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Code Issues Releases Wiki Activity

Move some replication processing out of generic_worker (#9796) 

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
pull/9827/head
Erik Johnston 2021-04-14 17:06:06 +01:00 committed by GitHub
parent c9a2b5d402
commit 00a6db9676
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6 changed files with 486 additions and 483 deletions
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changelog.d/9796.misc Normal file
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@ -0,0 +1 @@
Move some replication processing out of `generic_worker`.

470
synapse/app/generic_worker.py
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@ -13,12 +13,9 @@
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and # See the License for the specific language governing permissions and
# limitations under the License. # limitations under the License.
import contextlib
import logging import logging
import sys import sys
from typing import Dict, Iterable, Optional, Set from typing import Dict, Iterable, Optional
from typing_extensions import ContextManager
from twisted.internet import address from twisted.internet import address
from twisted.web.resource import IResource from twisted.web.resource import IResource
@ -40,24 +37,13 @@ from synapse.config._base import ConfigError
from synapse.config.homeserver import HomeServerConfig from synapse.config.homeserver import HomeServerConfig
from synapse.config.logger import setup_logging from synapse.config.logger import setup_logging
from synapse.config.server import ListenerConfig from synapse.config.server import ListenerConfig
from synapse.federation import send_queue
from synapse.federation.transport.server import TransportLayerServer from synapse.federation.transport.server import TransportLayerServer
from synapse.handlers.presence import (
BasePresenceHandler,
PresenceState,
get_interested_parties,
)
from synapse.http.server import JsonResource, OptionsResource from synapse.http.server import JsonResource, OptionsResource
from synapse.http.servlet import RestServlet, parse_json_object_from_request from synapse.http.servlet import RestServlet, parse_json_object_from_request
from synapse.http.site import SynapseSite from synapse.http.site import SynapseSite
from synapse.logging.context import LoggingContext from synapse.logging.context import LoggingContext
from synapse.metrics import METRICS_PREFIX, MetricsResource, RegistryProxy from synapse.metrics import METRICS_PREFIX, MetricsResource, RegistryProxy
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.replication.http import REPLICATION_PREFIX, ReplicationRestResource from synapse.replication.http import REPLICATION_PREFIX, ReplicationRestResource
from synapse.replication.http.presence import (
ReplicationBumpPresenceActiveTime,
ReplicationPresenceSetState,
)
from synapse.replication.slave.storage._base import BaseSlavedStore from synapse.replication.slave.storage._base import BaseSlavedStore
from synapse.replication.slave.storage.account_data import SlavedAccountDataStore from synapse.replication.slave.storage.account_data import SlavedAccountDataStore
from synapse.replication.slave.storage.appservice import SlavedApplicationServiceStore from synapse.replication.slave.storage.appservice import SlavedApplicationServiceStore
@ -77,19 +63,6 @@ from synapse.replication.slave.storage.receipts import SlavedReceiptsStore
from synapse.replication.slave.storage.registration import SlavedRegistrationStore from synapse.replication.slave.storage.registration import SlavedRegistrationStore
from synapse.replication.slave.storage.room import RoomStore from synapse.replication.slave.storage.room import RoomStore
from synapse.replication.slave.storage.transactions import SlavedTransactionStore from synapse.replication.slave.storage.transactions import SlavedTransactionStore
from synapse.replication.tcp.client import ReplicationDataHandler
from synapse.replication.tcp.commands import ClearUserSyncsCommand
from synapse.replication.tcp.streams import (
AccountDataStream,
DeviceListsStream,
GroupServerStream,
PresenceStream,
PushersStream,
PushRulesStream,
ReceiptsStream,
TagAccountDataStream,
ToDeviceStream,
)
from synapse.rest.admin import register_servlets_for_media_repo from synapse.rest.admin import register_servlets_for_media_repo
from synapse.rest.client.v1 import events, login, room from synapse.rest.client.v1 import events, login, room
from synapse.rest.client.v1.initial_sync import InitialSyncRestServlet from synapse.rest.client.v1.initial_sync import InitialSyncRestServlet
@ -128,7 +101,7 @@ from synapse.rest.client.versions import VersionsRestServlet
from synapse.rest.health import HealthResource from synapse.rest.health import HealthResource
from synapse.rest.key.v2 import KeyApiV2Resource from synapse.rest.key.v2 import KeyApiV2Resource
from synapse.rest.synapse.client import build_synapse_client_resource_tree from synapse.rest.synapse.client import build_synapse_client_resource_tree
from synapse.server import HomeServer, cache_in_self from synapse.server import HomeServer
from synapse.storage.databases.main.censor_events import CensorEventsStore from synapse.storage.databases.main.censor_events import CensorEventsStore
from synapse.storage.databases.main.client_ips import ClientIpWorkerStore from synapse.storage.databases.main.client_ips import ClientIpWorkerStore
from synapse.storage.databases.main.e2e_room_keys import EndToEndRoomKeyStore from synapse.storage.databases.main.e2e_room_keys import EndToEndRoomKeyStore
@ -137,14 +110,11 @@ from synapse.storage.databases.main.metrics import ServerMetricsStore
from synapse.storage.databases.main.monthly_active_users import ( from synapse.storage.databases.main.monthly_active_users import (
MonthlyActiveUsersWorkerStore, MonthlyActiveUsersWorkerStore,
) )
from synapse.storage.databases.main.presence import UserPresenceState
from synapse.storage.databases.main.search import SearchWorkerStore from synapse.storage.databases.main.search import SearchWorkerStore
from synapse.storage.databases.main.stats import StatsStore from synapse.storage.databases.main.stats import StatsStore
from synapse.storage.databases.main.transactions import TransactionWorkerStore from synapse.storage.databases.main.transactions import TransactionWorkerStore
from synapse.storage.databases.main.ui_auth import UIAuthWorkerStore from synapse.storage.databases.main.ui_auth import UIAuthWorkerStore
from synapse.storage.databases.main.user_directory import UserDirectoryStore from synapse.storage.databases.main.user_directory import UserDirectoryStore
from synapse.types import ReadReceipt
from synapse.util.async_helpers import Linearizer
from synapse.util.httpresourcetree import create_resource_tree from synapse.util.httpresourcetree import create_resource_tree
from synapse.util.versionstring import get_version_string from synapse.util.versionstring import get_version_string
@ -264,214 +234,6 @@ class KeyUploadServlet(RestServlet):
return 200, {"one_time_key_counts": result} return 200, {"one_time_key_counts": result}
class _NullContextManager(ContextManager[None]):
"""A context manager which does nothing."""
