diff --git a/pkg/info/types.go b/pkg/info/types.go
index 50d92543..92fe546b 100644
--- a/pkg/info/types.go
+++ b/pkg/info/types.go
@@ -15,6 +15,8 @@ const (
 
 type ContainerType string
 
+// the string content matches the corresponding server info file name.
+// DO NOT change it unless the server info file name is changed.
 const (
 	Sourcer           ContainerType = "sourcer"
 	Sourcetransformer ContainerType = "sourcetransformer"