[Libvirt-announce] Release of libvirt-3.0.0
by Daniel Veillard
So I got mixed reports in the last day about the state of the head
but one of the big issues seems solved, and I'm not sure keeping the
freeze much longer will help, so libvirt-3.0.0 is out. It's tagged in
git, signed tarball and rpms are available at thet usual place:
ftp://libvirt.org/libvirt/
I also pushed python bindings release too which one can find at
ftp://libvirt.org/libvirt/python/
It includes a fair amount of changes despite the slowdown around the end of
year break:
* New features
- Domain events for metadata content changes
The domain events framework has a new event ID that can be used to get
notifications when domain metadata content changes.
- Event notifications for the secret object
The secret object now supports event notifications, covering lifcycle
changes and secret value changes.
- New localPtr attribute for "ip" element in network XML
- qemu: Support QEMU group I/O throttling
Add the capability to allow group I/O throttling via a new domain
<disk> <iotune> subelement "group_name" to allow sharing I/O throttling
quota between multiple drives.
- nss: Introduce libvirt_guest
New libvirt_guest nss module that translates libvirt guest names into
IP addresses.
- daemon: Add support for runtime logging settings adjustment
Logging-related settings like log outputs and filters can now be
adjusted during runtime using the admin interface without the necessity
of the daemon's restart.
- storage: Add virStorageVolInfoFlags API
Add the API to support using the VIR_STORAGE_VOL_GET_PHYSICAL flag in
order to return the host physical size in bytes of the image container
in the allocation field of the _virStorageVolInfo structure. The
--physical flag has been added to the virsh vol-info command to access
the data.
- libxl: Implement virDomainGetMaxVcpus API
- storage: Add overwrite flag checking for logical pool
Add support for the OVERWRITE flags for the logical storage backend
including checking for existing data on the target volumes when
building a new logical pool on target volume(s).
- qemu: Add support for guest CPU configuration on s390(x)
* Improvements
- perf: Add more perf statistics
Add support to get the count of branch instructions executed, branch
misses, bus cycles, stalled frontend cpu cycles, stalled backend cpu
cycles, and ref cpu cycles by applications running on the platform.
- conf: Display <physical> for volume xml
Add a display of the <physical> size of a disk volume in the output of
the volume XML.
- qemu: Use virtio-pci by default for aarch64 mach-virt guests
virtio-pci provides several advantages over virtio-mmio, such as the
ability to hotplug devices and improved performance. While opting in to
virtio-pci has been possible for a while, newly-defined guests will now
use it automatically.
- vbox: remove support for VirtualBox 3.x and older
Those old VirtualBox versions have been unsupported by upstream for a
long time and the API of 4.0 and newer has diverged enough to require
code abstractions to handle differences. Removing support for those old
versions drops lots of code from the driver and simplifies the logic to
ease implementation of new features going forward.
- virsh: pool-info: introduce option --bytes
Add option --bytes to virsh pool-info in order ti allow display of
units in bytes rather than default of human readable output.
- scsi: Add parent wwnn/wwpn or fabric capability for createVport
Improve the algorithm searching for the parent scsi_host device for
vHBA/NPIV scsi_host creation. Rather than supplying the "parent" by
name, it's now possible to define the parent by it's wwnn/wwpn or
fabric_wwn in the node device create XML or the storage pool XML.
- qemu: aggregate pcie-root-ports onto multiple functions of a slot
When pcie-root-ports are added to pcie-root in order to provide a place
to connect PCI Express endpoint devices, libvirt now aggregates
multiple root ports together onto the same slot (up to 8 per slot) in
order to conserve slots. Using this method, it's possible to connect
more than 200 endpoint devices to a guest that uses PCIe without
requiring setup of any PCIe switches.
* Bug fixes
- lxc: fix accidental killing of containers during libvirtd restart
The libvirt_lxc process was previously not moved into the container
scope. As a result, if systemd reloads its config after a container is
started, when libvirtd is later restarted it will accidentally kill the
containers.
- qemu: Correct GetBlockInfo values
For an active domain, correct the physical value provided for a raw
sparse file backed storage and the allocation value provided for a
qcow2 file backed storage that hasn't yet been opened on the domain.
- qemu: Make virtio console usable on ppc64 guests
The chardev detection code has been improved and can now handle this
configuration properly.
- qemu: Enable mount namespace
To avoid funny races with udev relabelling devices under our hands and
to enhance security, libvirt now spawns each qemu process with its own
/dev.
- storage: Fix implementation of no-overwrite for file system backend
Fix file system storage backend implementation of the OVERWRITE flags
to be consistent between code and documentation. Add checks to ensure
that when building a new file system on a target volume that there is
not something already on the disk in a format that libvirt can
recognize.
