- 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 02 Nov '11

02 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 02 Nov '11

02 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 01 Nov '11

01 Nov '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 01 Nov '11

01 Nov '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 30 Oct '11

30 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 29 Oct '11

29 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 28 Oct '11

28 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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[libvirt-users] live migration without shared storage problems.
by Luengffy XUE 27 Oct '11

27 Oct '11

Hi, all I migrate a vm from source host to the destination host. I am sure every part is ok for migration. 1 Create the image in the destination and change the user and group. 2 Open TCP socket in the destination host. and I migrate in the source host command line. $ virsh migrate --live --copy-storage-all vmubuntu qemu+ssh://destinationHost/system --verbose But I get the error "error: operation failed : failed to retrieve chardev info inqemu with 'info chardev'" In the destination I find in the vmubuntu.log The error is "Migration failed. Exit code tcp:0.0.0.0:49170(-98),exiting." What can I do to solve it ? I do not understand how the error comes. Anyone can help me ? Thanks in advance.

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[libvirt-users] Start of libvirtd fails with error "undefined symbol: __virAlloc"
by Langenbach, Steffen 27 Oct '11

27 Oct '11

Hello List like described in the topic I have a problem with starting the libvirtd. I'm a complete newbie with libvirtd, today I heard the first time that such a daemon exists after I get the message that our webserver isn't running (a former colleague has installed this system). We have the following configuration: A Ubuntu based host on which our webserver runs within a qemu virtual machine. The following happens: Yesterday the host restarted (at the moment we don't know the reason) and since this restart libvirtd did not start up. How I found that out: When I try to start the virtual machine with "virsh start z-web" I get the error: "Connecting to uri: qemu:///session libvir: Remote error : unable to connect to '/var/run/libvirt/libvirt-sock': No such file or directory error: failed to connect to the hypervisor" As explained, I'm a total Newbie with libvirtd. So as far as I know, the libvirt-sock is generated by libvirtd when it's running. I don't know the right way how to start libvirtd. I tried it by just typing "libvirtd", but that generates this error: "libvirtd: symbol lookup error: libvirtd: undefined symbol: __virAlloc". I can't find any log-entry that gives me more information about this error. Does anybody can help me with this problem? In which logfiles does libvirtd normaly writes such errormessages? Or what can the problem be? If you need more information about the configuration or something else, I can find that out, if you tell me where ;) Thanks alot for your help! Kind regards, Steffen ________________________________ Steffen Langenbach IT-Administration Tel: +49 6151 50031-66 Fax: +49 6151 50031-40 Steffen.Langenbach(a)mechatronic.de [http://www.mechatronic.de/fileadmin/gfx/mechatronic_mail.jpg] ________________________________ Mechatronic AG • Wittichstraße 2, 64295 Darmstadt; DE • Tel +49 6151 50031-66 • Fax +49 6151 50031-40 ________________________________ Diese E-Mail enthält vertrauliche Informationen. Wenn Sie diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Die Anfertigung unerlaubter Kopien, die Weitergabe der Information sowie die unbefugte Weitersendung der E-Mail ist nicht gestattet. This e-mail contains confidential information. If you wrongly received this e-mail, please inform the sender immediately and delete this e-mail. Unauthorised copying, disclosure or distribution of this e-mail is strictly forbidden. Amtsgericht: Darmstadt, Sitz: Darmstadt, HRB 9437 Vorstand: Thomas Ullmann (Vors./CEO) Vorsitzender des Aufsichtsrats: Dr. Alexander Geilert

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[libvirt-users] how to setup libvirt with java bindings for use
by Dan Hirsch 27 Oct '11

27 Oct '11

Hi, I would like to use libvirt to manipulate virtual machines of different types (KVM, ESXi etc.) I added dependencies to my project the libvirt and jna jars. trying to execute your example code I am getting a run time exception saying the library cann't be found. it an actual libvirt c library is also required, and needs to be compiled separately? can you please write down all needed steps for using libvirt with java binding? thanks in advance.

