Release of libvirt-6.8.0
jdenemar at redhat.com
Thu Oct 1 07:56:06 UTC 2020
The 6.8.0 release of both libvirt and libvirt-python is tagged and
signed tarballs and source RPMs are available at
Thanks everybody who helped with this release by sending patches,
reviewing, testing, or providing any other feedback. Your work is
* New features
* xen: Add ``writeFiltering`` attribute for PCI devices
By default Xen filters guest writes to the PCI configuration space of a
PCI hostdev, which may cause problems for some devices. The ``writeFiltering``
attribute of the device's ``<source>`` element can be used to disable the
filtering and allow all guest writes to the configuration space.
* bhyve: Support setting the framebuffer resolution
Libvirt can now set the framebuffer's "w" and "h" parameters
using the ``resolution`` element.
* bhyve: Support VNC password authentication
Libvirt can now probe whether the bhyve binary supports
VNC password authentication. In case it does, a VNC password
can now be passed using the ``passwd`` attribute on
the ``<graphics>`` element.
* remote: ``virt-ssh-helper`` replaces ``nc`` for SSH tunnelling
Libvirt now provides a ``virt-ssh-helper`` binary on the server
side. The libvirt remote client will use this binary for setting
up an SSH tunnelled connection to hosts. If not present, it will
transparently fallback to the traditional ``nc`` tunnel. The new
binary makes it possible for libvirt to transparently connect
across hosts even if libvirt is built with a different installation
prefix on the client vs server. It also enables remote access to
the unprivileged per-user libvirt daemons (e.g. using a URI such as
``qemu+ssh://hostname/session``). The only requirement is that
``virt-ssh-helper`` is present in ``$PATH`` of the remote host.
* esx: implement few APIs
The ``virConnectListAllNetworks()``, ``virDomainGetHostname()``, and
``virDomainInterfaceAddresses()`` (only for
``VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT`` source) APIs were implemented
in the esx driver.
* qemu: Allow migration over UNIX sockets
QEMU migration can now be performed completely over UNIX sockets. This is
useful for containerised scenarios and can be used in both peer2peer and
* dbus: Use GLib implementation instead of libdbus
Adopting GLib DBus implementation simplifies our code as libdbus provides
low-level APIs where we had to have a lot of helper functions. With this
change we also remove dependency on libdbus and possibly fix all the DBus
related libvirtd crashes seen over the time.
* Re-introduce NVDIMM auto-alignment for pSeries Guests
The auto-alignment logic was removed in v6.7.0 in favor of requiring the
size provided by the user to be already aligned; however, this had the
unintended consequence of breaking some existing guests. v6.8.0 restores
the previous behavior with an improvement: it also reflects the auto-aligned
value in the domain XML.
* qemu: Preserve qcow2 cluster size after external snapshots
The new overlay image which is installed on top of the current chain when
taking an external snapshot now preserves the cluser size of the original
top image to preserve any performance tuning done on the original image.
* Bug fixes
* qemu: Various (i)SCSI backed hostdev fixes
(i)SCSI backed hostdevs now work again with an arbitrarily long
user-specified device alias and also honor the 'readonly' property after a
* Removed features
* node_device: Remove HAL node device backend
HAL is deprecated on all supported OS so there is no need to keep it
in libvirt. udev backend is used on Linux OSes and devd can be eventually
implemented as replacement for FreeBSD.
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