November 2014 - Users - Libvirt List Archives

[libvirt-users] Suspend Domain (virsh suspend) or Freeze Filesystems (virsh domfsfreze) to take Snapshot of ISCSI volume

by Payes Anand

Hi everybody, I am trying to take snapshot of a particular iscsi disk mounted inside the guest operating system. I have created my own snapshot feature for that. Could someone please suggest the better choice for stopping read/write operations on disk out of the two to take snapshots, or if you have any better solution, 1) freeze filesystems ( using domfsfreeze ) and then take the snapshot or, 2) suspend the VM ( using virsh suspend ) and then take the snapshot And, before taking the snapshots what other operations should i perform ( like sync or flush buffer ) for a consistent snapshot. Any help would be greatly appreciated. Best Regards, Payes

10 years, 1 month

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[libvirt-users] Trouble creating virtio-serial device

by David Richardson

Hello, I've running Ubuntu-14.04 as my host and my guest. I've been trying to get guest to host communication set up by configuring a virtio-serial device. My xml file contains: <channel type='unix'> <source mode='bind' path='/home/dave/vm1.agent'/> <target type='virtio' name='vm1'/> </channel> When I start up the VM, I get the following error: error: Failed to create domain from vm1.xml error: internal error: process exited while connecting to monitor: qemu-system-x86_64: -chardev socket,id=charchannel0,path=/home/dave/vm1.agent,server,nowait: Failed to bind socket: Permission denied qemu-system-x86_64: -chardev socket,id=charchannel0,path=/home/dave/vm1.agent,server,nowait: chardev: opening backend "socket" failed dmesg shows what appears to be an apparmor denial for mknod: [250108.632450] type=1400 audit(1415994657.679:152): apparmor="DENIED" operation="mknod" profile="libvirt-2fd2ec54-f644-228e-08ba-297c8b304153" name="/home/dave/vm1.agent" pid=21856 comm="qemu-system-x86" requested_mask="c" denied_mask="c" fsuid=112 ouid=112 I can add a line to /etc/apparmor.d/abstractions/libvirt-qemu similar to: owner /home/dave/vm1.agent rw, After restarting apparmor, this gets rid of the apparmor complaint, but I still get the same error from 'virsh create vm1.xml' when trying to create the VM. Any suggestions for how to fix this? Thanks, ~Dave

10 years, 1 month

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[libvirt-users] hostdev a Xeon Phi

by lejeczek

hi everybody I'd like to ask around if Xeon Phis are any good for passthrough? Are there any plans for near future or maybe there are already some success stories using this product? many thanks, P.

10 years, 1 month

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[libvirt-users] Is there a way to disable libvirt qemu monitor while creating kvm vm using virsh?

by Min Du

Hi, Now for some reason, I need to add “ -qmp tcp:127.0.0.1:1235” when creating a KVM VM using libvirt. This command meaning in “qemu-kvm --help” is: -qmp dev like -monitor but opens in 'control' mode. I added command-line equivalent options into the xml file, like below format: <qemu:commandline> <qemu:arg value="-s"/> <qemu:arg value="-qmp"/> <qemu:arg value="tcp:127.0.0.1:1235"/> </qemu:commandline> However when I create VM using this xml file, I got the error: # virsh create instance-libvirt.xml error: Failed to create domain from instance-libvirt.xml error: internal error process exited while connecting to monitor: qemu-kvm: -qmp tcp:127.0.0.1:1235: Duplicate ID 'monitor' for mon duplicate chardev: monitor The VM I created, without “—qmp” option, has below options showing in “ps aux | grep qemu-kvm”: -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/vmifs_test.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control Looks like libvirt automatically adds the monitor options upon VM creation. Is there a way to disable this and use “—qmp” instead when creating VM? Thanks for your help. Best Regards, Min

10 years, 1 month

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[libvirt-users] TCP or TLS Connection error

by Ajitha Robert

Hi all i am using libvirt 1.2.0 with xen hypervisor 4.4.. I am facing error while remotely connecting other libvirt using TCP or TLS. I couldnt make libvirt to listen to the port.. I installed libvirt from source in debian. I enabled --listen option by uncommenting LIBVIRTD_ARGS="--listen" /opt/libvirt-1.2.1/daemon/libvirtd.sysconf .. I killed the current libvirt. and started the daemon again.. when i gave ps aux | grep libvirtd the listen is not enabled.. Pls guide me -- *Regards,Ajitha R*

10 years, 1 month

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[libvirt-users] net passthrough (hostdev) and external DNS problem - libvirt host claims DNS update

by lejeczek

hi everybody I'm having I pretty regular setup, so I'd like to think. Guest network is to use passthrough and a DNS+DHCP on a neighbour system gets requests and then DHCP updates DNS records but with libvirt host's name instead of guest's. Am I missing something here? How do make a guest claim DNS update and the not host on which that guest is running? many thanks P.

10 years, 1 month

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[libvirt-users] Post upgrade/s issues with xen, libvirt, and virt-manager.

by Willie Hein WJ3G

Greetings, I've been suffering from some problems after upgrading my system, and not once but twice. I've been posing my findings in the vender's forum https://forums.opensuse.org/showthread.php/502307-openSUSE-13-1-gt-13-2-u.... On there you will also find a link to findings of the first upgrade. Maybe you've seen these errors, or have ideas on what's missing in my config. Any help would be greatly appreciated. Willie

10 years, 1 month

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[libvirt-users] migrate works for xen4.4?

by Ajitha Robert

Hi all, i m using xen 4.4.0 as hypervisor with libvirt 1.2.0. When i tried with migrate command i m facing certain issues.. I need to ensure whether libvirt supports xen 4.4? -- *Regards,Ajitha R*

10 years, 1 month

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[libvirt-users] hvm in xen via libvirt.

by cool dharma06

hi all, i am using libvirt-1.2.5. i launched my VM(pv) in xen. its worked. But when i tried to launch HVM its not able to launch. i am facing some error. Please suggest me some solutions. thanks& regards, cooldharm06 ..:)

10 years, 1 month

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[libvirt-users] php api binding for setting interface link flags (up/down).

by Vasiliy Tolstov

Hello. I can't see in php api reference info about setting port status of interface. virsh have comands virsh domif-setlink, but php api does not have link funstions. Please add this interface, bacause it very useful - then we need to disable some vps, but not want to shutdown it. Thanks! -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

10 years, 1 month

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Users November 2014