- Users - libvirt List Archives

Re: [libvirt-users] backup procedure using blockcopy
by Thomas Stein 03 Jul '13

03 Jul '13

> virsh dumpxml --security-info dom > dom.xml > virsh undefine dom Hello. Someone was talking about this (undefining the VM) would not be neccessary anymore when qemu-1.5 has been released. Is that true? > virsh blockcopy dom vda /path/to/backup-vda > polling loop - check periodically until 'virsh blockjob dom vda' > shows 100% completion > virsh suspend dom > virsh save dom /path/to/memory-backup --running This does not work for me. hn ~ # virsh blockjob gentoo-template vda Block Copy: [100 %] hn ~ # virsh save gentoo-template /opt/virt-backup-blockcopy/gentoo-template/gentoo-template-memory-backup --running error: Failed to save domain gentoo-template to /opt/virt-backup-blockcopy/gentoo-template/gentoo-template-memory-backup error: Requested operation is not valid: domain has an active block job Obviously i can not save while the blockjob is running. cheers t.

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[libvirt-users] How to set cpuset.cpus dynamically?
by Peeyush Gupta 03 Jul '13

03 Jul '13

Hi all, I have been trying to run a VM on some particular cpu cores. Now the thing is I can set cpuset with virt-install and that will reflect in VM's XML and it will define the affinity. But what about cpuset.cpus? That is inherited directly from the parent. Is there any way to set it when launching the VM? Again, if I have given cpuset during virt-install, why doesn't cpuset.cpus reflect the value instead of inheriting it from parent? Thanks. ~Peeyush Gupta

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[libvirt-users] Not able to create two cpusets with exclusive access
by Peeyush Gupta 02 Jul '13

02 Jul '13

Hi all, I am trying to set up exclusive cpu access for two different VMs. Now, in the hierarchy, the directories of both the VM's are inside /libvirt/qemu/$VM. I have 3 cpus on my machine. I have done echo 0 > cpuset.cpus and echo 1 > cpuset.cpu_exclusive for one VM. Now, I am launching another VM using virt-install and I have given the option --cpuset 1. There is no overlapping of cpus here, but still libvirt is showing error that it's unable to create cgroup for the new VM. Is it possible to have two exclusive cpusets inside a same hierarchy? ~Peeyush Gupta

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[libvirt-users] cpuset attribute not working with virt-install
by Peeyush Gupta 02 Jul '13

02 Jul '13

Hi all, I have been trying to use cpuset with virt-install. I am using the following command: $ virt-install --virt-type kvm --name Ubuntu13 --ram 1024 --cdrom=/home/peeyush/Downloads/ubuntu-13.04-desktop-i386.iso --cpuset=0,2 --disk path=/var/lib/libvirt/guest.qcow2,size=10,format=qcow2 Now, according to virt-install man page, my VM's cpu affinity should be set to pcpu 0 and 2 . But when I did virsh vcpuinfo $VM, it shows that the affinity is to all cpus. I checked the xml file of my VM and it has the cpuset attribute, but still my VM is running on all cpus. ~Peeyush Gupta

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[libvirt-users] nova-compute, libvirt and authentication
by Maciej Gałkiewicz 02 Jul '13

02 Jul '13

Hello I have a question about live migration when libvirt requires sasl authentication. I have managed to configure remote access for user nova with sasl enabled (credentials stored in auth.conf - https://review.openstack.org/#/c/12706/) It looks like live migration do not use these credentials at all. What is more it thinks that sasl is not not configured: 2013-07-01 09:49:09.317+0000: 17997: error : virNetSASLSessionClientStart:484 : authentication failed: Failed to start SASL negotiation: -4 (SASL(-4): no mechanism available: No worthy mechs found) 2013-07-01 09:49:09.317+0000: 17997: error : doPeer2PeerMigrate:2527 : operation failed: Failed to connect to remote libvirt URI qemu+tcp://n12c1/system I execute migration like this: nova live-migration c923af69-4cb3-46dd-8bd2-871812d7d223 n12c1 Nova.conf: live_migration_flag=VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,VIR_MIGRATE_LIVE Could you please let me know whether nova/libvirt support p2p live migration with sasl and if so point out what might be misconfigured? Disabling sasl solves all my problems but I have to configure some authentication. I would really appreciate your help. regards -- Maciej Gałkiewicz Shelly Cloud Sp. z o. o., Sysadmin http://shellycloud.com/, macias(a)shellycloud.com KRS: 0000440358 REGON: 101504426

