parametrized hostnames for cluster setups
diff --git a/reclass/storage/system/openstack_control_cluster.yml b/reclass/storage/system/openstack_control_cluster.yml
index 482d826..deb25b8 100644
--- a/reclass/storage/system/openstack_control_cluster.yml
+++ b/reclass/storage/system/openstack_control_cluster.yml
@@ -1,9 +1,13 @@
 parameters:
+  _param:
+    openstack_control_node01_hostname: ctl01
+    openstack_control_node02_hostname: ctl02
+    openstack_control_node03_hostname: ctl03
   reclass:
     storage:
       node:
         openstack_control_node01:
-          name: ctl01
+          name: ${_param:openstack_control_node01_hostname}
           domain: ${_param:cluster_domain}
           classes:
           - cluster.${_param:cluster_name}.openstack.control
@@ -15,7 +19,7 @@
             opencontrail_database_id: 1
             rabbitmq_cluster_role: master
         openstack_control_node02:
-          name: ctl02
+          name: ${_param:openstack_control_node02_hostname}
           domain: ${_param:cluster_domain}
           classes:
           - cluster.${_param:cluster_name}.openstack.control
@@ -27,7 +31,7 @@
             opencontrail_database_id: 2
             rabbitmq_cluster_role: slave
         openstack_control_node03:
-          name: ctl03
+          name: ${_param:openstack_control_node03_hostname}
           domain: ${_param:cluster_domain}
           classes:
           - cluster.${_param:cluster_name}.openstack.control