2:02 p.m.
A few hours ago I tagged the release in git and pushed the signed tarball
and source rpm to the usual place:
https://libvirt.org/sources/
I also tagged a release of the python bindings which you can find at
https://libvirt.org/sources/python/
This is a balanced release with new features, improvements and bug fixes, also
note some deprecation for KVM assignment support and for build with older versions
of libxml2.
New features:
- qemu: Support Direct Mode for Hyper-V Synthetic timers
The QEMU driver now supports Direct Mode for Hyper-V Synthetic timers
for Hyper-V guests.
- lib: Add virDomainGetGuestInfo()
This API is intended to aggregate several guest agent information
queries and is inspired by stats API virDomainListGetStats(). It is
anticipated that this information will be provided by a guest agent
running within the domain. It's exposed as virsh guestinfo.
- Split libvirtd into separate daemons
The big monolithic libvirtd daemon can now be replaced by smaller
per-driver daemons. Distributions can chose if they want the former or
the latter. The libvirtd is still kept around for backwards
compatibility.
Removed features:
- Remove KVM assignment support
The KVM style of PCI device assignment was removed from the kernel in
version 4.12.0 after being deprecated since 4.2.0. Libvirt defaults to
VFIO for a long time. Remove support for KVM device assignment from
libvirt too.
- libxml: min required libxml is now 2.9.1
Support for building with libxml versions older than 2.9.1 has been
dropped.
Improvements:
- virsh: Support setting bandwidth in migrate subcommand
In addition to postcopy bandwidth, the virsh migrate subcommand now
supports specifying precopy bandwidth with the --bandwidth parameter.
- libxl: Implement domain metadata getter/setter
The libxl driver now supports virDomainGetMetadata() and
virDomainSetMetadata() APIs.
- test driver: Expand API coverage
Additional APIs have been implemented in the test driver.
- Report RNG device in domain capabilities XML
Libvirt now reports if RNG devices are supported by the underlying
hypervisor in the domain capabilities XML.
- Stop linking virt-login-shell and NSS plugins with libvirt.so
In order to allow libvirt to abort on out of memory, we need to stop
linking libvirt.so to virt-login-shell or the NSS plugins where we
don't want to abort. This change also resulted in smaller binaries and
libraries.
- qemu: Allow migration with disk cache on
When QEMU supports flushing caches at the end of migration, we can
safely allow migration even if disk/driver/@cache is neither none nor
directsync.
Bug fixes:
- Various security label remembering fixes
In the previous release libvirt introduced remembering of original
owners and SELinux labels on files. However, the feature did not work
properly with snapshots, on migrations or on network filesystems. This
is now fixed.
- Allow greater PCI domain numbers
Libvirt used to require PCI domain number to be not greater than
0xFFFF. The code was changed to allow 32 bits long numbers.
- Various D-Bus fixes
When D-Bus is not available, libvirt was reporting random errors. These
are now gone.
- Prefer read-only opening of PCI config files
When enumerating PCI bus, libvirt opens config files under sysfs mount
and parses them to learn various aspects of the device (e.g. its
capabilities). Only in a very limited number of cases it is actually
writing into the file. However, it used to open the file also for
writing even if it was only reading from it.
- Fix AppArmor profile
Since the 5.6.0 release, libvirt uses procfs to learn the list of
opened file descriptors when spawning a command. However, our AppArmor
profile was not allowing such access.
- Don't block storage driver when starting or building a pool
Starting or building a storage pool can take a long time to finish.
During this time the storage driver was blocked and thus no other API
involving the storage driver could run. This is now fixed.
Thanks everybody who helped for this release, be it with patches, reviews,
bug reports, docs, etc...
Enjoy the release !
Daniel
--
Daniel Veillard | Red Hat Developers Tools http://developer.redhat.com/
veillard(a)redhat.com | libxml Gnome XML XSLT toolkit http://xmlsoft.org/
http://veillard.com/ | virtualization library http://libvirt.org/