223 lines
9.3 KiB
Python
223 lines
9.3 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import mock
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from oslo import messaging
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from heat.common import exception
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from heat.db import api as db_api
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from heat.engine import stack_lock
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from heat.tests import common
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from heat.tests import utils
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class StackLockTest(common.HeatTestCase):
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def setUp(self):
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super(StackLockTest, self).setUp()
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self.context = utils.dummy_context()
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self.stack = self.m.CreateMockAnything()
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self.stack.id = "aae01f2d-52ae-47ac-8a0d-3fde3d220fea"
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self.stack.name = "test_stack"
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self.stack.action = "CREATE"
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self.engine_id = stack_lock.StackLock.generate_engine_id()
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class TestThreadLockException(Exception):
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pass
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def test_successful_acquire_new_lock(self):
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self.m.StubOutWithMock(db_api, "stack_lock_create")
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db_api.stack_lock_create(
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self.stack.id, self.engine_id).AndReturn(None)
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self.m.ReplayAll()
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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slock.acquire()
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self.m.VerifyAll()
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def test_failed_acquire_existing_lock_current_engine(self):
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self.m.StubOutWithMock(db_api, "stack_lock_create")
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db_api.stack_lock_create(
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self.stack.id, self.engine_id).AndReturn(self.engine_id)
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self.m.ReplayAll()
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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self.assertRaises(exception.ActionInProgress, slock.acquire)
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self.m.VerifyAll()
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def test_successful_acquire_existing_lock_engine_dead(self):
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self.m.StubOutWithMock(db_api, "stack_lock_create")
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db_api.stack_lock_create(
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self.stack.id, self.engine_id).AndReturn("fake-engine-id")
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self.m.StubOutWithMock(db_api, "stack_lock_steal")
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db_api.stack_lock_steal(self.stack.id, "fake-engine-id",
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self.engine_id).AndReturn(None)
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self.m.ReplayAll()
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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self.patchobject(slock, 'engine_alive', return_value=False)
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slock.acquire()
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self.m.VerifyAll()
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def test_failed_acquire_existing_lock_engine_alive(self):
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self.m.StubOutWithMock(db_api, "stack_lock_create")
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db_api.stack_lock_create(
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self.stack.id, self.engine_id).AndReturn("fake-engine-id")
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self.m.ReplayAll()
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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self.patchobject(slock, 'engine_alive', return_value=True)
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self.assertRaises(exception.ActionInProgress, slock.acquire)
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self.m.VerifyAll()
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def test_failed_acquire_existing_lock_engine_dead(self):
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self.m.StubOutWithMock(db_api, "stack_lock_create")
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db_api.stack_lock_create(
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self.stack.id, self.engine_id).AndReturn("fake-engine-id")
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self.m.StubOutWithMock(db_api, "stack_lock_steal")
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db_api.stack_lock_steal(
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self.stack.id, "fake-engine-id",
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self.engine_id).AndReturn("fake-engine-id2")
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self.m.ReplayAll()
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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self.patchobject(slock, 'engine_alive', return_value=False)
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self.assertRaises(exception.ActionInProgress, slock.acquire)
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self.m.VerifyAll()
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def test_successful_acquire_with_retry(self):
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self.m.StubOutWithMock(db_api, "stack_lock_create")
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db_api.stack_lock_create(
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self.stack.id, self.engine_id).AndReturn("fake-engine-id")
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self.m.StubOutWithMock(db_api, "stack_lock_steal")
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db_api.stack_lock_steal(
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self.stack.id, "fake-engine-id", self.engine_id).AndReturn(True)
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db_api.stack_lock_create(
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self.stack.id, self.engine_id).AndReturn("fake-engine-id")
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db_api.stack_lock_steal(
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self.stack.id, "fake-engine-id", self.engine_id).AndReturn(None)
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self.m.ReplayAll()
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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self.patchobject(slock, 'engine_alive', return_value=False)
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slock.acquire()
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self.m.VerifyAll()
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def test_failed_acquire_one_retry_only(self):
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self.m.StubOutWithMock(db_api, "stack_lock_create")
