[openstack-dev] [Quantum] Re: L3 API blueprint for G3

Gary Kotton gkotton at redhat.com
Fri Jan 11 18:27:33 UTC 2013

On 01/11/2013 01:00 PM, Salvatore Orlando wrote:
> Hi Bob,
> the blueprint I had in mind has actually a fairly small scope.
> It should touch just the APIs side.
> I'm writing the full spec, but basically the goal is:
> - Move the l3 methods interface into quantum_plugin_base_v2.py
>    * It will be kept as a separate class so that when L2 and L3 plugins
> will be split we won't have to split the base plugin class
> - Do not load anymore l3 APIs an extension, but move resources, and
> validators, into quantum/api/v2

Not related but if we are going to consider removing the l3 api as an 
extension, then I stringly think that we should also remove the provider 
networks as a extension. Any thoughts?

>    * this requires ensuring all plugins supports L3 APIs.
> "NotImplementedExceptions" are forbidden in Quantum!
> - Harmonize the DB model
>    * ie: make 'external' just an attribute of the network object,
> without using an association table as we do now
>    * and adjust all the code which uses this attribute (danwent did a
> good job of encapsulating this in a few routines, so it should be
> easy)
>    * ... and write the corresponding migration scripts!
> - Ensure backward compatibility (e.g.: router:external and just
> 'external' on network should both work)
> - Remove 'extend_l3_network_dict', 'process_l3_xxxx' as we won't need
> them anymore. (Note: those are not actually related to the l3
> features, but rather to extension to l2 resources added by the l3
> apis)
> I plan to leave quantum/db/l3_db as it is. I don't think it will be
> convenient to merge it into db_base_plugin_v2.QuantumDBPluginV2. This
> because it might make separation of l2/l3 plugins harder, and will
> create a behemoth class that we really don't need to have.
> Summarizing, my opinion is that we probably can make progress on these
> two work items in parallel, as there's not a strict dependency.
> However, your input is more than welcome, especially as far as the
> changes to the plugin interface and the db support classes are
> concerned.
> I shall have the definite spec ready for the next Quantum meeting. Is
> there a chance you could draft a full spec for your blueprint as well?
> Salvatore
> On 11 January 2013 11:17, Bob Melander (bmelande)<bmelande at cisco.com>  wrote:
>> Oops my mistake. Thanks for you keen eye. :-)
>> Do you have any opinion about my suggestion?
>> Thanks,
>> Bob
>> From: Dan Wendlandt<dan at nicira.com>
>> Reply-To: OpenStack Development Mailing List
>> <openstack-dev at lists.openstack.org>
>> Date: torsdag 10 januari 2013 19:47
>> To: OpenStack Development Mailing List<openstack-dev at lists.openstack.org>
>> Subject: [openstack-dev] [Quantum] Re: L3 API blueprint for G3
>> Adding Quantum to subject line to help with all of those using filters :)
>> On Thu, Jan 10, 2013 at 10:20 AM, Bob Melander (bmelande)
>> <bmelande at cisco.com>  wrote:
>>> Hi Salvatore,
>>> Your "L3 API to core" blueprint
>>> (https://blueprints.launchpad.net/quantum/+spec/l3apis-into-core) is
>>> targeted for G3. Are you planning to implement it?
>>> I have made some comments to your blueprint regarding the case when the L3
>>> functionality would be provided by a service plugin (as proposed by this
>>> blueprint:
>>> https://blueprints.launchpad.net/quantum/+spec/quantum-l3-routing-plugin). I
>>> outline how the current L3 functionality can be provided either as separate
>>> L3 plugin or as now, provided by the core plugin (depending on the choice of
>>> the core plugin developer).
>>> How about if we try to get both your "L3 API to core" blueprint and the
>>> "L3 to plugin" blueprint implemented for G3? I'm willing to work on this to
>>> make it happen.
>>> / Bob
>>> _______________________________________________
>>> OpenStack-dev mailing list
>>> OpenStack-dev at lists.openstack.org
>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>> --
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> Dan Wendlandt
>> Nicira, Inc: www.nicira.com
>> twitter: danwendlandt
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> _______________________________________________
>> OpenStack-dev mailing list
>> OpenStack-dev at lists.openstack.org
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