diff options
| -rw-r--r-- | changelog.d/11255.bugfix | 1 | ||||
| -rw-r--r-- | synapse/storage/prepare_database.py | 23 | ||||
| -rw-r--r-- | tests/storage/test_rollback_worker.py | 69 |
3 files changed, 82 insertions, 11 deletions
diff --git a/changelog.d/11255.bugfix b/changelog.d/11255.bugfix new file mode 100644 index 0000000000..ce72592624 --- /dev/null +++ b/changelog.d/11255.bugfix @@ -0,0 +1 @@ +Fix rolling back Synapse version when using workers. diff --git a/synapse/storage/prepare_database.py b/synapse/storage/prepare_database.py index 1629d2a53c..b5c1c14ee3 100644 --- a/synapse/storage/prepare_database.py +++ b/synapse/storage/prepare_database.py @@ -133,22 +133,23 @@ def prepare_database( # if it's a worker app, refuse to upgrade the database, to avoid multiple # workers doing it at once. - if ( - config.worker.worker_app is not None - and version_info.current_version != SCHEMA_VERSION - ): + if config.worker.worker_app is None: + _upgrade_existing_database( + cur, + version_info, + database_engine, + config, + databases=databases, + ) + elif version_info.current_version < SCHEMA_VERSION: + # If the DB is on an older version than we expect the we refuse + # to start the worker (as the main process needs to run first to + # update the schema). raise UpgradeDatabaseException( OUTDATED_SCHEMA_ON_WORKER_ERROR % (SCHEMA_VERSION, version_info.current_version) ) - _upgrade_existing_database( - cur, - version_info, - database_engine, - config, - databases=databases, - ) else: logger.info("%r: Initialising new database", databases) diff --git a/tests/storage/test_rollback_worker.py b/tests/storage/test_rollback_worker.py new file mode 100644 index 0000000000..a6be9a1bb1 --- /dev/null +++ b/tests/storage/test_rollback_worker.py @@ -0,0 +1,69 @@ +# Copyright 2021 The Matrix.org Foundation C.I.C. +# +# 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 synapse.app.generic_worker import GenericWorkerServer +from synapse.storage.database import LoggingDatabaseConnection +from synapse.storage.prepare_database import PrepareDatabaseException, prepare_database +from synapse.storage.schema import SCHEMA_VERSION + +from tests.unittest import HomeserverTestCase + + +class WorkerSchemaTests(HomeserverTestCase): + def make_homeserver(self, reactor, clock): + hs = self.setup_test_homeserver( + federation_http_client=None, homeserver_to_use=GenericWorkerServer + ) + return hs + + def default_config(self): + conf = super().default_config() + + # Mark this as a worker app. + conf["worker_app"] = "yes" + + return conf + + def test_rolling_back(self): + """Test that workers can start if the DB is a newer schema version""" + + db_pool = self.hs.get_datastore().db_pool + db_conn = LoggingDatabaseConnection( + db_pool._db_pool.connect(), + db_pool.engine, + "tests", + ) + + cur = db_conn.cursor() + cur.execute("UPDATE schema_version SET version = ?", (SCHEMA_VERSION + 1,)) + + db_conn.commit() + + prepare_database(db_conn, db_pool.engine, self.hs.config) + + def test_not_upgraded(self): + """Test that workers don't start if the DB has an older schema version""" + db_pool = self.hs.get_datastore().db_pool + db_conn = LoggingDatabaseConnection( + db_pool._db_pool.connect(), + db_pool.engine, + "tests", + ) + + cur = db_conn.cursor() + cur.execute("UPDATE schema_version SET version = ?", (SCHEMA_VERSION - 1,)) + + db_conn.commit() + + with self.assertRaises(PrepareDatabaseException): + prepare_database(db_conn, db_pool.engine, self.hs.config) |