108 lines
4.6 KiB
Python
108 lines
4.6 KiB
Python
# Copyright 2016 Huawei Technologies India Pvt. Ltd.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import oslo_messaging
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from neutron.common import rpc as n_rpc
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from neutron_dynamic_routing.services.bgp.common import constants as bgp_consts
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class BgpDrAgentNotifyApi(object):
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"""API for plugin to notify BGP DrAgent.
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This class implements the client side of an rpc interface. The server side
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is neutron_dynamic_routing.services.bgp.agent.bgp_dragent.BgpDrAgent. For
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more information about rpc interfaces, please see
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http://docs.openstack.org/developer/neutron/devref/rpc_api.html.
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"""
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def __init__(self, topic=bgp_consts.BGP_DRAGENT):
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target = oslo_messaging.Target(topic=topic, version='1.0')
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self.client = n_rpc.get_client(target)
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self.topic = topic
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def bgp_routes_advertisement(self, context, bgp_speaker_id,
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routes, host):
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"""Tell BgpDrAgent to begin advertising the given route.
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Invoked on FIP association, adding router port to a tenant network,
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and new DVR port-host bindings, and subnet creation(?).
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"""
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self._notification_host_cast(context, 'bgp_routes_advertisement_end',
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{'advertise_routes': {'speaker_id': bgp_speaker_id,
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'routes': routes}}, host)
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def bgp_routes_withdrawal(self, context, bgp_speaker_id,
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routes, host):
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"""Tell BgpDrAgent to stop advertising the given route.
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Invoked on FIP disassociation, removal of a router port on a
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network, and removal of DVR port-host binding, and subnet delete(?).
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"""
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self._notification_host_cast(context, 'bgp_routes_withdrawal_end',
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{'withdraw_routes': {'speaker_id': bgp_speaker_id,
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'routes': routes}}, host)
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def bgp_peer_disassociated(self, context, bgp_speaker_id,
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bgp_peer_ip, host):
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"""Tell BgpDrAgent about a new BGP Peer association.
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This effectively tells the BgpDrAgent to stop a peering session.
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"""
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self._notification_host_cast(context, 'bgp_peer_disassociation_end',
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{'bgp_peer': {'speaker_id': bgp_speaker_id,
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'peer_ip': bgp_peer_ip}}, host)
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def bgp_peer_associated(self, context, bgp_speaker_id,
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bgp_peer_id, host):
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"""Tell BgpDrAgent about a BGP Peer disassociation.
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This effectively tells the bgp_dragent to open a peering session.
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"""
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self._notification_host_cast(context, 'bgp_peer_association_end',
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{'bgp_peer': {'speaker_id': bgp_speaker_id,
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'peer_id': bgp_peer_id}}, host)
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def bgp_speaker_created(self, context, bgp_speaker_id, host):
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"""Tell BgpDrAgent about the creation of a BGP Speaker.
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Because a BGP Speaker can be created with BgpPeer binding in place,
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we need to inform the BgpDrAgent of a new BGP Speaker in case a
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peering session needs to opened immediately.
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"""
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self._notification_host_cast(context, 'bgp_speaker_create_end',
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{'bgp_speaker': {'id': bgp_speaker_id}}, host)
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def bgp_speaker_removed(self, context, bgp_speaker_id, host):
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"""Tell BgpDrAgent about the removal of a BGP Speaker.
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Because a BGP Speaker can be removed with BGP Peer binding in
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place, we need to inform the BgpDrAgent of the removal of a
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BGP Speaker in case peering sessions need to be stopped.
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"""
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self._notification_host_cast(context, 'bgp_speaker_remove_end',
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{'bgp_speaker': {'id': bgp_speaker_id}}, host)
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def _notification_host_cast(self, context, method, payload, host):
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"""Send payload to BgpDrAgent in the cast mode"""
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cctxt = self.client.prepare(topic=self.topic, server=host)
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cctxt.cast(context, method, payload=payload)
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def _notification_host_call(self, context, method, payload, host):
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"""Send payload to BgpDrAgent in the call mode"""
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cctxt = self.client.prepare(topic=self.topic, server=host)
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cctxt.call(context, method, payload=payload)
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