4:11 a.m.
The 7.3.0 release of both libvirt and libvirt-python is tagged and
signed tarballs and source RPMs are available at
https://libvirt.org/sources/
https://libvirt.org/sources/python/
Thanks everybody who helped with this release by sending patches,
reviewing, testing, or providing any other feedback. Your work is
greatly appreciated.
* New features
* xen: Support domains with more than 4TB
The xen driver now supports domains with more than 4TB of memory with
xen >= 4.13.
* qemu: add socket for virtiofs filesystems
Libvirt now supports ``filesystem`` devices that connect to
a ``virtiofsd`` daemon launched outside of libvirtd, via the
``socket`` attribute of the ``source`` element.
* nodedev: Add ability to manage persistent mediated devices
Persistent mediated devices can now be managed with libvirt.
``virNodeDeviceDefineXML()`` defines a new device,
``virNodeDeviceUndefine()`` removes an existing definition, and
``virNodeDeviceCreate()`` starts a device definition that is currently
inactive. Corresponding virsh commands ``nodedev-define``,
``nodedev-undefine``, and ``nodedev-start`` were also added.
``nodedev-list`` only lists active devices by default. Inactive device
definitions can be shown with the new ``--inactive`` and ``--all`` flags.
* qemu: Allow use of qemu's ``-compat`` option
Curious developers or testers now can enable certain ``-compat`` modes which
allow to notice use of deprecated commands and options as qemu will use the
selected method to notify the user. The new behaviour can be requested using
either the ``deprecation_behavior`` option in ``qemu.conf`` for all VMs or
using ``<qemu:deprecation behavior='...'/>`` in the VM XML.
* Improvements
* virsh: Improve errors with ``virsh snapshot-create-as``
The XML document constructed by virsh was forced through XML schema
validation which yielded unintelligible error messages in cases such as
when the path to the new image did not start with a slash. XML documents
are no longer validated as the XML parser actually has better error
messages which allow users to figure the problem out quickly.
* qemu: Terminate backing store when doing a full-chain block pull
When pulling everything into the overlay image the chain can be terminated
since we know that it won't depend on any backing image and thus can prevent
attempts to probe the backing chain.
* qemu: Expose disk serial in virDomainGetGuestInfo()
The ``virDomainGetGuestInfo()`` reports disk serial number among with other
disk information.
* Bug fixes
* qemu: Fix crash of libvirt on full block pull of a disk
When the persistent definition contains a compatible disk (meaning the
definition of the running and persistent config match) a block pull job
would leave a dangling pointer in the config definition which resulted
in a crash.
* qemu: Use proper job cancelling command
Libvirt's API contract for aborting a block copy job in 'ready' state
declares that the destination image of the copy will contain a consistent
image of the disk from the time when the block job was aborted. This
requires that libvirt uses the proper cancelling qemu command to ensure
that the data is consistent which was not the case.
* qemu: Don't attempt storage migration when there are no migratable disks
Due to a logic bug introduced in the previous release libvirt would attempt
to migrate disks in case when no disks are selected/eligible for migration.
* qemu: Fix very rare race when two block job 'ready' events are delivered
In certain high-load scenarios, qemu might deliver the 'ready' event twice
and if it's delivered when pivoting to the destination during a block copy
job, libvirt would get confused and execute the code as if the job were
aborted.
* lxc: Fix container destroy with CGroupsV2
When an LXC container was started and the host used CGroupsV2 it might have
had created nested controllers under the container's scope. Libvirt was
unaware and thus destroying the container failed with a cryptic error:
``failed to get cgroup backend for 'pathOfController'``. The CGroup removal
code was reworked and is now capable of dealing with such scenario.
* bash-completion: Fix argument passing to $1
Due to a bug in bash completion script, the auto completion did not work
properly when a connection URI or read only flag were specified on
``virsh`` or ``virt-admin`` command line.
Enjoy.
Jirka