RETIRED, Tricircle is to provide networking automation across Neutron.
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tricircle/tricircle/network/local_l3_plugin.py

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# Copyright 2015 Huawei Technologies Co., Ltd.
# 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.
from sqlalchemy import orm
from neutron_lib import constants
from neutron_lib.exceptions import l3 as l3_exc
from neutron.db.models import l3 as l3_models
from neutron.db import models_v2
from neutron.services.l3_router import l3_router_plugin
class TricircleL3Plugin(l3_router_plugin.L3RouterPlugin):
# Override the original implementation to allow associating a floating ip
# to a port whose network is not attached to the router. Tricircle will
# configures extra routes to guarantee packets can reach the port.
def get_router_for_floatingip(self, context, internal_port,
internal_subnet, external_network_id):
"""Find a router to handle the floating-ip association.
:param internal_port: The port for the fixed-ip.
:param internal_subnet: The subnet for the fixed-ip.
:param external_network_id: The external network for floating-ip.
:raises: ExternalGatewayForFloatingIPNotFound if no suitable router
is found.
"""
router_port = l3_models.RouterPort
gw_port = orm.aliased(models_v2.Port, name="gw_port")
router_port_qry = context.session.query(
router_port.router_id
).join(gw_port, gw_port.device_id == router_port.router_id).filter(
gw_port.network_id == external_network_id,
gw_port.device_owner == constants.DEVICE_OWNER_ROUTER_GW
).distinct()
first_router_id = None
for router in router_port_qry:
if not first_router_id:
first_router_id = router.router_id
if first_router_id:
return first_router_id
raise l3_exc.ExternalGatewayForFloatingIPNotFound(
subnet_id=internal_subnet['id'],
external_network_id=external_network_id,
port_id=internal_port['id'])