512 lines
18 KiB
Python
512 lines
18 KiB
Python
# Copyright 2017 New Vector Ltd
|
|
# Copyright 2019-2021 The Matrix.org Foundation C.I.C
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
import atexit
|
|
import gc
|
|
import logging
|
|
import os
|
|
import platform
|
|
import signal
|
|
import socket
|
|
import sys
|
|
import traceback
|
|
import warnings
|
|
from typing import TYPE_CHECKING, Awaitable, Callable, Iterable
|
|
|
|
from cryptography.utils import CryptographyDeprecationWarning
|
|
from typing_extensions import NoReturn
|
|
|
|
import twisted
|
|
from twisted.internet import defer, error, reactor
|
|
from twisted.logger import LoggingFile, LogLevel
|
|
from twisted.protocols.tls import TLSMemoryBIOFactory
|
|
|
|
import synapse
|
|
from synapse.api.constants import MAX_PDU_SIZE
|
|
from synapse.app import check_bind_error
|
|
from synapse.app.phone_stats_home import start_phone_stats_home
|
|
from synapse.config.homeserver import HomeServerConfig
|
|
from synapse.config.server import ManholeConfig
|
|
from synapse.crypto import context_factory
|
|
from synapse.events.presence_router import load_legacy_presence_router
|
|
from synapse.events.spamcheck import load_legacy_spam_checkers
|
|
from synapse.events.third_party_rules import load_legacy_third_party_event_rules
|
|
from synapse.logging.context import PreserveLoggingContext
|
|
from synapse.metrics.background_process_metrics import wrap_as_background_process
|
|
from synapse.metrics.jemalloc import setup_jemalloc_stats
|
|
from synapse.util.caches.lrucache import setup_expire_lru_cache_entries
|
|
from synapse.util.daemonize import daemonize_process
|
|
from synapse.util.rlimit import change_resource_limit
|
|
from synapse.util.versionstring import get_version_string
|
|
|
|
if TYPE_CHECKING:
|
|
from synapse.server import HomeServer
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
# list of tuples of function, args list, kwargs dict
|
|
_sighup_callbacks = []
|
|
|
|
|
|
def register_sighup(func, *args, **kwargs):
|
|
"""
|
|
Register a function to be called when a SIGHUP occurs.
|
|
|
|
Args:
|
|
func (function): Function to be called when sent a SIGHUP signal.
|
|
*args, **kwargs: args and kwargs to be passed to the target function.
|
|
"""
|
|
_sighup_callbacks.append((func, args, kwargs))
|
|
|
|
|
|
def start_worker_reactor(appname, config, run_command=reactor.run):
|
|
"""Run the reactor in the main process
|
|
|
|
Daemonizes if necessary, and then configures some resources, before starting
|
|
the reactor. Pulls configuration from the 'worker' settings in 'config'.
|
|
|
|
Args:
|
|
appname (str): application name which will be sent to syslog
|
|
config (synapse.config.Config): config object
|
|
run_command (Callable[]): callable that actually runs the reactor
|
|
"""
|
|
|
|
logger = logging.getLogger(config.worker.worker_app)
|
|
|
|
start_reactor(
|
|
appname,
|
|
soft_file_limit=config.soft_file_limit,
|
|
gc_thresholds=config.gc_thresholds,
|
|
pid_file=config.worker_pid_file,
|
|
daemonize=config.worker_daemonize,
|
|
print_pidfile=config.print_pidfile,
|
|
logger=logger,
|
|
run_command=run_command,
|
|
)
|
|
|
|
|
|
def start_reactor(
|
|
appname,
|
|
soft_file_limit,
|
|
gc_thresholds,
|
|
pid_file,
|
|
daemonize,
|
|
print_pidfile,
|
|
logger,
|
|
run_command=reactor.run,
|
|
):
|
|
"""Run the reactor in the main process
|
|
|
|
Daemonizes if necessary, and then configures some resources, before starting
|
|
the reactor
|
|
|
|
Args:
|
|
appname (str): application name which will be sent to syslog
|
|
soft_file_limit (int):
|
|
gc_thresholds:
|
|
pid_file (str): name of pid file to write to if daemonize is True
|
|
daemonize (bool): true to run the reactor in a background process
|
|
print_pidfile (bool): whether to print the pid file, if daemonize is True
|
|
logger (logging.Logger): logger instance to pass to Daemonize
|
|
run_command (Callable[]): callable that actually runs the reactor
|
|
"""
|
|
|
|
def run():
|
|
logger.info("Running")
|
|
setup_jemalloc_stats()
|
|
change_resource_limit(soft_file_limit)
|
|
if gc_thresholds:
|
|
gc.set_threshold(*gc_thresholds)
|
|
run_command()
