openstack/nova
Code Issues Proposed changes

libvirt: Deprecate support for non-QEMU/KVM backends

Browse Source 
None of these backends has had upstream testing in a very long time, if
ever, and their usage levels are unknown. Deprecate them now so that we
can at least remove the worst of them (UML, Xen) in the next cycle.

Change-Id: Id5b15aa846a5ddaf4ac26fe586327aef8c08c89d
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
This commit is contained in:
Stephen Finucane 2020-08-31 14:12:40 +01:00
parent b5d4804346
commit 340ef02e06
2 changed files with 26 additions and 9 deletions
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26
nova/virt/libvirt/driver.py
View File

@ -601,17 +601,25 @@ class LibvirtDriver(driver.ComputeDriver):
host arch configurations in order to indicate potential issues to
administrators.
"""
if CONF.libvirt.virt_type not in ('qemu', 'kvm'):
LOG.warning(
"Support for the '%(type)s' libvirt backend has been "
"deprecated and will be removed in a future release.",
{'type': CONF.libvirt.virt_type},
)
caps = self._host.get_capabilities()
hostarch = caps.host.cpu.arch
if (CONF.libvirt.virt_type not in ('qemu', 'kvm') or
hostarch not in (fields.Architecture.I686,
fields.Architecture.X86_64)):
LOG.warning('The libvirt driver is not tested on '
'%(type)s/%(arch)s by the OpenStack project and '
'thus its quality can not be ensured. For more '
'information, see: https://docs.openstack.org/'
'nova/latest/user/support-matrix.html',
{'type': CONF.libvirt.virt_type, 'arch': hostarch})
if hostarch not in (
fields.Architecture.I686, fields.Architecture.X86_64,
):
LOG.warning(
'The libvirt driver is not tested on %(arch)s by the '
'OpenStack project and thus its quality can not be ensured. '
'For more information, see: https://docs.openstack.org/'
'nova/latest/user/support-matrix.html',
{'arch': hostarch},
)
if CONF.vnc.keymap:
LOG.warning('The option "[vnc] keymap" has been deprecated '

9
releasenotes/notes/deprecate-libvirt-backends-496446b8b8b225e9.yaml Normal file
View File

@ -0,0 +1,9 @@
---
deprecations:
- |
Support for the ``xen``, ``uml``, ``lxc`` and ``parallels`` libvirt
backends, configured via the ``[libvirt] virt_type`` config option, has
been deprecated. None of these drivers have upstream testing and the
``xen`` and ``uml`` backends specifically have never been considered
production ready. With this change, only the ``kvm`` and ``qemu`` backends
are considered supported when using the libvirt virt driver.