- Users - libvirt List Archives

[libvirt-users] Post upgrade/s issues with xen, libvirt, and virt-manager.
by Willie Hein WJ3G 11 Nov '14

11 Nov '14

Greetings, I've been suffering from some problems after upgrading my system, and not once but twice. I've been posing my findings in the vender's forum https://forums.opensuse.org/showthread.php/502307-openSUSE-13-1-gt-13-2-upg…. On there you will also find a link to findings of the first upgrade. Maybe you've seen these errors, or have ideas on what's missing in my config. Any help would be greatly appreciated. Willie

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[libvirt-users] migrate works for xen4.4?
by Ajitha Robert 11 Nov '14

11 Nov '14

Hi all, i m using xen 4.4.0 as hypervisor with libvirt 1.2.0. When i tried with migrate command i m facing certain issues.. I need to ensure whether libvirt supports xen 4.4? -- *Regards,Ajitha R*

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[libvirt-users] hvm in xen via libvirt.
by cool dharma06 10 Nov '14

10 Nov '14

hi all, i am using libvirt-1.2.5. i launched my VM(pv) in xen. its worked. But when i tried to launch HVM its not able to launch. i am facing some error. Please suggest me some solutions. thanks& regards, cooldharm06 ..:)

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[libvirt-users] php api binding for setting interface link flags (up/down).
by Vasiliy Tolstov 08 Nov '14

08 Nov '14

Hello. I can't see in php api reference info about setting port status of interface. virsh have comands virsh domif-setlink, but php api does not have link funstions. Please add this interface, bacause it very useful - then we need to disable some vps, but not want to shutdown it. Thanks! -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

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[libvirt-users] backup KVM qcow2 over btrfs or zfs
by Francesco Morosinotto 07 Nov '14

07 Nov '14

Hi everybody, I'm trying to implement in the non profit organization where I work a backup strategy for our VMs. At the moment I weekly backup the machine (on sunday nights) by stopping the vm, making a snapshot, exporting the xml descriptor file and syncing these files to a remote backup server. I would really like to make daily snapshot without shutting down the vms. at the moment the vms qcow2 disks are stored over an ext4 partition but I'm planning to move them over a das with a new generation filesystem. I'm trying out zfs and btrfs looking for the best one (at the moment zfs seems to be more stable and somehow easy, flexible, while btrfs seems to have better performance on my linux box). I'm choosing one of these two FS in order to use theire instant-snapshot feature; my project will be to pause the vm, dump the memory and the xml descriptor file, make a snapshot of the subvolume storing the qcow2 file and the resuming the machine back (in I hope less than 10 seconds of downtime). what do you guys suggest me? Am I going to experience bad performance having qcow2 over btrfs? I was reading something like that but the posts were really backdated... any hints is really appreciated Thank you Francesco

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[libvirt-users] Any recommendation about benchmarking tools on Linux virtual machine?
by Allen Qiu 07 Nov '14

07 Nov '14

Hi all, Do you have any recommendation about benchmarking tools on Linux virtual machine for measure the potential performance hit by virtualization, especially on multi-threads computation, since I doubt if the CentOS VM can fully make use of the 32 vCPUs (out of 64 physical cores) that I allocated to it. Regards, Allen 2014-11-05 Allen Qiu

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[libvirt-users] setvcpus libvirt 1.2.9
by Thomas Stein 06 Nov '14

06 Nov '14

Hello. I'm struggeling a little bit with the setvcpus command. I'm trying now to get this running for a linux VM. Here is what i have: <vcpu placement='auto' current='2'>4</vcpu> Now the VM is starting with 2 CPUs. When i try to increase the number of CPUs i get: setvcpus dev --guest 4 error: invalid argument: requested vcpu count is greater than the count of enabled vcpus in the domain: 4 > 2 Strange thing is when i set in the xml file: <vcpu placement='auto' current='4'>4</vcpu> the VM starts with 4CPUs and setting the CPUs works. I can do: setvcpus dev --guest 2 and: setvcpus dev --guest 4 Is this a bug? Should i try to upgrade to 1.2.10? There seem to be a lot of changes in it regarding setvcpus. thanks and cheers t.

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[libvirt-users] setvcpus --guest on windows
by Thomas Stein 05 Nov '14

05 Nov '14

Hello. Just a quick question. Is "setvcpus $windowsVM --guest 4" supposed to work? I have qemu-guest-agent (1.6.something) running inside a windows7 vm but all i get is: virsh # setvcpus windows7 --guest 4 error: invalid argument: requested vcpu count is greater than the count of enabled vcpus in the domain: 4 > 1 The xml file looks like this: <vcpu placement='static' current='1'>4</vcpu> cheers t.

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[libvirt-users] old vm cannot be migrated, new vm can be migrated
by gustavo panizzo (gfa) 05 Nov '14

05 Nov '14

scenario: i run a mix of libvirt 1.1.1 and 1.2.2 on the source hosts, 1.2.2 on the destination hosts qemu: 1.5.0+dfsg-3ubuntu5.3~cloud0 on all the hosts openstack havana and icehouse description: i have many compute nodes running libvirt+kvm, when i try to migrate guest that were created months ago it fails, if i create a vm and then migrate it works the problem is that libvirt cannot retrieve the mtu of the bridge were the interfaces are be attached, but bridge is there (up and running) $ grep qbr32740ab3-b6 /var/log/libvirt/libvirtd.log 2014-11-05 08:44:53.013+0000: 35311: debug : udevGetDeviceProperty:121 : udev reports device 'qbr32740ab3-b6' does not have property 'DRIVER' 2014-11-05 08:44:53.013+0000: 35311: debug : udevGetDeviceType:1217 : Could not determine device type for device with sysfs name 'qbr32740ab3-b6' 2014-11-05 08:44:53.013+0000: 35311: debug : udevAddOneDevice:1392 : Discarding device -1 0x7f36e80bd5c0 /sys/devices/virtual/net/qbr32740ab3-b6 2014-11-05 08:44:53.013+0000: 35311: debug : udevProcessDeviceListEntry:1414 : Failed to create node device for udev device '/sys/devices/virtual/net/qbr32740ab3-b6' 2014-11-05 08:45:08.458+0000: 35303: error : virNetClientProgramDispatchError:175 : Cannot get interface MTU on 'qbr32740ab3-b6': No such device # ip l show dev qbr32740ab3-b6 639: qbr32740ab3-b6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP link/ether 72:d5:db:f6:b5:30 brd ff:ff:ff:ff:ff:ff # brctl show qbr32740ab3-b6 bridge name bridge id STP enabled interfaces qbr32740ab3-b6 8000.72d5dbf6b530 no qvb32740ab3-b6 tap32740ab3-b6 the difference between a new defined domain and an old one is this < <alias name='pci0'/> --- > <alias name='pci.0'/> > <timer name='hpet' present='no'/> ---> old domain does not have it i even tried patching src/util/virnetdev.c to remove the check and always return 1500 but the same thing happens i'm lost i don't know where to look at it, any clue were to look is appreciated -- 1AE0 322E B8F7 4717 BDEA BF1D 44BB 1BA7 9F6C 6333

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[libvirt-users] ioremap error during bootup
by Allen Qiu 05 Nov '14

05 Nov '14

Hi all, Does anybody have an idea about this "ioremap error" during the booting stage of VM CentOS7, although it can eventually bootup successfully. Regards, Allen 2014-11-05 Allen Qiu

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