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123 lines
3.8 KiB
Python
123 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2017 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 gc
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import logging
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import sys
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try:
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import affinity
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except Exception:
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affinity = None
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from daemonize import Daemonize
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from synapse.util import PreserveLoggingContext
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from synapse.util.rlimit import change_resource_limit
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from twisted.internet import reactor
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def start_worker_reactor(appname, config):
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""" Run the reactor in the main process
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Daemonizes if necessary, and then configures some resources, before starting
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the reactor. Pulls configuration from the 'worker' settings in 'config'.
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Args:
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appname (str): application name which will be sent to syslog
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config (synapse.config.Config): config object
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"""
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logger = logging.getLogger(config.worker_app)
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start_reactor(
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appname,
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config.soft_file_limit,
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config.gc_thresholds,
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config.worker_pid_file,
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config.worker_daemonize,
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config.worker_cpu_affinity,
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logger,
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)
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def start_reactor(
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appname,
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soft_file_limit,
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gc_thresholds,
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pid_file,
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daemonize,
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cpu_affinity,
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logger,
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):
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""" Run the reactor in the main process
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Daemonizes if necessary, and then configures some resources, before starting
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the reactor
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Args:
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appname (str): application name which will be sent to syslog
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soft_file_limit (int):
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gc_thresholds:
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pid_file (str): name of pid file to write to if daemonize is True
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daemonize (bool): true to run the reactor in a background process
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cpu_affinity (int|None): cpu affinity mask
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logger (logging.Logger): logger instance to pass to Daemonize
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"""
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def run():
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# make sure that we run the reactor with the sentinel log context,
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# otherwise other PreserveLoggingContext instances will get confused
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# and complain when they see the logcontext arbitrarily swapping
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# between the sentinel and `run` logcontexts.
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with PreserveLoggingContext():
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logger.info("Running")
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if cpu_affinity is not None:
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if not affinity:
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quit_with_error(
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"Missing package 'affinity' required for cpu_affinity\n"
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"option\n\n"
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"Install by running:\n\n"
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" pip install affinity\n\n"
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)
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logger.info("Setting CPU affinity to %s" % cpu_affinity)
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affinity.set_process_affinity_mask(0, cpu_affinity)
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change_resource_limit(soft_file_limit)
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if gc_thresholds:
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gc.set_threshold(*gc_thresholds)
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reactor.run()
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if daemonize:
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daemon = Daemonize(
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app=appname,
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pid=pid_file,
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action=run,
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auto_close_fds=False,
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verbose=True,
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logger=logger,
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)
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daemon.start()
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else:
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run()
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def quit_with_error(error_string):
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message_lines = error_string.split("\n")
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line_length = max([len(l) for l in message_lines if len(l) < 80]) + 2
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sys.stderr.write("*" * line_length + '\n')
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for line in message_lines:
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sys.stderr.write(" %s\n" % (line.rstrip(),))
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sys.stderr.write("*" * line_length + '\n')
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sys.exit(1)
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