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#!/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 configparser
import daemon
import extras
import io
import logging
import logging.config
import os
import signal
import socket
import sys
import traceback
import threading
yappi = extras.try_import('yappi')
objgraph = extras.try_import('objgraph')
# 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'])
from zuul.ansible import logconfig
import zuul.lib.connections
from zuul.lib.config import get_default
# Do not import modules that will 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.
def stack_dump_handler(signum, frame):
signal.signal(signal.SIGUSR2, signal.SIG_IGN)
log = logging.getLogger("zuul.stack_dump")
log.debug("Beginning debug handler")
try:
threads = {}
for t in threading.enumerate():
threads[t.ident] = t
log_str = ""
for thread_id, stack_frame in sys._current_frames().items():
thread = threads.get(thread_id)
if thread:
thread_name = thread.name
else:
thread_name = thread.ident
log_str += "Thread: %s %s\n" % (thread_id, thread_name)
log_str += "".join(traceback.format_stack(stack_frame))
log.debug(log_str)
except Exception:
log.exception("Thread dump error:")
try:
if yappi:
if not yappi.is_running():
log.debug("Starting Yappi")
yappi.start()
else:
log.debug("Stopping Yappi")
yappi.stop()
yappi_out = io.StringIO()
yappi.get_func_stats().print_all(out=yappi_out)
yappi.get_thread_stats().print_all(out=yappi_out)
log.debug(yappi_out.getvalue())
yappi_out.close()
yappi.clear_stats()
except Exception:
log.exception("Yappi error:")
try:
if objgraph:
log.debug("Most common types:")
objgraph_out = io.StringIO()
objgraph.show_growth(limit=100, file=objgraph_out)
log.debug(objgraph_out.getvalue())
objgraph_out.close()
except Exception:
log.exception("Objgraph error:")
log.debug("End debug handler")
signal.signal(signal.SIGUSR2, stack_dump_handler)
class ZuulApp(object):
app_name = None # type: str
app_description = None # type: str
def __init__(self):
self.args = None
self.config = None
self.connections = {}
def _get_version(self):
from zuul.version import version_info as zuul_version_info
return "Zuul version: %s" % zuul_version_info.release_string()
def createParser(self):
parser = argparse.ArgumentParser(description=self.app_description)
parser.add_argument('-c', dest='config',
help='specify the config file')
parser.add_argument('--version', dest='version', action='version',
version=self._get_version(),
help='show zuul version')
return parser
def parseArguments(self, args=None):
parser = self.createParser()
self.args = parser.parse_args(args)
return parser
def readConfig(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, section, parameter):
if self.config.has_option(section, parameter):
fp = os.path.expanduser(self.config.get(section, parameter))
logging_config = logconfig.load_config(fp)
else:
# If someone runs in the foreground and doesn't give a logging
# config, leave the config set to emit to stdout.
if hasattr(self.args, 'nodaemon') and self.args.nodaemon:
logging_config = logconfig.ServerLoggingConfig()
logging_config.setDebug()
else:
# Setting a server value updates the defaults to use
# WatchedFileHandler on /var/log/zuul/{server}-debug.log
# and /var/log/zuul/{server}.log
logging_config = logconfig.ServerLoggingConfig(server=section)
logging_config.apply()
def configure_connections(self, source_only=False):
self.connections = zuul.lib.connections.ConnectionRegistry()
self.connections.configure(self.config, source_only)
class ZuulDaemonApp(ZuulApp):
def createParser(self):
parser = super(ZuulDaemonApp, self).createParser()
parser.add_argument('-d', dest='nodaemon', action='store_true',
help='do not run as a daemon')
return parser
def getPidFile(self):
pid_fn = get_default(self.config, self.app_name, 'pidfile',
'/var/run/zuul/%s.pid' % self.app_name,
expand_user=True)
return pid_fn
def main(self):
self.parseArguments()
self.readConfig()
pid_fn = self.getPidFile()
pid = pid_file_module.TimeoutPIDLockFile(pid_fn, 10)
if self.args.nodaemon:
self.run()
else:
# Exercise the pidfile before we do anything else (including
# logging or daemonizing)
with daemon.DaemonContext(pidfile=pid):
pass
with daemon.DaemonContext(pidfile=pid):
self.run()
def send_command(self, cmd):
command_socket = get_default(
self.config, self.app_name, 'command_socket',
'/var/lib/zuul/%s.socket' % self.app_name)
s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s.connect(command_socket)
cmd = '%s\n' % cmd
s.sendall(cmd.encode('utf8'))
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