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#!/usr/bin/env python
# Copyright 2012 Hewlett-Packard Development Company, L.P.
# Copyright 2013 OpenStack Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import argparse
import daemon
import extras
# as of python-daemon 1.6 it doesn't bundle pidlockfile anymore
# instead it depends on lockfile-0.9.1 which uses pidfile.
pid_file_module = extras.try_imports(['daemon.pidlockfile', 'daemon.pidfile'])
import logging
import os
import sys
import signal
import zuul.cmd
# No zuul imports here because they pull in paramiko which must not be
# imported until after the daemonization.
# https://github.com/paramiko/paramiko/issues/59
# Similar situation with gear and statsd.
class Server(zuul.cmd.ZuulApp):
def __init__(self):
super(Server, self).__init__()
self.gear_server_pid = None
def parse_arguments(self):
parser = argparse.ArgumentParser(description='Project gating system.')
parser.add_argument('-c', dest='config',
help='specify the config file')
parser.add_argument('-l', dest='layout',
help='specify the layout file')
parser.add_argument('-d', dest='nodaemon', action='store_true',
help='do not run as a daemon')
parser.add_argument('-t', dest='validate', nargs='?', const=True,
metavar='JOB_LIST',
help='validate layout file syntax (optionally '
'providing the path to a file with a list of '
'available job names)')
parser.add_argument('--version', dest='version', action='version',
version=self._get_version(),
help='show zuul version')
self.args = parser.parse_args()
def reconfigure_handler(self, signum, frame):
signal.signal(signal.SIGHUP, signal.SIG_IGN)
self.read_config()
self.setup_logging('zuul', 'log_config')
self.sched.reconfigure(self.config)
signal.signal(signal.SIGHUP, self.reconfigure_handler)
def exit_handler(self, signum, frame):
signal.signal(signal.SIGUSR1, signal.SIG_IGN)
self.sched.exit()
self.sched.join()
self.stop_gear_server()
def term_handler(self, signum, frame):
self.stop_gear_server()
os._exit(0)
def test_config(self, job_list_path):
# See comment at top of file about zuul imports
import zuul.scheduler
import zuul.launcher.gearman
import zuul.trigger.gerrit
logging.basicConfig(level=logging.DEBUG)
self.sched = zuul.scheduler.Scheduler()
self.sched.registerReporter(None, 'gerrit')
self.sched.registerReporter(None, 'smtp')
self.sched.registerTrigger(None, 'gerrit')
self.sched.registerTrigger(None, 'timer')
self.sched.registerTrigger(None, 'zuul')
layout = self.sched.testConfig(self.config.get('zuul',
'layout_config'))
if not job_list_path:
return False
failure = False
path = os.path.expanduser(job_list_path)
if not os.path.exists(path):
raise Exception("Unable to find job list: %s" % path)
jobs = set()
jobs.add('noop')
for line in open(path):
v = line.strip()
if v:
jobs.add(v)
for job in sorted(layout.jobs):
if job not in jobs:
print "Job %s not defined" % job
failure = True
return failure
def start_gear_server(self):
pipe_read, pipe_write = os.pipe()
child_pid = os.fork()
if child_pid == 0:
os.close(pipe_write)
self.setup_logging('gearman_server', 'log_config')
import gear
statsd_host = os.environ.get('STATSD_HOST')
statsd_port = int(os.environ.get('STATSD_PORT', 8125))
gear.Server(4730,
statsd_host=statsd_host,
statsd_port=statsd_port,
statsd_prefix='zuul.geard')
# Keep running until the parent dies:
pipe_read = os.fdopen(pipe_read)
pipe_read.read()
os._exit(0)
else:
os.close(pipe_read)
self.gear_server_pid = child_pid
self.gear_pipe_write = pipe_write
def stop_gear_server(self):
if self.gear_server_pid:
os.kill(self.gear_server_pid, signal.SIGKILL)
def main(self):
# See comment at top of file about zuul imports
import zuul.scheduler
import zuul.launcher.gearman
import zuul.merger.client
import zuul.lib.swift
import zuul.reporter.gerrit
import zuul.reporter.smtp
import zuul.trigger.gerrit
import zuul.trigger.timer
import zuul.trigger.zuultrigger
import zuul.webapp
import zuul.rpclistener
signal.signal(signal.SIGUSR2, zuul.cmd.stack_dump_handler)
if (self.config.has_option('gearman_server', 'start') and
self.config.getboolean('gearman_server', 'start')):
self.start_gear_server()
self.setup_logging('zuul', 'log_config')
self.log = logging.getLogger("zuul.Server")
self.sched = zuul.scheduler.Scheduler()
self.swift = zuul.lib.swift.Swift(self.config)
gearman = zuul.launcher.gearman.Gearman(self.config, self.sched,
self.swift)
merger = zuul.merger.client.MergeClient(self.config, self.sched)
gerrit = zuul.trigger.gerrit.Gerrit(self.config, self.sched)
timer = zuul.trigger.timer.Timer(self.config, self.sched)
zuultrigger = zuul.trigger.zuultrigger.ZuulTrigger(self.config, self.sched)
if self.config.has_option('zuul', 'status_expiry'):
cache_expiry = self.config.getint('zuul', 'status_expiry')
else:
cache_expiry = 1
webapp = zuul.webapp.WebApp(self.sched, cache_expiry=cache_expiry)
rpc = zuul.rpclistener.RPCListener(self.config, self.sched)
gerrit_reporter = zuul.reporter.gerrit.Reporter(gerrit)
smtp_reporter = zuul.reporter.smtp.Reporter(
self.config.get('smtp', 'default_from')
if self.config.has_option('smtp', 'default_from') else 'zuul',
self.config.get('smtp', 'default_to')
if self.config.has_option('smtp', 'default_to') else 'zuul',
self.config.get('smtp', 'server')
if self.config.has_option('smtp', 'server') else 'localhost',
self.config.get('smtp', 'port')
if self.config.has_option('smtp', 'port') else 25
)
self.sched.setLauncher(gearman)
self.sched.setMerger(merger)
self.sched.registerTrigger(gerrit)
self.sched.registerTrigger(timer)
self.sched.registerTrigger(zuultrigger)
self.sched.registerReporter(gerrit_reporter)
self.sched.registerReporter(smtp_reporter)
self.log.info('Starting scheduler')
self.sched.start()
self.sched.reconfigure(self.config)
self.sched.resume()
self.log.info('Starting Webapp')
webapp.start()
self.log.info('Starting RPC')
rpc.start()
signal.signal(signal.SIGHUP, self.reconfigure_handler)
signal.signal(signal.SIGUSR1, self.exit_handler)
signal.signal(signal.SIGTERM, self.term_handler)
while True:
try:
signal.pause()
except KeyboardInterrupt:
print "Ctrl + C: asking scheduler to exit nicely...\n"
self.exit_handler(signal.SIGINT, None)
def main():
server = Server()
server.parse_arguments()
server.read_config()
if server.args.layout:
server.config.set('zuul', 'layout_config', server.args.layout)
if server.args.validate:
path = server.args.validate
if path is True:
path = None
sys.exit(server.test_config(path))
if server.config.has_option('zuul', 'pidfile'):
pid_fn = os.path.expanduser(server.config.get('zuul', 'pidfile'))
else:
pid_fn = '/var/run/zuul/zuul.pid'
pid = pid_file_module.TimeoutPIDLockFile(pid_fn, 10)
if server.args.nodaemon:
server.main()
else:
with daemon.DaemonContext(pidfile=pid):
server.main()
if __name__ == "__main__":
sys.path.insert(0, '.')
main()
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