|
|
|
|
# make sure that we run the reactor with the sentinel log context,
|
|
# otherwise other PreserveLoggingContext instances will get confused
|
|
# and complain when they see the logcontext arbitrarily swapping
|
|
# between the sentinel and `run` logcontexts.
|
|
#
|
|
# We also need to drop the logcontext before forking if we're daemonizing,
|
|
# otherwise the cputime metrics get confused about the per-thread resource usage
|
|
# appearing to go backwards.
|
|
with PreserveLoggingContext():
|
|
if daemonize:
|
|
if print_pidfile:
|
|
print(pid_file)
|
|
|
|
daemonize_process(pid_file, logger)
|
|
run()
|
|
|
|
|
|
def quit_with_error(error_string: str) -> NoReturn:
|
|
message_lines = error_string.split("\n")
|
|
line_length = min(max(len(line) for line in message_lines), 80) + 2
|
|
sys.stderr.write("*" * line_length + "\n")
|
|
for line in message_lines:
|
|
sys.stderr.write(" %s\n" % (line.rstrip(),))
|
|
sys.stderr.write("*" * line_length + "\n")
|
|
sys.exit(1)
|
|
|
|
|
|
def handle_startup_exception(e: Exception) -> NoReturn:
|
|
# Exceptions that occur between setting up the logging and forking or starting
|
|
# the reactor are written to the logs, followed by a summary to stderr.
|
|
logger.exception("Exception during startup")
|
|
quit_with_error(
|
|
f"Error during initialisation:\n {e}\nThere may be more information in the logs."
|
|
)
|
|
|
|
|
|
def redirect_stdio_to_logs() -> None:
|
|
streams = [("stdout", LogLevel.info), ("stderr", LogLevel.error)]
|
|
|
|
for (stream, level) in streams:
|
|
oldStream = getattr(sys, stream)
|
|
loggingFile = LoggingFile(
|
|
logger=twisted.logger.Logger(namespace=stream),
|
|
level=level,
|
|
encoding=getattr(oldStream, "encoding", None),
|
|
)
|
|
setattr(sys, stream, loggingFile)
|
|
|
|
print("Redirected stdout/stderr to logs")
|
|
|
|
|
|
def register_start(cb: Callable[..., Awaitable], *args, **kwargs) -> None:
|
|
"""Register a callback with the reactor, to be called once it is running
|
|
|
|
This can be used to initialise parts of the system which require an asynchronous
|
|
setup.
|
|
|
|
Any exception raised by the callback will be printed and logged, and the process
|
|
will exit.
|
|
"""
|
|
|
|
async def wrapper():
|
|
try:
|
|
await cb(*args, **kwargs)
|
|
except Exception:
