OpenStack Networking (Neutron)
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neutron/neutron/agent/l3/dvr_snat_ns.py

46 lines
1.7 KiB

# 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 oslo_log import log as logging
from neutron.agent.l3 import namespaces
from neutron.agent.linux import ip_lib
from neutron.common import constants
LOG = logging.getLogger(__name__)
SNAT_NS_PREFIX = 'snat-'
SNAT_INT_DEV_PREFIX = constants.SNAT_INT_DEV_PREFIX
class SnatNamespace(namespaces.Namespace):
def __init__(self, router_id, agent_conf, driver, use_ipv6):
self.router_id = router_id
name = self.get_snat_ns_name(router_id)
super(SnatNamespace, self).__init__(
name, agent_conf, driver, use_ipv6)
@classmethod
def get_snat_ns_name(cls, router_id):
return namespaces.build_ns_name(SNAT_NS_PREFIX, router_id)
def delete(self):
ns_ip = ip_lib.IPWrapper(namespace=self.name)
for d in ns_ip.get_devices(exclude_loopback=True):
if d.name.startswith(SNAT_INT_DEV_PREFIX):
LOG.debug('Unplugging DVR device %s', d.name)
self.driver.unplug(d.name, namespace=self.name,
prefix=SNAT_INT_DEV_PREFIX)
# TODO(mrsmith): delete ext-gw-port
LOG.debug('DVR: destroy snat ns: %s', self.name)
super(SnatNamespace, self).delete()