- qemu: Create hugepage path on per domain basis
Historically, all hugepage enabled domains shared the same path under
hugetlbfs. This left libvirt unable to correctly set security labels on
it. With this release, however, each domain is put into a separate path
which is also correctly labeled.
- conf: Reject domains with duplicate drive addresses
Reject duplicate drive addresses for disks and hostdevs at domain
definition.
- libxl: reverse defaults on HVM net device attach
Fixes network interface attach for HVM domains when no model is
specified. Emulated hotplug isn't yet supported and hence we should
default to the general working scenario.
- libxl: always enable pae for x86_64 HVM
By default pae is disabled in libxl. Without an explicit <pae/> setting
in the domain <features> configuration, an x86_64 HVM domain would be
get an i686 environment. pae should always be enabled for x86_64 HVM
domains.
Thanks everybody for your contributions to this release, hopefully that
won't be a brown paper bag one !
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/
8 years
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- 0
Re: [Libvirt-announce] [libvirt] Availability of libvirt-3.0.0 release candidate 2
by Michal Privoznik
On 01/17/2017 02:13 PM, Marc Hartmayer wrote:
> Update:
> It's a SELinux labeling problem and seems to be introduced by the
> QEMU namespace patches.
>
I wouldn't guess from the error message that qemu is getting EPERM.
Anyway, the SELinux issue is fixed in -rc2:
commit 93a062c3b293685024d60e841a37e93e303f4943
Author: Michal Privoznik <mprivozn(a)redhat.com>
AuthorDate: Fri Jan 13 10:03:23 2017 +0100
Commit: Michal Privoznik <mprivozn(a)redhat.com>
CommitDate: Fri Jan 13 14:45:52 2017 +0100
qemu: Copy SELinux labels for namespace too
When creating new /dev/* for qemu, we do chown() and copy ACLs to
create the exact copy from the original /dev. I though that
copying SELinux labels is not necessary as SELinux will chose the
sane defaults. Surprisingly, it does not leaving namespace with
the following labels:
crw-rw-rw-. root root system_u:object_r:tmpfs_t:s0 random
crw-------. root root system_u:object_r:tmpfs_t:s0 rtc0
drwxrwxrwt. root root system_u:object_r:tmpfs_t:s0 shm
crw-rw-rw-. root root system_u:object_r:tmpfs_t:s0 urandom
As a result, domain is unable to start:
error: internal error: process exited while connecting to monitor:
Error in GnuTLS initialization: Failed to acquire random data.
qemu-kvm: cannot initialize crypto: Unable to initialize GNUTLS
library: Failed to acquire random data.
The solution is to copy the SELinux labels as well.
Reported-by: Andrea Bolognani <abologna(a)redhat.com>
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
> On Tue, Jan 17, 2017 at 11:18 AM +0100, Marc Hartmayer <mhartmay(a)linux.vnet.ibm.com> wrote:
>> Hey,
>>
>> I have tried to live hot plug a disk backed on a qcow2 disk (see XML
>> snippet below) on a s390 system and I've got the following error
>> message:
>>
>> <error_message>
>> internal error: unable to execute QEMU command 'device_add': Property
>> 'scsi-hd.drive' can't find value 'drive-scsi0-0-0-0'
>> </error_message>
>>
>> <xml_snippet>
>> <disk type="file">
>> <driver name="qemu" type="qcow2"/>
>> <source file="/tmp/virtd-test_e3hnhh5/disk1.qcow2" />
My namespace patches should not clash with this as this isn't a device
from /dev/*. In the namespace, it's just /dev that is different to the
parent namespace. So anything else (e.g. under /tmp) is "shared" with
the parent namespace (it is the same mount in fact).
>> <target bus="scsi" dev="sda" />
>> </disk>
>> </xml_snippet>
>>
>> With v2.5.0 everything has worked. I'll take a closer look to it today.
You can try and see if this is a namespace caused issue. Just disable
the namespaces and retry. If it succeeds with namespaces disabled, the
bug indeed is in my namespaces patches.
btw: to disable namespaces set: namespaces=[] in /etc/libvirt/qemu.conf
Michal
8 years
- 1
- 0
[Libvirt-announce] Entering freeze for libvirt-3.0.0
by Daniel Veillard
As planned, I tagged the RC1 in git and pushed signed tarball and rpms
to the usual location:
ftp://libvirt.org/libvirt/
This seems to work fine in my limited testing but as usual we need
community feedback on it and especially testing on different systems and
architectures, so please give it a try !
If everything works fine then I will push rc2 on Friday and hopefully
3.0.0 final on Monday,
so please give it a try to make sure that 0.0 release is nonetheless
a good one :-)
thanks !
Daniel
--
Daniel Veillard | Open Source and Standards, Red Hat
veillard(a)redhat.com | libxml Gnome XML XSLT toolkit http://xmlsoft.org/
http://veillard.com/ | virtualization library http://libvirt.org/
8 years
- 1
- 1
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