|
|
# previously, we used Failure().printTraceback() here, in the hope that
|
|
# would give better tracebacks than traceback.print_exc(). However, that
|
|
# doesn't handle chained exceptions (with a __cause__ or __context__) well,
|
|
# and I *think* the need for Failure() is reduced now that we mostly use
|
|
# async/await.
|
|
|
|
# Write the exception to both the logs *and* the unredirected stderr,
|
|
# because people tend to get confused if it only goes to one or the other.
|
|
#
|
|
# One problem with this is that if people are using a logging config that
|
|
# logs to the console (as is common eg under docker), they will get two
|
|
# copies of the exception. We could maybe try to detect that, but it's
|
|
# probably a cost we can bear.
|
|
logger.fatal("Error during startup", exc_info=True)
|
|
print("Error during startup:", file=sys.__stderr__)
|
|
traceback.print_exc(file=sys.__stderr__)
|
|
|
|
# it's no use calling sys.exit here, since that just raises a SystemExit
|
|
# exception which is then caught by the reactor, and everything carries
|
|
# on as normal.
|
|
os._exit(1)
|
|
|
|
reactor.callWhenRunning(lambda: defer.ensureDeferred(wrapper()))
|
|
|
|
|
|
def listen_metrics(bind_addresses, port):
|
|
"""
|
|
Start Prometheus metrics server.
|
|
"""
|
|
from synapse.metrics import RegistryProxy, start_http_server
|
|
|
|
for host in bind_addresses:
|
|
logger.info("Starting metrics listener on %s:%d", host, port)
|
|
start_http_server(port, addr=host, registry=RegistryProxy)
|
|
|
|
|
|
def listen_manhole(
|
|
bind_addresses: Iterable[str],
|
|
port: int,
|
|
manhole_settings: ManholeConfig,
|
|
manhole_globals: dict,
|
|
):
|
|
# twisted.conch.manhole 21.1.0 uses "int_from_bytes", which produces a confusing
|
|
# warning. It's fixed by https://github.com/twisted/twisted/pull/1522), so
|
|
# suppress the warning for now.
|
|
warnings.filterwarnings(
|
|
action="ignore",
|
|
category=CryptographyDeprecationWarning,
|
|
message="int_from_bytes is deprecated",
|
|
)
|
|
|
|
from synapse.util.manhole import manhole
|
|
|
|
listen_tcp(
|
|
bind_addresses,
|
|
port,
|
|
manhole(settings=manhole_settings, globals=manhole_globals),
|
|
)
|
|
|
|
|
|
def listen_tcp(bind_addresses, port, factory, reactor=reactor, backlog=50):
|
|
"""
|
|
Create a TCP socket for a port and several addresses
|
|
|
|
Returns:
|
|
list[twisted.internet.tcp.Port]: listening for TCP connections
|
|
"""
|
|
r = []
|
|
for address in bind_addresses:
|
|
try:
|
|
r.append(reactor.listenTCP(port, factory, backlog, address))
|
|
except error.CannotListenError as e:
|
|
check_bind_error(e, address, bind_addresses)
|
|
|
|
return r
|
|
|
|
|
|
def listen_ssl(
|
|
bind_addresses, port, factory, context_factory, reactor=reactor, backlog=50
|
|
):
|
|
"""
|
|
Create an TLS-over-TCP socket for a port and several addresses
|
|
|
|
Returns:
|
|
list of twisted.internet.tcp.Port listening for TLS connections
|
|
"""
|
|
r = []
|
|
for address in bind_addresses:
|
|
try:
|
|
r.append(
|
|
reactor.listenSSL(port, factory, context_factory, backlog, address)
|
|
)
|
|
except error.CannotListenError as e:
|
|
check_bind_error(e, address, bind_addresses)
|
|
|
|
return r
|
|
|
|
|
|
def refresh_certificate(hs):
|
|
"""
|
|
Refresh the TLS certificates that Synapse is using by re-reading them from
|
|
disk and updating the TLS context factories to use them.
|
|
"""
|
|
if not hs.config.has_tls_listener():
|
|
return
|
|
|
|
hs.config.read_certificate_from_disk()
|
|
hs.tls_server_context_factory = context_factory.ServerContextFactory(hs.config)
|
|
|
|
if hs._listening_services:
|
|
logger.info("Updating context factories...")
