neutron

History

Bence Romsics ab07b91b1a Implement extension: extraroute-atomic I avoided changing the pre-existing extraroute implementation to also avoid any breakage of legacy behavior. Alternatively we can refactor the extraroute code to better fit both APIs: * the old: updates to the 'routes' attribute and * the new: actions 'add_extraroutes' / 'remove_extraroutes'. Change-Id: Ia78e0e02de4a42a056e3ff654d8b6976a4e52616 Closes-Bug: #1826396 (rfe) Depends-On: https://review.opendev.org/679259 Related-Change: https://review.opendev.org/655680 (spec)		2019-09-11 13:58:47 +02:00
..
service_providers	Start enforcing E125 flake8 directive	2019-07-19 23:39:41 -04:00
README	Adopt neutron-lib plugin directory	2016-11-23 04:45:33 -07:00
__init__.py	Empty files should not contain copyright or license	2014-10-20 00:50:32 +00:00
l3_router_plugin.py	Implement extension: extraroute-atomic	2019-09-11 13:58:47 +02:00

README

This service plugin implements the L3 routing functionality (resources router
and floatingip) that in earlier releases before Havana was provided by core
plugins (openvswitch, linuxbridge, ... etc).

Core plugins can now choose not to implement L3 routing functionality and
instead delegate that to the L3 routing service plugin.

The required changes to a core plugin are in that case:
- Do not inherit 'l3_db.L3_NAT_db_mixin' (or its descendants like extraroute)
  anymore.
- Remove "router" from 'supported_extension_aliases'.
- Modify any 'self' references to members in L3_NAT_db_mixin to instead use
  'directory.get_plugin(constants.L3)'
  For example,
     self.prevent_l3_port_deletion(...)
  becomes something like
     plugin = directory.get_plugin(constants.L3)
     if plugin:
         plugin.prevent_l3_port_deletion(...)

If the core plugin has relied on the L3Agent the following must also be changed:
- Do not inherit 'l3_rpc_base.L3RpcCallbackMixin' in any '*RpcCallbacks' class.
- Do not be a consumer of the topics.L3PLUGIN topic for RPC.

To use the L3 routing service plugin, add
'neutron.services.l3_router.l3_router_plugin.L3RouterPlugin'
to 'service_plugins' in '/etc/neutron/neutron.conf'.
That is,
service_plugins = neutron.services.l3_router.l3_router_plugin.L3RouterPlugin