278 lines
8.7 KiB
Python
Executable File
278 lines
8.7 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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#
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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 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 yaml
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import errno
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import time
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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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if colour == NORMAL:
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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)" %
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(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 = [
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"python", "-B",
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"-m", app,
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"-c", configfile,
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"-c", worker_configfile
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]
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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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),
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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("Worker", [
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"app", "configfile", "pidfile", "cache_factor"
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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",
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metavar="WORKERCONFIG",
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help="start or stop a single worker",
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)
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parser.add_argument(
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"-a", "--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(
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'Cannot use "--worker" with "--all-processes"',
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stream=sys.stderr
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)
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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>'\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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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,),
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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(sorted(glob.glob(
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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 = (
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worker_config.get("pid_file")
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or pidfile
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)
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worker_cache_factor = worker_config.get("synctl_cache_factor") or cache_factor
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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("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, "worker_daemonize")
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worker_cache_factor = worker_config.get("synctl_cache_factor")
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workers.append(Worker(
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worker_app, worker_configfile, worker_pidfile, worker_cache_factor,
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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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if worker.cache_factor:
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os.environ["SYNAPSE_CACHE_FACTOR"] = str(worker.cache_factor)
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start_worker(worker.app, configfile, worker.configfile)
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if cache_factor:
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os.environ["SYNAPSE_CACHE_FACTOR"] = str(cache_factor)
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else:
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os.environ.pop("SYNAPSE_CACHE_FACTOR", None)
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if __name__ == "__main__":
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main()
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