def __exit__(self, exc_type, exc_val, exc_tb):
pass
UPDATE_SYNCING_USERS_MS = 10 * 1000
class GenericWorkerPresence(BasePresenceHandler):
def __init__(self, hs):
super().__init__(hs)
self.hs = hs
self.is_mine_id = hs.is_mine_id
self.presence_router = hs.get_presence_router()
self._presence_enabled = hs.config.use_presence
# The number of ongoing syncs on this process, by user id.
# Empty if _presence_enabled is false.
self._user_to_num_current_syncs = {} # type: Dict[str, int]
self.notifier = hs.get_notifier()
self.instance_id = hs.get_instance_id()
# user_id -> last_sync_ms. Lists the users that have stopped syncing
# but we haven't notified the master of that yet
self.users_going_offline = {}
self._bump_active_client = ReplicationBumpPresenceActiveTime.make_client(hs)
self._set_state_client = ReplicationPresenceSetState.make_client(hs)
self._send_stop_syncing_loop = self.clock.looping_call(
self.send_stop_syncing, UPDATE_SYNCING_USERS_MS
)
self._busy_presence_enabled = hs.config.experimental.msc3026_enabled
hs.get_reactor().addSystemEventTrigger(
"before",
"shutdown",
run_as_background_process,
"generic_presence.on_shutdown",
self._on_shutdown,
)
def _on_shutdown(self):
if self._presence_enabled:
self.hs.get_tcp_replication().send_command(
ClearUserSyncsCommand(self.instance_id)
)
def send_user_sync(self, user_id, is_syncing, last_sync_ms):
if self._presence_enabled:
self.hs.get_tcp_replication().send_user_sync(
self.instance_id, user_id, is_syncing, last_sync_ms
)
def mark_as_coming_online(self, user_id):
"""A user has started syncing. Send a UserSync to the master, unless they
had recently stopped syncing.
Args:
user_id (str)
"""
going_offline = self.users_going_offline.pop(user_id, None)
if not going_offline:
# Safe to skip because we haven't yet told the master they were offline
self.send_user_sync(user_id, True, self.clock.time_msec())
def mark_as_going_offline(self, user_id):
"""A user has stopped syncing. We wait before notifying the master as
its likely they'll come back soon. This allows us to avoid sending
a stopped syncing immediately followed by a started syncing notification
to the master
Args:
user_id (str)
"""
self.users_going_offline[user_id] = self.clock.time_msec()
def send_stop_syncing(self):
"""Check if there are any users who have stopped syncing a while ago
and haven't come back yet. If there are poke the master about them.
"""
now = self.clock.time_msec()
for user_id, last_sync_ms in list(self.users_going_offline.items()):
if now - last_sync_ms > UPDATE_SYNCING_USERS_MS:
self.users_going_offline.pop(user_id, None)
self.send_user_sync(user_id, False, last_sync_ms)
async def user_syncing(
self, user_id: str, affect_presence: bool
) -> ContextManager[None]:
"""Record that a user is syncing.
Called by the sync and events servlets to record that a user has connected to
this worker and is waiting for some events.
"""
if not affect_presence or not self._presence_enabled:
return _NullContextManager()
curr_sync = self._user_to_num_current_syncs.get(user_id, 0)
self._user_to_num_current_syncs[user_id] = curr_sync + 1
# If we went from no in flight sync to some, notify replication
if self._user_to_num_current_syncs[user_id] == 1:
self.mark_as_coming_online(user_id)
def _end():
# We check that the user_id is in user_to_num_current_syncs because
# user_to_num_current_syncs may have been cleared if we are
# shutting down.
if user_id in self._user_to_num_current_syncs:
self._user_to_num_current_syncs[user_id] -= 1
# If we went from one in flight sync to non, notify replication
if self._user_to_num_current_syncs[user_id] == 0:
self.mark_as_going_offline(user_id)
@contextlib.contextmanager
def _user_syncing():
try:
yield
finally:
_end()
return _user_syncing()
async def notify_from_replication(self, states, stream_id):
parties = await get_interested_parties(self.store, self.presence_router, states)
room_ids_to_states, users_to_states = parties
self.notifier.on_new_event(
"presence_key",
stream_id,
rooms=room_ids_to_states.keys(),
users=users_to_states.keys(),
)
async def process_replication_rows(self, token, rows):
states = [
UserPresenceState(
row.user_id,
row.state,
row.last_active_ts,
row.last_federation_update_ts,
row.last_user_sync_ts,
row.status_msg,
row.currently_active,
)
for row in rows
]
for state in states:
self.user_to_current_state[state.user_id] = state
stream_id = token
await self.notify_from_replication(states, stream_id)
def get_currently_syncing_users_for_replication(self) -> Iterable[str]:
return [
user_id
for user_id, count in self._user_to_num_current_syncs.items()
if count > 0
]
async def set_state(self, target_user, state, ignore_status_msg=False):
"""Set the presence state of the user."""
