diff --git a/pkg/metricsproxy/counterVec.go b/pkg/metricsproxy/countervec.go
similarity index 98%
rename from pkg/metricsproxy/counterVec.go
rename to pkg/metricsproxy/countervec.go
index 879ce4d9a5..f767e3b4b3 100644
--- a/pkg/metricsproxy/counterVec.go
+++ b/pkg/metricsproxy/countervec.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (
diff --git a/pkg/metricsproxy/counterVec_test.go b/pkg/metricsproxy/countervec_test.go
similarity index 97%
rename from pkg/metricsproxy/counterVec_test.go
rename to pkg/metricsproxy/countervec_test.go
index 02cc5a05cb..89dfe5743c 100644
--- a/pkg/metricsproxy/counterVec_test.go
+++ b/pkg/metricsproxy/countervec_test.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (
diff --git a/pkg/metricsproxy/gaugeVec.go b/pkg/metricsproxy/gaugevec.go
similarity index 98%
rename from pkg/metricsproxy/gaugeVec.go
rename to pkg/metricsproxy/gaugevec.go
index 2fcb5a4ec5..105b97f205 100644
--- a/pkg/metricsproxy/gaugeVec.go
+++ b/pkg/metricsproxy/gaugevec.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (
diff --git a/pkg/metricsproxy/gaugeVec_test.go b/pkg/metricsproxy/gaugevec_test.go
similarity index 97%
rename from pkg/metricsproxy/gaugeVec_test.go
rename to pkg/metricsproxy/gaugevec_test.go
index 8f42b911be..8b48467f1e 100644
--- a/pkg/metricsproxy/gaugeVec_test.go
+++ b/pkg/metricsproxy/gaugevec_test.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (
diff --git a/pkg/metricsproxy/histogramVec.go b/pkg/metricsproxy/histogramvec.go
similarity index 98%
rename from pkg/metricsproxy/histogramVec.go
rename to pkg/metricsproxy/histogramvec.go
index a7a3c2a433..a8c0b58f7f 100644
--- a/pkg/metricsproxy/histogramVec.go
+++ b/pkg/metricsproxy/histogramvec.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (
diff --git a/pkg/metricsproxy/histogramVec_test.go b/pkg/metricsproxy/histogramvec_test.go
similarity index 97%
rename from pkg/metricsproxy/histogramVec_test.go
rename to pkg/metricsproxy/histogramvec_test.go
index ad2c65b5aa..ae990829f8 100644
--- a/pkg/metricsproxy/histogramVec_test.go
+++ b/pkg/metricsproxy/histogramvec_test.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (
diff --git a/pkg/metricsproxy/proxy.go b/pkg/metricsproxy/proxy.go
index f15937c209..d51cfad1ca 100644
--- a/pkg/metricsproxy/proxy.go
+++ b/pkg/metricsproxy/proxy.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (
diff --git a/pkg/metricsproxy/proxy_test.go b/pkg/metricsproxy/proxy_test.go
index 9e09086441..f246a9564c 100644
--- a/pkg/metricsproxy/proxy_test.go
+++ b/pkg/metricsproxy/proxy_test.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (
diff --git a/pkg/metricsproxy/summaryVec.go b/pkg/metricsproxy/summaryvec.go
similarity index 98%
rename from pkg/metricsproxy/summaryVec.go
rename to pkg/metricsproxy/summaryvec.go
index 261372f2ed..95458dfb89 100644
--- a/pkg/metricsproxy/summaryVec.go
+++ b/pkg/metricsproxy/summaryvec.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (
diff --git a/pkg/metricsproxy/summaryVec_test.go b/pkg/metricsproxy/summaryvec_test.go
similarity index 97%
rename from pkg/metricsproxy/summaryVec_test.go
rename to pkg/metricsproxy/summaryvec_test.go
index 13b919a47d..1ffdba4b03 100644
--- a/pkg/metricsproxy/summaryVec_test.go
+++ b/pkg/metricsproxy/summaryvec_test.go
@@ -1,3 +1,4 @@
+// Copyright 2020 PingCAP, Inc.
 package metricsproxy
 
 import (