blazar/releasenotes/notes/no-affinity-instance-reserv...

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features:
- |
For instance reservation, the reservation parameter ``affinity`` now
supports ``True`` and ``None`` and defaults to ``None``
- ``affinity = True``
* Blazar picks up the same host for the instances for the reservation.
Using the reservation flavor, users don't need to set additional
specs such as "server_group" to schedule the instances to the host.
- ``affinity = False``
* Blazar picks up different hosts for the instances for the
reservation. Using the reservation flavor, users don't need to set
additional specs such as "server_group" to schedule to the hosts.
- ``affinity = None`` (default)
* The picked up hosts can be different or same.
``AggregateInstanceExtraSpecsFilter``, ``AggregateMultiTenancyIsolation``,
or ``ServerGroupAffinityFilte`` is not needed any more for blazar's
instance reservation.