On 11/19/2012 03:23 PM, Nux! wrote:
On 19.11.2012 14:56, Pádraig Brady wrote:
> On 11/18/2012 08:22 PM, Nux! wrote:
>> Hi,
>>
>> I notice the VMs are not using the virtio type NICs, but some "Ethernet
controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+".
>> In my experience the virtio device is quite stable, any reason why it's not
default? I see that for block device virtio is default.
>
>
> This is something we should look at changing by default I think.
> There have are some kernel bugs precluding this:
>
https://bugzilla.kernel.org/show_bug.cgi?id=42829
> But Red Hat based kernels should be good in this area.
>
> It seems like it's a big global flag in nova.conf currently:
> libvirt_use_virtio_for_bridges = True
> Ideally that would be a property of the guest image,
> i.e. a tag in glance or something.
>
> thanks,
> Pádraig.
Thanks Pádraig, that worked!
Indeed I understand virtio_net is not default due to some ubuntu kernel bugs or such
like.
Also it needs guest support, so for widest range of guest support
I suppose we couldn't change the global default.
Also for installations with very disparate guest images,
the per image attributes would be needed, and
allow more tuned config.
thanks,
Pádraig.