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Re: [libvirt-users] virsh start VM failed
by Eric Blake 27 Oct '11

27 Oct '11

[re-adding the list] On 10/26/2011 09:37 AM, 邱敏鈴 wrote: > linux distribution : linux2.6.35-30-server version : ubuntu10.10 > > virsh # version > Compiled against library: libvir 0.8.3 > Using library: libvir 0.8.3 > Using API: QEMU 0.8.3 > Running hypervisor: QEMU 0.12.5 > > /var/log/libvirt/qemu/controlnode.log > LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin > QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 1024 -smp > 2,sockets=2,cores=1,threads=1 -name controlnode -uuid > ce48e7d5-de02-8faf-c829-9e000ca49b2b -nodefaults -chardev > socket,id=monitor,path=/var/lib/libvirt/qemu/controlnode.monitor,server,nowait > -mon chardev=monitor,mode=readline -rtc base=utc -boot c -drive > file=/vm/vm1/ubuntu-kvm/tmpkzLes0.qcow2,if=none,id=drive-ide0-0-0,boot=on,format=qcow2 > -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -device > virtio-net-pci,vlan=0,id=net0,mac=52:54:00:17:a2:d0,bus=pci.0,addr=0x3 -net > tap,fd=37,vlan=0,name=hostnet0 -usb -vnc 127.0.0.1:0 -vga cirrus -device > virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 > bind(unix:/var/lib/libvirt/qemu/controlnode.monitor): Permission denied > chardev: opening backend "socket" failed This part of the log looks suspicious. Could this be an installation issue, or perhaps AppArmor not configured correctly? > > virsh # dumpxml controlnode > <domain type='kvm'> > <name>controlnode</name> > <uuid>ce48e7d5-de02-8faf-c829-9e000ca49b2b</uuid> > <memory>1048576</memory> > <currentMemory>1048576</currentMemory> > <vcpu>2</vcpu> > <os> > <type arch='x86_64' machine='pc-0.12'>hvm</type> > <boot dev='hd'/> > </os> > <features> > <acpi/> > </features> > <clock offset='utc'/> > <on_poweroff>destroy</on_poweroff> > <on_reboot>restart</on_reboot> > <on_crash>destroy</on_crash> > <devices> > <emulator>/usr/bin/kvm</emulator> > <disk type='file' device='disk'> > <driver name='qemu' type='qcow2'/> > <source file='/vm/vm1/ubuntu-kvm/tmpkzLes0.qcow2'/> > <target dev='hda' bus='ide'/> > <address type='drive' controller='0' bus='0' unit='0'/> > </disk> > <controller type='ide' index='0'> > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > function='0x1'/> > </controller> > <interface type='bridge'> > <mac address='52:54:00:17:a2:d0'/> > <source bridge='br0'/> > <target dev='vnet0'/> > <model type='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > </interface> > <input type='mouse' bus='ps2'/> > <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'/> > <video> > <model type='cirrus' vram='9216' heads='1'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x02' > function='0x0'/> > </video> > <memballoon model='virtio'> > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' > function='0x0'/> > </memballoon> > </devices> > </domain> > > virsh # managedsave-remove controlnode couldn't help! Nothing in that XML jumped out as suspicious to me. And from the sound of your managedsave-remote not making a difference, my guess of a corrupt managed save image getting in the way is a red herring. I'm not sure what to suggest trying next. Maybe others can chime in... -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org

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[libvirt-users] virsh start VM failed
by 邱敏鈴 27 Oct '11

27 Oct '11

Dear, I encountered some problems when I used the virsh to start my virtual machines. I had tried some ways but I still couldn't solve it. Please help me, thanks. error messages : virsh # start controlnode error: Failed to start domain controlnode error: internal error process exited while connecting to monitor: bind(unix:/var/lib/libvirt/qemu/controlnode.monitor): Permission denied chardev: opening backend "socket" failed

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[libvirt-users] How to use "virsh migrat" with p2p option?
by Guangya Liu 25 Oct '11

25 Oct '11

Hi libvirt support, Can you please give me some example of how to use "virsh migrate --live" with p2p option including both source host and target host? I try to get some info from your website, but no info with migrate. [root@vmoactive02 qemu]# virsh help migrate NAME migrate - migrate domain to another host SYNOPSIS migrate [--live] [--p2p] [--direct] [--tunnelled] [--persistent] [--undefinesource] [--suspend] [--copy-storage-all] [--copy-storage-inc] <domain> <desturi> [<migrateuri>] [<dname>] DESCRIPTION Migrate domain to another host. Add --live for live migration. OPTIONS --live live migration --p2p peer-2-peer migration --direct direct migration --tunnelled tunnelled migration --persistent persist VM on destination --undefinesource undefine VM on source --suspend do not restart the domain on the destination host --copy-storage-all migration with non-shared storage with full disk copy --copy-storage-inc migration with non-shared storage with incremental copy (same base image shared between source and destination) [--domain] <string> domain name, id or uuid [--desturi] <string> connection URI of the destination host [--migrateuri] <string> migration URI, usually can be omitted [--dname] <string> rename to new name during migration (if supported) Thanks, Guangya