presence = state["presence"]
valid_presence = (
PresenceState.ONLINE,
PresenceState.UNAVAILABLE,
PresenceState.OFFLINE,
PresenceState.BUSY,
)
if presence not in valid_presence or (
presence == PresenceState.BUSY and not self._busy_presence_enabled
):
raise SynapseError(400, "Invalid presence state")
user_id = target_user.to_string()
# If presence is disabled, no-op
if not self.hs.config.use_presence:
return
# Proxy request to master
await self._set_state_client(
user_id=user_id, state=state, ignore_status_msg=ignore_status_msg
)
async def bump_presence_active_time(self, user):
"""We've seen the user do something that indicates they're interacting
with the app.
"""
# If presence is disabled, no-op
if not self.hs.config.use_presence:
return
# Proxy request to master
user_id = user.to_string()
await self._bump_active_client(user_id=user_id)
class GenericWorkerSlavedStore( class GenericWorkerSlavedStore(
# FIXME(#3714): We need to add UserDirectoryStore as we write directly # FIXME(#3714): We need to add UserDirectoryStore as we write directly
# rather than going via the correct worker. # rather than going via the correct worker.
@ -657,234 +419,6 @@ class GenericWorkerServer(HomeServer):
self.get_tcp_replication().start_replication(self) self.get_tcp_replication().start_replication(self)
@cache_in_self
def get_replication_data_handler(self):
return GenericWorkerReplicationHandler(self)
@cache_in_self
def get_presence_handler(self):
return GenericWorkerPresence(self)
class GenericWorkerReplicationHandler(ReplicationDataHandler):
def __init__(self, hs):
super().__init__(hs)
self.store = hs.get_datastore()
self.presence_handler = hs.get_presence_handler() # type: GenericWorkerPresence
self.notifier = hs.get_notifier()
self.notify_pushers = hs.config.start_pushers
self.pusher_pool = hs.get_pusherpool()
self.send_handler = None # type: Optional[FederationSenderHandler]
if hs.config.send_federation:
self.send_handler = FederationSenderHandler(hs)
async def on_rdata(self, stream_name, instance_name, token, rows):
await super().on_rdata(stream_name, instance_name, token, rows)
await self._process_and_notify(stream_name, instance_name, token, rows)
async def _process_and_notify(self, stream_name, instance_name, token, rows):
try:
if self.send_handler:
await self.send_handler.process_replication_rows(
stream_name, token, rows
)
if stream_name == PushRulesStream.NAME:
self.notifier.on_new_event(
"push_rules_key", token, users=[row.user_id for row in rows]
)
elif stream_name in (AccountDataStream.NAME, TagAccountDataStream.NAME):
self.notifier.on_new_event(
"account_data_key", token, users=[row.user_id for row in rows]
)
elif stream_name == ReceiptsStream.NAME:
self.notifier.on_new_event(
"receipt_key", token, rooms=[row.room_id for row in rows]
)
await self.pusher_pool.on_new_receipts(
token, token, {row.room_id for row in rows}
)
elif stream_name == ToDeviceStream.NAME:
entities = [row.entity for row in rows if row.entity.startswith("@")]
if entities:
self.notifier.on_new_event("to_device_key", token, users=entities)
elif stream_name == DeviceListsStream.NAME:
all_room_ids = set() # type: Set[str]
for row in rows:
if row.entity.startswith("@"):
room_ids = await self.store.get_rooms_for_user(row.entity)
all_room_ids.update(room_ids)
self.notifier.on_new_event("device_list_key", token, rooms=all_room_ids)
elif stream_name == PresenceStream.NAME:
await self.presence_handler.process_replication_rows(token, rows)
elif stream_name == GroupServerStream.NAME:
self.notifier.on_new_event(
"groups_key", token, users=[row.user_id for row in rows]
)
elif stream_name == PushersStream.NAME:
for row in rows:
if row.deleted:
self.stop_pusher(row.user_id, row.app_id, row.pushkey)
else:
await self.start_pusher(row.user_id, row.app_id, row.pushkey)
except Exception:
logger.exception("Error processing replication")
async def on_position(self, stream_name: str, instance_name: str, token: int):
await super().on_position(stream_name, instance_name, token)
# Also call on_rdata to ensure that stream positions are properly reset.
await self.on_rdata(stream_name, instance_name, token, [])
def stop_pusher(self, user_id, app_id, pushkey):
if not self.notify_pushers:
return
key = "%s:%s" % (app_id, pushkey)
pushers_for_user = self.pusher_pool.pushers.get(user_id, {})
pusher = pushers_for_user.pop(key, None)
if pusher is None:
return
logger.info("Stopping pusher %r / %r", user_id, key)
pusher.on_stop()
async def start_pusher(self, user_id, app_id, pushkey):
if not self.notify_pushers:
return
key = "%s:%s" % (app_id, pushkey)
logger.info("Starting pusher %r / %r", user_id, key)
return await self.pusher_pool.start_pusher_by_id(app_id, pushkey, user_id)
def on_remote_server_up(self, server: str):
"""Called when get a new REMOTE_SERVER_UP command."""
