-the hostnames of the deployed servers you intend to use for each role type::
-
- export controller_hosts="controller0 controller1 controller2"
- export compute_hosts="compute0"
+the the names of your custom roles (if applicable) and hostnames of the deployed
+servers you intend to use for each role type. For each role name, a
+corresponding <role-name>_hosts variable should also be defined, e.g.::
+
+ export ROLES="Controller NewtorkNode StorageNode Compute"
+ export Controller_hosts="10.0.0.1 10.0.0.2 10.0.0.3"
+ export NetworkNode_hosts="10.0.0.4 10.0.0.5 10.0.0.6"
+ export StorageNode_hosts="10.0.0.7 10.0.08"
+ export Compute_hosts="10.0.0.9 10.0.0.10 10.0.0.11"