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This is mostly distro updates as our MIN versions didn't change during the cycle. Change-Id: If30d75c8fa96aa6ed7f0483d791d1dea86f58c08
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Libvirt virt driver OS distribution support matrix
This page documents the libvirt versions present in the various distro versions that OpenStack Nova aims to be deployable with.
Note
This document was previously hosted on the OpenStack wiki:
Libvirt minimum version change policy
At the start of each Nova development cycle this matrix will be consulted to determine if it is viable to drop support for any end-of-life or otherwise undesired distro versions. Based on this distro evaluation, it may be possible to increase the minimum required version of libvirt in Nova, and thus drop some compatibility code for older versions.
When a decision to update the minimum required libvirt version is
made, there must be a warning issued for one cycle. This is achieved by
editing nova/virt/libvirt/driver.py to set
NEXT_MIN_LIBVIRT_VERSION. For example:
NEXT_MIN_LIBVIRT_VERSION = (X, Y, Z)This causes a deprecation warning to be emitted when Nova starts up warning the admin that the version of libvirt in use on the host will no longer be supported in the subsequent release.
After a version has been listed in
NEXT_MIN_LIBVIRT_VERSION for one release cycle, the
corresponding actual minimum required libvirt can be updated by
setting
MIN_LIBVIRT_VERSION = (X, Y, Z)At this point of course, an even newer version might be set in
NEXT_MIN_LIBVIRT_VERSION to repeat the process....
An email should also be sent at this point to the
openstack-discuss@lists.openstack.org mailing list as a
courtesy raising awareness of the change in minimum version requirements
in the upcoming release, for example:
http://lists.openstack.org/pipermail/openstack-discuss/2021-January/019849.html
There is more background on the rationale used for picking minimum versions in the operators mailing list thread here:
http://lists.openstack.org/pipermail/openstack-operators/2015-May/007012.html
QEMU minimum version change policy
After choosing a minimum libvirt version, the minimum QEMU version is determined by looking for the lowest QEMU version from all the distros that support the decided libvirt version.
MIN_{LIBVIRT,QEMU}_VERSION
and NEXT_MIN_{LIBVIRT,QEMU}_VERSION table
| OpenStack Release | Nova Release | MIN_LIBVIRT_VERSION |
NEXT_MIN_LIBVIRT_VERSION |
MIN_QEMU_VERSION |
NEXT_MIN_QEMU_VERSION |
| Havana | 2013.2.0 | 0.9.6 | 0.9.6 | ||
| Icehouse | 2014.1 | 0.9.6 | 0.9.11 | ||
| Juno | 2014.2.0 | 0.9.11 | 0.9.11 | ||
| Kilo | 2015.1.0 | 0.9.11 | 0.9.11 | ||
| Liberty | 12.0.0 | 0.9.11 | 0.10.2 | ||
| Mitaka | 13.0.0 | 0.10.2 | 1.2.1 | ||
| Newton | 14.0.0 | 1.2.1 | 1.2.1 | 1.5.3 | 1.5.3 |
| Ocata | 15.0.0 | 1.2.1 | 1.2.9 | 1.5.3 | 2.1.0 |
| Pike | 16.0.0 | 1.2.9 | 1.3.1 | 2.1.0 | 2.5.0 |
| Queens | 17.0.0 | 1.2.9 | 1.3.1 | 2.1.0 | 2.5.0 |
| Rocky | 18.0.0 | 1.3.1 | 3.0.0 | 2.5.0 | 2.8.0 |
| Stein | 19.0.0 | 3.0.0 | 4.0.0 | 2.8.0 | 2.11.0 |
| Train | 20.0.0 | 3.0.0 | 4.0.0 | 2.8.0 | 2.11.0 |
| Ussuri | 21.0.0 | 4.0.0 | 5.0.0 | 2.11.0 | 4.0.0 |
| Victoria | 22.0.0 | 5.0.0 | 6.0.0 | 4.0.0 | 4.2.0 |
| Wallaby | 23.0.0 | 6.0.0 | 7.0.0 | 4.2.0 | 5.2.0 |
| Xena | 24.0.0 | 6.0.0 | 7.0.0 | 4.2.0 | 5.2.0 |
OS distribution versions
This table provides information on a representative sample of OS distros and the version of libirt/QEMU/libguestfs that they ship. This is NOT intended to be an exhaustive list of distros where OpenStack Nova can run - it is intended to run on any Linux distro that can satisfy the minimum required software versions. This table merely aims to help identify when minimum required versions can be reasonably updated without losing support for important OS distros.
| OS Distro | GA date | Libvirt | QEMU/KVM | libguestfs |
| CentOS Stream | ||||
| 8 | Provided by the advanced-virtualization module as of 2021-11-18. | 7.0.0-14 | 5.2.0-16 | 1.44.0-2 |
| 9 | As of 2021-11-18. | 7.8.0-1 | 6.1.0-6 | 1.46.0-4 |
| Debian | ||||
| 11.x (Bullseye) ("stable") | 2021-10-09 | 7.0.0 | 5.2 | 1.42.0 |
| 12.x (Bookworm) ("testing") | No GA date as of 2021-11-18 | 7.6.0 | 6.1 | 1.42.0 |
| Fedora | ||||
| 34 | 2021-04-27 | 7.0.0 | 5.2.0 | 1.45.4 |
| 35 | 2021-11-02 | 7.6.0 | 6.1.0 | 1.46.0 |
| SUSE | ||||
| Leap 15.2 | 2020-07-02 | 6.0.0 | 4.2.0 | 1.38.0 |
| Leap 15.3 | 2021-06-02 | 7.2.0 | 6.0.0 | 1.44.1 |
| RHEL | ||||
| 8.2 | 2020-04-28 | 6.0.0-17.2 | 4.2.0-19 | 1.40.2-22 |
| 8.3 | 2020-10-29 | 6.0.0-25.5 | 4.2.0-29 | 1.40.2-24 |
| 8.4 | 2021-05-18 | 7.0.0-8 | 5.2.0-10 | 1.44.0-2 |
| 8.5 | 2021-11-09 | 7.6.0-6 | 6.0.0-33 | 1.44.0-3 |
| SLES | ||||
| 15 (SP2) | 2020 | 6.0.0 | 4.2.1 | 1.38.0 |
| 15 (SP3) | 2021 | 7.1.0 | 5.2.0 | 1.38.0 |
| Ubuntu | ||||
| 20.04 (Focal Fossa LTS) | 2020-04-23 | 6.0.0 | 4.2 | 1.40.2 |
| 21.04 (Hirsute Hippo) | 2021-04-22 | 7.0.0 | 5.2 | 1.44.1 |