- Announce - libvirt List Archives

libvirt 6.4.0 is available
by Daniel Veillard 02 Jun '20

02 Jun '20

I made the release earlier, it is tagged in git and signed source tarball and rpm are available at the usual place: https://libvirt.org/sources/ I didn't push an RC2 this week end as there was no code change from RC1 only a bug fix made its way yesterday. I also pushed a python binding 6.4.0 release that can be found at: https://libvirt.org/sources/python/ There isn't that much detail about the release in the news file, obviously a decent amount of bug fixes and improvements though: Improvements: - qemu: stricter validation for disk type='lun' The 'lun' type is meant for SCSI command passthrough, which can't be achieved if qemu's block layer features are used. Disk type='lun' is now allowed only when the format is 'raw' and no other block layer features are requested. Bug fixes: - qemu: fixed regression in network device hotplug with new qemu versions Starting from QEMU-5.0 it's required to conform to strict schema when hotplugging network devices. Libvirt didn't conform to the schema so in versions prior to 6.4.0 network device hotplug fails in certain cases. This version fixes it and adds stricter testing to prevent further issues. Thanks everybody for your help with this release, enjoy and stay safe ! 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/

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Entering freeze for libvirt-6.4.0
by Daniel Veillard 27 May '20

27 May '20

We are getting at the end of the month and Monday is closed here, so I though it was better to roll RC1 even if I had not yet announced the release plan, I assume it's better than skipping by a few days. So it is there, I tagged it in git head and pushed signed tarball and source rpm to the usual place: https://libvirt.org/sources/ I seems to work in my limited testing and there is only a few red spots on the CI https://ci.centos.org/view/libvirt/ but TBH that doesn't look critical. Please give it a try, I will try to roll RC2 on Friday, then assuming everything looks fine 6.4.0 could go out on Tuesday, thanks in advance, 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/

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Release of libvirt-6.3.0
by Daniel Veillard 07 May '20

07 May '20

It's out, tagged in git and the signed sources tarball and rpm are available from the usual place: https://libvirt.org/sources/ I have also pushed the python bindings 6.3.0 release at their usual place https://libvirt.org/sources/python/ Among the things to note is the revamp of the vbox support, deprecating old 5.x versions but adding new 6.x API to control the hypervisor. New features: - qemu: support disabling hotplug/unplug of PCIe devices libvirt can now set the "hotplug" option for pcie-root-ports and pcie-switch-downstream-ports, which can be used to disable hotplug/unplug of devices from these ports (default behavior is for these controllers to accept all hotplug/unplug attempts, but this is often undesireable). - vbox: added support for version 6.0 and 6.1 APIs libvirt can now support use of the VirtualBox 6.0 and 6.1 APIs. This is compile tested only, so we are looking for feedback from users on how well it works in practice. - xen: Add support for 'e820_host' hypervisor feature e820_host is a Xen-specific option only available for PV guests. When enabled it provides the guest with a virtual e820 memory map based on the host one. It must be enabled to allow hotplugging PCI devices to PV guests, particularly when memory ballooning is enabled. - xen: Add support for 'passthrough' hypervisor feature passthrough is a Xen-specific option new to Xen 4.13 that enables PCI passthrough for guests. It must be enabled to allow hotplugging PCI devices. - qemu: support async IO mode 'io_uring' Linux 5.1 introduces a fast and efficient async IO interface io_uring, then qemu implements that in version 5.0. It could be used in file, host device and host cdrom backend by io='io_uring' of disk XML. - Lease time option included for network DHCP settings Users can now configure expiry time for leases for networks where libvirt manages DHCP. The time can be specified for whole range and/or fine tuned per individual host. - qemu: Implement pSeries Spectre mitigation features Users can now setup the following capabilities of pSeries guests: CFPC (Cache Flush on Privilege Change), SBBC (Speculation Barrier Bounds Checking) and IBS (Indirect Branch Speculation). Improvements: - qemu: Allow checkpoint redefine for offline VMs Skip the liveness and capability checks when redefining checkpoints as we don't need QEMU interactions to update the metadata. - daemons: Improve timeout handling Daemons now support --timeout 0 which suppresses daemon killing after given time of inactivity. - qemu: Add support for 'multidevs' option This option prevents misbehaviours on guest if a QEMU 9pfs export contains multiple devices, due to the potential file ID collisions this otherwise may cause. Bug fixes: - qemu: Various embed driver fixes When using shared resources from embed driver (e.g. hugepages, machined, etc.) libvirt now generates an unique handler that is not conflicting with other embed drivers or system or session daemons. - cpu: Distinguish Cascadelake-Server from Skylake-Server Libvirt now properly detects Cascadelake-Server and Skylake-Server processors which differ only in stepping. - qemu: Fix domain restore from a block device When using namespaces, libvirt was unable to restore a domain from a block device because libvirt tried to relabel the device inside the namespace while QEMU was given FD to the block device in the host. - node_device_udev: Handle move events Libvirt now handles move event which is emitted on a NIC rename. - qemu: Fix capabilities probing with TCG Libvirt no long assumes TCG is always available. It now detects whether QEMU supports TCG and reports it accordingly. Removed features: - vbox: removed support for version 5.0 and 5.1 APIs libvirt no longer supports use of VirtualBox 5.0 and 5.1 since these versions reached their end of life on 2017/05 and 2018/04 respectively. Thanks everybody for your help with this release, stay safe, enjoy ! 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/

