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![Erik Johnston](/assets/img/avatar_default.png)
On startup `MultiWriteIdGenerator` fetches the maximum stream ID for each instance from the table and uses that as its initial "current position" for each writer. This is problematic as a) it involves either a scan of events table or an index (neither of which is ideal), and b) if rows are being persisted out of order elsewhere while the process restarts then using the maximum stream ID is not correct. This could theoretically lead to race conditions where e.g. events that are persisted out of order are not sent down sync streams. We fix this by creating a new table that tracks the current positions of each writer to the stream, and update it each time we finish persisting a new entry. This is a relatively small overhead when persisting events. However for the cache invalidation stream this is a much bigger relative overhead, so instead we note that for invalidation we don't actually care about reliability over restarts (as there's no caches to invalidate) and simply don't bother reading and writing to the new table in that particular case.
623 lines
22 KiB
Python
623 lines
22 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2018 New Vector Ltd
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import calendar
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import logging
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import time
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from typing import Any, Dict, List, Optional, Tuple
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from synapse.api.constants import PresenceState
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from synapse.config.homeserver import HomeServerConfig
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from synapse.storage.database import DatabasePool
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from synapse.storage.engines import PostgresEngine
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from synapse.storage.util.id_generators import (
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IdGenerator,
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MultiWriterIdGenerator,
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StreamIdGenerator,
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)
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from synapse.types import get_domain_from_id
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from synapse.util.caches.stream_change_cache import StreamChangeCache
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from .account_data import AccountDataStore
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from .appservice import ApplicationServiceStore, ApplicationServiceTransactionStore
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from .cache import CacheInvalidationWorkerStore
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from .censor_events import CensorEventsStore
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from .client_ips import ClientIpStore
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from .deviceinbox import DeviceInboxStore
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from .devices import DeviceStore
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from .directory import DirectoryStore
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from .e2e_room_keys import EndToEndRoomKeyStore
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from .end_to_end_keys import EndToEndKeyStore
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from .event_federation import EventFederationStore
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from .event_push_actions import EventPushActionsStore
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from .events_bg_updates import EventsBackgroundUpdatesStore
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from .filtering import FilteringStore
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from .group_server import GroupServerStore
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from .keys import KeyStore
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from .media_repository import MediaRepositoryStore
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from .metrics import ServerMetricsStore
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from .monthly_active_users import MonthlyActiveUsersStore
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from .openid import OpenIdStore
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from .presence import PresenceStore, UserPresenceState
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from .profile import ProfileStore
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from .purge_events import PurgeEventsStore
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from .push_rule import PushRuleStore
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from .pusher import PusherStore
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from .receipts import ReceiptsStore
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from .registration import RegistrationStore
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from .rejections import RejectionsStore
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from .relations import RelationsStore
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from .room import RoomStore
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from .roommember import RoomMemberStore
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from .search import SearchStore
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from .signatures import SignatureStore
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from .state import StateStore
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from .stats import StatsStore
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from .stream import StreamStore
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from .tags import TagsStore
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from .transactions import TransactionStore
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from .ui_auth import UIAuthStore
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from .user_directory import UserDirectoryStore
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from .user_erasure_store import UserErasureStore
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logger = logging.getLogger(__name__)
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class DataStore(
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EventsBackgroundUpdatesStore,
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RoomMemberStore,
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RoomStore,
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RegistrationStore,
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StreamStore,
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ProfileStore,
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PresenceStore,
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TransactionStore,
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DirectoryStore,
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KeyStore,
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StateStore,
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SignatureStore,
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ApplicationServiceStore,
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PurgeEventsStore,
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EventFederationStore,
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MediaRepositoryStore,
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RejectionsStore,
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FilteringStore,
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PusherStore,
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PushRuleStore,
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ApplicationServiceTransactionStore,
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ReceiptsStore,
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EndToEndKeyStore,
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EndToEndRoomKeyStore,
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SearchStore,
