neutron-vpnaas/neutron_vpnaas/services/vpn/agent.py

124 lines
4.6 KiB
Python

# Copyright 2013, Nachi Ueno, NTT I3, Inc.
# Copyright 2017, Fujitsu Limited
# 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.
import typing as ty
from neutron.agent.l3 import l3_agent_extension_api
from neutron_lib.agent import l3_extension
from neutron_lib import context
from oslo_config import cfg
from oslo_log import log as logging
from neutron_vpnaas._i18n import _
from neutron_vpnaas.services.vpn import device_drivers
from neutron_vpnaas.services.vpn import vpn_service
LOG = logging.getLogger(__name__)
vpn_agent_opts = [
cfg.MultiStrOpt(
'vpn_device_driver',
default=['neutron_vpnaas.services.vpn.device_drivers.'
'ipsec.OpenSwanDriver'],
sample_default=['neutron_vpnaas.services.vpn.device_drivers.ipsec.'
'OpenSwanDriver, '
'neutron_vpnaas.services.vpn.device_drivers.'
'strongswan_ipsec.StrongSwanDriver, '
'neutron_vpnaas.services.vpn.device_drivers.'
'libreswan_ipsec.LibreSwanDriver'],
help=_("The vpn device drivers Neutron will use")),
]
cfg.CONF.register_opts(vpn_agent_opts, 'vpnagent')
class VPNAgent(l3_extension.L3AgentExtension):
"""VPNaaS Agent support to be used by Neutron L3 agent."""
def initialize(self, connection, driver_type: device_drivers.DeviceDriver):
LOG.debug("Loading VPNaaS")
def consume_api(self,
agent_api: l3_agent_extension_api.L3AgentExtensionAPI):
LOG.debug("Loading consume_api for VPNaaS")
self.agent_api = agent_api
def __init__(self, host, conf):
LOG.debug("Initializing VPNaaS agent")
self.agent_api = None
self.conf = conf
self.host = host
self.service = vpn_service.VPNService(self)
self.device_drivers = self.service.load_device_drivers(self.host)
def add_router(self, context: context.Context, data):
"""Handles router add event"""
ri = self.agent_api.get_router_info(data['id'])
if ri is not None:
for device_driver in self.device_drivers:
device_driver.create_router(ri)
device_driver.sync(context, [ri])
else:
LOG.debug("Router %s was concurrently deleted while "
"creating VPN for it", data['id'])
def update_router(self, context: context.Context, data):
"""Handles router update event"""
ri = self.agent_api.get_router_info(data['id'])
if ri is not None:
for device_driver in self.device_drivers:
device_driver.sync(context, [ri])
else:
LOG.debug("Router %s was concurrently deleted while "
"updating VPN for it", data['id'])
def delete_router(self, context: context.Context, data):
"""Handles router delete event"""
for device_driver in self.device_drivers:
device_driver.destroy_router(data['id'])
def ha_state_change(self, context: context.Context,
data: ty.Dict[str, str]):
"""Enable the vpn process when router transitioned to master.
And disable vpn process for backup router.
"""
router_id = data['router_id']
state = data['state']
for device_driver in self.device_drivers:
if router_id in device_driver.processes:
# NOTE(mnaser): We need to update the router object so it has
# the new HA state so we can do status updates.
device_driver.routers[router_id].ha_state = state
process = device_driver.processes[router_id]
if state in ('master', 'primary'):
process.enable()
else:
process.disable()
def update_network(self, context: context.Context, data):
pass
class L3WithVPNaaS(VPNAgent):
def __init__(self, conf=None):
if conf:
self.conf = conf
else:
self.conf = cfg.CONF
super().__init__(host=self.conf.host, conf=self.conf)