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ANNOUNCE: libvirt-dbus 1.4.0 released
by Pavel Hrdina 30 Apr '20

30 Apr '20

I'm happy to announce the release of libvirt-dbus 1.4.0. libvirt-dbus wraps libvirt API to provide high-level object-oriented API better suited for dbus-based applications. https://libvirt.org/sources/dbus/libvirt-dbus-1.4.0.tar.xz * New features - Support for all relevant domain snapshot APIs * Build-system changes - Converted to meson/ninja build system * Documentation - Everything was converted to reStructuredText Thanks everybody who contributed! Pavel

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Entering freeze for libvirt 6.3.0
by Daniel Veillard 28 Apr '20

28 Apr '20

We are getting close to the end of the month, so I tagged RC1 in git and pushed signed source tarball and rpms to the usual place: https://libvirt.org/sources/ Seems to work fine in my very limited testing, CI seems green except for a couple of mingw tests, so that looks good from a distance. Please give it some testing, RC2 should land on Thursday, and then if everything looks fine I could push the final version over the coming week-end. Stay safe, please test it, thanks, 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/

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Release of libvirt-6.2.0
by Daniel Veillard 02 Apr '20

02 Apr '20

Mea-culpa I forgot to push RC2 on Tuesday, rather than pushing the release off by 2 more days, I decided to push the release today to stay on schedule. As a result 6.2.0 is out, tagged in git and source tarball and rpm are available at the usual place: https://libvirt.org/sources/ I also pushed a release of the python binding with minimal changes that can be found at: https://libvirt.org/sources/libvirt/ New features: - qemu: NVDIMM support for pSeries guests QEMU 5.0 implements NVDIMM memory support for pSeries guests. This is done by adding an 'uuid' element in the memory XML, which can either be provided in the XML or, if omitted, generated automatically. - qemu: Add virtiofs support This feature, introduced in QEMU 4.2, is a more modern alternative to virtio-9p, which is exposed through the same <filesystem/> element. - admin: Support reloading TLS certificates After renewing TLS certificates, it was usually necessary to restart libvirtd for the new ones to be loaded: now the same result can be obtained without restarting the daemon by using virt-admin server-update-tls. Removed features: - Removed support for INI style of comments With switching of our internal code to GLib, parsing of client authentication config files is handed over to GLib which does not support INI style of comments starting with a semicolon (;). Use number sign (#) instead. * Improvements - qemu: Don't compare local and remote hostnames on migration This check was introduced to prevent same-host migration, but did not work as expected when multiple libvirtd instances were running on the same host but in different containers. With this release, the host UUID (which should be unique to the container) is checked instead. - qemu: Use per-VM event loops Instead of using a single even loop to process communication with the QEMU monitor and guest agent, create a separate one for each VM. This helps with scalability and prevents scenarios where a single malfunctioning VM could affect all those running on the same host. - qemu: Support migration with SLIRP helper interface With QEMU 5.0, a new D-Bus backend allows migration of external processes. When needed, libvirt will start a per-vm D-Bus bus, and migrate the slirp-helper along with QEMU. Bug fixes: - qemu: Open backing chain late for shallow block copy reusing external images With introduction of -blockdev for QEMU storage configuration in libvirt-5.10 we've started opening the backing chain of the destination/mirror of a virDomainBlockcopy started with VIR_DOMAIN_BLOCK_COPY_REUSE_EXT | VIR_DOMAIN_BLOCK_COPY_SHALLOW flags when starting the job rather than when virDomainBlockJobAbort with VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT is issued. For users depending on this undocumented quirky pre-blockdev behaviour this caused a regression as the backing chain could not be modified while the copy of the top image was progressing due to QEMU image locking. Note that this fix also requires qemu-5.0 while -blockdev is used starting from QEMU-4.2. - Don't generate machine names containing dots Even though the guest name containing dots is not a problem for libvirt itself, we need to strip them out when registering with machined because of the latter's requirements. Thanks everybody who contributed to this release be it with bug reports, fixes, reviews, documentation, etc ... Enjoy the release, stay safe! 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/

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Entering freeze for libvirt-6.2.0
by Daniel Veillard 27 Mar '20

27 Mar '20

I forgot to announce plans, sorry about this, entering freeze now I hope there isn't too many pending patchestargetting this release. The plan would be to push the RC2 on Tuesday with a release on April 2nd if everything goes fine. You can find the signed tarball and source rpm at the usual place: https://libvirt.org/sources/ the rc1 is also tagged in git. Please give it a try, so we can have a normal release, in those time of pandemy, take care, stay safe, thanks ! 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/

