/usr/bin/lava-daemon is in lava-server 2014.09.1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | #! /usr/bin/python
# -*- coding: utf-8 -*-
#
# lava-daemon.py
#
# Copyright 2013 Linaro Limited
# Author: Neil Williams <neil.williams@linaro.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
# Daemonise support for lava-server manage scheduler, copied from
# lava-coordinator.
import os
import signal
import sys
import logging
import daemon
import daemon.pidlockfile
from logging.handlers import WatchedFileHandler
from subprocess import Popen
PIDFILE = '/var/run/lava-server.pid'
LOGFILE = '/var/log/lava-server/lava-scheduler.log'
DAEMON = '/usr/bin/lava-server'
child = None
def signal_handler(signal, frame):
global child
try:
logging.info("Closing daemon and child %d" % child.pid)
child.send_signal(signal)
child = None
sys.exit(os.EX_OK)
except Exception as e:
raise Exception('Error in signal handler: ' + str(e))
def getDaemonLogger(filePath, log_format=None, loglevel=logging.INFO):
logger = logging.getLogger()
logger.setLevel(loglevel)
try:
watchedHandler = WatchedFileHandler(filePath)
except Exception as e:
return e, None
watchedHandler.setFormatter(logging.Formatter(log_format or '%(asctime)s %(msg)s'))
logger.addHandler(watchedHandler)
return logger, watchedHandler
def main():
global child
client_logger, watched_file_handler = getDaemonLogger(LOGFILE, loglevel=logging.DEBUG)
if isinstance(client_logger, Exception):
print("Fatal error creating client_logger: " + str(client_logger))
sys.exit(os.EX_OSERR)
lockfile = daemon.pidlockfile.PIDLockFile(PIDFILE)
if (lockfile.is_locked()):
logging.error("PIDFile %s already locked" % PIDFILE)
sys.exit(os.EX_OSERR)
context = daemon.DaemonContext(
working_directory=os.getcwd(),
pidfile=lockfile,
files_preserve=[watched_file_handler.stream],
stderr=watched_file_handler.stream,
stdout=watched_file_handler.stream)
context.signal_map = {
signal.SIGTERM: signal_handler,
signal.SIGHUP: signal_handler
}
# pass the args down to the process to be run in the daemon context
args = sys.argv
args.pop(0)
args.insert(0, DAEMON)
arg_str = " ".join(args)
with context:
logging.info("Running LAVA Daemon")
child = Popen(args)
logging.debug("lava-scheduler-daemon: %s pid: %d" % (arg_str, child.pid))
child.communicate()
logging.info("Closing LAVA Daemon.")
return 0
if __name__ == '__main__':
main()
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