mount: add a bit retry when connecting to filer during startup

weed/command/mount_std.go

@@ -63,6 +63,7 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 	// try to connect to filer, filerBucketsPath may be useful later
 	grpcDialOption := security.LoadClientTLS(util.GetViper(), "grpc.client")
 	var cipher bool
+	for i := 0; i < 10; i++ {
 		err = pb.WithGrpcFilerClient(filerGrpcAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
 			resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
 			if err != nil {
@@ -72,7 +73,13 @@ func RunMount(option *MountOptions, umask os.FileMode) bool {
 			return nil
 		})
 		if err != nil {
-		glog.Infof("failed to talk to filer %s: %v", filerGrpcAddress, err)
+			glog.V(0).Infof("failed to talk to filer %s: %v", filerGrpcAddress, err)
+			glog.V(0).Infof("wait for %d seconds ...", i+1)
+			time.Sleep(time.Duration(i+1)*time.Second)
+		}
+	}
+	if err != nil {
+		glog.Errorf("failed to talk to filer %s: %v", filerGrpcAddress, err)
 		return true
 	}