371 lines
18 KiB
Python
371 lines
18 KiB
Python
# Copyright 2016 Hewlett Packard Enterprise Development Company LP
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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 netaddr import IPAddress
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from neutron_lib import constants as n_const
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_utils import importutils
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from neutron.callbacks import events
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from neutron.callbacks import registry
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from neutron.callbacks import resources
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from neutron.common import rpc as n_rpc
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from neutron import context
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from neutron.services import service_base
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from neutron_dynamic_routing.api.rpc.agentnotifiers import bgp_dr_rpc_agent_api # noqa
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from neutron_dynamic_routing.api.rpc.handlers import bgp_speaker_rpc as bs_rpc
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from neutron_dynamic_routing.db import bgp_db
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from neutron_dynamic_routing.db import bgp_dragentscheduler_db
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from neutron_dynamic_routing.extensions import bgp as bgp_ext
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from neutron_dynamic_routing.extensions import bgp_dragentscheduler as dras_ext
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from neutron_dynamic_routing.services.bgp.common import constants as bgp_consts
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PLUGIN_NAME = bgp_ext.BGP_EXT_ALIAS + '_svc_plugin'
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LOG = logging.getLogger(__name__)
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class BgpPlugin(service_base.ServicePluginBase,
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bgp_db.BgpDbMixin,
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bgp_dragentscheduler_db.BgpDrAgentSchedulerDbMixin):
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supported_extension_aliases = [bgp_ext.BGP_EXT_ALIAS,
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dras_ext.BGP_DRAGENT_SCHEDULER_EXT_ALIAS]
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def __init__(self):
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super(BgpPlugin, self).__init__()
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self.bgp_drscheduler = importutils.import_object(
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cfg.CONF.bgp_drscheduler_driver)
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self._setup_rpc()
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self._register_callbacks()
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def get_plugin_name(self):
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return PLUGIN_NAME
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def get_plugin_type(self):
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return bgp_ext.BGP_EXT_ALIAS
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def get_plugin_description(self):
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"""returns string description of the plugin."""
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return ("BGP dynamic routing service for announcement of next-hops "
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"for tenant networks, floating IP's, and DVR host routes.")
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def _setup_rpc(self):
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self.topic = bgp_consts.BGP_PLUGIN
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self.conn = n_rpc.create_connection()
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self.agent_notifiers[bgp_consts.AGENT_TYPE_BGP_ROUTING] = (
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bgp_dr_rpc_agent_api.BgpDrAgentNotifyApi()
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)
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self._bgp_rpc = self.agent_notifiers[bgp_consts.AGENT_TYPE_BGP_ROUTING]
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self.endpoints = [bs_rpc.BgpSpeakerRpcCallback()]
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self.conn.create_consumer(self.topic, self.endpoints,
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fanout=False)
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self.conn.consume_in_threads()
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def _register_callbacks(self):
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registry.subscribe(self.floatingip_update_callback,
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resources.FLOATING_IP,
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events.AFTER_UPDATE)
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registry.subscribe(self.router_interface_callback,
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resources.ROUTER_INTERFACE,
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events.AFTER_CREATE)
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registry.subscribe(self.router_interface_callback,
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resources.ROUTER_INTERFACE,
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events.BEFORE_CREATE)
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registry.subscribe(self.router_interface_callback,
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resources.ROUTER_INTERFACE,
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events.AFTER_DELETE)
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registry.subscribe(self.router_gateway_callback,
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resources.ROUTER_GATEWAY,
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events.AFTER_CREATE)
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registry.subscribe(self.router_gateway_callback,
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resources.ROUTER_GATEWAY,
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events.AFTER_DELETE)
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def get_bgp_speakers(self, context, filters=None, fields=None,
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sorts=None, limit=None, marker=None,
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page_reverse=False):
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return super(BgpPlugin, self).get_bgp_speakers(
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context,
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filters=filters,
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fields=fields,
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sorts=sorts,
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limit=limit,
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marker=marker,
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page_reverse=page_reverse)
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def get_bgp_speaker(self, context, bgp_speaker_id, fields=None):
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return super(BgpPlugin, self).get_bgp_speaker(context,
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bgp_speaker_id,
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fields=fields)
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def create_bgp_speaker(self, context, bgp_speaker):
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bgp_speaker = super(BgpPlugin, self).create_bgp_speaker(context,
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bgp_speaker)
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return bgp_speaker
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def update_bgp_speaker(self, context, bgp_speaker_id, bgp_speaker):
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return super(BgpPlugin, self).update_bgp_speaker(context,
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bgp_speaker_id,
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bgp_speaker)
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def delete_bgp_speaker(self, context, bgp_speaker_id):
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hosted_bgp_dragents = self.get_dragents_hosting_bgp_speakers(
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context,
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[bgp_speaker_id])
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super(BgpPlugin, self).delete_bgp_speaker(context, bgp_speaker_id)
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for agent in hosted_bgp_dragents:
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self._bgp_rpc.bgp_speaker_removed(context,
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bgp_speaker_id,
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agent.host)