# Let's wake up the transaction queue for the server in case we have
# pending stuff to send to it.
if self.send_handler:
self.send_handler.wake_destination(server)
class FederationSenderHandler:
"""Processes the fedration replication stream
This class is only instantiate on the worker responsible for sending outbound
federation transactions. It receives rows from the replication stream and forwards
the appropriate entries to the FederationSender class.
"""
def __init__(self, hs: GenericWorkerServer):
self.store = hs.get_datastore()
self._is_mine_id = hs.is_mine_id
self.federation_sender = hs.get_federation_sender()
self._hs = hs
# Stores the latest position in the federation stream we've gotten up
# to. This is always set before we use it.
self.federation_position = None
self._fed_position_linearizer = Linearizer(name="_fed_position_linearizer")
def wake_destination(self, server: str):
self.federation_sender.wake_destination(server)
async def process_replication_rows(self, stream_name, token, rows):
# The federation stream contains things that we want to send out, e.g.
# presence, typing, etc.
if stream_name == "federation":
send_queue.process_rows_for_federation(self.federation_sender, rows)
await self.update_token(token)
# ... and when new receipts happen
elif stream_name == ReceiptsStream.NAME:
await self._on_new_receipts(rows)
# ... as well as device updates and messages
elif stream_name == DeviceListsStream.NAME:
# The entities are either user IDs (starting with '@') whose devices
# have changed, or remote servers that we need to tell about
# changes.
hosts = {row.entity for row in rows if not row.entity.startswith("@")}
for host in hosts:
self.federation_sender.send_device_messages(host)
elif stream_name == ToDeviceStream.NAME:
# The to_device stream includes stuff to be pushed to both local
# clients and remote servers, so we ignore entities that start with
# '@' (since they'll be local users rather than destinations).
hosts = {row.entity for row in rows if not row.entity.startswith("@")}
for host in hosts:
self.federation_sender.send_device_messages(host)
async def _on_new_receipts(self, rows):
"""
Args:
rows (Iterable[synapse.replication.tcp.streams.ReceiptsStream.ReceiptsStreamRow]):
new receipts to be processed
"""
for receipt in rows:
# we only want to send on receipts for our own users
if not self._is_mine_id(receipt.user_id):
continue
receipt_info = ReadReceipt(
receipt.room_id,
receipt.receipt_type,
receipt.user_id,
[receipt.event_id],
receipt.data,
)
await self.federation_sender.send_read_receipt(receipt_info)
async def update_token(self, token):
"""Update the record of where we have processed to in the federation stream.
Called after we have processed a an update received over replication. Sends
a FEDERATION_ACK back to the master, and stores the token that we have processed
in `federation_stream_position` so that we can restart where we left off.
"""
self.federation_position = token
# We save and send the ACK to master asynchronously, so we don't block
# processing on persistence. We don't need to do this operation for
# every single RDATA we receive, we just need to do it periodically.
if self._fed_position_linearizer.is_queued(None):
# There is already a task queued up to save and send the token, so
# no need to queue up another task.
return
run_as_background_process("_save_and_send_ack", self._save_and_send_ack)
async def _save_and_send_ack(self):
"""Save the current federation position in the database and send an ACK
to master with where we're up to.
"""
try:
# We linearize here to ensure we don't have races updating the token
#
# XXX this appears to be redundant, since the ReplicationCommandHandler
# has a linearizer which ensures that we only process one line of
# replication data at a time. Should we remove it, or is it doing useful
# service for robustness? Or could we replace it with an assertion that
# we're not being re-entered?
with (await self._fed_position_linearizer.queue(None)):
# We persist and ack the same position, so we take a copy of it
# here as otherwise it can get modified from underneath us.
current_position = self.federation_position
await self.store.update_federation_out_pos(
"federation", current_position
)
# We ACK this token over replication so that the master can drop
# its in memory queues
self._hs.get_tcp_replication().send_federation_ack(current_position)
except Exception:
logger.exception("Error updating federation stream position")
def start(config_options): def start(config_options):
try: try:

246
synapse/handlers/presence.py
View File

@ -22,6 +22,7 @@ The methods that define policy are:
- should_notify - should_notify
""" """
import abc import abc
import contextlib
import logging import logging
from contextlib import contextmanager from contextlib import contextmanager
from typing import ( from typing import (
@ -48,6 +49,11 @@ from synapse.logging.context import run_in_background
from synapse.logging.utils import log_function from synapse.logging.utils import log_function
from synapse.metrics import LaterGauge from synapse.metrics import LaterGauge
from synapse.metrics.background_process_metrics import run_as_background_process from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.replication.http.presence import (
ReplicationBumpPresenceActiveTime,
ReplicationPresenceSetState,
)
from synapse.replication.tcp.commands import ClearUserSyncsCommand
from synapse.state import StateHandler from synapse.state import StateHandler
from synapse.storage.databases.main import DataStore from synapse.storage.databases.main import DataStore
from synapse.types import Collection, JsonDict, UserID, get_domain_from_id from synapse.types import Collection, JsonDict, UserID, get_domain_from_id
@ -104,6 +110,10 @@ FEDERATION_PING_INTERVAL = 25 * 60 * 1000
# are dead. # are dead.
EXTERNAL_PROCESS_EXPIRY = 5 * 60 * 1000 EXTERNAL_PROCESS_EXPIRY = 5 * 60 * 1000
# Delay before a worker tells the presence handler that a user has stopped
# syncing.
UPDATE_SYNCING_USERS_MS = 10 * 1000
assert LAST_ACTIVE_GRANULARITY < IDLE_TIMER assert LAST_ACTIVE_GRANULARITY < IDLE_TIMER
@ -208,6 +218,242 @@ class BasePresenceHandler(abc.ABC):
with the app. with the app.
