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# Copyright 2012 IBM Corp.
#
# 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.
from unittest import mock
import oslo_messaging as messaging
from oslo_utils import fixture as utils_fixture
from oslo_utils import timeutils
from nova import exception
from nova import objects
from nova import servicegroup
from nova import test
class DBServiceGroupTestCase(test.NoDBTestCase):
def setUp(self):
super(DBServiceGroupTestCase, self).setUp()
self.down_time = 15
self.flags(service_down_time=self.down_time,
servicegroup_driver='db')
self.servicegroup_api = servicegroup.API()
def test_is_up(self):
now = timeutils.utcnow()
service = objects.Service(
host='fake-host',
topic='compute',
binary='nova-compute',
created_at=now,
updated_at=now,
last_seen_up=now,
forced_down=False,
)
time_fixture = self.useFixture(utils_fixture.TimeFixture(now))
# Up (equal)
result = self.servicegroup_api.service_is_up(service)
self.assertTrue(result)
# Up
time_fixture.advance_time_seconds(self.down_time)
result = self.servicegroup_api.service_is_up(service)
self.assertTrue(result)
# Down
time_fixture.advance_time_seconds(1)
result = self.servicegroup_api.service_is_up(service)
self.assertFalse(result)
# "last_seen_up" says down, "updated_at" says up.
# This can happen if we do a service disable/enable while it's down.
service.updated_at = timeutils.utcnow()
result = self.servicegroup_api.service_is_up(service)
self.assertFalse(result)
# "last_seen_up" is none before compute node reports its status,
# just use 'created_at' as last_heartbeat.
service.last_seen_up = None
service.created_at = timeutils.utcnow()
result = self.servicegroup_api.service_is_up(service)
self.assertTrue(result)
def test_join(self):
service = mock.MagicMock(report_interval=1)
self.servicegroup_api.join('fake-host', 'fake-topic', service)
fn = self.servicegroup_api._driver._report_state
service.tg.add_timer_args.assert_called_once_with(
1, fn, args=[service], initial_delay=5)
@mock.patch.object(objects.Service, 'save')
def test_report_state(self, upd_mock):
service_ref = objects.Service(host='fake-host', topic='compute',
report_count=10)
service = mock.MagicMock(model_disconnected=False,
service_ref=service_ref)
fn = self.servicegroup_api._driver._report_state
fn(service)
upd_mock.assert_called_once_with()
self.assertEqual(11, service_ref.report_count)
self.assertFalse(service.model_disconnected)
@mock.patch.object(objects.Service, 'save')
def _test_report_state_error(self, exc_cls, upd_mock):
upd_mock.side_effect = exc_cls("service save failed")
service_ref = objects.Service(host='fake-host', topic='compute',
report_count=10, binary='nova-compute')
service = mock.MagicMock(model_disconnected=False,
service_ref=service_ref)
fn = self.servicegroup_api._driver._report_state
fn(service) # fail if exception not caught
self.assertTrue(service.model_disconnected)
return service_ref
def test_report_state_error_handling_timeout(self):
self._test_report_state_error(messaging.MessagingTimeout)
def test_report_state_unexpected_error(self):
self._test_report_state_error(RuntimeError)
def test_report_state_service_not_found(self):
service_ref = self._test_report_state_error(exception.ServiceNotFound)
self.assertIn('The services table record for the %s service on '
'host %s is gone.' %
(service_ref.binary, service_ref.host),
self.stdlog.logger.output)
def test_get_updated_time(self):
retval = "2016-11-02T22:40:31.000000"
service_ref = {
'host': 'fake-host',
'topic': 'compute',
'updated_at': retval
}
result = self.servicegroup_api.get_updated_time(service_ref)
self.assertEqual(retval, result)
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