The Gatekeeper, or a project gating system
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#!/usr/bin/env python
# Copyright 2012 Hewlett-Packard Development Company, L.P.
# Copyright 2013-2014 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 logging
import os
import sys
import signal
import tempfile
import zuul.cmd
import zuul.executor.server
from zuul.lib.config import get_default
# No zuul imports that pull in paramiko here; it must not be
# imported until after the daemonization.
# https://github.com/paramiko/paramiko/issues/59
# Similar situation with gear and statsd.
class Executor(zuul.cmd.ZuulDaemonApp):
app_name = 'executor'
app_description = 'A standalone Zuul executor.'
def createParser(self):
parser = super(Executor, self).createParser()
parser.add_argument('--keep-jobdir', dest='keep_jobdir',
action='store_true',
help='keep local jobdirs after run completes')
parser.add_argument('command',
choices=zuul.executor.server.COMMANDS,
nargs='?')
return parser
def parseArguments(self, args=None):
super(Executor, self).parseArguments()
if self.args.command:
self.args.nodaemon = True
def exit_handler(self):
self.executor.stop()
self.executor.join()
def start_log_streamer(self):
pipe_read, pipe_write = os.pipe()
child_pid = os.fork()
if child_pid == 0:
os.close(pipe_write)
import zuul.lib.log_streamer
self.log.info("Starting log streamer")
streamer = zuul.lib.log_streamer.LogStreamer(
'::', self.finger_port, self.job_dir)
# Keep running until the parent dies:
pipe_read = os.fdopen(pipe_read)
pipe_read.read()
self.log.info("Stopping log streamer")
streamer.stop()
os._exit(0)
else:
os.close(pipe_read)
self.log_streamer_pid = child_pid
def run(self):
if self.args.command in zuul.executor.server.COMMANDS:
self.send_command(self.args.command)
sys.exit(0)
self.configure_connections(source_only=True)
if self.config.has_option('executor', 'job_dir'):
self.job_dir = os.path.expanduser(
self.config.get('executor', 'job_dir'))
if not os.path.isdir(self.job_dir):
print("Invalid job_dir: {job_dir}".format(
job_dir=self.job_dir))
sys.exit(1)
else:
self.job_dir = tempfile.gettempdir()
self.setup_logging('executor', 'log_config')
self.log = logging.getLogger("zuul.Executor")
self.finger_port = int(
get_default(self.config, 'executor', 'finger_port',
zuul.executor.server.DEFAULT_FINGER_PORT)
)
self.start_log_streamer()
ExecutorServer = zuul.executor.server.ExecutorServer
self.executor = ExecutorServer(self.config, self.connections,
jobdir_root=self.job_dir,
keep_jobdir=self.args.keep_jobdir,
log_streaming_port=self.finger_port)
self.executor.start()
signal.signal(signal.SIGUSR2, zuul.cmd.stack_dump_handler)
if self.args.nodaemon:
while True:
try:
signal.pause()
except KeyboardInterrupt:
print("Ctrl + C: asking executor to exit nicely...\n")
self.exit_handler()
sys.exit(0)
else:
self.executor.join()
def main():
Executor().main()
if __name__ == "__main__":
main()