zuul/zuul-server

143 lines
4.7 KiB
Python
Executable File

#!/usr/bin/env python
# Copyright 2012 Hewlett-Packard Development Company, L.P.
#
# 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 ConfigParser
import daemon
try:
import daemon.pidlockfile as pid_file_module
pid_file_module # workaround for pyflakes issue #13
except:
# as of python-daemon 1.6 it doesn't bundle pidlockfile anymore
# instead it depends on lockfile-0.9.1 which uses pidfile.
import daemon.pidfile as pid_file_module
import logging.config
import os
import signal
# 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
class Server(object):
def __init__(self):
self.args = None
self.config = 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('-d', dest='nodaemon', action='store_true',
help='do not run as a daemon')
self.args = parser.parse_args()
def read_config(self):
self.config = ConfigParser.ConfigParser()
if self.args.config:
locations = [self.args.config]
else:
locations = ['/etc/zuul/zuul.conf',
'~/zuul.conf']
for fp in locations:
if os.path.exists(os.path.expanduser(fp)):
self.config.read(os.path.expanduser(fp))
return
raise Exception("Unable to locate config file in %s" % locations)
def setup_logging(self):
if self.config.has_option('zuul', 'log_config'):
fp = os.path.expanduser(self.config.get('zuul', 'log_config'))
if not os.path.exists(fp):
raise Exception("Unable to read logging config file at %s" %
fp)
logging.config.fileConfig(fp)
else:
logging.basicConfig(level=logging.DEBUG)
def reconfigure_handler(self, signum, frame):
signal.signal(signal.SIGHUP, signal.SIG_IGN)
self.read_config()
self.setup_logging()
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()
def main(self):
# See comment at top of file about zuul imports
import zuul.scheduler
import zuul.launcher.jenkins
import zuul.trigger.gerrit
self.sched = zuul.scheduler.Scheduler()
jenkins = zuul.launcher.jenkins.Jenkins(self.config, self.sched)
gerrit = zuul.trigger.gerrit.Gerrit(self.config, self.sched)
self.sched.setLauncher(jenkins)
self.sched.setTrigger(gerrit)
self.sched.start()
self.sched.reconfigure(self.config)
self.sched.resume()
signal.signal(signal.SIGHUP, self.reconfigure_handler)
signal.signal(signal.SIGUSR1, self.exit_handler)
while True:
try:
signal.pause()
except KeyboardInterrupt:
print "Ctrl + C: asking scheduler to exit nicely...\n"
self.exit_handler( signal.SIGINT, None )
if __name__ == '__main__':
server = Server()
server.parse_arguments()
server.read_config()
if server.config.has_option('zuul', 'state_dir'):
state_dir = os.path.expanduser(server.config.get('zuul', 'state_dir'))
else:
state_dir = '/var/lib/zuul'
test_fn = os.path.join(state_dir, 'test')
try:
f = open(test_fn, 'w')
f.close()
os.unlink(test_fn)
except:
print
print "Unable to write to state directory: %s" % state_dir
print
raise
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.setup_logging()
server.main()
else:
with daemon.DaemonContext(pidfile=pid):
server.setup_logging()
server.main()