Am 21.04.15 um 03:44 schrieb Chengyuan Li: > Hi Eric, > > Thanks! > You are right, I missed declaring namespace, now, the <qemu:commandline> is > saved after virsh edit. Nice. Can you give a full example? Also are the limitations still the same as of 2013? This is what the internet is telling me. - Image formats are not supported (qcow2, qed, etc). - Live migration is not supported. - QEMU I/O throttling is not supported but cgroups blk-io controller can be used. - Only the default "report" I/O error policy is supported (-drive werror=,rerror=). - Hot unplug is not supported. - Block jobs (block-stream, drive-mirror, block-commit) are not supported. cheers t. > Regards, > CY. > > On Mon, Apr 20, 2015 at 11:41 PM, Eric Blake <eblake@xxxxxxxxxx> wrote: > >> On 04/20/2015 08:37 AM, Chengyuan Li wrote: >> > Hi, >> > >> > I tried to enable virtio-blk data plane feature for VMs in my openstack >> > environment, the hypervisor is ubuntu 14.04, libvirt 1.2.2 and QEMU 2.0. >> > As nova doesn't support that parameter yet, I did belows >> > >> > 1. nova boot a VM with raw disk image. >> > 2. nova stop the VM. >> > 3. run "virsh edit <instance-id>" on the hyprvisor node, and adding below >> > into instance xml just before </domain>. >> > >> > However, the <qemu:commandline> part is ignored and not saved after >> closing >> > virsh edit, seems that libvirt rejected these changes. Is there any XML >> > syntax error here? Or libvirt doesn't support <qemu:commandline> tag? >> >> If XML changes disappear after virsh edit, then it is a case of you >> using XML that wasn't recognized by libvirt. >> >> > >> > <qemu:commandline> >> > <qemu:arg value='-set'/> >> > <qemu:arg value='device.drive-virtio-disk0.x-data-plane=on'/> >> > </qemu:commandline> >> >> Did you also remember to declare the namespace? Per >> http://libvirt.org/drvqemu.html#qemucommand >> >> it is essential to have something like: >> >> <domain type='qemu' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0 >> '> >> >> before any other <qemu:...> will be recognized. (The namespace does not >> have to be named 'qemu:', but it makes it easier to stick to the naming >> used by the examples) >> >> -- >> Eric Blake eblake redhat com +1-919-301-3266 >> Libvirt virtualization library http://libvirt.org >> >> > > > > _______________________________________________ > libvirt-users mailing list > libvirt-users@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/libvirt-users > _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
