fix map_jinja/metadata
diff --git a/metadata/service/server/single.yml b/metadata/service/server/single.yml
index 0af0ec7..b4f0577 100644
--- a/metadata/service/server/single.yml
+++ b/metadata/service/server/single.yml
@@ -7,7 +7,7 @@
     server:
       enabled: true
       bind:
-        host: ${_param:host_address}
+        host: ${_param:single_address}
       token: ${_param:etcd_initial_token}
       members:
         - host: ${_param:node_address}