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Merge "Add the Xena prelude section"

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Zuul 2021-09-16 16:58:24 +00:00 committed by Gerrit Code Review
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---
prelude: |
The 24.0.0 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 23.0.0 (Wallaby) to 24.0.0 (Xena).
There are a few major changes worth mentioning. This is not an exhaustive
list:
- The latest Compute API microversion supported for Xena is v2.90.
Details on REST API microversions added since the 23.0.0 Wallaby 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
Cyborg-managed SmartNICs can be attached as SR-IOV devices.
.. __: https://docs.openstack.org/api-guide/compute/accelerator-support.html
- Two new ``nova-manage`` CLI commands can be used for `checking`__ the
volume attachment connection information and for `refreshing`__ it if the
connection is stale (for example with a Ceph backing store and MON IP
addresses). Some documentation on how to use them can be found `here`__.
.. __: https://docs.openstack.org/nova/latest/cli/nova-manage.html#volume-attachment-get-connector
.. __: https://docs.openstack.org/nova/latest/cli/nova-manage.html#volume-attachment-refresh
.. __: https://docs.openstack.org/nova/latest/admin/manage-volumes.html#managing-volume-attachments
- Instance hostnames published by the metadata API service or config drives
can be explicitly defined at instance creation time thanks to the new
`2.90 API microversion`__. See the ``hostname`` field documentation on
the `API docs`__ for further details.
.. __: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#maximum-in-xena
.. __: https://docs.openstack.org/api-ref/compute/?expanded=create-server-detail#create-server
- Libvirt virt driver now supports any PCI device, not just virtual
GPUs, that are using the ``VFIO-mdev`` virtualization framework, like
network adapters or compute accelerators. `See more in the spec`__.
.. __: https://specs.openstack.org/openstack/nova-specs/specs/xena/approved/generic-mdevs.html