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# Copyright 2016 Mellanox Technologies, Ltd
#
# 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 datetime import datetime
from datetime import timedelta
import mock
from neutron.tests.unit import testlib_api
from neutron_lib import context
from oslo_db import exception
from networking_mlnx.db import db
from networking_mlnx.db.models import sdn_journal_db
from networking_mlnx.db.models import sdn_maintenance_db
from networking_mlnx.plugins.ml2.drivers.sdn import constants as sdn_const
class DbTestCase(testlib_api.SqlTestCaseLight):
UPDATE_ROW = [sdn_const.NETWORK, 'id', sdn_const.PUT,
{'test': 'data'}]
def setUp(self):
super(DbTestCase, self).setUp()
self.db_context = context.get_admin_context()
self.db_session = self.db_context.session
self.addCleanup(self._db_cleanup)
def _db_cleanup(self):
self.db_session.query(sdn_journal_db.SdnJournal).delete()
def _update_row(self, row):
self.db_session.merge(row)
self.db_session.flush()
def _test_validate_updates(self, rows, time_deltas, expected_validations):
for row in rows:
db.create_pending_row(self.db_session, *row)
# update row created_at
rows = db.get_all_db_rows(self.db_session)
now = datetime.now()
for row, time_delta in zip(rows, time_deltas):
row.created_at = now - timedelta(hours=time_delta)
self._update_row(row)
# validate if there are older rows
for row, expected_valid in zip(rows, expected_validations):
valid = not db.check_for_older_ops(self.db_session, row)
self.assertEqual(expected_valid, valid)
def _test_retry_count(self, retry_num, max_retry,
expected_retry_count, expected_state):
# add new pending row
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
# update the row with the requested retry_num
row = db.get_all_db_rows(self.db_session)[0]
row.retry_count = retry_num - 1
db.update_pending_db_row_retry(self.db_session, row, max_retry)
# validate the state and the retry_count of the row
row = db.get_all_db_rows(self.db_session)[0]
self.assertEqual(expected_state, row.state)
self.assertEqual(expected_retry_count, row.retry_count)
def _test_update_row_state(self, from_state, to_state):
# add new pending row
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
row = db.get_all_db_rows(self.db_session)[0]
for state in [from_state, to_state]:
# update the row state
db.update_db_row_state(self.db_session, row, state)
# validate the new state
row = db.get_all_db_rows(self.db_session)[0]
self.assertEqual(state, row.state)
def test_validate_updates_same_object_uuid(self):
self._test_validate_updates(
[self.UPDATE_ROW, self.UPDATE_ROW], [1, 0], [True, False])
def test_validate_updates_same_created_time(self):
self._test_validate_updates(
[self.UPDATE_ROW, self.UPDATE_ROW], [0, 0], [True, True])
def test_validate_updates_different_object_uuid(self):
other_row = list(self.UPDATE_ROW)
other_row[1] += 'a'
self._test_validate_updates(
[self.UPDATE_ROW, other_row], [1, 0], [True, True])
def test_validate_updates_different_object_type(self):
other_row = list(self.UPDATE_ROW)
other_row[0] = sdn_const.PORT
other_row[1] += 'a'
self._test_validate_updates(
[self.UPDATE_ROW, other_row], [1, 0], [True, True])
def test_get_oldest_pending_row_none_when_no_rows(self):
row = db.get_oldest_pending_db_row_with_lock(self.db_session)
self.assertIsNone(row)
def _test_get_oldest_pending_row_none(self, state):
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
row = db.get_all_db_rows(self.db_session)[0]
row.state = state
self._update_row(row)
row = db.get_oldest_pending_db_row_with_lock(self.db_session)
self.assertIsNone(row)
def test_get_oldest_pending_row_none_when_row_processing(self):
self._test_get_oldest_pending_row_none(sdn_const.PROCESSING)
def test_get_oldest_pending_row_none_when_row_failed(self):
self._test_get_oldest_pending_row_none(sdn_const.FAILED)
def test_get_oldest_pending_row_none_when_row_completed(self):
self._test_get_oldest_pending_row_none(sdn_const.COMPLETED)
def test_get_oldest_pending_row_none_when_row_monitoring(self):
self._test_get_oldest_pending_row_none(sdn_const.MONITORING)
def test_get_oldest_pending_row(self):
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
row = db.get_oldest_pending_db_row_with_lock(self.db_session)
self.assertIsNotNone(row)
self.assertEqual(sdn_const.PROCESSING, row.state)
def test_get_oldest_pending_row_order(self):
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
