diff options
Diffstat (limited to 'synapse/federation/sender')
| -rw-r--r-- | synapse/federation/sender/__init__.py | 388 | ||||
| -rw-r--r-- | synapse/federation/sender/per_destination_queue.py | 318 | ||||
| -rw-r--r-- | synapse/federation/sender/transaction_manager.py | 147 |
3 files changed, 853 insertions, 0 deletions
diff --git a/synapse/federation/sender/__init__.py b/synapse/federation/sender/__init__.py new file mode 100644 index 0000000000..1bcc353d18 --- /dev/null +++ b/synapse/federation/sender/__init__.py @@ -0,0 +1,388 @@ +# -*- coding: utf-8 -*- +# Copyright 2019 New Vector Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +import logging + +from six import itervalues + +from prometheus_client import Counter + +from twisted.internet import defer + +import synapse.metrics +from synapse.federation.sender.per_destination_queue import PerDestinationQueue +from synapse.federation.sender.transaction_manager import TransactionManager +from synapse.federation.units import Edu +from synapse.handlers.presence import get_interested_remotes +from synapse.metrics import ( + LaterGauge, + event_processing_loop_counter, + event_processing_loop_room_count, + events_processed_counter, +) +from synapse.metrics.background_process_metrics import run_as_background_process +from synapse.util import logcontext +from synapse.util.metrics import measure_func + +logger = logging.getLogger(__name__) + +sent_pdus_destination_dist_count = Counter( + "synapse_federation_client_sent_pdu_destinations:count", + "Number of PDUs queued for sending to one or more destinations", +) + +sent_pdus_destination_dist_total = Counter( + "synapse_federation_client_sent_pdu_destinations:total", "" + "Total number of PDUs queued for sending across all destinations", +) + + +class FederationSender(object): + def __init__(self, hs): + self.hs = hs + self.server_name = hs.hostname + + self.store = hs.get_datastore() + self.state = hs.get_state_handler() + + self.clock = hs.get_clock() + self.is_mine_id = hs.is_mine_id + + self._transaction_manager = TransactionManager(hs) + + # map from destination to PerDestinationQueue + self._per_destination_queues = {} # type: dict[str, PerDestinationQueue] + + LaterGauge( + "synapse_federation_transaction_queue_pending_destinations", + "", + [], + lambda: sum( + 1 for d in self._per_destination_queues.values() + if d.transmission_loop_running + ), + ) + + # Map of user_id -> UserPresenceState for all the pending presence + # to be sent out by user_id. Entries here get processed and put in + # pending_presence_by_dest + self.pending_presence = {} + + LaterGauge( + "synapse_federation_transaction_queue_pending_pdus", + "", + [], + lambda: sum( + d.pending_pdu_count() for d in self._per_destination_queues.values() + ), + ) + LaterGauge( + "synapse_federation_transaction_queue_pending_edus", + "", + [], + lambda: sum( + d.pending_edu_count() for d in self._per_destination_queues.values() + ), + ) + + self._order = 1 + + self._is_processing = False + self._last_poked_id = -1 + + self._processing_pending_presence = False + + def _get_per_destination_queue(self, destination): + queue = self._per_destination_queues.get(destination) + if not queue: + queue = PerDestinationQueue(self.hs, self._transaction_manager, destination) + self._per_destination_queues[destination] = queue + return queue + + def notify_new_events(self, current_id): + """This gets called when we have some new events we might want to + send out to other servers. + """ + self._last_poked_id = max(current_id, self._last_poked_id) + + if self._is_processing: + return + + # fire off a processing loop in the background + run_as_background_process( + "process_event_queue_for_federation", + self._process_event_queue_loop, + ) + + @defer.inlineCallbacks + def _process_event_queue_loop(self): + try: + self._is_processing = True + while True: + last_token = yield self.store.get_federation_out_pos("events") + next_token, events = yield self.store.get_all_new_events_stream( + last_token, self._last_poked_id, limit=100, + ) + + logger.debug("Handling %s -> %s", last_token, next_token) + + if not events and next_token >= self._last_poked_id: + break + + @defer.inlineCallbacks + def handle_event(event): + # Only send events for this server. + send_on_behalf_of = event.internal_metadata.get_send_on_behalf_of() + is_mine = self.is_mine_id(event.sender) + if not is_mine and send_on_behalf_of is None: + return + + try: + # Get the state from before the event. + # We need to make sure that this is the state from before + # the event and not from after it. + # Otherwise if the last member on a server in a room is + # banned then it won't receive the event because it won't + # be in the room after the ban. + destinations = yield