grpc.DialOption, fn func(client master_pb.SeaweedClient) error) error {
 
 	masterGrpcAddress, parseErr := util.ParseServerToGrpcAddress(master, 0)
 	if parseErr != nil {
 		return fmt.Errorf("failed to parse master grpc %v", master)
 	}
 
-	grpcConnection, err := util.GrpcDial(masterGrpcAddress)
+	grpcConnection, err := util.GrpcDial(masterGrpcAddress, grpcDialOption)
 	if err != nil {
 		return fmt.Errorf("fail to dial %s: %v", master, err)
 	}