140 lines
4.3 KiB
Python
140 lines
4.3 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
# Copyright [2010] [Anso Labs, 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.
|
|
|
|
"""
|
|
Base functionality for nova daemons - gradually being replaced with twistd.py.
|
|
"""
|
|
|
|
import logging
|
|
import logging.handlers
|
|
import os
|
|
import signal
|
|
import sys
|
|
import time
|
|
|
|
from nova import vendor
|
|
import daemon
|
|
from daemon import pidlockfile
|
|
|
|
from nova import flags
|
|
|
|
|
|
FLAGS = flags.FLAGS
|
|
flags.DEFINE_bool('daemonize', False, 'daemonize this process')
|
|
# NOTE(termie): right now I am defaulting to using syslog when we daemonize
|
|
# it may be better to do something else -shrug-
|
|
# NOTE(Devin): I think we should let each process have its own log file
|
|
# and put it in /var/logs/nova/(appname).log
|
|
# This makes debugging much easier and cuts down on sys log
|
|
# clutter.
|
|
flags.DEFINE_bool('use_syslog', True, 'output to syslog when daemonizing')
|
|
flags.DEFINE_string('logfile', None, 'log file to output to')
|
|
flags.DEFINE_string('pidfile', None, 'pid file to output to')
|
|
flags.DEFINE_string('working_directory', './', 'working directory...')
|
|
|
|
|
|
def stop(pidfile):
|
|
"""
|
|
Stop the daemon
|
|
"""
|
|
# Get the pid from the pidfile
|
|
try:
|
|
pf = file(pidfile,'r')
|
|
pid = int(pf.read().strip())
|
|
pf.close()
|
|
except IOError:
|
|
pid = None
|
|
|
|
if not pid:
|
|
message = "pidfile %s does not exist. Daemon not running?\n"
|
|
sys.stderr.write(message % pidfile)
|
|
return # not an error in a restart
|
|
|
|
# Try killing the daemon process
|
|
try:
|
|
while 1:
|
|
os.kill(pid, signal.SIGTERM)
|
|
time.sleep(0.1)
|
|
except OSError, err:
|
|
err = str(err)
|
|
if err.find("No such process") > 0:
|
|
if os.path.exists(pidfile):
|
|
os.remove(pidfile)
|
|
else:
|
|
print str(err)
|
|
sys.exit(1)
|
|
|
|
|
|
def serve(name, main):
|
|
argv = FLAGS(sys.argv)
|
|
|
|
if not FLAGS.pidfile:
|
|
FLAGS.pidfile = '%s.pid' % name
|
|
|
|
logging.debug("Full set of FLAGS: \n\n\n" )
|
|
for flag in FLAGS:
|
|
logging.debug("%s : %s" % (flag, FLAGS.get(flag, None) ))
|
|
|
|
action = 'start'
|
|
if len(argv) > 1:
|
|
action = argv.pop()
|
|
|
|
if action == 'stop':
|
|
stop(FLAGS.pidfile)
|
|
sys.exit()
|
|
elif action == 'restart':
|
|
stop(FLAGS.pidfile)
|
|
elif action == 'start':
|
|
pass
|
|
else:
|
|
print 'usage: %s [options] [start|stop|restart]' % argv[0]
|
|
sys.exit(1)
|
|
|
|
logging.getLogger('amqplib').setLevel(logging.WARN)
|
|
if FLAGS.daemonize:
|
|
logger = logging.getLogger()
|
|
formatter = logging.Formatter(
|
|
name + '(%(name)s): %(levelname)s %(message)s')
|
|
if FLAGS.use_syslog and not FLAGS.logfile:
|
|
syslog = logging.handlers.SysLogHandler(address='/dev/log')
|
|
syslog.setFormatter(formatter)
|
|
logger.addHandler(syslog)
|
|
else:
|
|
if not FLAGS.logfile:
|
|
FLAGS.logfile = '%s.log' % name
|
|
logfile = logging.handlers.FileHandler(FLAGS.logfile)
|
|
logfile.setFormatter(formatter)
|
|
logger.addHandler(logfile)
|
|
stdin, stdout, stderr = None, None, None
|
|
else:
|
|
stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
|
|
|
|
if FLAGS.verbose:
|
|
logging.getLogger().setLevel(logging.DEBUG)
|
|
else:
|
|
logging.getLogger().setLevel(logging.WARNING)
|
|
|
|
with daemon.DaemonContext(
|
|
detach_process=FLAGS.daemonize,
|
|
working_directory=FLAGS.working_directory,
|
|
pidfile=pidlockfile.TimeoutPIDLockFile(FLAGS.pidfile,
|
|
acquire_timeout=1,
|
|
threaded=False),
|
|
stdin=stdin,
|
|
stdout=stdout,
|
|
stderr=stderr
|
|
):
|
|
main(argv)
|