diff --git a/metadata/service/volume/single.yml b/metadata/service/volume/single.yml
index f7ea1d5..2cf5c2b 100644
--- a/metadata/service/volume/single.yml
+++ b/metadata/service/volume/single.yml
@@ -18,6 +18,7 @@
         password: ${_param:mysql_cinder_password}
       identity:
         engine: keystone
+        region: RegionOne
         host: ${_param:cluster_vip_address}
         port: 35357
         tenant: service