""" """
async def update_external_syncs_row(
self, process_id, user_id, is_syncing, sync_time_msec
):
"""Update the syncing users for an external process as a delta.
This is a no-op when presence is handled by a different worker.
Args:
process_id (str): An identifier for the process the users are
syncing against. This allows synapse to process updates
as user start and stop syncing against a given process.
user_id (str): The user who has started or stopped syncing
is_syncing (bool): Whether or not the user is now syncing
sync_time_msec(int): Time in ms when the user was last syncing
"""
pass
async def update_external_syncs_clear(self, process_id):
"""Marks all users that had been marked as syncing by a given process
as offline.
Used when the process has stopped/disappeared.
This is a no-op when presence is handled by a different worker.
"""
pass
async def process_replication_rows(self, token, rows):
"""Process presence stream rows received over replication."""
pass
class _NullContextManager(ContextManager[None]):
"""A context manager which does nothing."""
def __exit__(self, exc_type, exc_val, exc_tb):
pass
class WorkerPresenceHandler(BasePresenceHandler):
def __init__(self, hs):
super().__init__(hs)
self.hs = hs
self.is_mine_id = hs.is_mine_id
self.presence_router = hs.get_presence_router()
self._presence_enabled = hs.config.use_presence
# The number of ongoing syncs on this process, by user id.
# Empty if _presence_enabled is false.
self._user_to_num_current_syncs = {} # type: Dict[str, int]
self.notifier = hs.get_notifier()
self.instance_id = hs.get_instance_id()
# user_id -> last_sync_ms. Lists the users that have stopped syncing
# but we haven't notified the master of that yet
self.users_going_offline = {}
self._bump_active_client = ReplicationBumpPresenceActiveTime.make_client(hs)
self._set_state_client = ReplicationPresenceSetState.make_client(hs)
self._send_stop_syncing_loop = self.clock.looping_call(
self.send_stop_syncing, UPDATE_SYNCING_USERS_MS
)
self._busy_presence_enabled = hs.config.experimental.msc3026_enabled
hs.get_reactor().addSystemEventTrigger(
"before",
"shutdown",
run_as_background_process,
"generic_presence.on_shutdown",
self._on_shutdown,
)
def _on_shutdown(self):
if self._presence_enabled:
self.hs.get_tcp_replication().send_command(
ClearUserSyncsCommand(self.instance_id)
)
def send_user_sync(self, user_id, is_syncing, last_sync_ms):
if self._presence_enabled:
self.hs.get_tcp_replication().send_user_sync(
self.instance_id, user_id, is_syncing, last_sync_ms
)
def mark_as_coming_online(self, user_id):
"""A user has started syncing. Send a UserSync to the master, unless they
had recently stopped syncing.
Args:
user_id (str)
"""
going_offline = self.users_going_offline.pop(user_id, None)
if not going_offline:
# Safe to skip because we haven't yet told the master they were offline
self.send_user_sync(user_id, True, self.clock.time_msec())
def mark_as_going_offline(self, user_id):
"""A user has stopped syncing. We wait before notifying the master as
its likely they'll come back soon. This allows us to avoid sending
a stopped syncing immediately followed by a started syncing notification
to the master
Args:
user_id (str)
"""
self.users_going_offline[user_id] = self.clock.time_msec()
def send_stop_syncing(self):
"""Check if there are any users who have stopped syncing a while ago
and haven't come back yet. If there are poke the master about them.
"""
now = self.clock.time_msec()
for user_id, last_sync_ms in list(self.users_going_offline.items()):
if now - last_sync_ms > UPDATE_SYNCING_USERS_MS:
self.users_going_offline.pop(user_id, None)
self.send_user_sync(user_id, False, last_sync_ms)
async def user_syncing(
self, user_id: str, affect_presence: bool
) -> ContextManager[None]:
"""Record that a user is syncing.
Called by the sync and events servlets to record that a user has connected to
this worker and is waiting for some events.
"""
if not affect_presence or not self._presence_enabled:
return _NullContextManager()
curr_sync = self._user_to_num_current_syncs.get(user_id, 0)
self._user_to_num_current_syncs[user_id] = curr_sync + 1
# If we went from no in flight sync to some, notify replication
if self._user_to_num_current_syncs[user_id] == 1:
self.mark_as_coming_online(user_id)
def _end():
# We check that the user_id is in user_to_num_current_syncs because
# user_to_num_current_syncs may have been cleared if we are
# shutting down.
if user_id in self._user_to_num_current_syncs:
self._user_to_num_current_syncs[user_id] -= 1
# If we went from one in flight sync to non, notify replication
if self._user_to_num_current_syncs[user_id] == 0:
self.mark_as_going_offline(user_id)
@contextlib.contextmanager
def _user_syncing():
try:
yield
finally:
_end()
return _user_syncing()
async def notify_from_replication(self, states, stream_id):
parties = await get_interested_parties(self.store, self.presence_router, states)
room_ids_to_states, users_to_states = parties
self.notifier.on_new_event(
"presence_key",
stream_id,
rooms=room_ids_to_states.keys(),
users=users_to_states.keys(),
)
async def process_replication_rows(self, token, rows):
states = [
UserPresenceState(
row.user_id,
row.state,
row.last_active_ts,
row.last_federation_update_ts,
row.last_user_sync_ts,
row.status_msg,
row.currently_active,
)
for row in rows
]
for state in states:
self.user_to_current_state[state.user_id] = state
stream_id = token
await self.notify_from_replication(states, stream_id)
def get_currently_syncing_users_for_replication(self) -> Iterable[str]:
return [
user_id
for user_id, count in self._user_to_num_current_syncs.items()
if count > 0
]
async def set_state(self, target_user, state, ignore_status_msg=False):
"""Set the presence state of the user."""
