neutron

History

Boden R 537bfb9a1c use callback payloads for PRECOMMIT_UPDATE events This patch switches callbacks over to the payload object style events [1] for PRECOMMIT_UPDATE based notifications. To do so a DBEventPayload object is used with the publish() method to pass along the related data. In addition a few UTs are updated to work with the changes. Finally a few shims are put into place to allow PRECOMMIT_UPDATE based events to use payloads while still supporting the existing kwarg style events. NeutronLibImpact [1] https://docs.openstack.org/neutron-lib/latest/contributor/callbacks.html#event-payloads Change-Id: Ie6d27df01cd7b87894efc80946d41eb1ebe25bef		2018-03-13 11:38:19 -06:00
..
service_providers	use callback payloads for PRECOMMIT_UPDATE events	2018-03-13 11:38:19 -06:00
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	use l3 api def from neutron-lib	2017-12-15 07:03:14 -07:00

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