---
features:
  - |
    The 2.86 microversion adds support for flavor extra spec validation when
    creating or updating flavor extra specs. Use of an unrecognized or invalid
    flavor extra spec in the following namespaces will result in a HTTP 400
    response.

    - ``accel``
    - ``aggregate_instance_extra_specs``
    - ``capabilities``
    - ``hw``
    - ``hw_rng``
    - ``hw_video``
    - ``os``
    - ``pci_passthrough``
    - ``powervm``
    - ``quota``
    - ``resources`` (including ``_{group}`` suffixes)
    - ``trait`` (including ``_{group}`` suffixes)
    - ``vmware``