mirror of
https://mau.dev/maunium/synapse.git
synced 2024-12-15 17:43:52 +01:00
7127855741
Synctl did not check if a worker thread was already running when using `synctl start` and would naively start a fresh copy. This would sometimes lead to cases where many duplicate copies of a single worker would run. This fix adds a pid check when starting worker threads and synctl will now refuse to start individual workers if they're already running.
386 lines
12 KiB
Python
Executable file
386 lines
12 KiB
Python
Executable file
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
# Copyright 2014-2016 OpenMarket Ltd
|
|
# Copyright 2018 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 argparse
|
|
import collections
|
|
import errno
|
|
import glob
|
|
import os
|
|
import os.path
|
|
import signal
|
|
import subprocess
|
|
import sys
|
|
import time
|
|
|
|
import yaml
|
|
|
|
from synapse.config import find_config_files
|
|
|
|
SYNAPSE = [sys.executable, "-B", "-m", "synapse.app.homeserver"]
|
|
|
|
GREEN = "\x1b[1;32m"
|
|
YELLOW = "\x1b[1;33m"
|
|
RED = "\x1b[1;31m"
|
|
NORMAL = "\x1b[m"
|
|
|
|
|
|
def pid_running(pid):
|
|
try:
|
|
os.kill(pid, 0)
|
|
return True
|
|
except OSError as err:
|
|
if err.errno == errno.EPERM:
|
|
return True
|
|
return False
|
|
|
|
|
|
def write(message, colour=NORMAL, stream=sys.stdout):
|
|
# Lets check if we're writing to a TTY before colouring
|
|
should_colour = False
|
|
try:
|
|
should_colour = stream.isatty()
|
|
except AttributeError:
|
|
# Just in case `isatty` isn't defined on everything. The python
|
|
# docs are incredibly vague.
|
|
pass
|
|
|
|
if not should_colour:
|
|
stream.write(message + "\n")
|
|
else:
|
|
stream.write(colour + message + NORMAL + "\n")
|
|
|
|
|
|
def abort(message, colour=RED, stream=sys.stderr):
|
|
write(message, colour, stream)
|
|
sys.exit(1)
|
|
|
|
|
|
def start(configfile: str, daemonize: bool = True) -> bool:
|
|
"""Attempts to start synapse.
|
|
Args:
|
|
configfile: path to a yaml synapse config file
|
|
daemonize: whether to daemonize synapse or keep it attached to the current
|
|
session
|
|
|
|
Returns:
|
|
True if the process started successfully
|
|
False if there was an error starting the process
|
|
|
|
If deamonize is False it will only return once synapse exits.
|
|
"""
|
|
|
|
write("Starting ...")
|
|
args = SYNAPSE
|
|
|
|
if daemonize:
|
|
args.extend(["--daemonize", "-c", configfile])
|
|
else:
|
|
args.extend(["-c", configfile])
|
|
|
|
try:
|
|
subprocess.check_call(args)
|
|
write("started synapse.app.homeserver(%r)" % (configfile,), colour=GREEN)
|
|
return True
|
|
except subprocess.CalledProcessError as e:
|
|
write(
|
|
"error starting (exit code: %d); see above for logs" % e.returncode,
|
|
colour=RED,
|
|
)
|
|
return False
|
|
|
|
|
|
def start_worker(app: str, configfile: str, worker_configfile: str) -> bool:
|
|
"""Attempts to start a synapse worker.
|
|
Args:
|
|
app: name of the worker's appservice
|
|
configfile: path to a yaml synapse config file
|
|
worker_configfile: path to worker specific yaml synapse file
|
|
|
|
Returns:
|
|
True if the process started successfully
|
|
False if there was an error starting the process
|
|
"""
|
|
|
|
args = [
|
|
sys.executable,
|
|
"-B",
|
|
"-m",
|
|
app,
|
|
"-c",
|
|
configfile,
|
|
"-c",
|
|
worker_configfile,
|
|
"--daemonize",
|
|
]
|
|
|
|
try:
|
|
subprocess.check_call(args)
|
|
write("started %s(%r)" % (app, worker_configfile), colour=GREEN)
|
|
return True
|
|
except subprocess.CalledProcessError as e:
|
|
write(
|
|
"error starting %s(%r) (exit code: %d); see above for logs"
|
|
% (app, worker_configfile, e.returncode),
|
|
colour=RED,
|
|
)
|
|
return False
|
|
|
|
|
|
def stop(pidfile: str, app: str) -> bool:
|
|
"""Attempts to kill a synapse worker from the pidfile.
