The 6.7.0 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.
* Packaging changes
* Libvirt switch to Meson build system
Libvirt abandoned autotools and switched to Meson build system.
* New features
* qemu: Add support for initiator IQN configuration for iSCSI hostdevs
Similarly to iSCSI ``<disk>`` users can use an ``<initiator>`` element
inside ``<hostdev>`` with the same format to configure the ``IQN`` value
used by the qemu initiator when connecting to an iSCSI target.
* xen: Add support for device model command-line passthrough
Xen supports passing arbitrary arguments to the QEMU device model using
the ``device_model_args`` setting in xl.cfg(5). The libvirt xen driver now
supports this using ``<xen:commandline/>`` XML extensions.
* shmem: Add support for shmem-{plain, doorbell} ``role`` option
The ``role`` attribute controls how the domain behaves on migration. With
``role=master``, the guest will copy the shared memory on migration to
the destination host. With ``role=peer``, the migration is disabled.
* bhyve: Sound device support
This feature allows to configure guest sound device using
the ``<sound>`` element, and map it to the host sound device using
the ``<audio>`` element.
* Improvements
* Allow sparse streams for block devices
Sparse streams (e.g. ``virsh vol-download --sparse`` or ``virsh vol-upload
--sparse``) now handle if one of the stream ends is a block device.
* Remove NVDIMM auto-alignment for pSeries Guests
This feature was introduced in libvirt v6.2.0 as part of the overall
NVDIMM support for pSeries guests. The idea was to relieve the user
from knowing ppc64 alignment details, but the end result is that we
ended up with inconsistencies between domain XML and actual NVDIMM
size the guest is using. To promote consistency between domain XML
and the guest, unaligned NVDIMM sizes for pSeries guests will now be
forbidden and no size auto-alignment will be made. Instead, libvirt will
suggest an aligned round up size for the user.
* Bug fixes
* virdevmapper: Deal with kernels without DM support
In the previous release libvirt dropped libdevmapper in favor of its own
implementation. However, it failed to deal correctly with kernels that
either don't have device mapper enabled or where the dm-mod module is not
loaded yet. This is now fixed.
* resctrl: Use exclusive lock for /sys/fs/resctrl
When two or more domains were attempted to start at once, due to a bug in
implementation, resctrl was not locked properly and thus threads did not
mutually exclude with each other resulting in not setting requested
limitations.
* mdev: Fix daemon crash when reattaching mdevs on assignment conflict
If there's a list of mdevs to be assigned to a domain, but one of them (NOT
the first) is already assigned to a different domain then libvirtd would
crash. This is now fixed.
* Fix logic in setting COW flag on btrfs
When COW is not explicitly requested to be disabled or enabled, then
libvirt should do nothing on non-BTRFS file systems.
* Avoid crash due to race in glib event loop code
Libvirt switched to glib event loop in 6.1.0 but it was also tickling a bug
in glib code leading to the daemon crash. Libvirt way of calling glib was
changed so the daemon crashes no more.
* virdevmapper: Handle kernel without device-mapper support
In the previous release, Libvirt dropped libdevmapper in favor of its own
implementation. But the implementation did not handle kernels without
device-mapper support. This is now fixed.
* remove autogenerated macvtap names from migration XML
Autogenerated macvtap device names were being left in the
migration XML, which could result in libvirt erroneously deleting
the macvtap device of a different guest in the aftermath of
failing to restart the guest on the destination host. Removing the
autogenerated names avoids this.
Enjoy.
Jirka
