neutron/tests/unit/agent/l3/test_namespace_manager.py

   1 # Copyright (c) 2015 Rackspace
   2 # All Rights Reserved.
   3 #
   4 #    Licensed under the Apache License, Version 2.0 (the "License"); you may
   5 #    not use this file except in compliance with the License. You may obtain
   6 #    a copy of the License at
   7 #
   8 #         http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 #    Unless required by applicable law or agreed to in writing, software
  11 #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  12 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  13 #    License for the specific language governing permissions and limitations
  14 #    under the License.
  15
  16 import mock
  17 from oslo_utils import uuidutils
  18
  19 from neutron.agent.l3 import dvr_fip_ns
  20 from neutron.agent.l3 import dvr_snat_ns
  21 from neutron.agent.l3 import namespace_manager
  22 from neutron.agent.l3 import namespaces
  23 from neutron.agent.linux import ip_lib
  24 from neutron.tests import base
  25
  26 _uuid = uuidutils.generate_uuid
  27
  28
  29 class NamespaceManagerTestCaseFramework(base.BaseTestCase):
  30
  31     def _create_namespace_manager(self):
  32         self.agent_conf = mock.Mock()
  33         self.driver = mock.Mock()
  34         return namespace_manager.NamespaceManager(self.agent_conf, self.driver)
  35
  36
  37 class TestNamespaceManager(NamespaceManagerTestCaseFramework):
  38
  39     def setUp(self):
  40         super(TestNamespaceManager, self).setUp()
  41         self.ns_manager = self._create_namespace_manager()
  42
  43     def test_get_prefix_and_id(self):
  44         router_id = _uuid()
  45
  46         ns_prefix, ns_id = self.ns_manager.get_prefix_and_id(
  47             namespaces.NS_PREFIX + router_id)
  48         self.assertEqual(namespaces.NS_PREFIX, ns_prefix)
  49         self.assertEqual(router_id, ns_id)
  50
  51         ns_prefix, ns_id = self.ns_manager.get_prefix_and_id(
  52             dvr_snat_ns.SNAT_NS_PREFIX + router_id)
  53         self.assertEqual(dvr_snat_ns.SNAT_NS_PREFIX, ns_prefix)
  54         self.assertEqual(router_id, ns_id)
  55
  56         ns_name = 'dhcp-' + router_id
  57         self.assertIsNone(self.ns_manager.get_prefix_and_id(ns_name))
  58
  59     def test_is_managed(self):
  60         router_id = _uuid()
  61
  62         router_ns_name = namespaces.NS_PREFIX + router_id
  63         self.assertTrue(self.ns_manager.is_managed(router_ns_name))
  64         router_ns_name = dvr_snat_ns.SNAT_NS_PREFIX + router_id
  65         self.assertTrue(self.ns_manager.is_managed(router_ns_name))
  66
  67         ext_net_id = _uuid()
  68         router_ns_name = dvr_fip_ns.FIP_NS_PREFIX + ext_net_id
  69         self.assertTrue(self.ns_manager.is_managed(router_ns_name))
  70
  71         self.assertFalse(self.ns_manager.is_managed('dhcp-' + router_id))
  72
  73     def test_list_all(self):
  74         ns_names = [namespaces.NS_PREFIX + _uuid(),
  75                     dvr_snat_ns.SNAT_NS_PREFIX + _uuid(),
  76                     dvr_fip_ns.FIP_NS_PREFIX + _uuid(),
  77                     'dhcp-' + _uuid(), ]
  78
  79         # Test the normal path
  80         with mock.patch.object(ip_lib.IPWrapper, 'get_namespaces',
  81                                return_value=ns_names):
  82             retrieved_ns_names = self.ns_manager.list_all()
  83         self.assertEqual(len(ns_names) - 1, len(retrieved_ns_names))
  84         for i in range(len(retrieved_ns_names)):
  85             self.assertIn(ns_names[i], retrieved_ns_names)
  86         self.assertNotIn(ns_names[-1], retrieved_ns_names)
  87
  88         # Test path where IPWrapper raises exception
  89         with mock.patch.object(ip_lib.IPWrapper, 'get_namespaces',
  90                                side_effect=RuntimeError):
  91             retrieved_ns_names = self.ns_manager.list_all()
  92         self.assertFalse(retrieved_ns_names)
  93
  94     def test_ensure_router_cleanup(self):
  95         router_id = _uuid()
  96         ns_names = [namespaces.NS_PREFIX + _uuid() for _ in range(5)]
  97         ns_names += [dvr_snat_ns.SNAT_NS_PREFIX + _uuid() for _ in range(5)]
  98         ns_names += [namespaces.NS_PREFIX + router_id,
  99                      dvr_snat_ns.SNAT_NS_PREFIX + router_id]
 100         with mock.patch.object(ip_lib.IPWrapper, 'get_namespaces',
 101                                return_value=ns_names), \
 102                 mock.patch.object(self.ns_manager, '_cleanup') as mock_cleanup:
 103             self.ns_manager.ensure_router_cleanup(router_id)
 104             expected = [mock.call(namespaces.NS_PREFIX, router_id),
 105                         mock.call(dvr_snat_ns.SNAT_NS_PREFIX, router_id)]
 106             mock_cleanup.assert_has_calls(expected, any_order=True)
 107             self.assertEqual(2, mock_cleanup.call_count)