|
|
Args:
|
|
pidfile: path to file containing worker's pid
|
|
app: name of the worker's appservice
|
|
|
|
Returns:
|
|
True if the process stopped successfully
|
|
False if process was already stopped or an error occured
|
|
"""
|
|
|
|
if os.path.exists(pidfile):
|
|
pid = int(open(pidfile).read())
|
|
try:
|
|
os.kill(pid, signal.SIGTERM)
|
|
write("stopped %s" % (app,), colour=GREEN)
|
|
return True
|
|
except OSError as err:
|
|
if err.errno == errno.ESRCH:
|
|
write("%s not running" % (app,), colour=YELLOW)
|
|
elif err.errno == errno.EPERM:
|
|
abort("Cannot stop %s: Operation not permitted" % (app,))
|
|
else:
|
|
abort("Cannot stop %s: Unknown error" % (app,))
|
|
return False
|
|
else:
|
|
write(
|
|
"No running worker of %s found (from %s)\nThe process might be managed by another controller (e.g. systemd)"
|
|
% (app, pidfile),
|
|
colour=YELLOW,
|
|
)
|
|
return False
|
|
|
|
|
|
Worker = collections.namedtuple(
|
|
"Worker", ["app", "configfile", "pidfile", "cache_factor", "cache_factors"]
|
|
)
|
|
|
|
|
|
def main():
|
|
|
|
parser = argparse.ArgumentParser()
|
|
|
|
parser.add_argument(
|
|
"action",
|
|
choices=["start", "stop", "restart"],
|
|
help="whether to start, stop or restart the synapse",
|
|
)
|
|
parser.add_argument(
|
|
"configfile",
|
|
nargs="?",
|
|
default="homeserver.yaml",
|
|
help="the homeserver config file. Defaults to homeserver.yaml. May also be"
|
|
" a directory with *.yaml files",
|
|
)
|
|
parser.add_argument(
|
|
"-w", "--worker", metavar="WORKERCONFIG", help="start or stop a single worker"
|
|
)
|
|
parser.add_argument(
|
|
"-a",
|
|
"--all-processes",
|
|
metavar="WORKERCONFIGDIR",
|
|
help="start or stop all the workers in the given directory"
|
|
" and the main synapse process",
|
|
)
|
|
parser.add_argument(
|
|
"--no-daemonize",
|
|
action="store_false",
|
|
dest="daemonize",
|
|
help="Run synapse in the foreground for debugging. "
|
|
"Will work only if the daemonize option is not set in the config.",
|
|
)
|
|
|
|
options = parser.parse_args()
|
|
|
|
if options.worker and options.all_processes:
|
|
write('Cannot use "--worker" with "--all-processes"', stream=sys.stderr)
|
|
sys.exit(1)
|
|
if not options.daemonize and options.all_processes:
|
|
write('Cannot use "--no-daemonize" with "--all-processes"', stream=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
configfile = options.configfile
|
|
|
|
if not os.path.exists(configfile):
|
|
write(
|
|
"No config file found\n"
|
|
"To generate a config file, run '%s -c %s --generate-config"
|
|
" --server-name=<server name> --report-stats=<yes/no>'\n"
|
|
% (" ".join(SYNAPSE), options.configfile),
|
|
stream=sys.stderr,
|
|
)
|
|
sys.exit(1)
|
|
|
|
config_files = find_config_files([configfile])
|
|
config = {}
|
|
for config_file in config_files:
|
|
with open(config_file) as file_stream:
|
|
yaml_config = yaml.safe_load(file_stream)
|
|
if yaml_config is not None:
|
|
config.update(yaml_config)
|
|
|
|
pidfile = config["pid_file"]
|
|
cache_factor = config.get("synctl_cache_factor")
|
|
start_stop_synapse = True
|
|
|
|
if cache_factor:
|
|
os.environ["SYNAPSE_CACHE_FACTOR"] = str(cache_factor)
|
|
|
|
cache_factors = config.get("synctl_cache_factors", {})
|
|
for cache_name, factor in cache_factors.items():
|
|
os.environ["SYNAPSE_CACHE_FACTOR_" + cache_name.upper()] = str(factor)
|
|
|
|
worker_configfiles = []
|
|
if options.worker:
|
|
start_stop_synapse = False
|
|
worker_configfile = options.worker
|
|
if not os.path.exists(worker_configfile):
|
|
write(
|
|
"No worker config found at %r" % (worker_configfile,), stream=sys.stderr
|
|
)
|
|
sys.exit(1)
|
|
worker_configfiles.append(worker_configfile)
|
|
|
|
if options.all_processes:
|
|
# To start the main synapse with -a you need to add a worker file
|
|
# with worker_app == "synapse.app.homeserver"
|
|
start_stop_synapse = False
|
|
worker_configdir = options.all_processes
|
|
if not os.path.isdir(worker_configdir):
|
|
write(
|
|
"No worker config directory found at %r" % (worker_configdir,),
|
|
stream=sys.stderr,
|
|
)
|
|
sys.exit(1)
|
|
worker_configfiles.extend(
|
|
sorted(glob.glob(os.path.join(worker_configdir, "*.yaml")))
|
|
)
|
|
|
|
workers = []
|
|
for worker_configfile in worker_configfiles:
|
|
with open(worker_configfile) as stream:
|
|
worker_config = yaml.safe_load(stream)
|
|
worker_app = worker_config["worker_app"]
|
|
if worker_app == "synapse.app.homeserver":
