January 2012 - Users - libvirt List Archives

[libvirt-users] Communication with Hyper-V
by Vadim Gurevich 10 Jan '12

10 Jan '12

Hi, I'm interested in using libvirt to communicate with Microsoft's Hyper-V. I'm trying to use virsh, but with no success. I have a machine that runs Windows Server Developer Preview with Hyper-V on it, ip x.x.x.x I set the service Basic and AlloUnencrypted properties on this machine to true, as required I also have a Linux machine x.x.y.y, with libvirt installed. This is what I get: virsh -c hyperv://x.x.x.x/?transport=http error: Cannot read CA certificate '/etc/pki/CA/cacert.pem': No such file or directory error: failed to connect to the hypervisor My questions are: 1. As I understand, if my hypervisor was on Linux, there's a daemon "libvirtd" that should be installed on it. Is there an equivalent service for Windows? I installed this thing on the Hyper-V machine: http://libvirt.org/sources/win32_experimental/Libvirt-0.8.8-0.exe, but am not sure about its purpose. 2. Why do I get an error about certificate, when I specified the transport to be http? Thanks, Vadim

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[libvirt-users] Host and VM performance using libvirt
by Ananth 09 Jan '12

09 Jan '12

Hi, Is there any libvirt API for measuring the Host and VM performance parameters. Or is there any virsh command implementing the same for KVM? eg: CPU utilization, memory utilization, load percentage, CPU Mhz etc., -- Regards Ananth

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[libvirt-users] libvirt-bin always hung
by mao weijie 08 Jan '12

08 Jan '12

I have installed libvirt-bin in my ubuntu 11.10 libvirt-bin version is 0.9.2.-4 ubuntu15.1 But running after a time, it is always hung. It is not response if I use "virt" . And openstack using libvirt too, it also does not work. 非淡泊無以明志，非寧靜無以致遠

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[libvirt-users] hooks not working on Ubuntu
by Zoltan Lippai 08 Jan '12

08 Jan '12

Hi everybody! I was trying to set up port forwarding to one of my VM's but I'm stuck. I was following this guide: http://wiki.libvirt.org/page/Networking#Forwarding_Incoming_Connections So I've created the hook script but it seems like libvirt is not calling it upon the start of the VM. I've put this into the hook script: date >> /tmp/libvirt-hook-debug but the file was never created. Also I put this in the script: echo "Could not find required XYZZY" >&2 exit 1 (just to make sure) This should show up in the libvirt log, but it's not there. I think it is safe to say, that this script is never called. I am using Ubuntu 11.10 and I know about the apparmor.d bug (https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/891472) so I tried to change the apparmor profile as suggested, I even tried to turn apparmor off temporarily (service apparmor teardown) but still no luck. I have libvirt 0.9.2-4ubuntu15.1 (they say the bug is fixed in 0.9.7 but it's not yet available in the repo and I'm not even sure, that my problem is related to that bug). So do you have any idea what could be going on in here? Thanks, Zoltan Lippai

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[libvirt-users] Libvirtd slowness
by Nathan March 06 Jan '12

06 Jan '12

Hi, Can anyone tell me if it's normal to take over 2 seconds to connect to the libvirt daemon? xen1 ~ # time virsh -c 'xen://xen5/' pwd real 0m2.102s xen1 ~ # time virsh -c 'xen://xen1/' pwd real 0m2.217s Strace shows it sitting for 2.08s on polling the remote socket: poll([{fd=6, events=POLLIN}, {fd=7, events=POLLIN}], 2, -1) = 1 ([{fd=6, revents=POLLIN}]) <2.082839> Not quite sure why though? Experiencing this on both 0.9.7 and 0.9.0. This happens both with virsh and the perl libvirt bindings. If i just spawn virsh interactively I only incur that 2s hit on intial spawn, all commands are very quick and responsive. Anyone have any suggestions? - Nathan -- Nathan March<nathan(a)gt.net> Gossamer Threads Inc. http://www.gossamer-threads.com/ Tel: (604) 687-5804 Fax: (604) 687-5806

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[libvirt-users] Python bindings for libvirt
by Ananth 06 Jan '12

06 Jan '12

Hi, I referred to the developer guide in libvirt.org regarding python bindings. But the document says TBD and it was last updated in 2010. Could you point to any sources regarding python bindings to call libvirt APIs? -- Regards Ananth

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[libvirt-users] Issue with event registration
by Tyrion Lannister 05 Jan '12

05 Jan '12

Hi, I could find only one post related to this, but that did not address my problem. I am trying to register for VM events using virConnectDomainEventRegisterAny, but that is returning with the error "libvir: Remote error : this function is not supported by the connection driver: no event support" I have registered for the default event implementation (as suggested in the response to an earlier post related to this problem) prior to calling *RegisterAny, but that is not helping. Browsing through the coe, it seems to me this has to do with the timer support in the domainEventState, just a guess. if (priv->domainEventState->timer < 0) { remoteError(VIR_ERR_NO_SUPPORT, "%s", _("no event support")); goto done; } I am using Centos 6 with KVM QEMU. Thanks, Suresh

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[libvirt-users] libvirt-java: generate Java code from rng schema
by Celsina Bignoli 04 Jan '12

04 Jan '12

Hi, I am a quite new to libvirt, and need to use it from within Java code. I was wondering if anyone has been able to generate Java classes from the publisher rng schema. I also wonder why rng format was used over more common formats, which would make things easier since there are a number of code generators for it which are well established, at least in the Java world... Any suggestion would be greatly appreciated. Thank you, elsa

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[libvirt-users] Feasibility of iscsi storage pool
by Dennis Jacobfeuerborn 04 Jan '12

04 Jan '12

Hi, I want to start using iscsi storage but ran into a problem. I defined a storage pool and this contains my first LUN which is mounted on a hypervisor. When I now add a second LUN on a target and do a tgt-admin --update --force to reload the target the i/o to the first LUN seems to freeze for a few seconds. Now I'm wondering if I'm doing anything wrong? It's not really tolerable to have all guests using this target freeze simply because I want to add another LUN. The alternative is to use one LUN per target and define lots of targets on the server but then the whole pool configuration no longer makes sense as I would essentially end up with one pool per guest volume. Does anyone have experience with this kind of setup? Regards, Dennis

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[libvirt-users] [LIBVIRT] Xen issue.
by Armand Leclercq 04 Jan '12

04 Jan '12

Hi everybody, I'ld to use virsh over ssh in order to connect to my xen hypervisor from one of my DomU. I tried: virsh -c xen+ssh://root@192.168.0.67:22 list --all And it correctly listed the started virtual computers. And when I tried virsh connect xen+ssh://root@192.168.0.67:22 And I got. error: no connection driver available for xen:/// error: failed to connect to the hypervisor Does that mean I wrongly configured my computers or that libvirt does not support such connection from a DomU. -- Armand Leclercq EPITA 2013 06 71 57 90 73 armand.leclercq(a)gmail.com. /Computer Science is embarrassed by the computer./ _Alan Perlis_

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