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def get_bgp_peers(self, context, fields=None, filters=None, sorts=None,
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limit=None, marker=None, page_reverse=False):
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return super(BgpPlugin, self).get_bgp_peers(
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context, fields=fields,
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filters=filters, sorts=sorts,
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limit=limit, marker=marker,
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page_reverse=page_reverse)
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def get_bgp_peer(self, context, bgp_peer_id, fields=None):
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return super(BgpPlugin, self).get_bgp_peer(context,
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bgp_peer_id,
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fields=fields)
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def create_bgp_peer(self, context, bgp_peer):
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return super(BgpPlugin, self).create_bgp_peer(context, bgp_peer)
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def update_bgp_peer(self, context, bgp_peer_id, bgp_peer):
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return super(BgpPlugin, self).update_bgp_peer(context,
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bgp_peer_id,
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bgp_peer)
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def delete_bgp_peer(self, context, bgp_peer_id):
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super(BgpPlugin, self).delete_bgp_peer(context, bgp_peer_id)
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def add_bgp_peer(self, context, bgp_speaker_id, bgp_peer_info):
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ret_value = super(BgpPlugin, self).add_bgp_peer(context,
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bgp_speaker_id,
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bgp_peer_info)
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hosted_bgp_dragents = self.get_dragents_hosting_bgp_speakers(
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context,
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[bgp_speaker_id])
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for agent in hosted_bgp_dragents:
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self._bgp_rpc.bgp_peer_associated(context, bgp_speaker_id,
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ret_value['bgp_peer_id'],
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agent.host)
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return ret_value
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def remove_bgp_peer(self, context, bgp_speaker_id, bgp_peer_info):
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hosted_bgp_dragents = self.get_dragents_hosting_bgp_speakers(
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context, [bgp_speaker_id])
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ret_value = super(BgpPlugin, self).remove_bgp_peer(context,
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bgp_speaker_id,
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bgp_peer_info)
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for agent in hosted_bgp_dragents:
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self._bgp_rpc.bgp_peer_disassociated(context,
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bgp_speaker_id,
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ret_value['bgp_peer_id'],
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agent.host)
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def add_bgp_speaker_to_dragent(self, context, agent_id, speaker_id):
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super(BgpPlugin, self).add_bgp_speaker_to_dragent(context,
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agent_id,
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speaker_id)
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def remove_bgp_speaker_from_dragent(self, context, agent_id, speaker_id):
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super(BgpPlugin, self).remove_bgp_speaker_from_dragent(context,
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agent_id,
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speaker_id)
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def list_bgp_speaker_on_dragent(self, context, agent_id):
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return super(BgpPlugin, self).list_bgp_speaker_on_dragent(context,
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agent_id)
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def list_dragent_hosting_bgp_speaker(self, context, speaker_id):
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return super(BgpPlugin, self).list_dragent_hosting_bgp_speaker(
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context,
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speaker_id)
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def add_gateway_network(self, context, bgp_speaker_id, network_info):
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return super(BgpPlugin, self).add_gateway_network(context,
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bgp_speaker_id,
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network_info)
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def remove_gateway_network(self, context, bgp_speaker_id, network_info):
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return super(BgpPlugin, self).remove_gateway_network(context,
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bgp_speaker_id,
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network_info)
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def get_advertised_routes(self, context, bgp_speaker_id):
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return super(BgpPlugin, self).get_advertised_routes(context,
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bgp_speaker_id)
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def floatingip_update_callback(self, resource, event, trigger, **kwargs):
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if event != events.AFTER_UPDATE:
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return
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ctx = context.get_admin_context()
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new_router_id = kwargs['router_id']
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last_router_id = kwargs['last_known_router_id']
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next_hop = kwargs['next_hop']
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dest = kwargs['floating_ip_address'] + '/32'
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bgp_speakers = self._bgp_speakers_for_gw_network_by_family(
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ctx,
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kwargs['floating_network_id'],
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n_const.IP_VERSION_4)
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if last_router_id and new_router_id != last_router_id:
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for bgp_speaker in bgp_speakers:
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self.stop_route_advertisements(ctx, self._bgp_rpc,
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bgp_speaker.id, [dest])
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if next_hop and new_router_id != last_router_id:
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new_host_route = {'destination': dest, 'next_hop': next_hop}
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for bgp_speaker in bgp_speakers:
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self.start_route_advertisements(ctx, self._bgp_rpc,
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bgp_speaker.id,
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[new_host_route])
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def router_interface_callback(self, resource, event, trigger, **kwargs):
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if event == events.AFTER_CREATE:
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self._handle_router_interface_after_create(**kwargs)
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if event == events.AFTER_DELETE:
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gw_network = kwargs['network_id']
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next_hops = self._next_hops_from_gateway_ips(
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kwargs['gateway_ips'])
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ctx = context.get_admin_context()
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speakers = self._bgp_speakers_for_gateway_network(ctx, gw_network)