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[libvirt-users] Fwd: Re: Unable to acquire lock
by Trey Dockendorf 25 Oct '11

25 Oct '11

Accidentally sent to OP only. This has been with 0.8.7 on CentOS 6 CR that Ive had the problem. ---------- Forwarded message ---------- From: "Trey Dockendorf" <treydock(a)gmail.com> Date: Oct 24, 2011 12:31 AM Subject: Re: [libvirt-users] Unable to acquire lock To: "Jatin Kumar" <cs5090243(a)cse.iitd.ernet.in> On Mon, Oct 24, 2011 at 12:05 AM, Jatin Kumar <cs5090243(a)cse.iitd.ernet.in>wrote: > Hello, > I am trying to execute virsh commands on a host but it is giving errors > due to failure in acquiring lock. > > root@kvm01:~# virsh suspend blindone > error: Failed to suspend domain blindone > error: Timed out during operation: cannot acquire state change lock > > Any suggestions how can we figure out possible reasons. > > -- > Jatin > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users > I've run into this a few times when a snapshot hangs. Unfortunately I can't offer much advice on why it happens, but increasing log verbosity may help troubleshoot it. These are the relevant lines I use in /etc/libvirt/libvirtd.conf log_level = 2 log_filters="2:remote 2:event" log_outputs="2:file:/var/log/libvirt/libvirtd.log" Be careful with level 1 alerts...I generated a 100GB text log in 3 days. To fix that problem and unlock a VM, you need to kill libvirt, remove the PID files and start libvirt # service libvirtd stop # rm -rfv /var/run/libvirt # service libvirtd start More information here, https://bugzilla.redhat.com/show_bug.cgi?id=676205 - Trey

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[libvirt-users] renaming a domain
by Roberto Attias (rattias) 25 Oct '11

25 Oct '11

Hello, In my system a VM with a given domain name is defined and started. At a certain point I will define and start a new VM, with a different name. I then want to dispose of the old VM and rename the new one to the old one. Unfortunately I didn't find any API to do the last step. Is it possible to change the domain name of a running VM? Thanks, Roberto

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[libvirt-users] Unable to acquire lock
by Jatin Kumar 25 Oct '11

25 Oct '11

Hello, I am trying to execute virsh commands on a host but it is giving errors due to failure in acquiring lock. root@kvm01:~# virsh suspend blindone error: Failed to suspend domain blindone error: Timed out during operation: cannot acquire state change lock Any suggestions how can we figure out possible reasons. -- Jatin

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[libvirt-users] Running LXC instance as a non-root user
by Dong-In David Kang 25 Oct '11

25 Oct '11

Hello, I'm new to this mailing list. I have a question on running an LXC instance from libvirt as a non-root user. I saw libvirt can launch a QEMU instance as a non-root user by editing /etc/libvirt/qemu.conf configuration file via the user=$USERNAME and group=$GROUPNAME parameters. But, I could not find such options for LXC. Is there a way to run an LXC instance as a non-root user? If it is not possible, then could I run libivrtd itself as a non-root user? Thanks, David. ---------------------- Dr. Dong-In "David" Kang Computer Scientist USC/ISI

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[libvirt-users] VirtualBox 4.1 support
by Stefano Facchini 24 Oct '11

24 Oct '11

Is version 4.1 (and later) of VirtualBox supported by libvirt? -- Stefano Facchini <stefano.facchini(a)gmail.com>

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[libvirt-users] virsh modified option... alternative..
by vmnode guy 24 Oct '11

24 Oct '11

Hi All, I am new to libvirt, i wander how we can achieve below objective, i read through a lot from libvirt.org but couldn't found any thing solid something equivalent to this:- virsh dumpxml dom > /tmp/dom.xml $EDITOR /tmp/dom.xml && virsh define /tmp/dom.xml What i try to achieve is to have one management server that install with libvirt in place then we can use libvirt to connect to other libvirt box to provision the vm-create, vm-delete & capable to vm-modified the CPU,MEM,HDD,boot sequence, vnc password attached & detech network card..on the targeted VM. Currently we do it through editing the xml file which was a bit pain to do so.. Regards, Peter

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