- Users - libvirt List Archives

[libvirt-users] auto-set /cgroup/*/libvirt/qemu/<vm name>/ directory permissions on creation
by Ben Clay 02 Nov '11

02 Nov '11

Is there a way to automatically set the permissions of cgroups directories created by libvirt when a VM is launched? Although it looks like I can set permissions on top-level /cgroup directories via cgconfig.conf, the cgconfig.conf manpage says "Permissions are related only to enclosing control group and are not inherited by subgroups.". From this, I believe that when libvirt creates VMs, the new directories under /cgroup/*/libvirt/qemu/<vm name>/ will not receive the cgconfig.conf permissions. Where in the libvirt config can I set this? We need users other than root to write to specific subsystems. I can ask on the libcg mailing list as well, but I thought I'd try here first since libvirt is dynamically creating / destroying these groups. Thanks. Ben Clay <mailto:rbclay@ncsu.edu> rbclay(a)ncsu.edu

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[libvirt-users] CentOS5: libvirtd filling up /var/lib/libvirt/qemu/save
by Ben Clay 02 Nov '11

02 Nov '11

How can I disable libvirtd from attempting to suspend VMs on poweroff / reboot? It is slowly filling up our /var/ filesystem with save points at /var/lib/libvirt/qemu/save/<vm name>.save, even though I'm not initiating any suspend or restore functionality. I checked /etc/libvirt/libvirtd.conf and /etc/libvirt/qemu.conf but could not find anything. This is CentOS 5 with libvirt 0.8.2-22 and kvm-83-239. Thanks. Ben Clay <mailto:rbclay@ncsu.edu> rbclay(a)ncsu.edu

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[libvirt-users] Network filesystem pool mount options
by Joe Auty 01 Nov '11

01 Nov '11

Hello, What are the default NFS mount options used by libvirt's network filesystem pool storage management, and can these be modified? -- Joe Auty, NetMusician NetMusician helps musicians, bands and artists create beautiful, professional, custom designed, career-essential websites that are easy to maintain and to integrate with popular social networks. www.netmusician.org <http://www.netmusician.org> joe(a)netmusician.org <mailto:joe@netmusician.org>

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[libvirt-users] Error on the site
by Alexander Biryukov 01 Nov '11

01 Nov '11

Good afternoon. I apologize for my English. Error on page: http://libvirt.org/formatdomain.html To be more precise in the line "<target *def*='hdc' bus='ide'/>" -- Biryukov Alexander ICQ: 467093457 Skype: reddog_gad

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[libvirt-users] Hard limit for the cpu usage of a VM
by sethuraman subbiah 01 Nov '11

01 Nov '11

Hi , I was previously using xen and currently moved to KVM. I am using libvirt to manage these VMs. In den's credit scheduler , I had the ability to set a cap on the cpu usage for a VM. But I was not able to find a similar substitute in KVM. I find that we can use cgroups to provide shares for VM but that will be more like weight based and it doesn't set a hard cap for that VM. I tried using cpulimit but I find it inaccurate and we can give values only between 0-100. Thus, I think it cannot support multi core environments. Can any one suggest a method to set a hard limit on a VM's cpu usage? Thank you. - Regards, Sethuraman Subbiah Graduate Student - NC state University M.S in Computer Science

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[libvirt-users] [ruby-libvirt] who's using it
by Christian Parpart 31 Oct '11

31 Oct '11

Hey all, I would like to know who / what project is using this binding. So I could learn the API a bit easier than reading through the rough rdoc-based API documentation, which is not really helpful to me, as I do not know the C API yet either. my intention is, to some day, be able to create a Rails web app for managing libvirt hosts (mainly OpenVZ/vserver/LXC and possibly QEMU). Thanks in advance, Christian Parpart.

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[libvirt-users] VM with transient disk
by Till Mossakowski 31 Oct '11

31 Oct '11

I want to use transient disks with libvirt. According to [1], the transient disk feature has been supported since 0.9.5. Hence, I have installed libvirt 0.9.6 for Ubuntu Lucid from [2] and used the following disk configuration: <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/home/till/test.img'/> <target dev='vda' bus='virtio'/> <transient/> </disk> However, I get: unsupported configuration: transient disks not supported yet Best, Till [1] http://libvirt.org/formatdomain.html [2] http://ppa.launchpad.net/agent-8131/xen-custom/ubuntu/

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[libvirt-users] How to collect the VM bandwidth usage utilization
by vmnode guy 29 Oct '11

29 Oct '11

Hi Guy, I am trying to figure out how & where can i get the bandwidth usage utilization statistic info for all the VM, so in the end i will be able to use it for metering purpose.. Anyone got any idea ? Regards, Peter

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[libvirt-users] live migration error without shared storage
by Luengffy XUE 28 Oct '11

28 Oct '11

command: virsh migrate --live --copy-storage-all vm qemu+ssh://destinationHost/system error : unexpected failure PS log file in the jpg

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[libvirt-users] libvirt-php - API libvirt_domain_suspend() problem, doesn't work
by vmnode guy 28 Oct '11

28 Oct '11

Hi Guys, I was trying to suspend a virtual machine but fail not sure why.... However i was successfully list all the vm on the host, below are my source code, can any one who have experience in this area give me some advised ? *My OUTPUT from browser* Array ( [libvirt.release] => 3 [libvirt.minor] => 9 [libvirt.major] => 0 [connector.version] => 0.4.3 [connector.major] => 0 [connector.minor] => 4 [connector.release] => 3 ) Resource id #2Array ( [0] => VM_6E472D93-F943-2D1E-B1EA-5896D95B9C84 [1] => VM_B090CFCA-77FE-962B-9D06-F85047324527 [2] => VM_7478E5EB-B843-225A-00FC-09D0E846FE61 [3] => winxpnew [4] => VM_1F9BC5A1-352D-0E7D-8BAB-F46FBFE1C80D [5] => VM_B6DA1C45-3F0D-16EF-FDF1-512935D88C37 [6] => VM_F32717EE-4AA4-A17C-8E4B-D1D5A79612A5 [7] => VM_03ABB818-D226-32FB-0A6E-458849AB7C7B [8] => nagios [9] => VM_6C158DB3-71BE-A0D1-3FFB-1EEE5854E45D [10] => VM_8D560513-036A-14FD-7546-48C370F0A057 [11] => VM_AA3DC5CA-A447-E6E5-0E7A-869416869B1D [12] => VM_C19AC7F1-AA49-92D0-336F-B8A8D7FADCD5 ) *Below are my php source : -* <?php echo "<html><body><pre>"; print_r ( libvirt_version() ); $conn = libvirt_connect('qemu+ssh://root@10.0.0.122/system', true); echo $conn; $doms = libvirt_list_domains($conn); print_r($doms); $doms = libvirt_domain_suspend('VM_7478E5EB-B843-225A-00FC-09D0E846FE61'); print_r($doms); echo "</pre></body></html>"; ?> Thanks!! Regards, Peter

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