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[libvirt-users] snapshot create error, unable to find cgroup for vm
by Gao Yongwei 22 May '13

22 May '13

Hello: Yesterday I yum update libvirt from 0.9.10 to 0.10.2 ,after update I got some error in libvirtd.log like this: 2013-05-10 07:39:09.440+0000: 18824: warning : virCgroupMoveTask:885 : no vm cgroup in controller 3 2013-05-10 07:39:09.440+0000: 18824: warning : virCgroupMoveTask:885 : no vm cgroup in controller 4 2013-05-10 07:39:09.440+0000: 18824: warning : virCgroupMoveTask:885 : no vm cgroup in controller 6 so,I restarted cgconfig and libvirtd daemon : service cgconfig restart ; service libvirtd restart after that ,I cannot create snapshot for vm anymore.and error log message below: 2013-05-16 01:13:23.638+0000: 28848: error : qemuDomainSnapshotCreateDiskActive:11299 : internal error Unable to find cgroup for vm1 my version info : # rpm -q libvirt libvirt-0.10.2-18.el6_4.4.x86_64 # rpm -q qemu-kvm qemu-kvm-0.12.1.2-2.295.el6_3.1.x86_64 in /cgroup dir I cannot find anything about vm1.how can I recover the missing cgroup for vm ? thanks !

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[libvirt-users] USB passthrough not working
by Dale Amon 21 May '13

21 May '13

I just updated an Ubuntu Oneiric to Raring and the VM that works fine on one fails to start a VM with this passthrough: <hostdev mode='subsystem' type='usb' managed='no'> <source> <vendor id='0x055f'/> <product id='0x040b'/> <address bus='3' device='8'/> </source> </hostdev> It just dies at boot time.

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[libvirt-users] Two VF cards
by Dominik Mostowiec 21 May '13

21 May '13

Hi, I try to add 2 VF functions to VM via network. Livirt networks: vnet0: <network> <name>vnet0</name> <forward mode='hostdev' managed='yes'> <pf dev='eth0'/> </forward> </network> vnet1: <network> <name>vnet0</name> <forward mode='hostdev' managed='yes'> <pf dev='eth1'/> </forward> </network> In VM configuration: <interface type="network"> <source network="vnet0"/> <mac address="52:54:0a:b1:48:07"/> </interface> <interface type="network"> <source network="vnet1"/> <mac address="52:54:0a:b1:48:07"/> </interface> VM can't start because: kvm: -device pci-assign,configfd=24,host=01:10.1,id=hostdev0,bus=pci.0,addr=0x4: Duplicate ID 'hostdev0' for device libvirt version 1.0.5. What i am doing wrong? -- Regards Dominik

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[libvirt-users] How to use xl (in place of xm) with libvirt 1.0.2 and Xen 4.2.1 in Ubuntu 13.04?
by Gizmo Chicken 21 May '13

21 May '13

QUESTION: What, if anything, can I do so that I can use xl (in place of xm) with libvirt 1.0.2 and Xen 4.2.1 in Ubuntu 13.04? BACKGROUND: I am testing a fully updated (as of March 27) installation of Ubuntu 13.04 that includes the following packages: libvirt - version 1.0.2-0ubuntu9 xen-hypervisor-4.2-amd64 - version 4.2.1-0ubuntu1 Upon setting TOOLSTACK=xm in /etc/default/xen (as well as making a few needed tweaks to /etc/xen/xend-config.sxp), libvirt and virt-manager worked great. Yippee! I guess that I should be happy that the xm toolstack still works with Xen 4.2.1 and quit while I'm ahead, but... According to libvirt's documentation: "libxl: Starting with Xen 4.2, the legacy XenD/xm toolstack is deprecated in favor of libxl, also commonly called libxenlight. libvirt supports this new Xen toolstack via the libxl driver. If XenD is enabled, the legacy xen driver consisting of the above mentioned channels will be used. If XenD is disabled, the libxl driver will be used." See http://libvirt.org/drvxen.html. In view of the above, I attempted to use xl in place xm by setting TOOLSTACK=xl in /etc/default/xen. And after doing so (both with and without, the above mentioned tweaks to /etc/xen/xend-config.sxp), I recieved the following error when attempting to start virt-manager: Unable to connect to libvirt. unable to connect to 'localhost:8000': Connection refused Verify that: - A Xen host kernel was booted - The Xen service has been started Libvirt URI is: xen:/// Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/connection.py", line 1027, in _open_thread self.vmm = self._try_open() File "/usr/share/virt-manager/virtManager/connection.py", line 1009, in _try_open flags) File "/usr/lib/python2.7/dist-packages/libvirt.py", line 102, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth() failed') libvirtError: unable to connect to 'localhost:8000': Connection refused