older_row = db.get_all_db_rows(self.db_session)[0]
older_row.last_retried -= timedelta(minutes=1)
self._update_row(older_row)
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
row = db.get_oldest_pending_db_row_with_lock(self.db_session)
self.assertEqual(older_row, row)
def test_get_all_monitoring_db_row_by_oldest_order(self):
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
older_row = db.get_all_db_rows(self.db_session)[1]
older_row.last_retried -= timedelta(minutes=1)
older_row.state = sdn_const.MONITORING
self._update_row(older_row)
newer_row = db.get_all_db_rows(self.db_session)[0]
newer_row.state = sdn_const.MONITORING
self._update_row(newer_row)
rows = db.get_all_monitoring_db_row_by_oldest(self.db_session)
self.assertEqual(older_row, rows[0])
self.assertEqual(newer_row, rows[1])
def test_get_oldest_pending_row_when_deadlock(self):
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
update_mock = (
mock.MagicMock(side_effect=(exception.DBDeadlock, mock.DEFAULT)))
# Mocking is mandatory to achieve a deadlock regardless of the DB
# backend being used when running the tests
with mock.patch.object(db, 'update_db_row_state', new=update_mock):
row = db.get_oldest_pending_db_row_with_lock(self.db_session)
self.assertIsNotNone(row)
self.assertEqual(2, update_mock.call_count)
def _test_delete_rows_by_state_and_time(self, last_retried, row_retention,
state, expected_rows):
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
# update state and last retried
row = db.get_all_db_rows(self.db_session)[0]
row.state = state
row.last_retried = row.last_retried - timedelta(seconds=last_retried)
self._update_row(row)
db.delete_rows_by_state_and_time(self.db_session,
sdn_const.COMPLETED,
timedelta(seconds=row_retention))
# validate the number of rows in the journal
rows = db.get_all_db_rows(self.db_session)
self.assertEqual(expected_rows, len(rows))
def test_delete_completed_rows_no_new_rows(self):
self._test_delete_rows_by_state_and_time(0, 10, sdn_const.COMPLETED, 1)
def test_delete_completed_rows_one_new_row(self):
self._test_delete_rows_by_state_and_time(6, 5, sdn_const.COMPLETED, 0)
def test_delete_completed_rows_wrong_state(self):
self._test_delete_rows_by_state_and_time(10, 8, sdn_const.PENDING, 1)
def test_valid_retry_count(self):
self._test_retry_count(1, 1, 1, sdn_const.PENDING)
def test_invalid_retry_count(self):
self._test_retry_count(2, 1, 1, sdn_const.FAILED)
def test_update_row_state_to_pending(self):
self._test_update_row_state(sdn_const.PROCESSING, sdn_const.PENDING)
def test_update_row_state_to_processing(self):
self._test_update_row_state(sdn_const.PENDING, sdn_const.PROCESSING)
def test_update_row_state_to_failed(self):
self._test_update_row_state(sdn_const.PROCESSING, sdn_const.FAILED)
def test_update_row_state_to_monitoring(self):
self._test_update_row_state(sdn_const.PROCESSING, sdn_const.MONITORING)
def test_update_row_state_to_completed(self):
self._test_update_row_state(sdn_const.PROCESSING, sdn_const.COMPLETED)
def test_update_row_job_id(self):
# add new pending row
expected_job_id = 'job_id'
db.create_pending_row(self.db_session, *self.UPDATE_ROW)
row = db.get_all_db_rows(self.db_session)[0]
db.update_db_row_job_id(self.db_session, row, expected_job_id)
row = db.get_all_db_rows(self.db_session)[0]
self.assertEqual(expected_job_id, row.job_id)
def _test_maintenance_lock_unlock(self, db_func, existing_state,
expected_state, expected_result):
row = sdn_maintenance_db.SdnMaintenance(id='test',
state=existing_state)
self.db_session.add(row)
self.db_session.flush()
self.assertEqual(expected_result, db_func(self.db_session))
row = self.db_session.query(sdn_maintenance_db.SdnMaintenance).one()
self.assertEqual(expected_state, row['state'])
def test_lock_maintenance(self):
self._test_maintenance_lock_unlock(db.lock_maintenance,
sdn_const.PENDING,
sdn_const.PROCESSING,
True)
def test_lock_maintenance_fails_when_processing(self):
self._test_maintenance_lock_unlock(db.lock_maintenance,
sdn_const.PROCESSING,
sdn_const.PROCESSING,
False)
def test_unlock_maintenance(self):
self._test_maintenance_lock_unlock(db.unlock_maintenance,
sdn_const.PROCESSING,
sdn_const.PENDING,
True)
def test_unlock_maintenance_fails_when_pending(self):
self._test_maintenance_lock_unlock(db.unlock_maintenance,
sdn_const.PENDING,
sdn_const.PENDING,
False)
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