---
prelude: |
    The 23.0.0 release includes many new features and bug fixes. Please be
    sure to read the upgrade section which describes the required actions to
    upgrade your cloud from 22.0.0 (Victoria) to 23.0.0 (Wallaby).

    There are a few major changes worth mentioning. This is not an exhaustive
    list:

    - The latest Compute API microversion supported for Wallaby is v2.88.
      Details on REST API microversions added since the 22.0.0 Victoria release
      can be found in the `REST API Version History`__ page.

      .. __: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html

    - `Support for accelerators`__ in Nova servers has been improved. Now
      shelving and unshelving instances using Cyborg accelerators is supported.

      .. __: https://docs.openstack.org/api-guide/compute/accelerator-support.html

    - Attaching `neutron ports with QoS minimum bandwidth rules`__ to existing
      instances is now possible.

      .. __: https://docs.openstack.org/api-guide/compute/port_with_resource_request.html

    - The nova-scheduler service now verifies which compute nodes can be used
      for instances having `requested networks or ports`__ by looking at the
      network segments related to the compute nodes.

      .. __:  https://docs.openstack.org/neutron/latest/admin/config-routed-networks.html

    - The Hyper-V virt driver can now attach Cinder RBD volumes.

    - The libvirt virt driver now supports new features :

      - You can `change the default machine type`__ on a compute node safely

        .. __: https://docs.openstack.org/nova/latest/admin/hw-machine-type.html

      - You can enable `UEFI secure boot`__ for new instances

        .. __: https://docs.openstack.org/nova/latest/admin/secure-boot.html

      - `vDPA (vHost data path acceleration)`__ usage is now possible

        .. __: https://specs.openstack.org/openstack/nova-specs/specs/wallaby/approved/libvirt-vdpa-support.html