diff --git a/nova/compute_ironic/cluster.yml b/nova/compute_ironic/cluster.yml
index bed113f..b921306 100644
--- a/nova/compute_ironic/cluster.yml
+++ b/nova/compute_ironic/cluster.yml
@@ -18,14 +18,14 @@
         host: ${_param:openstack_database_address}
         port: 3306
         name: nova
-        user: nova
+        user: ${_param:mysql_nova_username}
         password: ${_param:mysql_nova_password}
       identity:
         engine: keystone
         region: ${_param:openstack_region}
         host: ${_param:cluster_vip_address}
         port: 35357
-        user: nova
+        user: ${_param:keystone_nova_username}
         password: ${_param:keystone_nova_password}
         tenant: service
         protocol: ${_param:cluster_internal_protocol}
@@ -46,7 +46,7 @@
         region: ${_param:openstack_region}
         host: ${_param:neutron_service_host}
         port: 9696
-        user: neutron
+        user: ${_param:keystone_neutron_username}
         tenant: service
         password: ${_param:keystone_neutron_password}
         protocol: ${_param:cluster_internal_protocol}
@@ -56,7 +56,7 @@
         region: ${_param:openstack_region}
         host: ${_param:ironic_service_host}
         port: 6385
-        user: ironic
+        user: ${_param:keystone_ironic_username}
         tenant: service
         password: ${_param:keystone_ironic_password}
         auth_type: password