275 lines
9.8 KiB
Python
Executable File
275 lines
9.8 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright 2012 Hewlett-Packard Development Company, L.P.
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# Copyright 2013 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 ConfigParser
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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 logging.config
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import os
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import sys
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import signal
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import traceback
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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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def stack_dump_handler(signum, frame):
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signal.signal(signal.SIGUSR2, signal.SIG_IGN)
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log_str = ""
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for thread_id, stack_frame in sys._current_frames().items():
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log_str += "Thread: %s\n" % thread_id
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log_str += "".join(traceback.format_stack(stack_frame))
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log = logging.getLogger("zuul.stack_dump")
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log.debug(log_str)
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signal.signal(signal.SIGUSR2, stack_dump_handler)
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class Server(object):
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def __init__(self):
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self.args = None
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self.config = None
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self.gear_server_pid = None
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def parse_arguments(self):
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parser = argparse.ArgumentParser(description='Project gating system.')
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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('-l', dest='layout',
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help='specify the layout 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('-t', dest='validate', nargs='?', const=True,
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metavar='JOB_LIST',
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help='validate layout file syntax (optionally '
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'providing the path to a file with a list of '
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'available job names)')
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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 _get_version(self):
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from zuul.version import version_info as zuul_version_info
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return "Zuul version: %s" % zuul_version_info.version_string()
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def read_config(self):
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self.config = ConfigParser.ConfigParser()
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if self.args.config:
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locations = [self.args.config]
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else:
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locations = ['/etc/zuul/zuul.conf',
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'~/zuul.conf']
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for fp in locations:
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if os.path.exists(os.path.expanduser(fp)):
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self.config.read(os.path.expanduser(fp))
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return
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raise Exception("Unable to locate config file in %s" % locations)
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def setup_logging(self, section, parameter):
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if self.config.has_option(section, parameter):
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fp = os.path.expanduser(self.config.get(section, parameter))
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if not os.path.exists(fp):
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raise Exception("Unable to read logging config file at %s" %
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fp)
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logging.config.fileConfig(fp)
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else:
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logging.basicConfig(level=logging.DEBUG)
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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.read_config()
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self.setup_logging('zuul', 'log_config')
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self.sched.reconfigure(self.config)
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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.sched.exit()
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self.sched.join()
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self.stop_gear_server()
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def term_handler(self, signum, frame):
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self.stop_gear_server()
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os._exit(0)
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def test_config(self, job_list_path):
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# See comment at top of file about zuul imports
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import zuul.scheduler
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import zuul.launcher.gearman
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import zuul.trigger.gerrit
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logging.basicConfig(level=logging.DEBUG)
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self.sched = zuul.scheduler.Scheduler()
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self.sched.registerReporter(None, 'gerrit')
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self.sched.registerReporter(None, 'smtp')
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self.sched.registerTrigger(None, 'gerrit')
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self.sched.registerTrigger(None, 'timer')
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layout = self.sched.testConfig(self.config.get('zuul',
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'layout_config'))
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if not job_list_path:
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return False
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failure = False
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path = os.path.expanduser(job_list_path)
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if not os.path.exists(path):
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raise Exception("Unable to find job list: %s" % path)
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jobs = set()
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for line in open(path):
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v = line.strip()
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if v:
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jobs.add(v)
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for job in sorted(layout.jobs):
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if job not in jobs:
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print "Job %s not defined" % job
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failure = True
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return failure
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def start_gear_server(self):
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pipe_read, pipe_write = os.pipe()
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child_pid = os.fork()
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if child_pid == 0:
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os.close(pipe_write)
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self.setup_logging('gearman_server', 'log_config')
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import gear
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statsd_host = os.environ.get('STATSD_HOST')
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statsd_port = int(os.environ.get('STATSD_PORT', 8125))
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gear.Server(4730,
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statsd_host=statsd_host,
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statsd_port=statsd_port,
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statsd_prefix='zuul.geard')
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# Keep running until the parent dies:
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pipe_read = os.fdopen(pipe_read)
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pipe_read.read()
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os._exit(0)
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else:
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os.close(pipe_read)
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self.gear_server_pid = child_pid
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self.gear_pipe_write = pipe_write
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def stop_gear_server(self):
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if self.gear_server_pid:
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os.kill(self.gear_server_pid, signal.SIGKILL)
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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.scheduler
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import zuul.launcher.gearman
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import zuul.merger.client
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import zuul.reporter.gerrit
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import zuul.reporter.smtp
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import zuul.trigger.gerrit
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import zuul.trigger.timer
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import zuul.webapp
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import zuul.rpclistener
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if (self.config.has_option('gearman_server', 'start') and
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self.config.getboolean('gearman_server', 'start')):
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self.start_gear_server()
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self.setup_logging('zuul', 'log_config')
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self.log = logging.getLogger("zuul.Server")
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self.sched = zuul.scheduler.Scheduler()
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gearman = zuul.launcher.gearman.Gearman(self.config, self.sched)
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merger = zuul.merger.client.MergeClient(self.config, self.sched)
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gerrit = zuul.trigger.gerrit.Gerrit(self.config, self.sched)
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timer = zuul.trigger.timer.Timer(self.config, self.sched)
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webapp = zuul.webapp.WebApp(self.sched)
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rpc = zuul.rpclistener.RPCListener(self.config, self.sched)
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gerrit_reporter = zuul.reporter.gerrit.Reporter(gerrit)
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smtp_reporter = zuul.reporter.smtp.Reporter(
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self.config.get('smtp', 'default_from')
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if self.config.has_option('smtp', 'default_from') else 'zuul',
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self.config.get('smtp', 'default_to')
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if self.config.has_option('smtp', 'default_to') else 'zuul',
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self.config.get('smtp', 'server')
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if self.config.has_option('smtp', 'server') else 'localhost',
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self.config.get('smtp', 'port')
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if self.config.has_option('smtp', 'port') else 25
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)
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self.sched.setLauncher(gearman)
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self.sched.setMerger(merger)
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self.sched.registerTrigger(gerrit)
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self.sched.registerTrigger(timer)
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self.sched.registerReporter(gerrit_reporter)
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self.sched.registerReporter(smtp_reporter)
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self.log.info('Starting scheduler')
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self.sched.start()
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self.sched.reconfigure(self.config)
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self.sched.resume()
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self.log.info('Starting Webapp')
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webapp.start()
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self.log.info('Starting RPC')
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rpc.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, stack_dump_handler)
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signal.signal(signal.SIGTERM, self.term_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 scheduler to exit nicely...\n"
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self.exit_handler(signal.SIGINT, None)
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def main():
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server = Server()
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server.parse_arguments()
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server.read_config()
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if server.args.layout:
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server.config.set('zuul', 'layout_config', server.args.layout)
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if server.args.validate:
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path = server.args.validate
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if path is True:
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path = None
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sys.exit(server.test_config(path))
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if server.config.has_option('zuul', 'pidfile'):
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pid_fn = os.path.expanduser(server.config.get('zuul', 'pidfile'))
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else:
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pid_fn = '/var/run/zuul/zuul.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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