nova/releasenotes/notes/deprecate-AZ-filter-28406ab...

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---
deprecations:
- |
The ``AvailabilityZoneFilter`` scheduler filters is now deprecated
for removal in a future release. The functionality of the
``AvailabilityZoneFilter`` has been replaced by the
``map_az_to_placement_aggregate`` pre-filter which was introduced in
18.0.0 (Rocky). This pre-filter is now enabled by default and will be
mandatory in a future release.
upgrades:
- |
The ``AvailabilityZoneFilter`` has been removed from the default
``[scheduler] enabled_filters`` list. The ``AvailabilityZoneFilter``
is replaced by an optional placement pre-filter which is enabled by
``[scheduler] query_placement_for_availability_zone``.
The pre-filter is now enabled by default. If you choose to disable the
AZ pre-filter, you will need to re-add ``AvailabilityZoneFilter`` to the
``[scheduler] enabled_filters`` config value.