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# Copyright 2012 Hewlett-Packard Development Company, L.P.
# Copyright 2013-2014 OpenStack Foundation
# Copyright 2021-2022 Acme Gating, LLC
#
# 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 zuul.cmd
import zuul.executor.server
from zuul.lib.config import get_default
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')
self.addSubCommands(parser, zuul.executor.server.COMMANDS)
return parser
def parseArguments(self, args=None):
super(Executor, self).parseArguments()
def exit_handler(self, signum, frame):
if self.config.has_option('executor', 'sigterm_method'):
graceful = self.config.get('executor', 'sigterm_method')
else:
graceful = 'graceful'
if graceful.lower() == 'graceful':
self.executor.graceful()
elif graceful.lower() == 'stop':
self.executor.stop()
else:
self.log.error("Unknown value for executor.sigterm_method:"
f"'{graceful}'. Expected 'graceful' or 'stop'")
self.executor.graceful()
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)
try:
pipe_read.read()
except KeyboardInterrupt:
pass
self.log.info("Stopping log streamer")
streamer.stop()
os._exit(0)
else:
os.close(pipe_read)
self.log_streamer_pipe = pipe_write
self.log_streamer_pid = child_pid
def run(self):
self.handleCommands()
self.configure_connections(source_only=True, check_bwrap=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 = '/var/lib/zuul/builds'
if not os.path.exists(self.job_dir):
os.mkdir(self.job_dir)
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()
if self.args.nodaemon:
signal.signal(signal.SIGTERM, self.exit_handler)
while True:
try:
self.executor.join()
break
except KeyboardInterrupt:
print("Ctrl + C: asking executor to exit nicely...\n")
self.exit_handler(signal.SIGINT, None)
os.close(self.log_streamer_pipe)
os.waitpid(self.log_streamer_pid, 0)
def main():
Executor().main()
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