presence = state["presence"]
valid_presence = (
PresenceState.ONLINE,
PresenceState.UNAVAILABLE,
PresenceState.OFFLINE,
PresenceState.BUSY,
)
if presence not in valid_presence or (
presence == PresenceState.BUSY and not self._busy_presence_enabled
):
raise SynapseError(400, "Invalid presence state")
user_id = target_user.to_string()
# If presence is disabled, no-op
if not self.hs.config.use_presence:
return
# Proxy request to master
await self._set_state_client(
user_id=user_id, state=state, ignore_status_msg=ignore_status_msg
)
async def bump_presence_active_time(self, user):
"""We've seen the user do something that indicates they're interacting
with the app.
"""
# If presence is disabled, no-op
if not self.hs.config.use_presence:
return
# Proxy request to master
user_id = user.to_string()
await self._bump_active_client(user_id=user_id)
class PresenceHandler(BasePresenceHandler): class PresenceHandler(BasePresenceHandler):
def __init__(self, hs: "HomeServer"): def __init__(self, hs: "HomeServer"):

231
synapse/replication/tcp/client.py
View File

@ -14,22 +14,36 @@
"""A replication client for use by synapse workers. """A replication client for use by synapse workers.
""" """
import logging import logging
from typing import TYPE_CHECKING, Dict, List, Tuple from typing import TYPE_CHECKING, Dict, List, Optional, Set, Tuple
from twisted.internet.defer import Deferred from twisted.internet.defer import Deferred
from twisted.internet.protocol import ReconnectingClientFactory from twisted.internet.protocol import ReconnectingClientFactory
from synapse.api.constants import EventTypes from synapse.api.constants import EventTypes
from synapse.federation import send_queue
from synapse.federation.sender import FederationSender
from synapse.logging.context import PreserveLoggingContext, make_deferred_yieldable from synapse.logging.context import PreserveLoggingContext, make_deferred_yieldable
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol
from synapse.replication.tcp.streams import TypingStream from synapse.replication.tcp.streams import (
AccountDataStream,
DeviceListsStream,
GroupServerStream,
PresenceStream,
PushersStream,
PushRulesStream,
ReceiptsStream,
TagAccountDataStream,
ToDeviceStream,
TypingStream,
)
from synapse.replication.tcp.streams.events import ( from synapse.replication.tcp.streams.events import (
EventsStream, EventsStream,
EventsStreamEventRow, EventsStreamEventRow,
EventsStreamRow, EventsStreamRow,
) )
from synapse.types import PersistedEventPosition, UserID from synapse.types import PersistedEventPosition, ReadReceipt, UserID
from synapse.util.async_helpers import timeout_deferred from synapse.util.async_helpers import Linearizer, timeout_deferred
from synapse.util.metrics import Measure from synapse.util.metrics import Measure
if TYPE_CHECKING: if TYPE_CHECKING:
@ -105,6 +119,14 @@ class ReplicationDataHandler:
self._instance_name = hs.get_instance_name() self._instance_name = hs.get_instance_name()
self._typing_handler = hs.get_typing_handler() self._typing_handler = hs.get_typing_handler()
self._notify_pushers = hs.config.start_pushers
self._pusher_pool = hs.get_pusherpool()
self._presence_handler = hs.get_presence_handler()
self.send_handler = None # type: Optional[FederationSenderHandler]
if hs.should_send_federation():
self.send_handler = FederationSenderHandler(hs)
# Map from stream to list of deferreds waiting for the stream to # Map from stream to list of deferreds waiting for the stream to
# arrive at a particular position. The lists are sorted by stream position. # arrive at a particular position. The lists are sorted by stream position.
