[Users] Question about network card order

[Itamar Heim]

On 10/03/2012 02:51 PM, Antoni Segura Puimedon wrote:
...

>>> Hello
>>>
>>>
>>> My first email on the mailing, I hope the first one of a longue
>>> serie.
>>>
>>
>> Welcome to community :)
>>
>>
>>>
>>> The email concerns a Network Card order issue for which I like to
>>> report a have your advises.
>>>
>>>
>>> I've made a template which contains 2 network cards, Each one
>>> bridge
>>> on different vlan network.
>>> When I create a VM from this template, the network card mac address
>>> assignation is random... so that by default my fedora assign eth0
>>> to
>>> the smallest mac address, and so on for eth1/eth2 ...
>>>
>>>
>>> But no way to define network card order in template, so that
>>> sometime
>>> the smallest mac address is on eth0, sometime on eth1 (and in fact
>>> more often on eth1), sometime my VM works, sometime I have to
>>> destroy and recreate network interfaces.
>>>
>>>
>>
>> Unfortunately it's a known issue that related mostly to guest kernel
>> rather than RHEV-M.
>> This is not related to order of NICs during VM start, because RHEV-M
>> keep the MAC assignment
>> and even PCI address assignment same over VM reboots.
>>
>> The real reason hidden somewhere deep in kernel/udev behaviour.
>> We need to understand why 2 NICs with same MAC addresses and same PCI
>> addresses may get different names (eth0/eth1)
>> over machine reboot.
>>
>> Michael, any ideas?
>>
>>
>>> Is there a workaround or anything else ?
>>>
>>
>> No, I am not aware of any workaround
>
> Wouldn't it be possible to write some matching rules in:
>      /etc/udev/rules.d/70-persistent-net.rules

maybe leverage cloud-init (or your own script) and payload as a 
workaround for now.
maybe worth solving this via cloud-init/payload as a built in solution.

>
> for your template so you would have it consistent. Mind that you should
> not rename to the kernel eth namespace.
>
> Best,
>
> Toni
>
>>
>>
>> Regards,
>> Igor
>>
>>
>>>
>>> Thanks
>>>
>>>
>>> Kévin
>>>
>>>
>>> --
>>>
>>> Kevin Mazière
>>> Responsable Infrastructure
>>> Alter Way – Hosting
>>> 1 rue Royal - 227 Bureaux de la Colline
>>> 92213 Saint-Cloud Cedex
>>> Tél : +33 (0)1 41 16 38 41
>>> Mob : +33 (0)7 62 55 57 05
>>> http://www.alterway.fr
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>
>>
>>
>>
>> --
>>
>> Kevin Mazière
>> Responsable Infrastructure
>> Alter Way – Hosting
>> 1 rue Royal - 227 Bureaux de la Colline
>> 92213 Saint-Cloud Cedex
>> Tél : +33 (0)1 41 16 38 41
>> Mob : +33 (0)7 62 55 57 05
>> http://www.alterway.fr
>>
>> _______________________________________________
>> Users mailing list
>> Users at ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
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