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#!/usr/bin/env python
# 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
# 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 sys
import types
from unittest import mock
from neutron_lib import constants
from oslo_config import cfg
from neutron.agent.l3 import agent
from neutron.agent.l3 import namespaces
from neutron.agent import l3_agent
class L3NATAgentForTest(agent.L3NATAgentWithStateReport):
def __init__(self, host, conf=None):
ns_suffix = '@%s' % cfg.CONF.test_namespace_suffix
# Mock out building of namespace names
orig_build_ns_name = namespaces.build_ns_name
def build_ns_name(prefix, identifier):
return "%s%s" % (orig_build_ns_name(prefix, identifier), ns_suffix)
build_ns = mock.patch.object(namespaces, 'build_ns_name').start()
build_ns.side_effect = build_ns_name
# Mock the parsing prefix from namespace names
orig_get_prefix = namespaces.get_prefix_from_ns_name
def get_prefix_from_ns_name(ns_name):
if ns_name.endswith(ns_suffix):
return orig_get_prefix(ns_name[:-len(ns_suffix)])
parse_prefix = mock.patch.object(namespaces,
parse_prefix.side_effect = get_prefix_from_ns_name
# Mock the parsing id from namespace names
orig_get_id = namespaces.get_id_from_ns_name
def get_id_from_ns_name(ns_name):
if ns_name.endswith(ns_suffix):
return orig_get_id(ns_name[:-len(ns_suffix)])
parse_id = mock.patch.object(namespaces, 'get_id_from_ns_name').start()
parse_id.side_effect = get_id_from_ns_name
super(L3NATAgentForTest, self).__init__(host, conf)
def _create_router(self, router_id, router):
"""Create a router with suffix added to the router namespace name.
This is needed to be able to run two agents serving the same router
on the same node.
router = (
super(L3NATAgentForTest, self)._create_router(router_id, router))
router.get_internal_device_name = types.MethodType(
get_internal_device_name, router)
router.get_external_device_name = types.MethodType(
get_external_device_name, router)
return router
def _append_suffix(dev_name):
# If dev_name = 'xyz123' and the suffix is 'hostB' then the result
# will be 'xy_stB'
return '%s_%s' % (dev_name[:-4], cfg.CONF.test_namespace_suffix[-3:])
def get_internal_device_name(ri, port_id):
return _append_suffix(
(namespaces.INTERNAL_DEV_PREFIX + port_id)
def get_external_device_name(ri, port_id):
return _append_suffix(
(namespaces.EXTERNAL_DEV_PREFIX + port_id)
OPTS = [
cfg.StrOpt('test_namespace_suffix', default='testprefix',
help="Suffix to append to all namespace names."),
def register_opts(conf):
def main(manager='neutron.tests.common.agents.l3_agent.L3NATAgentForTest'):
if __name__ == "__main__":