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[libvirt-users] Same credentials stored in auth.conf for many servers
by Maciej Gałkiewicz 01 Jul '13

01 Jul '13

Hello According to client authentication in documentation ( http://libvirt.org/auth.html) it is possible to store credentials in auth.conf file and make appropriate mappings to servers: [auth-$SERVICE-$HOSTNAME] credentials=$CREDENTIALS Is it possible to use the same credentials for many servers without explicitly describing it? For example replacing: [auth-libvirt-myhost1] credentials=mycred [auth-libvirt-myhost2] credentials=mycred with: [auth-libvirt-myhost*] credentials=mycred or [auth-libvirt-any] credentials=mycred regards -- Maciej Gałkiewicz Shelly Cloud Sp. z o. o., Sysadmin http://shellycloud.com/, macias(a)shellycloud.com KRS: 0000440358 REGON: 101504426

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[libvirt-users] VMware distributed port groups..Supported?
by Morgan McLean 01 Jul '13

01 Jul '13

Hi, I installed libvirt on CentOS 6 today, only to find I could create the volume, create the VM, but could not assign the interface to a distributed port group. I then downloaded the latest source, compiled, and it looks to be the same...unless its under a command I'm not recognizing? Does anybody have the great tip that is going to set me free? I hope? Everything we use is on the vSwitches, as we run 60-80 VLAN's to each cluster member. -- Thanks, Morgan

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[libvirt-users] add support to vde2
by Rodolfo Andres 30 Jun '13

30 Jun '13

what about add support to vde2??, in vde2-svn you can find a patch but is outdated, try to apply to current version but lots of rej. sadly im not a dev so cant help.. Regards. --

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[libvirt-users] managedsave results in unexpected shutdown from inside Windows
by Nicolas Sebrecht 28 Jun '13

28 Jun '13

Hi, I'm facing a strange behaviour of windows 2008 guests. After a virsh managedsave and start, the windows guest open a "unexpected shutdown" window. The window looks like this one (randomly taken from the web): http://toastytech.com/guis/srv2k3login2.jpg This happens in all virtualized windows in a hypervisor. Has anyone else experienced such issue? Thanks, -- Nicolas Sebrecht

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[libvirt-users] qemu-img convert to "sparse" LV
by Edoardo Comar 28 Jun '13

28 Jun '13

Apologies as this is is not a specific libvirt question. Is qemu-img convert compatible with thin-provisioned LVs as targets ? I wanted to convert a file-based image to a LV image where the file-based image has a capacity much larger than the actual data it contains, so it has a small footprint on disk (either a qcow2 or a raw, but sparse, image). If I use qemu-img convert -O raw ... with a target LV sized to the full capacity of the file-image, all is fine. But if I try use an LV whose virtual size equals the capacity, but its size is smaller (although more than enough for the data) the LV is invariably corrupt. If I try use a thin-provisioned LV pool, and a LV backed by that pool, the LV resulting from qemu-img convert is not corrupt but it uses as much space as the file-image capacity it came from. This on both RHEL64 and Fedora18. -------------------------------------------------- regards, Edoardo Comar WebSphere Application Service Platform for Networks (ASPN) ecomar(a)uk.ibm.com +44 (0)1962 81 5576 IBM UK Ltd, Hursley Park, SO21 2JN Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

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