- Users - libvirt List Archives

[libvirt-users] Is this Race Condition?
by Zhihua Che 05 Apr '12

05 Apr '12

Hi, everyone I'm writing application using libvirt and I need call virDomainGetCPUStats to get domain cpu stats . I learn from API reference that this function has to be called when domain is running. So my question is if there is an atomic way to test the domain's state and get its stats? Or, it's ok to call this function when domain is not active, but caller just gets error returned. In my code, I just call it directly and return error. I wonder if this programming practice has subtle problem like race condition.

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[libvirt-users] Bare libvirt web interface
by RaSca 04 Apr '12

04 Apr '12

Hi, I set up a virtual environment based upon KVM/libvirt/pacemaker. When managing this I cannot use virt-manager or virsh, since everything is managed by the cluster. So when I need to migrate a vm I must drive the operation from pacemaker (via crm shell program). I'm ok with this kind of management, but what I need now is just a bare web interface to make the users see just the position (= on which node) and the state of the vm (cpu, memory and so on, like virt-top output). I don't want to use things like ovirt or similar, because I'm managing everything with the cluster and also I cannot use LCMC (http://lcmc.sourceforge.net/) since it is java based and is not as simple as I want. I need just those information to be printed in a self refreshing web page, and before doing it by myself I was just wondering if something already exists. I saw projects like http://karesansui-project.info and https://fedorahosted.org/virt_web but maybe there is something easier and more focused to obtain just the informations I need. Thanks to all of you for your suggestions, -- RaSca Mia Mamma Usa Linux: Niente è impossibile da capire, se lo spieghi bene! rasca(a)miamammausalinux.org http://www.miamammausalinux.org

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[libvirt-users] vcpupin and kvm
by Geoff Galitz 04 Apr '12

04 Apr '12

Hi. Can anyone confirm if vcpupin works correctly with kvm? If set I pin a vcpu it shows up correctly via vcpuinfo, but querying via taskset shows the cpu is not pinned. Thanks, -Geoff -- ---- Geoff Galitz, ggalitz(a)shutterstock.com WebOps Engineer, Europe Shutterstock Images http://wwww.shutterstock.com/

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[libvirt-users] [Building Error] cannot stat `t-af.gmo': No such file or directory
by Zhihua Che 04 Apr '12

04 Apr '12

Hi, everyone I'm building the newest libvirt from git repository, of version 782afa98e4a5fa9a0927a9e32f9cf36082a2e8e7 and failed complaining as the following. make[3]: Entering directory `/home/harvey/open-projects/libvirt-build/po' cd ../../libvirt/po && : --update af.po libvirt.pot cd ../../libvirt/po && rm -f af.gmo && : -c --statistics -o af.gmo af.po mv: cannot stat `t-af.gmo': No such file or directory make[3]: *** [../../libvirt/po/af.gmo] Error 1 make[3]: Leaving directory `/home/harvey/open-projects/libvirt-build/po' make[2]: *** [stamp-po] Error 2 make[2]: Leaving directory `/home/harvey/open-projects/libvirt-build/po' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/harvey/open-projects/libvirt-build' make: *** [all] Error 2 My building steps are cd <build-dir> <src-dir>/autogen.sh --help ./configure --prefix=xxx make

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[libvirt-users] Suggestions on building VM disks from scratch
by Dale Amon 03 Apr '12

03 Apr '12

This may not be the best forum to ask, but it does seem to be one where it is as likely as anywhere that someone will have dealt with a similar problem. I need to define a procedure for last resort disaster recovery from an incremental file level backup of the root partition (and any others that are critical.) Now it is easy enough to create a raw virtual disk with dd, then to losetup and do a cfdisk and mkfs, then mount it and rsync the backup onto it. At this point I would like to be able to install grub and make the virtual disk bootable. I have 'issues' with the way grub does things and the way it seems to make certain assumptions for you. The virtual disk is in actuality going to become an hd(0) on the virtual machine; but my past experience with grub is that it is going to assume you really intend to install the MBR on your running system disk; but if you tell it hd(1) then when you try to boot it ain't gonna work. Has anyone dealt with these issues? It's more than just a VM one; I run up against it time and again. A few months ago I attempted to attach a brand new SATA disk via a USB converter to my laptop so I could build a system on it for a machine that has not CD, no floppy, etc, etc. I damn near clobbered my laptop but fortunately caught the problem in time and fixed it before a reboot... in which case I'd have *really* had issues.

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[libvirt-users] setvcpus
by Bhasker C V 03 Apr '12

03 Apr '12

Hi all, I am facing a bit of a trouble with setvcpus on a kvm libvirt The guest is crashing right after the command is given. I have no trouble with virtio_balloon and that is working fine when I use setmem command in virsh. The guest is running 3.3.1 kernel (the command fails both on the stock kernel 2.6.X as-well-as the latest 3.3.1) I have seen it working in xen. But this is kvm. Does this feature work with kvm ? Am I missing any kernel config which enables this ? thanks eg:- virsh # start fedora12 Domain fedora12 started virsh # vcpuinfo fedora12 VCPU: 0 CPU: 1 State: running CPU time: 7.3s CPU Affinity: yyyy VCPU: 1 CPU: 3 State: running CPU time: 2.3s CPU Affinity: yyyy virsh # vcpu fedora12 vcpucount vcpuinfo vcpupin virsh # vcpucount fedora12 maximum config 8 maximum live 8 current config 2 current live 2 virsh # list Id Name State ---------------------------------- 14 fedora12 running virsh # setvcpus fedora12 4 error: operation failed: could not change CPU online status virsh # list Id Name State ---------------------------------- virsh # virsh # version Compiled against library: libvir 0.9.1 Using library: libvir 0.9.1 Using API: QEMU 0.9.1 Running hypervisor: QEMU 0.14.1 -- Bhasker C V Secure Mails: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4D05FEEC54E47413

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[libvirt-users] Openvswitch support - port tagging
by Daniele Milani 03 Apr '12

03 Apr '12

I was looking at the release candidate of libvirt (0.9.11-rc2) and I have not been able to understand if the openvswitch support includes the port tagging support. So my question is: is it possible to create a tagged port? How? Otherwise, would it be useful to add this functionality? Thanks, Daniele Milani

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[libvirt-users] Reality check requested...
by Dale Amon 03 Apr '12

03 Apr '12

Is this going to do what I think it will do? ie will the output be runable on a current licensed vmware server? qemu-img convert -f raw test.img -O vmdk test.vmdk

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[libvirt-users] (no subject)
by Bo Bo 02 Apr '12

02 Apr '12

<a href="http://elrincondeloespecial.cl/images/stories/elrincondeloespecial/02efpk.h…"> http://elrincondeloespecial.cl/images/stories/elrincondeloespecial/02efpk.h…</a>

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[libvirt-users] call for volunteer: FLOSS weekly podcast opportunity
by Eric Blake 02 Apr '12

02 Apr '12

The FLOSS weekly podcast is interested in doing an interview about libvirt development on June 6, at 9:30am Los Angeles time (UTC-7). For more information on past podcasts, see: http://twit.tv/show/floss-weekly With prodding from Justin Clift, I have volunteered to take on the task, but the show host, Randal, prefers to have two developers per show, so I'm looking for anyone else who has developed for or with libvirt, who would be interested in sharing the opportunity. You don't have to have a lot of commits under your belt, so much as having enough active interest in the project and what it enables you to do. In fact, having someone not directly tied to Red Hat as the second contact will probably provide a nicer balance to the interview. -- Eric Blake eblake(a)redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

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