environments:
  -
    name: predictable-placement/custom-hostnames
    title: Custom Hostnames
    files:
      overcloud.yaml:
        parameters:
          - ControllerHostnameFormat
          - ComputeHostnameFormat
          - BlockStorageHostnameFormat
          - ObjectStorageHostnameFormat
          - CephStorageHostnameFormat
    description: |
      Hostname format for each role
      Note %index% is translated into the index of the node, e.g 0/1/2 etc
      and %stackname% is replaced with OS::stack_name in the template below.
      If you want to use the heat generated names, pass '' (empty string).