Open Stack

Yoshisato,

My team has been looking at this problem as well.  As you would expect,
Dan's explanation is right on target here.  Its relatively straightforward
to write a Quantum plugin that implements the python API and speaks to some
other component (which can vary quite a bit in complexity) that speaks
OpenFlow.

We're going to try to document our experience as plugin writers as well and
publish it along with some open source example code.

Mike Cohen
Big Switch Networks


On Mon, Oct 31, 2011 at 2:42 PM, Dan Wendlandt <dan at nicira.com> wrote:

>
>
> On Fri, Oct 28, 2011 at 10:58 PM, Yoshisato Ushio <
> yoshisato.ushio at gmail.com> wrote:
>
>> Hello Folks,
>> I am interested in the use of OpenFlow technology with OpenStack. But
>> honestly speaking, I have no deep expertise in OpenStack.Then let me ask
>> questions.
>>
>> Q1) In order to use openflow features with OpenStack, such as, Open
>> vSwitch or OpenFlow capable HW switches, can I assume that all I should do
>> for this is to develop a quantum plugin module for openflow under nova
>> manager ?
>>
>
> Hi Yoshisato,
>
> If you are trying to enable the use of OpenStack with a new network
> switching technology, then yes, developing a Quantum plugin is the right
> way to go.  It may be possible to leverage work done by others writing
> similar plugins though.
>
> Since our developer documentation as-of-yet non-existent, I whipped up a
> quick wiki page with some advice on developing a plugin:
> http://wiki.openstack.org/QuantumDevelopment . Others should feel free to
> expand on this page.
>
> Also, just to clarify one thing though: Quantum is actually a separate
> codebase + runtime process from Nova, so you shouldn't need to modify Nova
> itself.
>
>
>
>> Q2) Are there any open-source codes of quantum plugin for openflow ?
>>
>
> I doubt that there will be one canonical "openflow plugin" for Quantum, as
> OpenFlow itself is really just a protocol to talk to a (virtual or
> physical) switch's forwarding table.  There are many different ways to
> build a Quantum plugin that uses OpenFlow, each of which make different
> trade-offs in terms of scalability, fault-tolerance, complexity,
> feature-richness, etc.  You can probably start out by taking a look at some
> of the existing plugins and seeing what ideas you can "borrow" with respect
> to your own implementation.  Feel free to send email to the netstack list
> if you have more detailed questions.
>
> Dan
>
>
>>
>> Any advice would be greatly appreciated,
>> Yoshisato Ushio
>>
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>
>
> --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Dan Wendlandt
> Sr. Product Manager
> Nicira Networks: www.nicira.com
> cell: 650-906-2650
> twitter: danwendlant
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
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