[RFE] neutron_dynamic_routing project is bound to rpc driver closely

[Yang Yu]

The interface https://github.com/openstack/neutron-dynamic-routing/blob/master/neutron_dynamic_routing/services/bgp/bgp_plugin.py is bound to rpc driver so closely, it is not suitable to extend the BGP driver which is agentless.

So we need to do following steps:

1> Refactor the code to support agentless driver
2> Using service_providers method to load the different driver
3> Deliver an overall agent driver interface so that some agent driver such as quagga and ryu are easy to be load.

For this refactor, I added followings in my patch https://review.openstack.org/#/c/349921/.

1> Add a new configuration file named neutron_dynamic_routing.conf to provider the service_providers configuration.
2> The neutron-bgp-dragent binary will invoke the neutron_dynamic_routing.conf file.
3> The default service_providers will be DYNAMIC_ROUTING:RPCDriver:neutron_dynamic_routing.services.bgp.service_drivers.rpc_bgp.BgpRpcPluginDriver:default
4> Now the bgp_plugin.py will be a unified the interface to invoking the dynamic routing, the rpc_bgp.py will be a agent driver and be responsible for interact with lower layer interface such as ryu/quagga.

[Yang Yu (yuyangbj)]

https://review.openstack.org/#/c/349921/

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/373029

[vikram.choudhary (vikschw)]

Request looks reasonable to me.. Hence, +1 from my end.

[YAMAMOTO Takashi (yamamoto)]

midonet want to use this if possible.
it currently provides the whole bgp plugin. [1]

[1] https://github.com/openstack/networking-midonet/blob/37b632f3bf3211512f5fda45623c2d302eef6a51/midonet/neutron/services/bgp/plugin.py

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/373029
Committed: https://git.openstack.org/cgit/openstack/neutron-specs/commit/?id=57f92340c9ba8a72431b4e57989d4831df385700
Submitter: Jenkins
Branch: master

commit 57f92340c9ba8a72431b4e57989d4831df385700
Author: yuyangbj <email address hidden>
Date: Tue Sep 20 16:11:55 2016 +0800

    Support agentless driver in neutron-dynamic-routing

    Some BGP driver is agentless, but the neutron-dynamic-routing is
    bound to RPC driver so closely. So the codes need to be refactored.

    Change-Id: Id134faa2d08369a7ad7aab1d353b83b1fbc4d48f
    Related-Bug: #1611632

[OpenStack Infra (hudson-openstack)]

Change abandoned by boden (<email address hidden>) on branch: master
Review: https://review.openstack.org/349921
Reason: we no longer need this support

[Launchpad Janitor (janitor)]

[Expired for neutron because there has been no activity for 60 days.]