diff --git a/pkg/naming/zookeeper/zookeeper.go b/pkg/naming/zookeeper/zookeeper.go
index 92a203ba0..b6221d052 100644
--- a/pkg/naming/zookeeper/zookeeper.go
+++ b/pkg/naming/zookeeper/zookeeper.go
@@ -61,6 +61,7 @@ type Resolve struct {
 }
 
 // Zookeeper is a zookeeper client Builder.
+// path: /{root}/{appid}/{ip} -> json(instance)
 type Zookeeper struct {
 	c          *Config
 	cli        *zk.Conn