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ANNOUNCE: virt-manager 3.0.0 released
by Cole Robinson 16 Sep '20

16 Sep '20

I'm happy to announce the release of virt-manager 3.0.0! virt-manager is a desktop application for managing KVM, Xen, and LXC virtualization via libvirt. The release can be downloaded from: http://virt-manager.org/download/ This release includes: - virt-install --cloud-init support (Athina Plaskasoviti, Cole Robinson) - The virt-convert tool has been removed. Please use virt-v2v instead - A handful of UI XML configuration options have been removed. The XML editor can be used instead. For a larger discussion see this thread: https://www.redhat.com/archives/virt-tools-list/2019-June/msg00117.html - The 'New VM' UI now has a 'Manual Install' option which creates a VM without any required install media - In the 'New VM' UI, the network/pxe install option has been removed. If you need network boot, choose 'Manual Install' and set the boot device after initial VM creation - 'Clone VM' UI has been reworked and simplified - 'Migrate VM' UI now has an XML editor for the destination VM - Global and per-vm option to disable graphical console autoconnect. This makes it easier to use virt-manager alongside another client like virt-viewer - virt-manager: set guest time after VM restore (Michael Weiser) - virt-manager: option to delete storage when removing disk device (Lily Nie) - virt-manager: show warnings if snapshot operation is unsafe (Michael Weiser) - Unattended install improvements (Fabiano Fidêncio) - cli: new --xml XPATH=VAL option for making direct XML changes - virt-install: new --reinstall=DOMAIN option - virt-install: new --autoconsole text|graphical|none option - virt-install: new --os-variant detect=on,require=on suboptions - cli: --clock, --keywrap, --blkiotune, --cputune additions (Athina Plaskasoviti) - cli: add --features kvm.hint-dedicated.state= (Menno Lageman) - cli:--iommu option (Menno Lageman) - cli: Add --graphics websocket= support (Petr Benes) - cli: Add --disk type=nvme source.* suboptions - cli: Fill in all --filesystem suboptions - Translation string improvements (Pino Toscano) - Convert from .pod to .rst for man pages - Switch to pytest as our test runner - Massively improved unittest and uitest code coverage - Now using github issues as our bug tracker Thanks to everyone who has contributed to this release through testing, bug reporting, submitting patches, and otherwise sending in feedback! Thanks, Cole

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Release of libvirt-6.7.0
by Jiri Denemark 01 Sep '20

01 Sep '20

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

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Entering freeze for libvirt-6.7.0
by Jiri Denemark 28 Aug '20

28 Aug '20

I have just tagged v6.7.0-rc1 in the repository and pushed signed tarballs and source RPMs to https://libvirt.org/sources/ The is the first release using meson and ninja which replaced autotools and make so please give the release candidate some testing and in case you find a serious issue which should have a fix in the upcoming release, feel free to reply to this thread to make sure the issue is more visible. If you have not done so yet, please update NEWS.rst to document any significant change you made since the last release. Thanks, Jirka

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Release of libvirt-6.6.0
by Jiri Denemark 03 Aug '20

03 Aug '20

The 6.6.0 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 * Allow configuring of ACPI NUMA HMAT Libvirt allows configuring ACPI Heterogeneous Memory Attribute Table to hint software running inside the guest on optimization. * esx: Add a ``type`` attribute for mac addresses. This attribute allows (when set to ``static``) ignoring VMWare checks of the MAC addresses that would generate a new one if they were in its OUI (00:0c:29). * conf: add control over COW for storage pool directories The storage pool code now attempts to disable COW by default on btrfs, but management applications may wish to override this behaviour. This is now possible via new ``cow`` element. * Improvements * esx: Change the NIC limit for recent virtualHW versions Specifying a virtualHW version greater or equal to 7 (ESXi 4.0) will allow you to use up to 10 NICs instead of 4 as it was previously. * qemu: Support encrypted TLS keys for NBD disks The secret key used for disks can now be encrypted similarly to TLS keys used for migration, chardev and others. * qemu: ``VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD`` can now be registered for ``<mirror>`` The event can now be used also for block copy destinations by using the index of the ``<mirror>`` image. * qemu: consider available CPUs in ``vcpupin/emulatorpin`` output This patch changes the default bitmap of ``vcpupin`` and ``emulatorpin``, in the case of domains with static vcpu placement, all available CPUs instead of all possible CPUs are returned making these APIs consistent with the behavior of ``vcpuinfo``. * Bug fixes * virdevmapper: Don't use libdevmapper to obtain dependencies When building domain's private ``/dev`` in a namespace, libdevmapper was consulted for getting full dependency tree of domain's disks. However, this meant that libdevmapper opened ``/dev/mapper/control`` which wasn't closed and was leaked to QEMU. CVE-2020-14339 * qemu: Report correct ``index`` in ``VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD`` Starting from libvirt 5.10 with QEMU 4.2 the ``VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD`` event would report incorrect device ``index`` when reported for an image from the backing chain of a disk. * qemu: Don't fail active layer block commit or block copy in certain cases Starting from libvirt-6.5 an active layer block commit or a block copy could fail if the same destination was used more than once. * qemu: Don't change ownership of restore file When restoring a domain from a file, Libvirt no longer changes its ownership. * qemu: Set SPAPR TPM default to 2.0 and prevent 1.2 choice The firmware (SLOF) on QEMU for ppc64 does not support TPM 1.2, so prevent the choice of TPM 1.2 when the SPAPR device model is chosen and use a default of '2.0' (TPM 2) for the backend. * qemu: Do not set ``//cpu/@migratable`` for running domains Libvirt release of 6.4.0 started to fill the default value for ``//cpu/@migratable`` attribute according to QEMU support. However, active domains either have the migratable attribute already set or they were started with older Libvirt which doesn't support the attribute. Enjoy. Jirka

