[libvirt-users] [Libvir] libvirt & vde_switch

[Laine Stump]

On 04/28/2011 09:56 AM, Robert Šmol wrote:
> For my needs I would like to see either vdeswitch or openvswitch 
> integrated in the project. Is there any preference from the 
> users/developers on which one of those I should start looking into?

Are you volunteering to write some code? :-)

There have been requests for both, and both should eventually be done, 
so I guess pick whichever one you like better :-) (since there's already 
a patch for VDE, albeit with different XML than we'd like, that may be 
quicker to finish.)

You may want to follow development of the work I'll point out below, 
though, otherwise you could waste a lot of time.

>
> Also I would like to know how this should be integrated, from the 
> mails I can see devs prefers to have virtual switch present as a 
> network. Can someone describe how the integration should be done? 
> Support for additional features like vlan, QoS?

Once we get into these kinds of questions, it's probably best to switch 
to the developers' list (libvir-list at redhat.com) to get better exposure 
to people writing the code. I'm Cc'ing this message there (and switching 
the Reply-To: as well).

In particular, I recently send an RFC to libvir-list proposing an 
expansion of the <network> XML to remove the hard-coded connection 
between guest interface and host interface for macvtap (type='direct') 
interfaces:

    https://www.redhat.com/archives/libvir-list/2011-April/msg00591.html

and in a followup message showed how we could expand on this work to 
provide support for openvswitch (or vde):

    https://www.redhat.com/archives/libvir-list/2011-April/msg00640.html

I'm planning to have this code finished and tested within the next two 
months at most (hopefully considerably earlier). If you're interested in 
implementing a <network type='openvswitch'> or <network type='vde'> you 
should subscribe to libvir-list (if you aren't already) so that you can 
follow along.


>
> Robert
>
> On 04/06/2011 04:13 PM, Robert Šmol wrote:
>>
>>
>> On 04/06/2011 04:00 PM, Nicolas Sebrecht wrote:
>>> The 06/04/11, Robert Šmol wrote:
>>>> On 04/06/2011 10:34 AM, Nicolas Sebrecht wrote:
>>>>> The 05/04/11, Robert Šmol wrote:
>>>>>
>>>>>> I would like to ask about status of VDE and libvirt. I found a
>>>>>> thread from 
>>>>>> http://www.redhat.com/archives/libvir-list/2008-February/msg00030.html. 
>>>>>>
>>>>> AFAIK, vde_switch is still unsupported by libvirt and nobody seems to
>>>>> work on it these days.
>>>>>
>>>>> Most people wanting vde_switch (or open vswitch) enough leave 
>>>>> libvirt.
>>>>>
>>>> On #IRC I got point to message:
>>>>
>>>> http://www.mail-archive.com/libvir-list@redhat.com/msg32081.html
>>>>
>>>> It seems there is a patch ready. I will test it against 0.9.0. What
>>>> is the procedure to get the patch reviewed and eventually get into
>>>> libvirt?
>>> The patch wasn't merged but the why is a question to the maintainers. I
>>> guess the way it was implemented did not convinced. This is what I
>>> understand from the whole thread, at least.
>>>
>> From the thread it seems the maintainers would like to have a network 
>> based on VDE. To me it also looks like better idea (create vde 
>> network and then just attach the domain to a network.
>>
>