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db_api.stack_lock_create(
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self.stack.id, self.engine_id).AndReturn("fake-engine-id")
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self.m.StubOutWithMock(db_api, "stack_lock_steal")
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db_api.stack_lock_steal(
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self.stack.id, "fake-engine-id", self.engine_id).AndReturn(True)
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db_api.stack_lock_create(
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self.stack.id, self.engine_id).AndReturn("fake-engine-id")
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db_api.stack_lock_steal(
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self.stack.id, "fake-engine-id", self.engine_id).AndReturn(True)
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self.m.ReplayAll()
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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self.patchobject(slock, 'engine_alive', return_value=False)
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self.assertRaises(exception.ActionInProgress, slock.acquire)
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self.m.VerifyAll()
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def test_thread_lock_context_mgr_exception(self):
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db_api.stack_lock_create = mock.Mock(return_value=None)
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db_api.stack_lock_release = mock.Mock(return_value=None)
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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def check_thread_lock():
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with slock.thread_lock(self.stack.id):
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self.assertEqual(1, db_api.stack_lock_create.call_count)
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raise self.TestThreadLockException
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self.assertRaises(self.TestThreadLockException, check_thread_lock)
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self.assertEqual(1, db_api.stack_lock_release.call_count)
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def test_thread_lock_context_mgr_no_exception(self):
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db_api.stack_lock_create = mock.Mock(return_value=None)
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db_api.stack_lock_release = mock.Mock(return_value=None)
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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with slock.thread_lock(self.stack.id):
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self.assertEqual(1, db_api.stack_lock_create.call_count)
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assert not db_api.stack_lock_release.called
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def test_try_thread_lock_context_mgr_exception(self):
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db_api.stack_lock_create = mock.Mock(return_value=None)
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db_api.stack_lock_release = mock.Mock(return_value=None)
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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def check_thread_lock():
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with slock.try_thread_lock(self.stack.id):
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self.assertEqual(1, db_api.stack_lock_create.call_count)
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raise self.TestThreadLockException
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self.assertRaises(self.TestThreadLockException, check_thread_lock)
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self.assertEqual(1, db_api.stack_lock_release.call_count)
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def test_try_thread_lock_context_mgr_no_exception(self):
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db_api.stack_lock_create = mock.Mock(return_value=None)
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db_api.stack_lock_release = mock.Mock(return_value=None)
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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with slock.try_thread_lock(self.stack.id):
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self.assertEqual(1, db_api.stack_lock_create.call_count)
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assert not db_api.stack_lock_release.called
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def test_try_thread_lock_context_mgr_existing_lock(self):
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db_api.stack_lock_create = mock.Mock(return_value=1234)
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db_api.stack_lock_release = mock.Mock(return_value=None)
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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def check_thread_lock():
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with slock.try_thread_lock(self.stack.id):
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self.assertEqual(1, db_api.stack_lock_create.call_count)
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raise self.TestThreadLockException
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self.assertRaises(self.TestThreadLockException, check_thread_lock)
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assert not db_api.stack_lock_release.called
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def test_engine_alive_ok(self):
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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mget_client = self.patchobject(stack_lock.rpc_messaging,
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'get_rpc_client')
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mclient = mget_client.return_value
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mclient_ctx = mclient.prepare.return_value
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mclient_ctx.call.return_value = True
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ret = slock.engine_alive(self.context, self.engine_id)
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self.assertTrue(ret)
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mclient.prepare.assert_called_once_with(timeout=2)
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mclient_ctx.call.assert_called_once_with(self.context, 'listening')
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def test_engine_alive_timeout(self):
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slock = stack_lock.StackLock(self.context, self.stack, self.engine_id)
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mget_client = self.patchobject(stack_lock.rpc_messaging,
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'get_rpc_client')
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mclient = mget_client.return_value
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mclient_ctx = mclient.prepare.return_value
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mclient_ctx.call.side_effect = messaging.MessagingTimeout('too slow')
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ret = slock.engine_alive(self.context, self.engine_id)
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self.assertIs(False, ret)
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mclient.prepare.assert_called_once_with(timeout=2)
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mclient_ctx.call.assert_called_once_with(self.context, 'listening')
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