|
|
# We need to special case all of this to pick up options that may
|
|
# be set in the main config file or in this worker config file.
|
|
worker_pidfile = worker_config.get("pid_file") or pidfile
|
|
worker_cache_factor = (
|
|
worker_config.get("synctl_cache_factor") or cache_factor
|
|
)
|
|
worker_cache_factors = (
|
|
worker_config.get("synctl_cache_factors") or cache_factors
|
|
)
|
|
# The master process doesn't support using worker_* config.
|
|
for key in worker_config:
|
|
if key == "worker_app": # But we allow worker_app
|
|
continue
|
|
assert not key.startswith(
|
|
"worker_"
|
|
), "Main process cannot use worker_* config"
|
|
else:
|
|
worker_pidfile = worker_config["worker_pid_file"]
|
|
worker_cache_factor = worker_config.get("synctl_cache_factor")
|
|
worker_cache_factors = worker_config.get("synctl_cache_factors", {})
|
|
workers.append(
|
|
Worker(
|
|
worker_app,
|
|
worker_configfile,
|
|
worker_pidfile,
|
|
worker_cache_factor,
|
|
worker_cache_factors,
|
|
)
|
|
)
|
|
|
|
action = options.action
|
|
|
|
if action == "stop" or action == "restart":
|
|
has_stopped = True
|
|
for worker in workers:
|
|
if not stop(worker.pidfile, worker.app):
|
|
# A worker could not be stopped.
|
|
has_stopped = False
|
|
|
|
if start_stop_synapse:
|
|
if not stop(pidfile, "synapse.app.homeserver"):
|
|
has_stopped = False
|
|
if not has_stopped and action == "stop":
|
|
sys.exit(1)
|
|
|
|
# Wait for synapse to actually shutdown before starting it again
|
|
if action == "restart":
|
|
running_pids = []
|
|
if start_stop_synapse and os.path.exists(pidfile):
|
|
running_pids.append(int(open(pidfile).read()))
|
|
for worker in workers:
|
|
if os.path.exists(worker.pidfile):
|
|
running_pids.append(int(open(worker.pidfile).read()))
|
|
if len(running_pids) > 0:
|
|
write("Waiting for process to exit before restarting...")
|
|
for running_pid in running_pids:
|
|
while pid_running(running_pid):
|
|
time.sleep(0.2)
|
|
write("All processes exited; now restarting...")
|
|
|
|
if action == "start" or action == "restart":
|
|
error = False
|
|
if start_stop_synapse:
|
|
# Check if synapse is already running
|
|
if os.path.exists(pidfile) and pid_running(int(open(pidfile).read())):
|
|
abort("synapse.app.homeserver already running")
|
|
|
|
if not start(configfile, bool(options.daemonize)):
|
|
error = True
|
|
|
|
for worker in workers:
|
|
env = os.environ.copy()
|
|
|
|
# Skip starting a worker if its already running
|
|
if os.path.exists(worker.pidfile) and pid_running(
|
|
int(open(worker.pidfile).read())
|
|
):
|
|
print(worker.app + " already running")
|
|
continue
|
|
|
|
if worker.cache_factor:
|
|
os.environ["SYNAPSE_CACHE_FACTOR"] = str(worker.cache_factor)
|
|
|
|
for cache_name, factor in worker.cache_factors.items():
|
|
os.environ["SYNAPSE_CACHE_FACTOR_" + cache_name.upper()] = str(factor)
|
|
|
|
if not start_worker(worker.app, configfile, worker.configfile):
|
|
error = True
|
|
|
|
# Reset env back to the original
|
|
os.environ.clear()
|
|
os.environ.update(env)
|
|
|
|
if error:
|
|
exit(1)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|