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Entering freeze for libvirt-6.6.0
by Jiri Denemark 27 Jul '20

27 Jul '20

I have just tagged v6.6.0-rc1 in the repository and pushed signed tarballs and source RPMs to https://libvirt.org/sources/ Please give the release candidate some testing and in case you find a serious issue which should have a fix in the upcoming release, feel free to reply to this thread to make sure the issue is more visible. If you have not done so yet, please update NEWS.rst to document any significant change you made since the last release. As already announced I'm on vacation next week and thus I won't make the usual second release candidate. If everything looks good when I'm back, I will make the final release on Aug 1. Thanks, Jirka

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Release of libvirt-6.5.0
by Daniel Veillard 04 Jul '20

04 Jul '20

Half a day late, but I pushed the 6.5.0 release out, it is as usual available as a signed tarball and source rpms from the server: https://libvirt.org/sources/ I also tagged and pushed the 6.5.0 python bindings that one can find at https://libvirt.org/sources/python/ This release includes a number of new features and some improvement, as well as a crash which had made its way in 6.4.0. It will also be my last release of libvirt after close to 15 years, so expect new releases to be signed by Jiri Denemark from now on. * New Features: - Allow firmware blobs configuration QEMU offers a way to tweak how firmware configures itself and/or provide new configuration blobs. New ``<sysinfo/>`` type is introduced that will hold these new blobs. It's possible to either specify new value as a string or provide a filename which contents then serve as the value. - nodedev: Add ability to create mediated devices Mediated devices can now be created with ``virNodeDeviceCreateXML()``. This functionality requires the ``mdevctl`` utility to be installed. The XML schema for node devices was expanded to support attributes for mediated devices. - QEMU: add TPM Proxy device support libvirt can now create guests using a new device type called "TPM Proxy". The TPM Proxy connects to a TPM Resource Manager present in the host, enabling the guest to run in secure virtual machine mode with the help of an Ultravisor. Adding a TPM Proxy to a pSeries guest brings no security benefits unless the guest is running on a PPC64 host that has Ultravisor and TPM Resource Manager support. Only one TPM Proxy is allowed per guest. A guest using a TPM Proxy device can instantiate another TPM device at the same time. This device is supported only for pSeries guests via the new 'spapr-tpm-proxy' model of the TPM 'passthrough' backend. - virhook: Support hooks placed in several files Running all scripts from directory /etc/libvirt/hooks/<driver>.d in alphabetical order. Hook script in old place will be executed as first for backward compatibility. - qemu: Add support for migratable host-passthrough CPU QEMU 2.12 made it possible for guests to use a migration-friendly version of the host-passthrough CPU. This feature is now exposed by libvirt. * Improvements: - network: Support NAT with IPv6 It's now possible to use ``<nat ipv6="yes"/>`` in a libvirt network. - qemu: Auto-fill NUMA information for incomplete topologies If the NUMA topology is not fully described in the guest XML, libvirt will complete it by putting all unspecified CPUs in the first NUMA node. This is only done in the QEMU binary itself supports disjointed CPU ranges for NUMA nodes. - qemu: Assign hostdev-backed interfaces to PCIe slots All SR-IOV capable devices are PCIe, so when their VFs are assigned to guests they should end up in PCIe slots rather than conventional PCI ones. * Bug fixes: - qemu: fixed crash in ``qemuDomainBlockCommit`` This release fixes a regression which was introduced in libvirt v6.4.0 where libvirtd always crashes when a block commit of a disk is requested. - qemu: fixed zPCI address auto generation on s390 Removes the correlation between the zPCI address attributes uid and fid. Fixes the validation and autogeneration of zPCI address attributes. - qemu: Skip pre-creation of NVMe disks during migration libvirt has no way to create NVMe devices on the target host, so it now just makes sure they exist and let the migration proceed in that case. Thanks everybody for the help on putting this release out, and the gazillion ones before :-) 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-6.5.0
by Daniel Veillard 28 Jun '20

28 Jun '20

With the end of the month coming next week, it is better to enter freeze today and try to release before the July 4th long week-end in the US. I have just pushed the signed tarball and source rpm to the usual place https://libvirt.org/sources/ Seems to work fine in my very minimal tests, I hope people can do a bit of testing especially on other OSes and distro. If all goes fine I will push rc2 on Tuesday with hopefully a release of 6.5.0 on Thursday. Please give it some testing, 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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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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