/usr/sbin/momd is in mom 0.5.1-3.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | #! /usr/bin/env python
# Memory Overcommitment Manager
# Copyright (C) 2010 Adam Litke, IBM Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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 St, Fifth Floor, Boston, MA 02110-1301 USA
import sys
import signal
import time
import os
import atexit
import re
from optparse import OptionParser
import ConfigParser
import logging
import logging.handlers
import mom
mom_instance = None
def daemonize(pid_file):
try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError, e:
sys.stderr.write("momd: fork failed: %d (%s)\n" % (e.errno, e.strerror))
sys.exit(1)
os.chdir("/")
os.setsid()
try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError, e:
sys.stderr.write("momd: fork failed: %d (%s)\n" % (e.errno, e.strerror))
sys.exit(1)
pid = str(os.getpid())
try:
file(pid_file,'w+').write("%s\n" % pid)
except EnvironmentError, e:
sys.stderr.write("momd: failed to write pid file: %d (%s)\n" %
(e.errno, e.strerror))
sys.exit(1)
atexit.register(delpid, pid_file)
sys.stdout.flush()
sys.stderr.flush()
si = file('/dev/null', 'r')
so = file('/dev/null', 'a+')
se = file('/dev/null', 'a+', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
def delpid(pid_file):
try:
os.remove(pid_file)
except OSError, e:
logger = logging.getLogger('momd')
logger.error("Unable to remove pid file (%s): %s", pid_file, e.strerror)
def signal_quit(signum, frame):
global mom_instance
logger = logging.getLogger('momd')
logger.info("Caught signal -- shutting down")
mom_instance.shutdown()
def get_option_overrides(options):
config = ConfigParser.SafeConfigParser()
config.add_section('main')
config.add_section('logging')
if options.plot_dir is not None:
config.set('main', 'plot-dir', options.plot_dir)
if options.log is not None:
config.set('logging', 'log', options.log)
if options.verbosity is not None:
config.set('logging', 'verbosity', options.verbosity)
if options.rules_file is not None:
config.set('main', 'policy', options.rules_file)
if options.policy_dir is not None:
config.set('main', 'policy-dir', options.policy_dir)
return config
def main():
global mom_instance
cmdline = OptionParser()
cmdline.add_option('-c', '--config-file', dest='config_file',
help='Load configuration from FILE', metavar='FILE',
default='/etc/mom.conf')
cmdline.add_option('-r', '--rules-file', dest='rules_file',
help='Load rules from FILE', metavar='FILE')
cmdline.add_option('-P', '--policy-dir', dest='policy_dir',
help='Load policies from DIR', metavar='DIR')
cmdline.add_option('-p', '--plot-dir', dest='plot_dir',
help='Save data plot files in DIR', metavar='DIR')
cmdline.add_option('-l', '--log', dest='log', metavar='TARGET',
help='Set the log to TARGET (stdout, or <file>')
cmdline.add_option('-v', '--verbose', dest='verbosity', metavar='LEVEL',
help='Set logging verbosity to LEVEL (0-4)')
cmdline.add_option('-d', '--daemon', action='store_true', dest='daemonize')
cmdline.add_option('', '--pid-file', dest='pid_file', metavar='FILE',
help='When running as a daemon, write pid to FILE',
default='/var/run/momd.pid')
(options, args) = cmdline.parse_args()
config_overrides = get_option_overrides(options)
if options.daemonize:
daemonize(options.pid_file)
signal.signal(signal.SIGINT, signal_quit)
signal.signal(signal.SIGTERM, signal_quit)
mom_instance = mom.MOM(options.config_file, config_overrides)
mom_instance.run()
sys.exit(0)
if __name__ == "__main__":
main()
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