- Users - libvirt List Archives

[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 26 Oct '11

26 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 26 Oct '11

26 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 26 Oct '11

26 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 26 Oct '11

26 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 24 Oct '11

24 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) 24 Oct '11

24 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 24 Oct '11

24 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 24 Oct '11

24 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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