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TagsStore,
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AccountDataStore,
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EventPushActionsStore,
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OpenIdStore,
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ClientIpStore,
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DeviceStore,
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DeviceInboxStore,
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UserDirectoryStore,
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GroupServerStore,
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UserErasureStore,
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MonthlyActiveUsersStore,
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StatsStore,
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RelationsStore,
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CensorEventsStore,
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UIAuthStore,
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CacheInvalidationWorkerStore,
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ServerMetricsStore,
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):
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def __init__(self, database: DatabasePool, db_conn, hs):
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self.hs = hs
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self._clock = hs.get_clock()
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self.database_engine = database.engine
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self._presence_id_gen = StreamIdGenerator(
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db_conn, "presence_stream", "stream_id"
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)
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self._device_inbox_id_gen = StreamIdGenerator(
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db_conn, "device_inbox", "stream_id"
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)
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self._public_room_id_gen = StreamIdGenerator(
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db_conn, "public_room_list_stream", "stream_id"
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)
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self._device_list_id_gen = StreamIdGenerator(
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db_conn,
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"device_lists_stream",
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"stream_id",
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extra_tables=[
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("user_signature_stream", "stream_id"),
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("device_lists_outbound_pokes", "stream_id"),
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],
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)
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self._cross_signing_id_gen = StreamIdGenerator(
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db_conn, "e2e_cross_signing_keys", "stream_id"
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)
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self._access_tokens_id_gen = IdGenerator(db_conn, "access_tokens", "id")
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self._event_reports_id_gen = IdGenerator(db_conn, "event_reports", "id")
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self._push_rule_id_gen = IdGenerator(db_conn, "push_rules", "id")
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self._push_rules_enable_id_gen = IdGenerator(db_conn, "push_rules_enable", "id")
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self._pushers_id_gen = StreamIdGenerator(
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db_conn, "pushers", "id", extra_tables=[("deleted_pushers", "stream_id")]
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)
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self._group_updates_id_gen = StreamIdGenerator(
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db_conn, "local_group_updates", "stream_id"
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)
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if isinstance(self.database_engine, PostgresEngine):
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# We set the `writers` to an empty list here as we don't care about
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# missing updates over restarts, as we'll not have anything in our
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# caches to invalidate. (This reduces the amount of writes to the DB
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# that happen).
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self._cache_id_gen = MultiWriterIdGenerator(
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db_conn,
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database,
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stream_name="caches",
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instance_name=hs.get_instance_name(),
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table="cache_invalidation_stream_by_instance",
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instance_column="instance_name",
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id_column="stream_id",
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sequence_name="cache_invalidation_stream_seq",
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writers=[],
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)
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else:
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self._cache_id_gen = None
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super().__init__(database, db_conn, hs)
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self._presence_on_startup = self._get_active_presence(db_conn)
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presence_cache_prefill, min_presence_val = self.db_pool.get_cache_dict(
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db_conn,
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"presence_stream",
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entity_column="user_id",
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stream_column="stream_id",
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max_value=self._presence_id_gen.get_current_token(),
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)
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self.presence_stream_cache = StreamChangeCache(
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"PresenceStreamChangeCache",
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min_presence_val,
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prefilled_cache=presence_cache_prefill,
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)
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max_device_inbox_id = self._device_inbox_id_gen.get_current_token()
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device_inbox_prefill, min_device_inbox_id = self.db_pool.get_cache_dict(
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db_conn,
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"device_inbox",
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entity_column="user_id",
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stream_column="stream_id",
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max_value=max_device_inbox_id,
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limit=1000,
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)
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self._device_inbox_stream_cache = StreamChangeCache(
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"DeviceInboxStreamChangeCache",
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min_device_inbox_id,
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prefilled_cache=device_inbox_prefill,
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)
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# The federation outbox and the local device inbox uses the same
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# stream_id generator.
