forked from MirrorHub/synapse
26e5abf20d
* Fix command hint to generate a config file When trying to start Synapse without a config file, it will complain and give a hint towards what command to run. This hinted command is missing the "report_stats" parameter, which is required with either yes or no value. Add this to the command. Not an ideal situation but makes the given command work without the user getting another error, even though it might be unclear what "report_stats" represents. Signed-off-by: Jason Robinson <jasonr@matrix.org>
298 lines
9.6 KiB
Python
Executable file
298 lines
9.6 KiB
Python
Executable file
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2018 New Vector Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import argparse
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import collections
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import errno
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import glob
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import os
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import os.path
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import signal
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import subprocess
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import sys
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import time
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from six import iteritems
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import yaml
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SYNAPSE = [sys.executable, "-B", "-m", "synapse.app.homeserver"]
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GREEN = "\x1b[1;32m"
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YELLOW = "\x1b[1;33m"
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RED = "\x1b[1;31m"
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NORMAL = "\x1b[m"
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def pid_running(pid):
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try:
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os.kill(pid, 0)
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return True
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except OSError as err:
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if err.errno == errno.EPERM:
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return True
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return False
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def write(message, colour=NORMAL, stream=sys.stdout):
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# Lets check if we're writing to a TTY before colouring
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should_colour = False
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try:
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should_colour = stream.isatty()
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except AttributeError:
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# Just in case `isatty` isn't defined on everything. The python
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# docs are incredibly vague.
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pass
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if not should_colour:
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stream.write(message + "\n")
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else:
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stream.write(colour + message + NORMAL + "\n")
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def abort(message, colour=RED, stream=sys.stderr):
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write(message, colour, stream)
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sys.exit(1)
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def start(configfile):
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write("Starting ...")
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args = SYNAPSE
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args.extend(["--daemonize", "-c", configfile])
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try:
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subprocess.check_call(args)
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write("started synapse.app.homeserver(%r)" % (configfile,), colour=GREEN)
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except subprocess.CalledProcessError as e:
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write(
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"error starting (exit code: %d); see above for logs" % e.returncode,
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colour=RED,
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)
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def start_worker(app, configfile, worker_configfile):
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args = [sys.executable, "-B", "-m", app, "-c", configfile, "-c", worker_configfile]
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try:
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subprocess.check_call(args)
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write("started %s(%r)" % (app, worker_configfile), colour=GREEN)
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except subprocess.CalledProcessError as e:
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write(
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"error starting %s(%r) (exit code: %d); see above for logs"
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% (app, worker_configfile, e.returncode),
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colour=RED,
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)
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def stop(pidfile, app):
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if os.path.exists(pidfile):
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pid = int(open(pidfile).read())
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try:
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os.kill(pid, signal.SIGTERM)
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write("stopped %s" % (app,), colour=GREEN)
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except OSError as err:
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if err.errno == errno.ESRCH:
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write("%s not running" % (app,), colour=YELLOW)
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elif err.errno == errno.EPERM:
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abort("Cannot stop %s: Operation not permitted" % (app,))
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else:
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abort("Cannot stop %s: Unknown error" % (app,))
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Worker = collections.namedtuple(
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"Worker", ["app", "configfile", "pidfile", "cache_factor", "cache_factors"]
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)
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"action",
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choices=["start", "stop", "restart"],
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help="whether to start, stop or restart the synapse",
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)
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parser.add_argument(
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"configfile",
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nargs="?",
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default="homeserver.yaml",
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help="the homeserver config file, defaults to homeserver.yaml",
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)
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parser.add_argument(
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"-w", "--worker", metavar="WORKERCONFIG", help="start or stop a single worker"
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)
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parser.add_argument(
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"-a",
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"--all-processes",
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metavar="WORKERCONFIGDIR",
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help="start or stop all the workers in the given directory"
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" and the main synapse process",
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)
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options = parser.parse_args()
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if options.worker and options.all_processes:
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write('Cannot use "--worker" with "--all-processes"', stream=sys.stderr)
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sys.exit(1)
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configfile = options.configfile
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if not os.path.exists(configfile):
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write(
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"No config file found\n"
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"To generate a config file, run '%s -c %s --generate-config"
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" --server-name=<server name> --report-stats=<yes/no>'\n" % (
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" ".join(SYNAPSE), options.configfile,
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),
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stream=sys.stderr,
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)
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sys.exit(1)
