diff --git a/cluster/loadbalance/round_robin.go b/cluster/loadbalance/round_robin.go
index 6b3a46cc2da06d82658c2042205985d9016ef11c..bce4ebdad4b4288e9ac8a481e7b81c19e753af69 100644
--- a/cluster/loadbalance/round_robin.go
+++ b/cluster/loadbalance/round_robin.go
@@ -1,3 +1,16 @@
+//
+// 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 loadbalance
 
 import (
diff --git a/cluster/loadbalance/round_robin_test.go b/cluster/loadbalance/round_robin_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..d5fb84e3d4cf300c58539d293468e49993ce6ac2
--- /dev/null
+++ b/cluster/loadbalance/round_robin_test.go
@@ -0,0 +1 @@
+package loadbalance