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OpenStack Study: l3_router_plugin.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # Copyright (c) 2013 OpenStack Foundation. # All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. # # @author: Bob Melander, Cisco Systems, Inc. from oslo.config import cfg from neutron.api.rpc.agentnotifiers import l3_rpc_agent_api from neutron.common import constants as q_const from neutron.common import rpc as q_rpc from neutron.common import topics from neutron.db import api as qdbapi from neutron.db import db_base_plugin_v2 from neutron.db import extraroute_db from neutron.db import l3_agentschedulers_db from neutron.db import l3_gwmode_db from neutron.db import l3_rpc_base from neutron.db import model_base from neutron.openstack.common import importutils from neutron.openstack.common import rpc from neutron.plugins.common import constants
**** CubicPower OpenStack Study **** class L3RouterPluginRpcCallbacks(l3_rpc_base.L3RpcCallbackMixin): RPC_API_VERSION = '1.1'
**** CubicPower OpenStack Study **** def create_rpc_dispatcher(self): """Get the rpc dispatcher for this manager. If a manager would like to set an rpc API version, or support more than one class as the target of rpc messages, override this method. """ return q_rpc.PluginRpcDispatcher([self])
**** CubicPower OpenStack Study **** class L3RouterPlugin(db_base_plugin_v2.CommonDbMixin,
extraroute_db.ExtraRoute_db_mixin,
l3_gwmode_db.L3_NAT_db_mixin,
l3_agentschedulers_db.L3AgentSchedulerDbMixin): """Implementation of the Neutron L3 Router Service Plugin. This class implements a L3 service plugin that provides router and floatingip resources and manages associated request/response. All DB related work is implemented in classes l3_db.L3_NAT_db_mixin and extraroute_db.ExtraRoute_db_mixin. """ supported_extension_aliases = ["router", "ext-gw-mode", "extraroute", "l3_agent_scheduler"]
**** CubicPower OpenStack Study **** def __init__(self): qdbapi.register_models(base=model_base.BASEV2) self.setup_rpc() self.router_scheduler = importutils.import_object( cfg.CONF.router_scheduler_driver)
**** CubicPower OpenStack Study **** def setup_rpc(self): # RPC support self.topic = topics.L3PLUGIN self.conn = rpc.create_connection(new=True) self.agent_notifiers.update( {q_const.AGENT_TYPE_L3: l3_rpc_agent_api.L3AgentNotify}) self.callbacks = L3RouterPluginRpcCallbacks() self.dispatcher = self.callbacks.create_rpc_dispatcher() self.conn.create_consumer(self.topic, self.dispatcher, fanout=False) self.conn.consume_in_thread()
**** CubicPower OpenStack Study **** def get_plugin_type(self): return constants.L3_ROUTER_NAT
**** CubicPower OpenStack Study **** def get_plugin_description(self): """returns string description of the plugin.""" return ("L3 Router Service Plugin for basic L3 forwarding" " between (L2) Neutron networks and access to external" " networks via a NAT gateway.")
**** CubicPower OpenStack Study **** def create_floatingip(self, context, floatingip): """Create floating IP. :param context: Neutron request context :param floatingip: data fo the floating IP being created :returns: A floating IP object on success AS the l3 router plugin aysnchrounously creates floating IPs leveraging tehe l3 agent, the initial status fro the floating IP object will be DOWN. """ return super(L3RouterPlugin, self).create_floatingip( context, floatingip, initial_status=q_const.FLOATINGIP_STATUS_DOWN)
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