Yang Youseok
ec875b42b6
Currently, most implementations override the L3NatAgent class itself for their own logic since there is no proper interface to extend RouterInfo class. This adds unnecessary complexity for developers who just want to extend router mechanism instead of whole RPC. Add a RouterFactory class that developer can registers RouterInfo class and delegate it for RouterInfo creation. Seperate functions and variables which currently used externally to abstract class from RouterInfo, so that extension can use the basic interface. Provide the router registration function to the l3 extension API so that extension can extend RouterInfo itself which correspond to each features (ha, distribtued, ha + distributed) Depends-On: https://review.openstack.org/#/c/620348/ Closes-Bug: #1804634 Partially-Implements: blueprint openflow-based-dvr Change-Id: I1eff726900a8e67596814ca9a5f392938f154d7b
78 lines
2.9 KiB
Python
78 lines
2.9 KiB
Python
# Copyright 2016 Comcast
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from neutron.agent.linux import ip_lib
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class L3AgentExtensionAPI(object):
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'''Implements the Agent API for the L3 agent.
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Extensions can gain access to this API by overriding the consume_api
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method which has been added to the AgentCoreResourceExtension class.
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The purpose of this API is to give L3 agent extensions access to the
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agent's RouterInfo object.
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'''
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def __init__(self, router_info, router_factory):
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self._router_info = router_info
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self._router_factory = router_factory
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def _local_namespaces(self):
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local_ns_list = ip_lib.list_network_namespaces()
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return set(local_ns_list)
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def get_router_hosting_port(self, port_id):
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"""Given a port_id, look up the router associated with that port in
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local namespace. Returns a RouterInfo object (or None if the router
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is not found).
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"""
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if port_id:
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local_namespaces = self._local_namespaces()
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for router_info in self._router_info.values():
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if router_info.ns_name in local_namespaces:
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for port in router_info.internal_ports:
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if port['id'] == port_id:
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return router_info
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def get_routers_in_project(self, project_id):
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"""Given a project_id, return a list of routers that are all in
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the given project. Returns empty list if the project_id provided
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doesn't evaluate to True.
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"""
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if project_id:
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return [ri for ri in self._router_info.values()
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if ri.router['project_id'] == project_id]
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else:
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return []
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def is_router_in_namespace(self, router_id):
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"""Given a router_id, make sure that the router is in a local
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namespace.
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"""
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local_namespaces = self._local_namespaces()
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ri = self._router_info.get(router_id)
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return ri and ri.ns_name in local_namespaces
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def get_router_info(self, router_id):
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"""Return RouterInfo for the given router id."""
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return self._router_info.get(router_id)
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def register_router(self, features, router_cls):
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"""Register router class with the given features. This is for the
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plugin to ovrride with their own ``router_info`` class.
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"""
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self._router_factory.register(features, router_cls)
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