self._streams_to_waiters = {} # type: Dict[str, List[Tuple[int, Deferred]]] self._streams_to_waiters = {} # type: Dict[str, List[Tuple[int, Deferred]]]
@ -125,13 +147,53 @@ class ReplicationDataHandler:
""" """
self.store.process_replication_rows(stream_name, instance_name, token, rows) self.store.process_replication_rows(stream_name, instance_name, token, rows)
if self.send_handler:
await self.send_handler.process_replication_rows(stream_name, token, rows)
if stream_name == TypingStream.NAME: if stream_name == TypingStream.NAME:
self._typing_handler.process_replication_rows(token, rows) self._typing_handler.process_replication_rows(token, rows)
self.notifier.on_new_event( self.notifier.on_new_event(
"typing_key", token, rooms=[row.room_id for row in rows] "typing_key", token, rooms=[row.room_id for row in rows]
) )
elif stream_name == PushRulesStream.NAME:
if stream_name == EventsStream.NAME: self.notifier.on_new_event(
"push_rules_key", token, users=[row.user_id for row in rows]
)
elif stream_name in (AccountDataStream.NAME, TagAccountDataStream.NAME):
self.notifier.on_new_event(
"account_data_key", token, users=[row.user_id for row in rows]
)
elif stream_name == ReceiptsStream.NAME:
self.notifier.on_new_event(
"receipt_key", token, rooms=[row.room_id for row in rows]
)
await self._pusher_pool.on_new_receipts(
token, token, {row.room_id for row in rows}
)
elif stream_name == ToDeviceStream.NAME:
entities = [row.entity for row in rows if row.entity.startswith("@")]
if entities:
self.notifier.on_new_event("to_device_key", token, users=entities)
elif stream_name == DeviceListsStream.NAME:
all_room_ids = set() # type: Set[str]
for row in rows:
if row.entity.startswith("@"):
room_ids = await self.store.get_rooms_for_user(row.entity)
all_room_ids.update(room_ids)
self.notifier.on_new_event("device_list_key", token, rooms=all_room_ids)
elif stream_name == GroupServerStream.NAME:
self.notifier.on_new_event(
"groups_key", token, users=[row.user_id for row in rows]
)
elif stream_name == PushersStream.NAME:
for row in rows:
if row.deleted:
self.stop_pusher(row.user_id, row.app_id, row.pushkey)
else:
await self.start_pusher(row.user_id, row.app_id, row.pushkey)
elif stream_name == PresenceStream.NAME:
await self._presence_handler.process_replication_rows(token, rows)
elif stream_name == EventsStream.NAME:
# We shouldn't get multiple rows per token for events stream, so # We shouldn't get multiple rows per token for events stream, so
# we don't need to optimise this for multiple rows. # we don't need to optimise this for multiple rows.
for row in rows: for row in rows:
@ -190,7 +252,7 @@ class ReplicationDataHandler:
waiting_list[:] = waiting_list[index_of_first_deferred_not_called:] waiting_list[:] = waiting_list[index_of_first_deferred_not_called:]
async def on_position(self, stream_name: str, instance_name: str, token: int): async def on_position(self, stream_name: str, instance_name: str, token: int):
self.store.process_replication_rows(stream_name, instance_name, token, []) await self.on_rdata(stream_name, instance_name, token, [])
# We poke the generic "replication" notifier to wake anything up that # We poke the generic "replication" notifier to wake anything up that
# may be streaming. # may be streaming.
@ -199,6 +261,11 @@ class ReplicationDataHandler:
def on_remote_server_up(self, server: str): def on_remote_server_up(self, server: str):
"""Called when get a new REMOTE_SERVER_UP command.""" """Called when get a new REMOTE_SERVER_UP command."""
# Let's wake up the transaction queue for the server in case we have
# pending stuff to send to it.
if self.send_handler:
self.send_handler.wake_destination(server)
async def wait_for_stream_position( async def wait_for_stream_position(
self, instance_name: str, stream_name: str, position: int self, instance_name: str, stream_name: str, position: int
): ):
@ -235,3 +302,153 @@ class ReplicationDataHandler:
logger.info( logger.info(
"Finished waiting for repl stream %r to reach %s", stream_name, position "Finished waiting for repl stream %r to reach %s", stream_name, position
) )
def stop_pusher(self, user_id, app_id, pushkey):
if not self._notify_pushers:
return
key = "%s:%s" % (app_id, pushkey)
pushers_for_user = self._pusher_pool.pushers.get(user_id, {})
pusher = pushers_for_user.pop(key, None)
if pusher is None:
return
logger.info("Stopping pusher %r / %r", user_id, key)
pusher.on_stop()
async def start_pusher(self, user_id, app_id, pushkey):
if not self._notify_pushers:
return
key = "%s:%s" % (app_id, pushkey)
logger.info("Starting pusher %r / %r", user_id, key)
return await self._pusher_pool.start_pusher_by_id(app_id, pushkey, user_id)
class FederationSenderHandler:
"""Processes the fedration replication stream
This class is only instantiate on the worker responsible for sending outbound
federation transactions. It receives rows from the replication stream and forwards
the appropriate entries to the FederationSender class.
"""
def __init__(self, hs: "HomeServer"):
assert hs.should_send_federation()
self.store = hs.get_datastore()
self._is_mine_id = hs.is_mine_id
self._hs = hs
# We need to make a temporary value to ensure that mypy picks up the
# right type. We know we should have a federation sender instance since
# `should_send_federation` is True.
sender = hs.get_federation_sender()
assert isinstance(sender, FederationSender)
self.federation_sender = sender
# Stores the latest position in the federation stream we've gotten up
# to. This is always set before we use it.
self.federation_position = None # type: Optional[int]
self._fed_position_linearizer = Linearizer(name="_fed_position_linearizer")
def wake_destination(self, server: str):
self.federation_sender.wake_destination(server)
async def process_replication_rows(self, stream_name, token, rows):
# The federation stream contains things that we want to send out, e.g.
# presence, typing, etc.
if stream_name == "federation":
send_queue.process_rows_for_federation(self.federation_sender, rows)
await self.update_token(token)
# ... and when new receipts happen
elif stream_name == ReceiptsStream.NAME:
await self._on_new_receipts(rows)
# ... as well as device updates and messages
elif stream_name == DeviceListsStream.NAME:
# The entities are either user IDs (starting with '@') whose devices
# have changed, or remote servers that we need to tell about
# changes.
hosts = {row.entity for row in rows if not row.entity.startswith("@")}
for host in hosts:
self.federation_sender.send_device_messages(host)
elif stream_name == ToDeviceStream.NAME:
# The to_device stream includes stuff to be pushed to both local
# clients and remote servers, so we ignore entities that start with
# '@' (since they'll be local users rather than destinations).
hosts = {row.entity for row in rows if not row.entity.startswith("@")}
for host in hosts:
self.federation_sender.send_device_messages(host)
async def _on_new_receipts(self, rows):
"""
Args:
rows (Iterable[synapse.replication.tcp.streams.ReceiptsStream.ReceiptsStreamRow]):
new receipts to be processed
"""
for receipt in rows:
# we only want to send on receipts for our own users
if not self._is_mine_id(receipt.user_id):
continue
receipt_info = ReadReceipt(
receipt.room_id,
receipt.receipt_type,
receipt.user_id,
[receipt.event_id],
receipt.data,
)
await self.federation_sender.send_read_receipt(receipt_info)
async def update_token(self, token):
"""Update the record of where we have processed to in the federation stream.
