Load Balancing as a Service (LBaaS) for OpenStack
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octavia/octavia/tests/unit/controller/healthmanager/test_health_manager.py

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6.1 KiB

# Copyright 2015 Hewlett-Packard Development Company, L.P.
#
# 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 threading
from unittest import mock
from oslo_config import cfg
from oslo_config import fixture as oslo_fixture
from oslo_db import exception as db_exc
from oslo_utils import uuidutils
from octavia.controller.healthmanager import health_manager as healthmanager
import octavia.tests.unit.base as base
CONF = cfg.CONF
AMPHORA_ID = uuidutils.generate_uuid()
class TestException(Exception):
def __init__(self, value):
self.value = value
def __str__(self):
return repr(self.value)
class TestHealthManager(base.TestCase):
def setUp(self):
super(TestHealthManager, self).setUp()
@mock.patch('octavia.db.api.wait_for_connection')
@mock.patch('octavia.controller.worker.v1.controller_worker.'
'ControllerWorker.failover_amphora')
@mock.patch('octavia.controller.worker.v2.controller_worker.'
'ControllerWorker.failover_amphora')
@mock.patch('octavia.db.repositories.AmphoraHealthRepository.'
'get_stale_amphora')
@mock.patch('octavia.db.api.get_session')
def test_health_check_stale_amphora(self, session_mock, get_stale_amp_mock,
failover_mockv2, failover_mock,
db_wait_mock):
conf = oslo_fixture.Config(cfg.CONF)
conf.config(group="health_manager", heartbeat_timeout=5)
amphora_health = mock.MagicMock()
amphora_health.amphora_id = AMPHORA_ID
get_stale_amp_mock.side_effect = [amphora_health, None]
exit_event = threading.Event()
hm = healthmanager.HealthManager(exit_event)
hm.health_check()
# Test DBDeadlock and RetryRequest exceptions
session_mock.reset_mock()
get_stale_amp_mock.reset_mock()
mock_session = mock.MagicMock()
session_mock.return_value = mock_session
get_stale_amp_mock.side_effect = [
db_exc.DBDeadlock,
db_exc.RetryRequest(Exception('retry_test')),
db_exc.DBConnectionError,
TestException('test')]
# Test that a DBDeadlock does not raise an exception
self.assertIsNone(hm.health_check())
# Test that a RetryRequest does not raise an exception
self.assertIsNone(hm.health_check())
# Test that a DBConnectionError does not raise an exception
self.assertIsNone(hm.health_check())
# ... and that it waits for DB reconnection
db_wait_mock.assert_called_once()
# Other exceptions should raise
self.assertRaises(TestException, hm.health_check)
self.assertEqual(4, mock_session.rollback.call_count)
@mock.patch('octavia.controller.worker.v1.controller_worker.'
'ControllerWorker.failover_amphora')
@mock.patch('octavia.controller.worker.v2.controller_worker.'
'ControllerWorker.failover_amphora')
@mock.patch('octavia.db.repositories.AmphoraHealthRepository.'
'get_stale_amphora', return_value=None)
@mock.patch('octavia.db.api.get_session')
def test_health_check_nonstale_amphora(self, session_mock,
get_stale_amp_mock, failover_mockv2,
failover_mock):
get_stale_amp_mock.side_effect = [None, TestException('test')]
exit_event = threading.Event()
hm = healthmanager.HealthManager(exit_event)
hm.health_check()
session_mock.assert_called_once_with(autocommit=False)
if CONF.api_settings.default_provider_driver == 'amphorav2':
self.assertFalse(failover_mockv2.called)
else:
self.assertFalse(failover_mock.called)
@mock.patch('octavia.controller.worker.v1.controller_worker.'
'ControllerWorker.failover_amphora')
@mock.patch('octavia.controller.worker.v2.controller_worker.'
'ControllerWorker.failover_amphora')
@mock.patch('octavia.db.repositories.AmphoraHealthRepository.'
'get_stale_amphora', return_value=None)
@mock.patch('octavia.db.api.get_session')
def test_health_check_exit(self, session_mock, get_stale_amp_mock,
failover_mockv2, failover_mock):
get_stale_amp_mock.return_value = None
exit_event = threading.Event()
hm = healthmanager.HealthManager(exit_event)
hm.health_check()
session_mock.assert_called_once_with(autocommit=False)
if CONF.api_settings.default_provider_driver == 'amphorav2':
self.assertFalse(failover_mockv2.called)
else:
self.assertFalse(failover_mock.called)
@mock.patch('octavia.controller.worker.v1.controller_worker.'
'ControllerWorker.failover_amphora')
@mock.patch('octavia.controller.worker.v2.controller_worker.'
'ControllerWorker.failover_amphora')
@mock.patch('octavia.db.repositories.AmphoraHealthRepository.'
'get_stale_amphora', return_value=None)
@mock.patch('octavia.db.api.get_session')
def test_health_check_db_error(self, session_mock, get_stale_amp_mock,
failover_mockv2, failover_mock):
get_stale_amp_mock.return_value = None
mock_session = mock.MagicMock()
session_mock.return_value = mock_session
session_mock.side_effect = TestException('DB Error')
exit_event = threading.Event()
hm = healthmanager.HealthManager(exit_event)
self.assertRaises(TestException, hm.health_check)
self.assertEqual(0, mock_session.rollback.call_count)