[pve-devel] Qemu / virtio-rng-pci

[Stefan Priebe - Profihost AG]

Am 02.06.2015 um 06:29 schrieb Alexandre DERUMIER <aderumier at odiso.com>:

>>> Me too but we can't rely on the qemu version.
>>> 
>>> I can upgrade qemu / pve than live migrate from 2.2 to 2.3 but I'm still without virtio-rng. While doing next live migration it will fail.
> 
> Well, the patch check the version of qemu or the machine option or forcemachine from qemu live migration.

Ah ok sorry didn't saw this. But I still think it's bad to rely on qemu versions. What about a pve compatibility flag in the conf file which gets only reset on a fresh start? Might be also useful for suspends or snapshots? So it would be possible to change options or defaults without the need to change qemu version?

Stefan

> 
> So it should always be the same version until we stop/start the vm right ?
> 
> 
> ----- Mail original -----
> De: "Stefan Priebe" <s.priebe at profihost.ag>
> À: "dietmar" <dietmar at proxmox.com>
> Cc: "aderumier" <aderumier at odiso.com>, "pve-devel" <pve-devel at pve.proxmox.com>
> Envoyé: Lundi 1 Juin 2015 18:45:14
> Objet: Re: [pve-devel] Qemu / virtio-rng-pci
> 
> Am 01.06.2015 um 17:39 schrieb Dietmar Maurer <dietmar at proxmox.com>: 
> 
>>>>> Sure. I'm just thinking about the check regarding Qemu 2.3. I would also 
>>>>> like to use it for older qemu versions / installations.
>>>> 
>>>>> Is there no other way to support it and not to break live migration?
>>> 
>>> I don't see how to do it, adding a new pci device by default will break live 
>>> migration. 
>>> Or we need to add a new option in vmid.conf 
>>> 
>>> @Dietmar : any opinion ?
>> 
>> I don't really want a new option for that...
> 
> Me too but we can't rely on the qemu version. 
> 
> I can upgrade qemu / pve than live migrate from 2.2 to 2.3 but I'm still without virtio-rng. While doing next live migration it will fail. 
> 
> Stefan 
> 
>>