Called after we have processed a an update received over replication. Sends
a FEDERATION_ACK back to the master, and stores the token that we have processed
in `federation_stream_position` so that we can restart where we left off.
"""
self.federation_position = token
# We save and send the ACK to master asynchronously, so we don't block
# processing on persistence. We don't need to do this operation for
# every single RDATA we receive, we just need to do it periodically.
if self._fed_position_linearizer.is_queued(None):
# There is already a task queued up to save and send the token, so
# no need to queue up another task.
return
run_as_background_process("_save_and_send_ack", self._save_and_send_ack)
async def _save_and_send_ack(self):
"""Save the current federation position in the database and send an ACK
to master with where we're up to.
"""
# We should only be calling this once we've got a token.
assert self.federation_position is not None
try:
# We linearize here to ensure we don't have races updating the token
#
# XXX this appears to be redundant, since the ReplicationCommandHandler
# has a linearizer which ensures that we only process one line of
# replication data at a time. Should we remove it, or is it doing useful
# service for robustness? Or could we replace it with an assertion that
# we're not being re-entered?
with (await self._fed_position_linearizer.queue(None)):
# We persist and ack the same position, so we take a copy of it
# here as otherwise it can get modified from underneath us.
current_position = self.federation_position
await self.store.update_federation_out_pos(
"federation", current_position
)
# We ACK this token over replication so that the master can drop
# its in memory queues
self._hs.get_tcp_replication().send_federation_ack(current_position)
except Exception:
logger.exception("Error updating federation stream position")

13
synapse/server.py
View File

@ -85,7 +85,11 @@ from synapse.handlers.initial_sync import InitialSyncHandler
from synapse.handlers.message import EventCreationHandler, MessageHandler from synapse.handlers.message import EventCreationHandler, MessageHandler
from synapse.handlers.pagination import PaginationHandler from synapse.handlers.pagination import PaginationHandler
from synapse.handlers.password_policy import PasswordPolicyHandler from synapse.handlers.password_policy import PasswordPolicyHandler
from synapse.handlers.presence import PresenceHandler from synapse.handlers.presence import (
BasePresenceHandler,
PresenceHandler,
WorkerPresenceHandler,
)
from synapse.handlers.profile import ProfileHandler from synapse.handlers.profile import ProfileHandler
from synapse.handlers.read_marker import ReadMarkerHandler from synapse.handlers.read_marker import ReadMarkerHandler
from synapse.handlers.receipts import ReceiptsHandler from synapse.handlers.receipts import ReceiptsHandler
@ -415,8 +419,11 @@ class HomeServer(metaclass=abc.ABCMeta):
return StateResolutionHandler(self) return StateResolutionHandler(self)
@cache_in_self @cache_in_self
def get_presence_handler(self) -> PresenceHandler: def get_presence_handler(self) -> BasePresenceHandler:
return PresenceHandler(self) if self.config.worker_app:
return WorkerPresenceHandler(self)
else:
return PresenceHandler(self)
@cache_in_self @cache_in_self
def get_typing_writer_handler(self) -> TypingWriterHandler: def get_typing_writer_handler(self) -> TypingWriterHandler:

8
tests/replication/_base.py
View File

@ -21,13 +21,11 @@ from twisted.web.http import HTTPChannel
from twisted.web.resource import Resource from twisted.web.resource import Resource
from twisted.web.server import Request, Site from twisted.web.server import Request, Site
from synapse.app.generic_worker import ( from synapse.app.generic_worker import GenericWorkerServer
GenericWorkerReplicationHandler,
GenericWorkerServer,
)
from synapse.http.server import JsonResource from synapse.http.server import JsonResource
from synapse.http.site import SynapseRequest, SynapseSite from synapse.http.site import SynapseRequest, SynapseSite
from synapse.replication.http import ReplicationRestResource from synapse.replication.http import ReplicationRestResource
from synapse.replication.tcp.client import ReplicationDataHandler
from synapse.replication.tcp.handler import ReplicationCommandHandler from synapse.replication.tcp.handler import ReplicationCommandHandler
from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol from synapse.replication.tcp.protocol import ClientReplicationStreamProtocol
from synapse.replication.tcp.resource import ( from synapse.replication.tcp.resource import (
@ -431,7 +429,7 @@ class BaseMultiWorkerStreamTestCase(unittest.HomeserverTestCase):
server_protocol.makeConnection(server_to_client_transport) server_protocol.makeConnection(server_to_client_transport)
class TestReplicationDataHandler(GenericWorkerReplicationHandler): class TestReplicationDataHandler(ReplicationDataHandler):
"""Drop-in for ReplicationDataHandler which just collects RDATA rows""" """Drop-in for ReplicationDataHandler which just collects RDATA rows"""
def __init__(self, hs: HomeServer): def __init__(self, hs: HomeServer):