self.state.get_current_hosts_in_room( + event.room_id, latest_event_ids=event.prev_event_ids(), + ) + except Exception: + logger.exception( + "Failed to calculate hosts in room for event: %s", + event.event_id, + ) + return + + destinations = set(destinations) + + if send_on_behalf_of is not None: + # If we are sending the event on behalf of another server + # then it already has the event and there is no reason to + # send the event to it. + destinations.discard(send_on_behalf_of) + + logger.debug("Sending %s to %r", event, destinations) + + self._send_pdu(event, destinations) + + @defer.inlineCallbacks + def handle_room_events(events): + for event in events: + yield handle_event(event) + + events_by_room = {} + for event in events: + events_by_room.setdefault(event.room_id, []).append(event) + + yield logcontext.make_deferred_yieldable(defer.gatherResults( + [ + logcontext.run_in_background(handle_room_events, evs) + for evs in itervalues(events_by_room) + ], + consumeErrors=True + )) + + yield self.store.update_federation_out_pos( + "events", next_token + ) + + if events: + now = self.clock.time_msec() + ts = yield self.store.get_received_ts(events[-1].event_id) + + synapse.metrics.event_processing_lag.labels( + "federation_sender").set(now - ts) + synapse.metrics.event_processing_last_ts.labels( + "federation_sender").set(ts) + + events_processed_counter.inc(len(events)) + + event_processing_loop_room_count.labels( + "federation_sender" + ).inc(len(events_by_room)) + + event_processing_loop_counter.labels("federation_sender").inc() + + synapse.metrics.event_processing_positions.labels( + "federation_sender").set(next_token) + + finally: + self._is_processing = False + + def _send_pdu(self, pdu, destinations): + # We loop through all destinations to see whether we already have + # a transaction in progress. If we do, stick it in the pending_pdus + # table and we'll get back to it later. + + order = self._order + self._order += 1 + + destinations = set(destinations) + destinations.discard(self.server_name) + logger.debug("Sending to: %s", str(destinations)) + + if not destinations: + return + + sent_pdus_destination_dist_total.inc(len(destinations)) + sent_pdus_destination_dist_count.inc() + + for destination in destinations: + self._get_per_destination_queue(destination).send_pdu(pdu, order) + + @defer.inlineCallbacks + def send_read_receipt(self, receipt): + """Send a RR to any other servers in the room + + Args: + receipt (synapse.types.ReadReceipt): receipt to be sent + """ + # Work out which remote servers should be poked and poke them. + domains = yield self.state.get_current_hosts_in_room(receipt.room_id) + domains = [d for d in domains if d != self.server_name] + if not domains: + return + + logger.debug("Sending receipt to: %r", domains) + + content = { + receipt.room_id: { + receipt.receipt_type: { + receipt.user_id: { + "event_ids": receipt.event_ids, + "data": receipt.data, + }, + }, + }, + } + key = (receipt.room_id, receipt.receipt_type, receipt.user_id) + + for domain in domains: + self.build_and_send_edu( + destination=domain, + edu_type="m.receipt", + content=content, + key=key, + ) + + @logcontext.preserve_fn # the caller should not yield on this + @defer.inlineCallbacks + def send_presence(self, states): + """Send the new presence states to the appropriate destinations. + + This actually queues up the presence states ready for sending and + triggers a background task to process them and send out the transactions. + + Args: + states (list(UserPresenceState)) + """ + if not self.hs.config.use_presence: + # No-op if presence is disabled. + return + + # First we queue up the new presence by user ID, so multiple presence + # updates in quick successtion are correctly handled + # We only want to send presence for our own users, so lets always just + # filter here just in case. + self.pending_presence.update({ + state.user_id: state for state in states + if self.is_mine_id(state.user_id) + }) + + # We then handle the new pending presence in batches, first figuring + # out the destinations we need to send each state to and then poking it + # to attempt a new transaction. We linearize this so that we don't + # accidentally mess up the ordering and send multiple presence updates + # in the wrong order + if self._processing_pending_presence: + return + + self._processing_pending_presence = True + try: + while True: + states_map = self.pending_presence + self.pending_presence = {} + + if not states_map: + break + + yield self._process_presence_inner(list(states_map.values())) + except Exception: + logger.exception("Error sending presence states to servers") + finally: + self._processing_pending_presence = False + + @measure_func("txnqueue._process_presence") + @defer.inlineCallbacks + def _process_presence_inner(self, states): + """Given a list of states populate