neutron

History

Boden R 957eca96f4 delete common_db_mixin The functionality within neutron.db.common_db_mixin is available via neutron-lib APIs. This patch removes common_db_mixin and updates any uses of it to use neutron-lib instead. Depends-On: https://review.openstack.org/#/c/636159/ NeutronLibImpact Change-Id: I2388f90b37abb09408809dda8c21da551bcd94bb		2019-04-17 11:25:41 -06:00
..
service_providers	Merge "Select service_provider on the basis of service_module"	2018-11-15 12:47:09 +00:00
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	delete common_db_mixin	2019-04-17 11:25:41 -06:00

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