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for speaker in speakers:
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routes = self._route_list_from_prefixes_and_next_hop(
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kwargs['cidrs'],
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next_hops[speaker.ip_version])
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self._handle_router_interface_after_delete(gw_network, routes)
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def _handle_router_interface_after_create(self, **kwargs):
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gw_network = kwargs['network_id']
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if not gw_network:
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return
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ctx = context.get_admin_context()
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with ctx.session.begin(subtransactions=True):
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speakers = self._bgp_speakers_for_gateway_network(ctx,
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gw_network)
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next_hops = self._next_hops_from_gateway_ips(
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kwargs['gateway_ips'])
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for speaker in speakers:
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prefixes = self._tenant_prefixes_by_router(
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ctx,
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kwargs['router_id'],
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speaker.id)
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next_hop = next_hops.get(speaker.ip_version)
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if next_hop:
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rl = self._route_list_from_prefixes_and_next_hop(prefixes,
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next_hop)
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self.start_route_advertisements(ctx,
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self._bgp_rpc,
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speaker.id,
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rl)
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def router_gateway_callback(self, resource, event, trigger, **kwargs):
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if event == events.AFTER_CREATE:
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self._handle_router_gateway_after_create(**kwargs)
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if event == events.AFTER_DELETE:
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gw_network = kwargs['network_id']
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router_id = kwargs['router_id']
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next_hops = self._next_hops_from_gateway_ips(
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kwargs['gateway_ips'])
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ctx = context.get_admin_context()
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speakers = self._bgp_speakers_for_gateway_network(ctx, gw_network)
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for speaker in speakers:
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if speaker.ip_version in next_hops:
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next_hop = next_hops[speaker.ip_version]
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prefixes = self._tenant_prefixes_by_router(ctx,
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router_id,
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speaker.id)
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routes = self._route_list_from_prefixes_and_next_hop(
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prefixes,
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next_hop)
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self._handle_router_interface_after_delete(gw_network, routes)
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def _handle_router_gateway_after_create(self, **kwargs):
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ctx = context.get_admin_context()
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gw_network = kwargs['network_id']
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router_id = kwargs['router_id']
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with ctx.session.begin(subtransactions=True):
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speakers = self._bgp_speakers_for_gateway_network(ctx,
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gw_network)
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next_hops = self._next_hops_from_gateway_ips(kwargs['gw_ips'])
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for speaker in speakers:
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if speaker.ip_version in next_hops:
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next_hop = next_hops[speaker.ip_version]
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prefixes = self._tenant_prefixes_by_router(ctx,
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router_id,
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speaker.id)
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routes = self._route_list_from_prefixes_and_next_hop(
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prefixes,
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next_hop)
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self.start_route_advertisements(ctx, self._bgp_rpc,
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speaker.id, routes)
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def _handle_router_interface_after_delete(self, gw_network, routes):
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if gw_network and routes:
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ctx = context.get_admin_context()
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speakers = self._bgp_speakers_for_gateway_network(ctx, gw_network)
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for speaker in speakers:
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self.stop_route_advertisements(ctx, self._bgp_rpc,
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speaker.id, routes)
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def _next_hops_from_gateway_ips(self, gw_ips):
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if gw_ips:
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return {IPAddress(ip).version: ip for ip in gw_ips}
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return {}
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def start_route_advertisements(self, ctx, bgp_rpc,
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bgp_speaker_id, routes):
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agents = self.list_dragent_hosting_bgp_speaker(ctx, bgp_speaker_id)
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for agent in agents['agents']:
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bgp_rpc.bgp_routes_advertisement(ctx,
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bgp_speaker_id,
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routes,
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agent['host'])
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msg = "Starting route advertisements for %s on BgpSpeaker %s"
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self._debug_log_for_routes(msg, routes, bgp_speaker_id)
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def stop_route_advertisements(self, ctx, bgp_rpc,
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bgp_speaker_id, routes):
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agents = self.list_dragent_hosting_bgp_speaker(ctx, bgp_speaker_id)
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for agent in agents['agents']:
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bgp_rpc.bgp_routes_withdrawal(ctx,
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bgp_speaker_id,
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routes,
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agent['host'])
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msg = "Stopping route advertisements for %s on BgpSpeaker %s"
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self._debug_log_for_routes(msg, routes, bgp_speaker_id)
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def _debug_log_for_routes(self, msg, routes, bgp_speaker_id):
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# Could have a large number of routes passed, check log level first
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if LOG.isEnabledFor(logging.DEBUG):
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for route in routes:
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LOG.debug(msg, route, bgp_speaker_id)
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