---
features:
  - |
    The `1.22 microversion`_ of placement adds support for
    excluding resource providers and allocation candidates
    with specified traits. A forbidden trait may be specified
    with ``--forbidden`` option.

    .. _1.22 microversion: https://docs.openstack.org/placement/latest/placement-api-microversion-history.html#support-forbidden-traits-on-resource-providers-and-allocations-candidates