self.pending_presence_by_dest and + poke to send a new transaction to each destination + + Args: + states (list(UserPresenceState)) + """ + hosts_and_states = yield get_interested_remotes(self.store, states, self.state) + + for destinations, states in hosts_and_states: + for destination in destinations: + if destination == self.server_name: + continue + self._get_per_destination_queue(destination).send_presence(states) + + def build_and_send_edu(self, destination, edu_type, content, key=None): + """Construct an Edu object, and queue it for sending + + Args: + destination (str): name of server to send to + edu_type (str): type of EDU to send + content (dict): content of EDU + key (Any|None): clobbering key for this edu + """ + if destination == self.server_name: + logger.info("Not sending EDU to ourselves") + return + + edu = Edu( + origin=self.server_name, + destination=destination, + edu_type=edu_type, + content=content, + ) + + self.send_edu(edu, key) + + def send_edu(self, edu, key): + """Queue an EDU for sending + + Args: + edu (Edu): edu to send + key (Any|None): clobbering key for this edu + """ + queue = self._get_per_destination_queue(edu.destination) + if key: + queue.send_keyed_edu(edu, key) + else: + queue.send_edu(edu) + + def send_device_messages(self, destination): + if destination == self.server_name: + logger.info("Not sending device update to ourselves") + return + + self._get_per_destination_queue(destination).attempt_new_transaction() + + def get_current_token(self): + return 0 diff --git a/synapse/federation/sender/per_destination_queue.py b/synapse/federation/sender/per_destination_queue.py new file mode 100644 index 0000000000..385039add4 --- /dev/null +++ b/synapse/federation/sender/per_destination_queue.py @@ -0,0 +1,318 @@ +# -*- coding: utf-8 -*- +# Copyright 2014-2016 OpenMarket Ltd +# Copyright 2019 New Vector Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +import datetime +import logging + +from prometheus_client import Counter + +from twisted.internet import defer + +from synapse.api.errors import ( + FederationDeniedError, + HttpResponseException, + RequestSendFailed, +) +from synapse.events import EventBase +from synapse.federation.units import Edu +from synapse.handlers.presence import format_user_presence_state +from synapse.metrics import sent_transactions_counter +from synapse.metrics.background_process_metrics import run_as_background_process +from synapse.storage import UserPresenceState +from synapse.util.retryutils import NotRetryingDestination, get_retry_limiter + +logger = logging.getLogger(__name__) + + +sent_edus_counter = Counter( + "synapse_federation_client_sent_edus", + "Total number of EDUs successfully sent", +) + +sent_edus_by_type = Counter( + "synapse_federation_client_sent_edus_by_type", + "Number of sent EDUs successfully sent, by event type", + ["type"], +) + + +class PerDestinationQueue(object): + """ + Manages the per-destination transmission queues. + + Args: + hs (synapse.HomeServer): + transaction_sender (TransactionManager): + destination (str): the server_name of the destination that we are managing + transmission for. + """ + def __init__(self, hs, transaction_manager, destination): + self._server_name = hs.hostname + self._clock = hs.get_clock() + self._store = hs.get_datastore() + self._transaction_manager = transaction_manager + + self._destination = destination + self.transmission_loop_running = False + + # a list of tuples of (pending pdu, order) + self._pending_pdus = [] # type: list[tuple[EventBase, int]] + self._pending_edus = [] # type: list[Edu] + + # Pending EDUs by their "key". Keyed EDUs are EDUs that get clobbered + # based on their key (e.g. typing events by room_id) + # Map of (edu_type, key) -> Edu + self._pending_edus_keyed = {} # type: dict[tuple[str, str], Edu] + + # Map of user_id -> UserPresenceState of pending presence to be sent to this + # destination + self._pending_presence = {} # type: dict[str, UserPresenceState] + + # stream_id of last successfully sent to-device message. + # NB: may be a long or an int. + self._last_device_stream_id = 0 + + # stream_id of last successfully sent device list update. + self._last_device_list_stream_id = 0 + + def pending_pdu_count(self): + return len(self._pending_pdus) + + def pending_edu_count(self): + return ( + len(self._pending_edus) + + len(self._pending_presence) + + len(self._pending_edus_keyed) + ) + + def send_pdu(self, pdu, order): + """Add a PDU to the queue, and start the transmission loop if neccessary + + Args: + pdu (EventBase): pdu to send + order (int): + """ + self._pending_pdus.append((pdu, order)) + self.attempt_new_transaction() + + def send_presence(self, states): + """Add presence updates to the queue. Start the transmission loop if neccessary. + + Args: + states (iterable[UserPresenceState]): presence to send + """ + self._pending_presence.update({ + state.user_id: state for state in states + }) + self.attempt_new_transaction() + + def send_keyed_edu(self, edu, key): + self._pending_edus_keyed[(edu.edu_type, key)] = edu + self.attempt_new_transaction() + + def send_edu(self, edu): + self._pending_edus.append(edu) + self.attempt_new_transaction() + + def attempt_new_transaction(self): + """Try to start a new transaction to this destination + + If there is already a transaction in progress to this destination, + returns immediately. Otherwise kicks off the process of sending a + transaction in the background. + """ + # list of (pending_pdu, deferred, order) + if self.transmission_loop_running: + # XXX: this can get stuck on by a never-ending + # request at which point pending_pdus just keeps growing. + # we need application-layer timeouts of some flavour of these + # requests + logger.debug( + "TX [%s] Transaction already in progress", + self._destination + ) + return + + logger.debug("TX [%s] Starting transaction loop", self._destination) + + run_as_background_process( + "federation_transaction_transmission_loop", + self._transaction_transmission_loop, + ) + + @defer.inlineCallbacks + def _transaction_transmission_loop(self): + pending_pdus = [] + try: + self.transmission_loop_running = True + + # This will throw if we wouldn't retry. We do this here so we fail + # quickly, but we will later check this again in the http client, + # hence why we throw the result away. + yield get_retry_limiter(self._destination, self._clock, self._store) + + pending_pdus = [] + while True: + device_message_edus, device_stream_id, dev_list_id = ( + yield self._get_new_device_messages() + ) + + # BEGIN CRITICAL SECTION + # + # In order to avoid a race condition, we need to make sure that + # the following code (from popping the queues up to the point + # where we decide if we actually have any pending messages) is + # atomic - otherwise new PDUs or EDUs might arrive in the + # meantime, but not get sent because we hold the + # transmission_loop_running flag. + + pending_pdus = self._pending_pdus + + # We can only include at most 50 PDUs per transactions + pending_pdus, self._pending_pdus = pending_pdus[:50], pending_pdus[50:] + + pending_edus = self._pending_edus + + # We can only include at most 100 EDUs per transactions + pending_edus, self._pending_edus = pending_edus[:100], pending_edus[100:] + + pending_edus.extend( + self._pending_edus_keyed.values() + ) + + self._pending_edus_keyed = {} + + pending_edus.extend(device_message_edus) + + pending_presence = self._pending_presence + self._pending_presence = {} + if pending_presence: + pending_edus.append( + Edu( + origin=self._server_name, + destination=self._destination, + edu_type="m.presence", + content={ + "push": [ + format_user_presence_state( + presence, self._clock.time_msec() + ) + for presence in pending_presence.values() + ] + }, + ) + ) + + if pending_pdus: + logger.debug("TX [%s] len(pending_pdus_by_dest[dest]) = %d", + self._destination, len(pending_pdus)) + + if not pending_pdus and not pending_edus: + logger.debug("TX [%s] Nothing to send", self._destination) + self._last_device_stream_id = device_stream_id + return + + # END CRITICAL SECTION + + success = yield self._transaction_manager.send_new_transaction( + self._destination, pending_pdus, pending_edus + ) + if success: + sent_transactions_counter.inc() + sent_edus_counter.inc(len(pending_edus)) + for edu in pending_edus: + sent_edus_by_type.labels(edu.edu_type).inc() + # Remove the acknowledged device messages from the database + # Only bother if we actually sent some device messages + if device_message_edus: + yield self._store.delete_device_msgs_for_remote( + self._destination, device_stream_id + ) + logger.info( + "Marking as sent %r %r", self._destination, dev_list_id + ) + yield self._store.mark_as_sent_devices_by_remote( + self._destination, dev_list_id + ) + + self._last_device_stream_id = device_stream_id + self._last_device_list_stream_id = dev_list_id + else: + break + except NotRetryingDestination as e: + logger.debug( + "TX [%s] not ready for retry yet (next retry at %s) - " + "dropping transaction for now", + self._destination, + datetime.datetime.fromtimestamp( + (e.retry_last_ts + e.retry_interval) / 1000.0 + ), + ) + except FederationDeniedError as e: + logger.info(e) + except HttpResponseException as e: + logger.warning( + "TX [%s] Received %d response to transaction: %s", + self._destination, e.code, e, + ) + except RequestSendFailed as e: + logger.warning("TX [%s] Failed to send transaction: %s", self._destination, e) + + for p, _ in pending_pdus: + logger.info("Failed to send event %s to %s", p.event_id, + self._destination) + except Exception: + logger.exception( + "TX [%s] Failed to send transaction", + self._destination, + ) + for p, _ in pending_pdus: + logger.info("Failed to send event %s to %s", p.event_id, + self._destination) + finally: + # We want to be *very* sure we clear this after we stop processing + self.transmission_loop_running = False + + @defer.inlineCallbacks + def _get_new_device_messages(self): + last_device_stream_id = self._last_device_stream_id + to_device_stream_id = self._store.get_to_device_stream_token() + contents, stream_id = yield self._store.get_new_device_msgs_for_remote( + self._destination, last_device_stream_id, to_device_stream_id + ) + edus = [ + Edu( + origin=self._server_name, + destination=self._destination, + edu_type="m.direct_to_device", + content=content, + ) + for content in contents + ] + + last_device_list = self._last_device_list_stream_id + now_stream_id, results = yield self._store.get_devices_by_remote( + self._destination, last_device_list + ) + edus.extend( + Edu( + origin=self._server_name, + destination=self._destination, + edu_type="m.device_list_update", + content=content, + ) + for content in results + ) + defer.returnValue((edus, stream_id, now_stream_id)) diff --git a/synapse/federation/sender/transaction_manager.py b/synapse/federation/sender/transaction_manager.py new file mode 100644 index 0000000000..35e6b8ff5b --- /dev/null +++ b/synapse/federation/sender/transaction_manager.py @@ -0,0 +1,147 @@ +# -*- coding: utf-8 -*- +# Copyright 2019 New Vector Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +import logging + +from twisted.internet import defer + +from synapse.api.errors import HttpResponseException +from synapse.federation.persistence import TransactionActions +from synapse.federation.units import Transaction +from synapse.util.metrics import measure_func + +logger = logging.getLogger(__name__) + + +class TransactionManager(object): + """Helper class which handles building and sending transactions + + shared between PerDestinationQueue objects + """ + def __init__(self, hs): + self._server_name = hs.hostname + self.clock = hs.get_clock() # nb must be called this for @measure_func + self._store = hs.get_datastore() + self._transaction_actions = TransactionActions(self._store) + self._transport_layer = hs.get_federation_transport_client() + + # HACK to get unique tx id + self._next_txn_id = int(self.clock.time_msec()) + + @measure_func("_send_new_transaction") + @defer.inlineCallbacks + def send_new_transaction(self, destination, pending_pdus, pending_edus): + + # Sort based on the order field + pending_pdus.sort(key=lambda t: t[1]) + pdus = [x[0] for x in pending_pdus] + edus = pending_edus + + success = True + + logger.debug("TX [%s] _attempt_new_transaction", destination) + + txn_id = str(self._next_txn_id) + + logger.debug( + "TX [%s] {%s} Attempting new transaction" + " (pdus: %d, edus: %d)", + destination, txn_id, + len(pdus), + len(edus), + ) + + logger.debug("TX [%s] Persisting transaction...", destination) + + transaction = Transaction.create_new( + origin_server_ts=int(self.clock.time_msec()), + transaction_id=txn_id, + origin=self._server_name, + destination=destination, + pdus=pdus, + edus=edus, + ) + + self._next_txn_id += 1 + + yield self._transaction_actions.prepare_to_send(transaction) + + logger.debug("TX [%s] Persisted transaction", destination) + logger.info( + "TX [%s] {%s} Sending transaction [%s]," + " (PDUs: %d, EDUs: %d)", + destination, txn_id, + transaction.transaction_id, + len(pdus), + len(edus), + ) + + # Actually send the transaction + + # FIXME (erikj): This is a bit of a hack to make the Pdu age + # keys work + def json_data_cb(): + data = transaction.get_dict() + now = int(self.clock.time_msec()) + if "pdus" in data: + for p in data["pdus"]: + if "age_ts" in p: + unsigned = p.setdefault("unsigned", {}) + unsigned["age"] = now - int(p["age_ts"]) + del p["age_ts"] + return data + + try: + response = yield self._transport_layer.send_transaction( + transaction, json_data_cb + ) + code = 200 + except HttpResponseException as e: + code = e.code + response = e.response + + if e.code in (401, 404, 429) or 500 <= e.code: + logger.info( + "TX [%s] {%s} got %d response", + destination, txn_id, code + ) + raise e + + logger.info( + "TX [%s] {%s} got %d response", + destination, txn_id, code + ) + + yield self._transaction_actions.delivered( + transaction, code, response + ) + + logger.debug("TX [%s] {%s} Marked as delivered", destination, txn_id) + + if code == 200: + for e_id, r in response.get("pdus", {}).items(): + if "error" in r: + logger.warn( + "TX [%s] {%s} Remote returned error for %s: %s", + destination, txn_id, e_id, r, + ) + else: + for p in pdus: + logger.warn( + "TX [%s] {%s} Failed to send event %s", + destination, txn_id, p.event_id, + ) + success = False + + defer.returnValue(success) |