Re: qemu-1.5.0 savevm error -95 while writing vm with ceph-rbd as storage-backend

[Oliver Francke <Oliver.Francke@filoo.de>]

Hi Alexandre, Josh,

sorry for coming back so very late, I tried the patch and though I could 
not get it to work properly - very likely my fault - how would it be to 
integrate it into the rbd-handler of qemu?

Josh? I think you are CC'd from another qemu-ticket anyway?

I could just ignore the EOPNOTSUPP or whatever it's called, but a smooth 
integration of live-snapshots would be so cool ;)

Kind regards,

Oliver.

On 05/24/2013 05:37 PM, Alexandre DERUMIER wrote:
> Hi,
>
> For Proxmox, we have made some patchs to split the savevm process,
>
> to be able to save the memory to an external volume. (and not the current volume).
>
> For rbd, we create a new rbd volume to store the memory.
>
> qemu patch is here :
> https://git.proxmox.com/?p=pve-qemu-kvm.git;a=blob;f=debian/patches/internal-snapshot-async.patch;h=c67a97ea497fe31ff449acb79e04dc1c53b25578;hb=HEAD
>
> ----- Mail original -----
>
> De: "Wido den Hollander" <wido@42on.com>
> À: "Oliver Francke" <Oliver.Francke@filoo.de>
> Cc: ceph-devel@vger.kernel.org
> Envoyé: Vendredi 24 Mai 2013 17:08:35
> Objet: Re: qemu-1.5.0 savevm error -95 while writing vm with ceph-rbd as storage-backend
>
> On 05/24/2013 09:46 AM, Oliver Francke wrote:
>> Hi,
>>
>> with a running VM I encounter this strange behaviour, former
>> qemu-versions don't show up such an error.
>> Perhaps this comes from the rbd-backend in qemu-1.5.0 in combination
>> with ceph-0.56.6? Therefore my
>> crosspost.
>>
>> Even if I have no real live-snapshot avail - they know of this
>> restriction -, it's more work for the customers
>> to perform a shutdown before the wonna do some changes to their VM ;)
>>
> Doesn't Qemu try to save the memory state to RBD here as well? That
> doesn't work and fails.
>
>> Any hints welcome,
>>
>> Oliver.
>>
>


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Oliver Francke

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