[libvirt] ceps-based backing stores
Lyssa P. Livingston
lyssa at pistoncloud.com
Thu Oct 30 16:43:43 UTC 2014
Thanks. I’ll be looking for the patch.
Lyssa
> On Oct 30, 2014, at 03:03, Peter Krempa <pkrempa at redhat.com> wrote:
>
> On 10/30/14 01:15, Lyssa P. Livingston wrote:
>> I have a file with an ceph-based backing store. I run this command:
>>
>> nova boot vm-clone
>>
>> where vm-clone is the rbd-backed file. It generates this command:
>>
>> qemu-img create -f qcow2 -b rbd:rbdpool/disk/instance-00000002.0.disk:conf=/etc/ceph/ceph.conf:id=admin -F raw /mnt/novadisk/nova/instances/3efa8a7b-75a8-4695-8fdd-659185c46b7d/disk
>>
>> and I am getting this error:
>>
>> error: internal error: backing store parser is not implemented for protocol rbd
>
> Libvirt is parsing the information saved in the backing store field of
> an image to re-create the backing chain structure in memory.
> Unfortunately I didn't implement all the possible formats for this as
> there's a lot of them and one of the missing pieces is the colon syntax
> for RBD volumes.
>
> I'll try to come up with a patch for this that will allow to recognize
> the RBD volume as a remote one where libvirt isn't able to access it and
> allow to start the VM.
>
>>
>> I was under the impression that qemu could work with ceph-based backing stores, so is there something I should run first, or files that I should patch, or ... ??? I am running libvirt 1.2.9. Thanks for any assistance you can provide.
>
> Qemu is able to handle those. Libvirt currently doesn't support the syntax.
>
>>
>> Lyssa
>>
>
>
> Peter
>
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>
>
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