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device_outbox_prefill, min_device_outbox_id = self.db_pool.get_cache_dict(
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db_conn,
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"device_federation_outbox",
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entity_column="destination",
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stream_column="stream_id",
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max_value=max_device_inbox_id,
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limit=1000,
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)
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self._device_federation_outbox_stream_cache = StreamChangeCache(
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"DeviceFederationOutboxStreamChangeCache",
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min_device_outbox_id,
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prefilled_cache=device_outbox_prefill,
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)
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device_list_max = self._device_list_id_gen.get_current_token()
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self._device_list_stream_cache = StreamChangeCache(
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"DeviceListStreamChangeCache", device_list_max
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)
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self._user_signature_stream_cache = StreamChangeCache(
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"UserSignatureStreamChangeCache", device_list_max
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)
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self._device_list_federation_stream_cache = StreamChangeCache(
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"DeviceListFederationStreamChangeCache", device_list_max
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)
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events_max = self._stream_id_gen.get_current_token()
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curr_state_delta_prefill, min_curr_state_delta_id = self.db_pool.get_cache_dict(
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db_conn,
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"current_state_delta_stream",
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entity_column="room_id",
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stream_column="stream_id",
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max_value=events_max, # As we share the stream id with events token
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limit=1000,
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)
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self._curr_state_delta_stream_cache = StreamChangeCache(
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"_curr_state_delta_stream_cache",
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min_curr_state_delta_id,
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prefilled_cache=curr_state_delta_prefill,
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)
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_group_updates_prefill, min_group_updates_id = self.db_pool.get_cache_dict(
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db_conn,
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"local_group_updates",
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entity_column="user_id",
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stream_column="stream_id",
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max_value=self._group_updates_id_gen.get_current_token(),
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limit=1000,
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)
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self._group_updates_stream_cache = StreamChangeCache(
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"_group_updates_stream_cache",
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min_group_updates_id,
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prefilled_cache=_group_updates_prefill,
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)
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self._stream_order_on_start = self.get_room_max_stream_ordering()
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self._min_stream_order_on_start = self.get_room_min_stream_ordering()
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# Used in _generate_user_daily_visits to keep track of progress
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self._last_user_visit_update = self._get_start_of_day()
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def get_device_stream_token(self) -> int:
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return self._device_list_id_gen.get_current_token()
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def take_presence_startup_info(self):
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active_on_startup = self._presence_on_startup
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self._presence_on_startup = None
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return active_on_startup
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def _get_active_presence(self, db_conn):
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"""Fetch non-offline presence from the database so that we can register
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the appropriate time outs.
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"""
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sql = (
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"SELECT user_id, state, last_active_ts, last_federation_update_ts,"
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" last_user_sync_ts, status_msg, currently_active FROM presence_stream"
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" WHERE state != ?"
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)
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sql = self.database_engine.convert_param_style(sql)
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txn = db_conn.cursor()
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txn.execute(sql, (PresenceState.OFFLINE,))
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rows = self.db_pool.cursor_to_dict(txn)
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txn.close()
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for row in rows:
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row["currently_active"] = bool(row["currently_active"])
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return [UserPresenceState(**row) for row in rows]
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async def count_daily_users(self) -> int:
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"""
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Counts the number of users who used this homeserver in the last 24 hours.
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"""
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yesterday = int(self._clock.time_msec()) - (1000 * 60 * 60 * 24)
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return await self.db_pool.runInteraction(
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"count_daily_users", self._count_users, yesterday
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)
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async def count_monthly_users(self) -> int:
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"""
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Counts the number of users who used this homeserver in the last 30 days.
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Note this method is intended for phonehome metrics only and is different
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from the mau figure in synapse.storage.monthly_active_users which,
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amongst other things, includes a 3 day grace period before a user counts.
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"""
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thirty_days_ago = int(self._clock.time_msec()) - (1000 * 60 * 60 * 24 * 30)
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return await self.db_pool.runInteraction(
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"count_monthly_users", self._count_users, thirty_days_ago
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)
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def _count_users(self, txn, time_from):
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"""
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Returns number of users seen in the past time_from period
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"""
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sql = """
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SELECT COALESCE(count(*), 0) FROM (
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SELECT user_id FROM user_ips
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WHERE last_seen > ?
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GROUP BY user_id
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) u
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"""
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txn.execute(sql, (time_from,))
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(count,) = txn.fetchone()
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return count
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async def count_r30_users(self) -> Dict[str, int]:
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"""
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Counts the number of 30 day retained users, defined as:-
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* Users who have created their accounts more than 30 days ago
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* Where last seen at most 30 days ago
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* Where account creation and last_seen are > 30 days apart
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Returns:
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A mapping of counts globally as well as broken out by platform.
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"""
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def _count_r30_users(txn):
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thirty_days_in_secs = 86400 * 30
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now = int(self._clock.time())
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thirty_days_ago_in_secs = now - thirty_days_in_secs
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sql = """
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SELECT platform, COALESCE(count(*), 0) FROM (
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SELECT
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users.name, platform, users.creation_ts * 1000,
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MAX(uip.last_seen)
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FROM users
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INNER JOIN (
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SELECT
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user_id,
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last_seen,
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CASE
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WHEN user_agent LIKE '%%Android%%' THEN 'android'
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WHEN user_agent LIKE '%%iOS%%' THEN 'ios'
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WHEN user_agent LIKE '%%Electron%%' THEN 'electron'
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WHEN user_agent LIKE '%%Mozilla%%' THEN 'web'
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WHEN user_agent LIKE '%%Gecko%%' THEN 'web'
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ELSE 'unknown'
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END
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AS platform
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FROM user_ips
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) uip
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ON users.name = uip.user_id
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AND users.appservice_id is NULL
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AND users.creation_ts < ?
