diff --git a/pkg/apiserver/cubeapi/k8s/proxy.go b/pkg/apiserver/cubeapi/k8s/proxy.go
index 2e4e6a560..1cc271b2c 100644
--- a/pkg/apiserver/cubeapi/k8s/proxy.go
+++ b/pkg/apiserver/cubeapi/k8s/proxy.go
@@ -1,3 +1,19 @@
+/*
+Copyright 2023 KubeCube Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package k8s
 
 import (
diff --git a/pkg/multicluster/client/config/config.go b/pkg/multicluster/client/config/config.go
index 1991c4470..f608d2697 100644
--- a/pkg/multicluster/client/config/config.go
+++ b/pkg/multicluster/client/config/config.go
@@ -1,3 +1,19 @@
+/*
+Copyright 2023 KubeCube Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 package config
 
 type Config struct {
diff --git a/pkg/warden/warden.go b/pkg/warden/warden.go
index 480d9de2a..2013c6071 100644
--- a/pkg/warden/warden.go
+++ b/pkg/warden/warden.go
@@ -143,7 +143,7 @@ func (w *Warden) Run(stop <-chan struct{}) {
 
 // makePivotClient make client for pivot client
 func makePivotClient(opts *Config) (multiclient.Client, error) {
-	cfg := &restclient.Config{}
+	var cfg *restclient.Config
 	var err error
 	if len(opts.PivotClusterKubeConfig) != 0 {
 		cfg, err = clientcmd.BuildConfigFromFlags("", opts.PivotClusterKubeConfig)