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_SchedulerHints`	Optional scheduler hints to pass to OpenStack Compute (nova).
`_ROLE_Services`	A list of service resources (configured in the OpenStack Orchestration (heat) resource_registry) which represent nested stacks for each service that should get installed on the ROLE role.