Chapter 2. Role-Based Parameters

Substitute _ROLE_ with the name of the role. For example, for _ROLE_Count use ControllerCount.

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Parameter	Description
`_ROLE_Count`	The number of nodes to deploy in a role. The default value is `1`.
`_ROLE_ExtraConfig`	Role specific additional hiera configuration to inject into the cluster.
`_ROLE_HostnameFormat`	Format for node hostnames. Note that `%index%` is translated into the index of the node (e.g 0/1/2) and `%stackname%` is replaced with the stack name (e.g `overcloud`). The default value is `%stackname%-_role_-%index%`.
`_ROLE_Parameters`	Optional Role Specific parameters to be provided to service.
`_ROLE_RemovalPolicies`	List of resources to be removed from the role’s `ResourceGroup` when doing an update that requires removal of specific resources.
`_ROLE_RemovalPoliciesMode`	How to handle change to RemovalPolicies for ROLE ResourceGroup when doing an update. Default mode append will append to the existing blacklist and update would replace the blacklist. The default value is `append`.
`_ROLE_SchedulerHints`	Optional scheduler hints to pass to OpenStack Compute (nova).
`_ROLE_Services`	A list of composable service resources (configured in the `resource_registry`). This represents a set of nested stacks for each service that get installed on the the role.