vmware-nsx/neutron/tests/unit/test_db_rpc_base.py
armando-migliaccio ffa11a6470 Avoid dhcp agent race condition on subnet and network delete
This patch ensures that, when the dhcp agent queries the server
to retrieve and delete its DHCP port, it does so by selecting
for update. This has been done by introducing a new method
that combines the get and delete in one shot.

Closes-Bug:1197627

Change-Id: I1e8a87d7dc1a1cb9309aeefd41619e20f49f95a6
2013-10-26 17:36:05 +00:00

151 lines
6.2 KiB
Python

# Copyright (c) 2012 OpenStack Foundation.
#
# 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 mock
from neutron.db import dhcp_rpc_base
from neutron.tests import base
class TestDhcpRpcCallackMixin(base.BaseTestCase):
def setUp(self):
super(TestDhcpRpcCallackMixin, self).setUp()
self.plugin_p = mock.patch('neutron.manager.NeutronManager.get_plugin')
get_plugin = self.plugin_p.start()
self.plugin = mock.MagicMock()
get_plugin.return_value = self.plugin
self.callbacks = dhcp_rpc_base.DhcpRpcCallbackMixin()
self.log_p = mock.patch('neutron.db.dhcp_rpc_base.LOG')
self.log = self.log_p.start()
def tearDown(self):
self.log_p.stop()
self.plugin_p.stop()
super(TestDhcpRpcCallackMixin, self).tearDown()
def test_get_active_networks(self):
plugin_retval = [dict(id='a'), dict(id='b')]
self.plugin.get_networks.return_value = plugin_retval
networks = self.callbacks.get_active_networks(mock.Mock(), host='host')
self.assertEqual(networks, ['a', 'b'])
self.plugin.assert_has_calls(
[mock.call.get_networks(mock.ANY,
filters=dict(admin_state_up=[True]))])
self.assertEqual(len(self.log.mock_calls), 1)
def test_get_network_info(self):
network_retval = dict(id='a')
subnet_retval = mock.Mock()
port_retval = mock.Mock()
self.plugin.get_network.return_value = network_retval
self.plugin.get_subnets.return_value = subnet_retval
self.plugin.get_ports.return_value = port_retval
retval = self.callbacks.get_network_info(mock.Mock(), network_id='a')
self.assertEqual(retval, network_retval)
self.assertEqual(retval['subnets'], subnet_retval)
self.assertEqual(retval['ports'], port_retval)
def _test_get_dhcp_port_helper(self, port_retval, other_expectations=[],
update_port=None, create_port=None):
subnets_retval = [dict(id='a', enable_dhcp=True),
dict(id='b', enable_dhcp=False)]
self.plugin.get_subnets.return_value = subnets_retval
if port_retval:
self.plugin.get_ports.return_value = [port_retval]
else:
self.plugin.get_ports.return_value = []
self.plugin.update_port.return_value = update_port
self.plugin.create_port.return_value = create_port
retval = self.callbacks.get_dhcp_port(mock.Mock(),
network_id='netid',
device_id='devid',
host='host')
expected = [mock.call.get_subnets(mock.ANY,
filters=dict(network_id=['netid'])),
mock.call.get_ports(mock.ANY,
filters=dict(network_id=['netid'],
device_id=['devid']))]
expected.extend(other_expectations)
self.plugin.assert_has_calls(expected)
return retval
def test_get_dhcp_port_existing(self):
port_retval = dict(id='port_id', fixed_ips=[dict(subnet_id='a')])
expectations = [
mock.call.update_port(mock.ANY, 'port_id', dict(port=port_retval))]
self._test_get_dhcp_port_helper(port_retval, expectations,
update_port=port_retval)
self.assertEqual(len(self.log.mock_calls), 1)
def test_get_dhcp_port_create_new(self):
self.plugin.get_network.return_value = dict(tenant_id='tenantid')
create_spec = dict(tenant_id='tenantid', device_id='devid',
network_id='netid', name='',
admin_state_up=True,
device_owner='network:dhcp',
mac_address=mock.ANY)
create_retval = create_spec.copy()
create_retval['id'] = 'port_id'
create_retval['fixed_ips'] = [dict(subnet_id='a', enable_dhcp=True)]
create_spec['fixed_ips'] = [dict(subnet_id='a')]
expectations = [
mock.call.get_network(mock.ANY, 'netid'),
mock.call.create_port(mock.ANY, dict(port=create_spec))]
retval = self._test_get_dhcp_port_helper(None, expectations,
create_port=create_retval)
self.assertEqual(create_retval, retval)
self.assertEqual(len(self.log.mock_calls), 2)
def test_release_dhcp_port(self):
port_retval = dict(id='port_id', fixed_ips=[dict(subnet_id='a')])
self.plugin.get_ports.return_value = [port_retval]
self.callbacks.release_dhcp_port(mock.ANY, network_id='netid',
device_id='devid')
self.plugin.assert_has_calls([
mock.call.delete_ports(mock.ANY,
filters=dict(network_id=['netid'],
device_id=['devid']))])
def test_release_port_fixed_ip(self):
port_retval = dict(id='port_id', fixed_ips=[dict(subnet_id='a')])
port_update = dict(id='port_id', fixed_ips=[])
self.plugin.get_ports.return_value = [port_retval]
self.callbacks.release_port_fixed_ip(mock.ANY, network_id='netid',
device_id='devid', subnet_id='a')
self.plugin.assert_has_calls([
mock.call.get_ports(mock.ANY, filters=dict(network_id=['netid'],
device_id=['devid'])),
mock.call.update_port(mock.ANY, 'port_id',
dict(port=port_update))])