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AND uip.last_seen/1000 > ?
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AND (uip.last_seen/1000) - users.creation_ts > 86400 * 30
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GROUP BY users.name, platform, users.creation_ts
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) u GROUP BY platform
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"""
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results = {}
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txn.execute(sql, (thirty_days_ago_in_secs, thirty_days_ago_in_secs))
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for row in txn:
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if row[0] == "unknown":
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pass
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results[row[0]] = row[1]
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sql = """
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SELECT COALESCE(count(*), 0) FROM (
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SELECT users.name, users.creation_ts * 1000,
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MAX(uip.last_seen)
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FROM users
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INNER JOIN (
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SELECT
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user_id,
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last_seen
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FROM user_ips
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) uip
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ON users.name = uip.user_id
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AND appservice_id is NULL
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AND users.creation_ts < ?
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AND uip.last_seen/1000 > ?
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AND (uip.last_seen/1000) - users.creation_ts > 86400 * 30
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GROUP BY users.name, users.creation_ts
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) u
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"""
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txn.execute(sql, (thirty_days_ago_in_secs, thirty_days_ago_in_secs))
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(count,) = txn.fetchone()
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results["all"] = count
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return results
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return await self.db_pool.runInteraction("count_r30_users", _count_r30_users)
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def _get_start_of_day(self):
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"""
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Returns millisecond unixtime for start of UTC day.
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"""
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now = time.gmtime()
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today_start = calendar.timegm((now.tm_year, now.tm_mon, now.tm_mday, 0, 0, 0))
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return today_start * 1000
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async def generate_user_daily_visits(self) -> None:
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"""
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Generates daily visit data for use in cohort/ retention analysis
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"""
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def _generate_user_daily_visits(txn):
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logger.info("Calling _generate_user_daily_visits")
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today_start = self._get_start_of_day()
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a_day_in_milliseconds = 24 * 60 * 60 * 1000
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now = self.clock.time_msec()
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sql = """
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INSERT INTO user_daily_visits (user_id, device_id, timestamp)
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SELECT u.user_id, u.device_id, ?
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FROM user_ips AS u
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LEFT JOIN (
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SELECT user_id, device_id, timestamp FROM user_daily_visits
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WHERE timestamp = ?
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) udv
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ON u.user_id = udv.user_id AND u.device_id=udv.device_id
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INNER JOIN users ON users.name=u.user_id
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WHERE last_seen > ? AND last_seen <= ?
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AND udv.timestamp IS NULL AND users.is_guest=0
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AND users.appservice_id IS NULL
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GROUP BY u.user_id, u.device_id
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"""
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# This means that the day has rolled over but there could still
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# be entries from the previous day. There is an edge case
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# where if the user logs in at 23:59 and overwrites their
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# last_seen at 00:01 then they will not be counted in the
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# previous day's stats - it is important that the query is run
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# often to minimise this case.
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if today_start > self._last_user_visit_update:
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yesterday_start = today_start - a_day_in_milliseconds
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txn.execute(
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sql,
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(
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yesterday_start,
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yesterday_start,
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self._last_user_visit_update,
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today_start,
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),
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)
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self._last_user_visit_update = today_start
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txn.execute(
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sql, (today_start, today_start, self._last_user_visit_update, now)
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)
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# Update _last_user_visit_update to now. The reason to do this
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# rather just clamping to the beginning of the day is to limit
|
|
# the size of the join - meaning that the query can be run more
|
|
# frequently
|
|
self._last_user_visit_update = now
|
|
|
|
await self.db_pool.runInteraction(
|
|
"generate_user_daily_visits", _generate_user_daily_visits
|
|
)
|
|
|
|
async def get_users(self) -> List[Dict[str, Any]]:
|
|
"""Function to retrieve a list of users in users table.
|
|
|
|
Returns:
|
|
A list of dictionaries representing users.