|
|
for i in hs._listening_services:
|
|
# When you listenSSL, it doesn't make an SSL port but a TCP one with
|
|
# a TLS wrapping factory around the factory you actually want to get
|
|
# requests. This factory attribute is public but missing from
|
|
# Twisted's documentation.
|
|
if isinstance(i.factory, TLSMemoryBIOFactory):
|
|
addr = i.getHost()
|
|
logger.info(
|
|
"Replacing TLS context factory on [%s]:%i", addr.host, addr.port
|
|
)
|
|
# We want to replace TLS factories with a new one, with the new
|
|
# TLS configuration. We do this by reaching in and pulling out
|
|
# the wrappedFactory, and then re-wrapping it.
|
|
i.factory = TLSMemoryBIOFactory(
|
|
hs.tls_server_context_factory, False, i.factory.wrappedFactory
|
|
)
|
|
logger.info("Context factories updated.")
|
|
|
|
|
|
async def start(hs: "HomeServer"):
|
|
"""
|
|
Start a Synapse server or worker.
|
|
|
|
Should be called once the reactor is running.
|
|
|
|
Will start the main HTTP listeners and do some other startup tasks, and then
|
|
notify systemd.
|
|
|
|
Args:
|
|
hs: homeserver instance
|
|
"""
|
|
# Set up the SIGHUP machinery.
|
|
if hasattr(signal, "SIGHUP"):
|
|
reactor = hs.get_reactor()
|
|
|
|
@wrap_as_background_process("sighup")
|
|
def handle_sighup(*args, **kwargs):
|
|
# Tell systemd our state, if we're using it. This will silently fail if
|
|
# we're not using systemd.
|
|
sdnotify(b"RELOADING=1")
|
|
|
|
for i, args, kwargs in _sighup_callbacks:
|
|
i(*args, **kwargs)
|
|
|
|
sdnotify(b"READY=1")
|
|
|
|
# We defer running the sighup handlers until next reactor tick. This
|
|
# is so that we're in a sane state, e.g. flushing the logs may fail
|
|
# if the sighup happens in the middle of writing a log entry.
|
|
def run_sighup(*args, **kwargs):
|
|
# `callFromThread` should be "signal safe" as well as thread
|
|
# safe.
|
|
reactor.callFromThread(handle_sighup, *args, **kwargs)
|
|
|
|
signal.signal(signal.SIGHUP, run_sighup)
|
|
|
|
register_sighup(refresh_certificate, hs)
|
|
|
|
# Load the certificate from disk.
|
|
refresh_certificate(hs)
|
|
|
|
# Start the tracer
|
|
synapse.logging.opentracing.init_tracer(hs) # type: ignore[attr-defined] # noqa
|
|
|
|
# Instantiate the modules so they can register their web resources to the module API
|
|
# before we start the listeners.
|
|
module_api = hs.get_module_api()
|
|
for module, config in hs.config.modules.loaded_modules:
|
|
module(config=config, api=module_api)
|
|
|
|
load_legacy_spam_checkers(hs)
|
|
load_legacy_third_party_event_rules(hs)
|
|
load_legacy_presence_router(hs)
|
|
|
|
# If we've configured an expiry time for caches, start the background job now.
|
|
setup_expire_lru_cache_entries(hs)
|
|
|
|
# It is now safe to start your Synapse.
|
|
hs.start_listening()
|
|
hs.get_datastore().db_pool.start_profiling()
|
|
hs.get_pusherpool().start()
|
|
|
|
# Log when we start the shut down process.
|
|
hs.get_reactor().addSystemEventTrigger(
|
|
"before", "shutdown", logger.info, "Shutting down..."
|
|
)
|
|
|
|
setup_sentry(hs)
|
|
setup_sdnotify(hs)
|
|
|
|
# If background tasks are running on the main process, start collecting the
|
|
# phone home stats.
|
|
if hs.config.worker.run_background_tasks:
|
|
start_phone_stats_home(hs)
|
|
|
|
# We now freeze all allocated objects in the hopes that (almost)
|
|
# everything currently allocated are things that will be used for the
|
|
# rest of time. Doing so means less work each GC (hopefully).
|
|
#
|
|
# This only works on Python 3.7
|
|
if platform.python_implementation() == "CPython" and sys.version_info >= (3, 7):
|
|
gc.collect()
|
|
gc.freeze()
