- Users - libvirt List Archives

[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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[libvirt-users] Live migration with 2 nodes and no SAN
by Trey Dockendorf 28 Oct '11

28 Oct '11

I'd like to begin using live migrations with my KVM install, but I do not have any shared storage. I will have 2 identical nodes, with their own local storage. Everything I've read seems to point to DRDB, but I am not finding many resources on how to implement DRDB + qcow2 + KVM. Currently I've been using virt-manager to manage my VMs which are all using qcow2 images. With a setup using DRDB, if I mount the replicated device to /var/lib/libvirt/images, what ensures that each virtual disk is only being used by a single node until migration is needed? I have no experience with HA systems or services. What suggestions or experiences has anyone had with this type of setup? Any advice is welcome. Thanks - Trey

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[libvirt-users] delete lvm problem: exited with non-zero status 5 and signal 0
by lingjiao.lc 27 Oct '11

27 Oct '11

hi, I use the libvirt-python to manage my virtual machine. When I delete a volume use vol.delete(0), sometimes it note me that has occur the error: libvirtError: internal error '/sbin/lvremove -f /dev/vg.vmms/lvm-v097222.sqa.cm4' exited with non-zero status 5 and signal 0: Can't remove open logical volume "lvm-v097222.sqa.cm4". then I go to the host and run the command: " sudo lvchange -a n /dev/vg.vmms/lvm-v097222.sqa.cm4" and then the volume could delete use vol.delete(0). But it's not often occur, just once in nearly 8. I know the delete function virStorageBackendLogicalDeleteVol as this: { { const char *cmdargv[] = { LVREMOVE, "-f",vol->target.path, NULL }; virCheckFlags(0, -1); virFileWaitForDevices(); if (virRun(cmdargv, NULL) < 0) return -1; return 0; } Could I change it like this: ? if (virRun(cmdargv, NULL) < 0) const char *changeCmdarg[] = { LVCHANGE, "-a", "n", vol->target.path, NULL }; if(virRun(changeCmdarg, NULL) < 0) return -1; else if(virRun(cmdargv,NULL) < 0) return -1; ________________________________ This email (including any attachments) is confidential and may be legally privileged. If you received this email in error, please delete it immediately and do not copy it or use it for any purpose or disclose its contents to any other person. Thank you. 本电邮(包括任何附件)可能含有机密资料并受法律保护。如您不是正确的收件人，请您立即删除本邮件。请不要将本电邮进行复制并用作任何其他用途、或透露本邮件之内容。谢谢。

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[libvirt-users] Need help to compile libvirt-php
by vmnode guy 27 Oct '11

27 Oct '11

Hi guys, I try to compile the libvirt-php but no luck, below are the output i got.. webserver:~/libvirt-php-0.4.3 # ./configure checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... gawk checking whether make sets $(MAKE)... yes checking for style of include used by make... GNU checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking dependency style of gcc... none checking for virConnectOpen in -lvirt... yes checking dependency style of gcc... (cached) none checking whether to disable maintainer-specific portions of Makefiles... yes checking for gcc... (cached) gcc checking whether we are using the GNU C compiler... (cached) yes checking whether gcc accepts -g... (cached) yes checking for gcc option to accept ISO C89... (cached) none needed checking dependency style of gcc... (cached) none checking for a sed that does not truncate output... /usr/bin/sed checking for gawk... (cached) gawk checking for echo... echo checking for rm... rm checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version 0.9.0... yes checking for LIBXML... yes checking for xsltproc... /usr/bin/xsltproc checking for xmllint... /usr/bin/xmllint checking for xmlcatalog... /usr/bin/xmlcatalog checking for php-config... no *configure: error: php-config not found; please install the PHP SDK* webserver:~/libvirt-php-0.4.3 # ls /etc/php5/ apache2/ cli/ conf.d/ webserver:~/libvirt-php-0.4.3 # ls /etc/php5/apache2/ php.ini webserver:~/libvirt-php-0.4.3 # Regards, Peter

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