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Release of libvirt-6.1.0
by Daniel Veillard 04 Mar '20

04 Mar '20

It's out, one day late, though I did the build and pushed the tag in git yesterday, but I had forgotten to push the commit, thanks Boris for raising this to me. So it's now available as signed tarball and rpm source package at the usual place: https://libvirt.org/sources/ This release come with a number of new features as listed below but also make the packaging change of not relying on gnulib anymore for platform compatibility, so there are some serious changes in this version: New features: - qemu: new rng backend type: builtin It implements qemu builtin rng backend. That uses getrandom syscall to generate random, no external rng source needed. Available since QEMU 4.2. - support for virtio+hostdev NIC <teaming> QEMU 4.2.0 and later, combined with a sufficiently recent guest virtio-net driver (e.g. the driver included in Linux kernel 4.18 and later), supports setting up a simple network bond device comprised of one virtio emulated NIC and one hostdev NIC (which must be an SRIOV VF). (in QEMU, this is known as the "virtio failover" feature). The allure of this setup is that the bond will always favor the hostdev device, providing better performance, until the guest is migrated - at that time QEMU will automatically unplug the hostdev NIC and the bond will send all traffic via the virtio NIC until migration is completed, then QEMU on the destination side will hotplug a new hostdev NIC and the bond will switch back to using the hostdev for network traffic. The result is that guests desiring the extra performance of a hostdev NIC are now migratable without network downtime (performance is just degraded during migration) and without requiring a complicated bonding configuration in the guest OS network config and complicated unplug/replug logic in the management application on the host - it can instead all be accomplished in libvirt with the interface <teaming> subelement "type" and "persistent" attributes. - support BR_ISOLATED flag for guest interfaces attached to a Linux host bridge Since Linux kernel 4.18, the Linux host bridge has had a flag BR_ISOLATED that can be applied to individual ports. When this flag is set for a port, traffic is blocked between that port and any other port that also has the BR_ISOLATED flag set. libvirt domain interface config now supports setting this flag via the <port isolated='yes'/> setting. It can also be set for all connections to a particular libvirt network by setting the same option in the network config - since the port for the host itself does not have BR_ISOLATED set, the guests can communicate with the host and the outside world, but guests on that network can't communicate with each other. This feature works for QEMU and LXC guests with interfaces attached to a Linux host bridge. - qemu: Introduce the 'armvtimer' timer type QEMU 5.0 introduces the ability to control the behavior of the virtual timer for KVM ARM/virt guests, and this new timer type exposes the same capability to libvirt users. - qemu: Storage configuration improvements Libvirt now accepts <backingStore type='volume'> and allows specifying the offset and size of the image format container inside the storage source via the <slices> subelement. - qemu: Introduce the 'tpm-spapr' TPM model This device, available starting from QEMU 5.0, is limited to pSeries guests. Improvements: - qemu: Image format probing is allowed in certain cases To resolve regressions when users didn't specify the backing image format in the overlay, libvirt now probes the format in certain secure scenarios which fixes a few common existing cases. Additionally the knowledge base was extended to provide more information on how to rectify the problem. - qemu: Support "dies" in CPU topology This CPU topology concept, new in QEMU 4.1.0, sits between the existing "socket" and "core". - libxl: Add support for Credit2 scheduler parameters - lxc: Add support LXC 3 network configuration format Bug fix: - conf: Do not generate machine names ending with a dash Recent systemd versions do not allow them. Packaging changes: - use of gnulib has been completely eliminated Historically libvirt has embedded gnulib to provide fixes for various platform portability problems. This usage has now been eliminated and alternative approaches for platform portability problems adopted where required. This has been validated on the set of platforms covered by automated CI build testing. Other modern Linux distros using glibc are expected to work. Linux distros using non-glibc packages, and other non-Linux platforms may encounter regressions when building this release. Please report any build problems encountered back to the project maintainers for evaluation. Thanks everybody for your help with this release, and sorry for the delay, 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/

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Entering freeze for libvirt 6.1.0
by Daniel Veillard 29 Feb '20

29 Feb '20

As suggested yesterday, I just tagged RC1 in git and pushed signed tarball and source rpm to the usual place: https://libvirt.org/sources/ Seems to work fine in my limited testing, CI is green (amazing !) https://ci.centos.org/view/libvirt/ so looks fine so far, please give it some testing, planning RC2 on Friday with a possible delivery next Monday, thanks, 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/

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Release of libvirt-php-0.5.5
by Michal Prívozník 08 Feb '20

08 Feb '20

After 2.5 years, I'm glad to announce new release of PHP bindings. You can download them from here: https://libvirt.org/sources/php/libvirt-php-0.5.5.tar.gz The changelog contains a lot of code cleanups, bug fixes and some new APIs implemented (virDomainReset and virDomainInterfaceAddresses). Thanks to everybody who helped with the release. Michal

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