|
|
|
|
# Speed up shutdowns by freezing all allocated objects. This moves everything
|
|
# into the permanent generation and excludes them from the final GC.
|
|
# Unfortunately only works on Python 3.7
|
|
if platform.python_implementation() == "CPython" and sys.version_info >= (3, 7):
|
|
atexit.register(gc.freeze)
|
|
|
|
|
|
def setup_sentry(hs):
|
|
"""Enable sentry integration, if enabled in configuration
|
|
|
|
Args:
|
|
hs (synapse.server.HomeServer)
|
|
"""
|
|
|
|
if not hs.config.sentry_enabled:
|
|
return
|
|
|
|
import sentry_sdk
|
|
|
|
sentry_sdk.init(dsn=hs.config.sentry_dsn, release=get_version_string(synapse))
|
|
|
|
# We set some default tags that give some context to this instance
|
|
with sentry_sdk.configure_scope() as scope:
|
|
scope.set_tag("matrix_server_name", hs.config.server.server_name)
|
|
|
|
app = (
|
|
hs.config.worker.worker_app
|
|
if hs.config.worker.worker_app
|
|
else "synapse.app.homeserver"
|
|
)
|
|
name = hs.get_instance_name()
|
|
scope.set_tag("worker_app", app)
|
|
scope.set_tag("worker_name", name)
|
|
|
|
|
|
def setup_sdnotify(hs):
|
|
"""Adds process state hooks to tell systemd what we are up to."""
|
|
|
|
# Tell systemd our state, if we're using it. This will silently fail if
|
|
# we're not using systemd.
|
|
sdnotify(b"READY=1\nMAINPID=%i" % (os.getpid(),))
|
|
|
|
hs.get_reactor().addSystemEventTrigger(
|
|
"before", "shutdown", sdnotify, b"STOPPING=1"
|
|
)
|
|
|
|
|
|
sdnotify_sockaddr = os.getenv("NOTIFY_SOCKET")
|
|
|
|
|
|
def sdnotify(state):
|
|
"""
|
|
Send a notification to systemd, if the NOTIFY_SOCKET env var is set.
|
|
|
|
This function is based on the sdnotify python package, but since it's only a few
|
|
lines of code, it's easier to duplicate it here than to add a dependency on a
|
|
package which many OSes don't include as a matter of principle.
|
|
|
|
Args:
|
|
state (bytes): notification to send
|
|
"""
|
|
if not isinstance(state, bytes):
|
|
raise TypeError("sdnotify should be called with a bytes")
|
|
if not sdnotify_sockaddr:
|
|
return
|
|
addr = sdnotify_sockaddr
|
|
if addr[0] == "@":
|
|
addr = "\0" + addr[1:]
|
|
|
|
try:
|
|
with socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM) as sock:
|
|
sock.connect(addr)
|
|
sock.sendall(state)
|
|
except Exception as e:
|
|
# this is a bit surprising, since we don't expect to have a NOTIFY_SOCKET
|
|
# unless systemd is expecting us to notify it.
|
|
logger.warning("Unable to send notification to systemd: %s", e)
|
|
|
|
|
|
def max_request_body_size(config: HomeServerConfig) -> int:
|
|
"""Get a suitable maximum size for incoming HTTP requests"""
|
|
|
|
# Other than media uploads, the biggest request we expect to see is a fully-loaded
|
|
# /federation/v1/send request.
|
|
#
|
|
# The main thing in such a request is up to 50 PDUs, and up to 100 EDUs. PDUs are
|
|
# limited to 65536 bytes (possibly slightly more if the sender didn't use canonical
|
|
# json encoding); there is no specced limit to EDUs (see
|
|
# https://github.com/matrix-org/matrix-doc/issues/3121).
|
|
#
|
|
# in short, we somewhat arbitrarily limit requests to 200 * 64K (about 12.5M)
|
|
#
|
|
max_request_size = 200 * MAX_PDU_SIZE
|
|
|
|
# if we have a media repo enabled, we may need to allow larger uploads than that
|
|
if config.media.can_load_media_repo:
|
|
max_request_size = max(max_request_size, config.media.max_upload_size)
|
|
|
|
return max_request_size
|