114 lines
3.7 KiB
Python
114 lines
3.7 KiB
Python
#!/usr/bin/env python
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# Copyright 2012 Hewlett-Packard Development Company, L.P.
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# Copyright 2013-2014 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import argparse
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import daemon
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import extras
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# as of python-daemon 1.6 it doesn't bundle pidlockfile anymore
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# instead it depends on lockfile-0.9.1 which uses pidfile.
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pid_file_module = extras.try_imports(['daemon.pidlockfile', 'daemon.pidfile'])
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import logging
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import os
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import sys
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import signal
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import zuul.cmd
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# No zuul imports here because they pull in paramiko which must not be
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# imported until after the daemonization.
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# https://github.com/paramiko/paramiko/issues/59
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# Similar situation with gear and statsd.
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class Launcher(zuul.cmd.ZuulApp):
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def parse_arguments(self):
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parser = argparse.ArgumentParser(description='Zuul launch worker.')
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parser.add_argument('-c', dest='config',
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help='specify the config file')
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parser.add_argument('-d', dest='nodaemon', action='store_true',
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help='do not run as a daemon')
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parser.add_argument('--version', dest='version', action='version',
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version=self._get_version(),
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help='show zuul version')
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self.args = parser.parse_args()
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def reconfigure_handler(self, signum, frame):
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signal.signal(signal.SIGHUP, signal.SIG_IGN)
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self.log.debug("Reconfiguration triggered")
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self.read_config()
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self.setup_logging('launcher', 'log_config')
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try:
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self.launcher.reconfigure(self.config)
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except Exception:
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self.log.exception("Reconfiguration failed:")
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signal.signal(signal.SIGHUP, self.reconfigure_handler)
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def exit_handler(self, signum, frame):
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signal.signal(signal.SIGUSR1, signal.SIG_IGN)
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self.launcher.stop()
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self.launcher.join()
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def main(self):
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# See comment at top of file about zuul imports
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import zuul.launcher.ansiblelaunchserver
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self.setup_logging('launcher', 'log_config')
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self.log = logging.getLogger("zuul.Launcher")
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LaunchServer = zuul.launcher.ansiblelaunchserver.LaunchServer
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self.launcher = LaunchServer(self.config)
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self.launcher.start()
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signal.signal(signal.SIGHUP, self.reconfigure_handler)
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signal.signal(signal.SIGUSR1, self.exit_handler)
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signal.signal(signal.SIGUSR2, zuul.cmd.stack_dump_handler)
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while True:
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try:
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signal.pause()
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except KeyboardInterrupt:
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print "Ctrl + C: asking launcher to exit nicely...\n"
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self.exit_handler(signal.SIGINT, None)
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sys.exit(0)
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def main():
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server = Launcher()
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server.parse_arguments()
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server.read_config()
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server.configure_connections()
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if server.config.has_option('launcher', 'pidfile'):
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pid_fn = os.path.expanduser(server.config.get('launcher', 'pidfile'))
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else:
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pid_fn = '/var/run/zuul-launcher/zuul-launcher.pid'
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pid = pid_file_module.TimeoutPIDLockFile(pid_fn, 10)
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if server.args.nodaemon:
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server.main()
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else:
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with daemon.DaemonContext(pidfile=pid):
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server.main()
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if __name__ == "__main__":
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sys.path.insert(0, '.')
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main()
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