---
upgrade:
  - |
    The default value of the following parameters has been changed to
    $::os_service_default. The previous default, undef, can still be used to
    remove parameters from config file, but this behavior will be removed
    in a future release. Make sure that $::os_service_default is used instead
    of undef.

    - ``nova::compute::libvirt::remove_unused_resized_minimum_age_seconds``
    - ``nova::compute::libvirt::remove_unused_base_images``
    - ``nova::compute::libvirt::remove_unused_original_minimum_age_seconds``