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[libvirt-users] libvirtd using 11GB
by Alex Leonhardt 20 May '13

20 May '13

Hi All, Am new to this list, and have asked in #ovirt / ovirt-users list and they pointed me to here ... I've seen libvirtd using ~11 GB of resident memory after the host has been running for about 60+ days with about 40 VMs running on it. The versions I'm currently running are : libvirt.x86_64 0.9.10-21.el6_3.7 libvirt-client.x86_64 0.9.10-21.el6_3.7 libvirt-lock-sanlock.x86_64 libvirt-python.x86_64 0.9.10-21.el6_3.7 I know I can just restart libvirtd and "all should be fine" (and hopefully I'll regain the 11GB of memory) - however, is there an updated version that maybe fixes a memory leak ?? Thanks in advance, Alex -- | RHCE | Sen Sys Engineer / Platform Architect | www.vcore.co | www.vsearchcloud.com |

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[libvirt-users] How to see the console output of an EXE session?
by Jon Taylor 19 May '13

19 May '13

Hi, I am having trouble with a libvirt lxc EXE container which is starting another EXE container itself, and I need to see the console output of (hopefully) both containers. How do I do this? I have searched the net a lot, but the answers I found were either out of date, wrong or didn't work. Has anyone else here done this? Jon

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[libvirt-users] nova compute libvirt driver and libvirt compatibility
by arvind viswanathan 17 May '13

17 May '13

Hi, >From my reading about nova interface to libvirt, I came to know it uses a libvirt driver module to communicate with host libvirt. I was wondering if there are any compatibility matrix available between the nova libvirt driver and the libvirt installed in the host ? Thanks Arvind

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[libvirt-users] connect to esx: Could not find HostSystem with name '(null)'
by Dimitri Nilsen 16 May '13

16 May '13

Hi all, I am trying to connect to esx vi libvirt 0.10.2. virsh # connect esx://hostname?no_verify=1&auto_answer=1 error: Failed to connect to the hypervisor error: internal error Could not find HostSystem with name '(null)' could you give me a hint, what could be a reason for that problem in a debug log of libvirt I see: 14447: debug : virAuthGetConfigFilePath:77 : Checking for readability of '/root/.libvirt/auth.conf' 14447: debug : virAuthGetConfigFilePath:86 : Checking for readability of '/etc/libvirt/auth.conf' 14447: debug : virAuthGetConfigFilePath:95 : Using auth file '(null)' 14447: error : esxVI_LookupManagedObjectHelper:4854 : internal error Could not find HostSystem with name '(null)' 14447: debug : do_open:1180 : driver 1 ESX returned ERROR Regards Dimitri

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[libvirt-users] Getting libvirt Error when setting IO tune read_bytes_sec value using libvirt API virDomainSetBlockIotune
by vikrant verma 16 May '13

16 May '13

Hi All, I am setting the value for "read_bytes_sec" using the following API code virDomainSetBlockIoTune(dom, "/mnt/tmpsdb/FileVM1", parainfoPtr, nparams, 2); I am succesfully able to set this value and i can read it back using the API virDomainGetBlockIoTune(dom,"/mnt/tmpsdb/FileVM1",parainfoPtr,&nparams,2); But after setting this value when i shutdown my VM and start it again I am getting following error - ibvirtError: internal error Process exited while reading console log output: qemu-system-x86_64: -drive file=/mnt/tmpsdb/FileVM1,if=none,id=drive-ide0-1-1,format=raw,bps_rd=1048576: Invalid parameter 'bps_rd' Note - when i see dumpxml of the VM following lines are got added after setting the iotunes for read_bytes_sec <iotune> <read_bytes_sec>1048576</read_bytes_sec> </iotune> Please help me. Also i wanted to know whether we can set block IO tune for a VM using the above API. Is it same as the IO throttling provided by cgroup?

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[libvirt-users] libvir: QEMU Driver error : internal error Cannot find suitable emulator for armv7l
by Clark Laughlin 15 May '13

15 May '13

Hello, I am trying to run OpenStack (via devstack) on an Arndale board using Linaro's 13.04 release. I am getting a libvirt error that I was hoping someone could provide some more detail about: libvir: QEMU Driver error : internal error Cannot find suitable emulator for armv7l If this is coming from libvirt, what is it looking for for a suitable emulator? Or, is this something I need to search starting with QEMU? Thank you in advance, Clark L

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