238 lines
8.3 KiB
Python
Executable File
238 lines
8.3 KiB
Python
Executable File
#!/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 Scheduler(zuul.cmd.ZuulApp):
|
|
def __init__(self):
|
|
super(Scheduler, 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('-d', dest='nodaemon', action='store_true',
|
|
help='do not run as a daemon')
|
|
parser.add_argument('-t', dest='validate', action='store_true',
|
|
help='validate config file syntax (Does not'
|
|
'validate config repo validity)')
|
|
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.log.debug("Reconfiguration triggered")
|
|
self.read_config()
|
|
self.setup_logging('zuul', 'log_config')
|
|
try:
|
|
self.sched.reconfigure(self.config)
|
|
except Exception:
|
|
self.log.exception("Reconfiguration failed:")
|
|
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):
|
|
# See comment at top of file about zuul imports
|
|
import zuul.scheduler
|
|
import zuul.launcher.client
|
|
|
|
logging.basicConfig(level=logging.DEBUG)
|
|
try:
|
|
self.sched = zuul.scheduler.Scheduler(self.config,
|
|
testonly=True)
|
|
except Exception as e:
|
|
self.log.error("%s" % e)
|
|
return -1
|
|
return 0
|
|
|
|
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 zuul.lib.gearserver
|
|
statsd_host = os.environ.get('STATSD_HOST')
|
|
statsd_port = int(os.environ.get('STATSD_PORT', 8125))
|
|
if self.config.has_option('gearman_server', 'listen_address'):
|
|
host = self.config.get('gearman_server', 'listen_address')
|
|
else:
|
|
host = None
|
|
zuul.lib.gearserver.GearServer(4730,
|
|
host=host,
|
|
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.client
|
|
import zuul.merger.client
|
|
import zuul.nodepool
|
|
import zuul.lib.swift
|
|
import zuul.webapp
|
|
import zuul.rpclistener
|
|
import zuul.zk
|
|
|
|
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.Scheduler")
|
|
|
|
self.sched = zuul.scheduler.Scheduler(self.config)
|
|
# TODO(jhesketh): Move swift into a connection?
|
|
self.swift = zuul.lib.swift.Swift(self.config)
|
|
|
|
gearman = zuul.launcher.client.LaunchClient(self.config, self.sched,
|
|
self.swift)
|
|
merger = zuul.merger.client.MergeClient(self.config, self.sched)
|
|
nodepool = zuul.nodepool.Nodepool(self.sched)
|
|
|
|
zookeeper = zuul.zk.ZooKeeper()
|
|
if self.config.has_option('zuul', 'zookeeper_hosts'):
|
|
zookeeper_hosts = self.config.get('zuul', 'zookeeper_hosts')
|
|
else:
|
|
zookeeper_hosts = '127.0.0.1:2181'
|
|
|
|
zookeeper.connect(zookeeper_hosts)
|
|
|
|
if self.config.has_option('zuul', 'status_expiry'):
|
|
cache_expiry = self.config.getint('zuul', 'status_expiry')
|
|
else:
|
|
cache_expiry = 1
|
|
|
|
if self.config.has_option('webapp', 'listen_address'):
|
|
listen_address = self.config.get('webapp', 'listen_address')
|
|
else:
|
|
listen_address = '0.0.0.0'
|
|
|
|
if self.config.has_option('webapp', 'port'):
|
|
port = self.config.getint('webapp', 'port')
|
|
else:
|
|
port = 8001
|
|
|
|
webapp = zuul.webapp.WebApp(
|
|
self.sched, port=port, cache_expiry=cache_expiry,
|
|
listen_address=listen_address)
|
|
rpc = zuul.rpclistener.RPCListener(self.config, self.sched)
|
|
|
|
self.configure_connections()
|
|
self.sched.setLauncher(gearman)
|
|
self.sched.setMerger(merger)
|
|
self.sched.setNodepool(nodepool)
|
|
self.sched.setZooKeeper(zookeeper)
|
|
|
|
self.log.info('Starting scheduler')
|
|
try:
|
|
self.sched.start()
|
|
self.sched.registerConnections(self.connections)
|
|
self.sched.reconfigure(self.config)
|
|
self.sched.resume()
|
|
except Exception:
|
|
self.log.exception("Error starting Zuul:")
|
|
# TODO(jeblair): If we had all threads marked as daemon,
|
|
# we might be able to have a nicer way of exiting here.
|
|
sys.exit(1)
|
|
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():
|
|
scheduler = Scheduler()
|
|
scheduler.parse_arguments()
|
|
|
|
scheduler.read_config()
|
|
|
|
if scheduler.args.validate:
|
|
sys.exit(scheduler.test_config())
|
|
|
|
if scheduler.config.has_option('zuul', 'pidfile'):
|
|
pid_fn = os.path.expanduser(scheduler.config.get('zuul', 'pidfile'))
|
|
else:
|
|
pid_fn = '/var/run/zuul-scheduler/zuul-scheduler.pid'
|
|
pid = pid_file_module.TimeoutPIDLockFile(pid_fn, 10)
|
|
|
|
if scheduler.args.nodaemon:
|
|
scheduler.main()
|
|
else:
|
|
with daemon.DaemonContext(pidfile=pid):
|
|
scheduler.main()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
sys.path.insert(0, '.')
|
|
main()
|