|
|
"""
|
|
return await self.db_pool.simple_select_list(
|
|
table="users",
|
|
keyvalues={},
|
|
retcols=[
|
|
"name",
|
|
"password_hash",
|
|
"is_guest",
|
|
"admin",
|
|
"user_type",
|
|
"deactivated",
|
|
],
|
|
desc="get_users",
|
|
)
|
|
|
|
async def get_users_paginate(
|
|
self,
|
|
start: int,
|
|
limit: int,
|
|
user_id: Optional[str] = None,
|
|
name: Optional[str] = None,
|
|
guests: bool = True,
|
|
deactivated: bool = False,
|
|
) -> Tuple[List[Dict[str, Any]], int]:
|
|
"""Function to retrieve a paginated list of users from
|
|
users list. This will return a json list of users and the
|
|
total number of users matching the filter criteria.
|
|
|
|
Args:
|
|
start: start number to begin the query from
|
|
limit: number of rows to retrieve
|
|
user_id: search for user_id. ignored if name is not None
|
|
name: search for local part of user_id or display name
|
|
guests: whether to in include guest users
|
|
deactivated: whether to include deactivated users
|
|
Returns:
|
|
A tuple of a list of mappings from user to information and a count of total users.
|
|
"""
|
|
|
|
def get_users_paginate_txn(txn):
|
|
filters = []
|
|
args = [self.hs.config.server_name]
|
|
|
|
if name:
|
|
filters.append("(name LIKE ? OR displayname LIKE ?)")
|
|
args.extend(["@%" + name + "%:%", "%" + name + "%"])
|
|
elif user_id:
|
|
filters.append("name LIKE ?")
|
|
args.extend(["%" + user_id + "%"])
|
|
|
|
if not guests:
|
|
filters.append("is_guest = 0")
|
|
|
|
if not deactivated:
|
|
filters.append("deactivated = 0")
|
|
|
|
where_clause = "WHERE " + " AND ".join(filters) if len(filters) > 0 else ""
|
|
|
|
sql_base = """
|
|
FROM users as u
|
|
LEFT JOIN profiles AS p ON u.name = '@' || p.user_id || ':' || ?
|
|
{}
|
|
""".format(
|
|
where_clause
|
|
)
|
|
sql = "SELECT COUNT(*) as total_users " + sql_base
|
|
txn.execute(sql, args)
|
|
count = txn.fetchone()[0]
|
|
|
|
sql = (
|
|
"SELECT name, user_type, is_guest, admin, deactivated, displayname, avatar_url "
|
|
+ sql_base
|
|
+ " ORDER BY u.name LIMIT ? OFFSET ?"
|
|
)
|
|
args += [limit, start]
|
|
txn.execute(sql, args)
|
|
users = self.db_pool.cursor_to_dict(txn)
|
|
return users, count
|
|
|
|
return await self.db_pool.runInteraction(
|
|
"get_users_paginate_txn", get_users_paginate_txn
|
|
)
|
|
|
|
async def search_users(self, term: str) -> Optional[List[Dict[str, Any]]]:
|
|
"""Function to search users list for one or more users with
|
|
the matched term.
|
|
|
|
Args:
|
|
term: search term
|
|
|
|
Returns:
|
|
A list of dictionaries or None.
|
|
"""
|
|
return await self.db_pool.simple_search_list(
|
|
table="users",
|
|
term=term,
|
|
col="name",
|
|
retcols=["name", "password_hash", "is_guest", "admin", "user_type"],
|
|
desc="search_users",
|
|
)
|
|
|
|
|
|
def check_database_before_upgrade(cur, database_engine, config: HomeServerConfig):
|
|
"""Called before upgrading an existing database to check that it is broadly sane
|
|
compared with the configuration.
|
|
"""
|
|
logger.info("Checking database for consistency with configuration...")
|
|
|
|
# if there are any users in the database, check that the username matches our
|
|
# configured server name.
|
|
|
|
cur.execute("SELECT name FROM users LIMIT 1")
|
|
rows = cur.fetchall()
|
|
if not rows:
|
|
return
|
|
|
|
user_domain = get_domain_from_id(rows[0][0])
|
|
if user_domain == config.server_name:
|
|
return
|
|
|
|
raise Exception(
|
|
"Found users in database not native to %s!\n"
|
|
"You cannot change a synapse server_name after it's been configured"
|
|
% (config.server_name,)
|
|
)
|
|
|
|
|
|
__all__ = ["DataStore", "check_database_before_upgrade"]
|