| #!/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, args=None): |
| 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(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.executor.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 |
| if self.config.has_option('gearman_server', 'ssl_key'): |
| ssl_key = self.config.get('gearman_server', 'ssl_key') |
| else: |
| ssl_key = None |
| if self.config.has_option('gearman_server', 'ssl_cert'): |
| ssl_cert = self.config.get('gearman_server', 'ssl_cert') |
| else: |
| ssl_cert = None |
| if self.config.has_option('gearman_server', 'ssl_ca'): |
| ssl_ca = self.config.get('gearman_server', 'ssl_ca') |
| else: |
| ssl_ca = None |
| zuul.lib.gearserver.GearServer(4730, |
| ssl_key=ssl_key, |
| ssl_cert=ssl_cert, |
| ssl_ca=ssl_ca, |
| 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.executor.client |
| import zuul.merger.client |
| import zuul.nodepool |
| 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) |
| |
| gearman = zuul.executor.client.ExecutorClient(self.config, self.sched) |
| 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.setExecutor(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, webapp) |
| 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() |