diff --git a/metadata/service/pool/single.yml b/metadata/service/pool/single.yml
index 8c3f04b..f3cb7c0 100644
--- a/metadata/service/pool/single.yml
+++ b/metadata/service/pool/single.yml
@@ -34,4 +34,7 @@
         etcd:
           members:
             - host: ${_param:master_address}
-              port: 4001
\ No newline at end of file
+              port: 4001
+      cni:
+        version: v0.3.0
+        hash: 58237532e1b2b1be1fb3d12457da85f5
\ No newline at end of file