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with open(configfile) as stream:
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config = yaml.load(stream)
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pidfile = config["pid_file"]
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cache_factor = config.get("synctl_cache_factor")
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start_stop_synapse = True
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if cache_factor:
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os.environ["SYNAPSE_CACHE_FACTOR"] = str(cache_factor)
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cache_factors = config.get("synctl_cache_factors", {})
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for cache_name, factor in iteritems(cache_factors):
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os.environ["SYNAPSE_CACHE_FACTOR_" + cache_name.upper()] = str(factor)
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worker_configfiles = []
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if options.worker:
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start_stop_synapse = False
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worker_configfile = options.worker
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if not os.path.exists(worker_configfile):
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write(
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"No worker config found at %r" % (worker_configfile,), stream=sys.stderr
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)
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sys.exit(1)
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worker_configfiles.append(worker_configfile)
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if options.all_processes:
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# To start the main synapse with -a you need to add a worker file
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# with worker_app == "synapse.app.homeserver"
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start_stop_synapse = False
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worker_configdir = options.all_processes
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if not os.path.isdir(worker_configdir):
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write(
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"No worker config directory found at %r" % (worker_configdir,),
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stream=sys.stderr,
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)
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sys.exit(1)
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worker_configfiles.extend(
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sorted(glob.glob(os.path.join(worker_configdir, "*.yaml")))
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)
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workers = []
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for worker_configfile in worker_configfiles:
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with open(worker_configfile) as stream:
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worker_config = yaml.load(stream)
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worker_app = worker_config["worker_app"]
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if worker_app == "synapse.app.homeserver":
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# We need to special case all of this to pick up options that may
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# be set in the main config file or in this worker config file.
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worker_pidfile = worker_config.get("pid_file") or pidfile
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worker_cache_factor = (
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worker_config.get("synctl_cache_factor") or cache_factor
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)
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worker_cache_factors = (
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worker_config.get("synctl_cache_factors") or cache_factors
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)
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daemonize = worker_config.get("daemonize") or config.get("daemonize")
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assert daemonize, "Main process must have daemonize set to true"
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# The master process doesn't support using worker_* config.
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for key in worker_config:
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if key == "worker_app": # But we allow worker_app
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continue
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assert not key.startswith(
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"worker_"
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), "Main process cannot use worker_* config"
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else:
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worker_pidfile = worker_config["worker_pid_file"]
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worker_daemonize = worker_config["worker_daemonize"]
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assert worker_daemonize, "In config %r: expected '%s' to be True" % (
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worker_configfile,
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"worker_daemonize",
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)
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worker_cache_factor = worker_config.get("synctl_cache_factor")
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worker_cache_factors = worker_config.get("synctl_cache_factors", {})
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workers.append(
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Worker(
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worker_app,
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worker_configfile,
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worker_pidfile,
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worker_cache_factor,
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worker_cache_factors,
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)
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)
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action = options.action
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if action == "stop" or action == "restart":
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for worker in workers:
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stop(worker.pidfile, worker.app)
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if start_stop_synapse:
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stop(pidfile, "synapse.app.homeserver")
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# Wait for synapse to actually shutdown before starting it again
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if action == "restart":
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running_pids = []
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if start_stop_synapse and os.path.exists(pidfile):
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running_pids.append(int(open(pidfile).read()))
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for worker in workers:
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if os.path.exists(worker.pidfile):
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running_pids.append(int(open(worker.pidfile).read()))
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if len(running_pids) > 0:
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write("Waiting for process to exit before restarting...")
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for running_pid in running_pids:
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while pid_running(running_pid):
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time.sleep(0.2)
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write("All processes exited; now restarting...")
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if action == "start" or action == "restart":
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if start_stop_synapse:
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# Check if synapse is already running
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if os.path.exists(pidfile) and pid_running(int(open(pidfile).read())):
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abort("synapse.app.homeserver already running")
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start(configfile)
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for worker in workers:
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env = os.environ.copy()
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if worker.cache_factor:
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os.environ["SYNAPSE_CACHE_FACTOR"] = str(worker.cache_factor)
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for cache_name, factor in iteritems(worker.cache_factors):
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os.environ["SYNAPSE_CACHE_FACTOR_" + cache_name.upper()] = str(factor)
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start_worker(worker.app, configfile, worker.configfile)
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# Reset env back to the original
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os.environ.clear()
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os.environ.update(env)
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if __name__ == "__main__":
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main()
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