197 lines
7.6 KiB
Python
197 lines
7.6 KiB
Python
# Copyright (c) 2013 OpenStack Foundation.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import datetime
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import mock
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from oslo_db import exception as exc
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from oslo_utils import timeutils
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import testscenarios
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from neutron.common import constants
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from neutron.common import exceptions as n_exc
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from neutron import context
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from neutron.db import agents_db
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from neutron.db import db_base_plugin_v2 as base_plugin
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from neutron.tests.unit import testlib_api
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# the below code is required for the following reason
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# (as documented in testscenarios)
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"""Multiply tests depending on their 'scenarios' attribute.
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This can be assigned to 'load_tests' in any test module to make this
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automatically work across tests in the module.
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"""
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load_tests = testscenarios.load_tests_apply_scenarios
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class FakePlugin(base_plugin.NeutronDbPluginV2, agents_db.AgentDbMixin):
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"""A fake plugin class containing all DB methods."""
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class TestAgentsDbBase(testlib_api.SqlTestCase):
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def setUp(self):
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super(TestAgentsDbBase, self).setUp()
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self.context = context.get_admin_context()
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self.plugin = FakePlugin()
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def _get_agents(self, hosts, agent_type):
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return [
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agents_db.Agent(
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binary='foo-agent',
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host=host,
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agent_type=agent_type,
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topic='foo_topic',
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configurations="",
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created_at=timeutils.utcnow(),
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started_at=timeutils.utcnow(),
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heartbeat_timestamp=timeutils.utcnow())
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for host in hosts
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]
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def _save_agents(self, agents):
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for agent in agents:
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with self.context.session.begin(subtransactions=True):
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self.context.session.add(agent)
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def _create_and_save_agents(self, hosts, agent_type, down_agents_count=0):
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agents = self._get_agents(hosts, agent_type)
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# bring down the specified agents
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for agent in agents[:down_agents_count]:
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agent['heartbeat_timestamp'] -= datetime.timedelta(minutes=60)
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self._save_agents(agents)
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return agents
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class TestAgentsDbMixin(TestAgentsDbBase):
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def setUp(self):
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super(TestAgentsDbMixin, self).setUp()
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self.agent_status = {
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'agent_type': 'Open vSwitch agent',
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'binary': 'neutron-openvswitch-agent',
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'host': 'overcloud-notcompute',
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'topic': 'N/A'
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}
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def test_get_enabled_agent_on_host_found(self):
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agents = self._create_and_save_agents(['foo_host'],
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constants.AGENT_TYPE_L3)
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expected = self.plugin.get_enabled_agent_on_host(
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self.context, constants.AGENT_TYPE_L3, 'foo_host')
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self.assertEqual(expected, agents[0])
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def test_get_enabled_agent_on_host_not_found(self):
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with mock.patch.object(agents_db.LOG, 'debug') as mock_log:
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agent = self.plugin.get_enabled_agent_on_host(
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self.context, constants.AGENT_TYPE_L3, 'foo_agent')
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self.assertIsNone(agent)
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self.assertTrue(mock_log.called)
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def _assert_ref_fields_are_equal(self, reference, result):
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"""Compare (key, value) pairs of a reference dict with the result
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Note: the result MAY have additional keys
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"""
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for field, value in reference.items():
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self.assertEqual(value, result[field], field)
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def test_create_or_update_agent_new_entry(self):
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self.plugin.create_or_update_agent(self.context, self.agent_status)
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agent = self.plugin.get_agents(self.context)[0]
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self._assert_ref_fields_are_equal(self.agent_status, agent)
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def test_create_or_update_agent_existing_entry(self):
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self.plugin.create_or_update_agent(self.context, self.agent_status)
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self.plugin.create_or_update_agent(self.context, self.agent_status)
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self.plugin.create_or_update_agent(self.context, self.agent_status)
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agents = self.plugin.get_agents(self.context)
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self.assertEqual(len(agents), 1)
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agent = agents[0]
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self._assert_ref_fields_are_equal(self.agent_status, agent)
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def test_create_or_update_agent_concurrent_insert(self):
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# NOTE(rpodolyaka): emulate violation of the unique constraint caused
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# by a concurrent insert. Ensure we make another
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# attempt on fail
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with mock.patch('sqlalchemy.orm.Session.add') as add_mock:
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add_mock.side_effect = [
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exc.DBDuplicateEntry(),
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None
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]
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self.plugin.create_or_update_agent(self.context, self.agent_status)
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self.assertEqual(add_mock.call_count, 2,
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"Agent entry creation hasn't been retried")
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class TestAgentsDbGetAgents(TestAgentsDbBase):
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scenarios = [
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('Get all agents', dict(agents=5, down_agents=2,
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agents_alive=None,
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expected_agents=5)),
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('Get alive agents (True)', dict(agents=5, down_agents=2,
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agents_alive='True',
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expected_agents=3)),
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('Get down agents (False)', dict(agents=5, down_agents=2,
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agents_alive='False',
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expected_agents=2)),
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('Get alive agents (true)', dict(agents=5, down_agents=2,
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agents_alive='true',
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expected_agents=3)),
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('Get down agents (false)', dict(agents=5, down_agents=2,
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agents_alive='false',
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expected_agents=2)),
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('Get agents invalid alive filter', dict(agents=5, down_agents=2,
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agents_alive='invalid',
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expected_agents=None)),
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]
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def setUp(self):
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# ensure that the first scenario will execute with nosetests
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if not hasattr(self, 'agents'):
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self.__dict__.update(self.scenarios[0][1])
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super(TestAgentsDbGetAgents, self).setUp()
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def test_get_agents(self):
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hosts = ['host-%s' % i for i in range(self.agents)]
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self._create_and_save_agents(hosts, constants.AGENT_TYPE_L3,
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down_agents_count=self.down_agents)
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if self.agents_alive == 'invalid':
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self.assertRaises(n_exc.InvalidInput, self.plugin.get_agents,
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self.context,
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filters={'alive': [self.agents_alive]})
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else:
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returned_agents = self.plugin.get_agents(
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self.context, filters={'alive': [self.agents_alive]}
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if self.agents_alive else None)
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self.assertEqual(self.expected_agents, len(returned_agents))
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if self.agents_alive:
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alive = (self.agents_alive == 'True' or
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self.agents_alive == 'true')
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for agent in returned_agents:
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self.assertEqual(alive, agent['alive'])
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