mom-guestd

#! /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 socket
import signal
import ConfigParser
import logging
from mom.Collectors.GuestNetworkDaemon import _Server
from mom.Collectors.Collector import *

def signal_quit(signum, frame):
    print "Received signal", signum, "shutting down."
    sys.exit(0)

def configure_logger(config):
    logger = logging.getLogger()

    verbosity = config.get('logging', 'verbosity').lower()
    if verbosity == '5' or verbosity == 'debug':
        level = logging.DEBUG
    elif verbosity == '4' or verbosity == 'info':
        level = logging.INFO
    elif verbosity == '3' or verbosity == 'warn':
        level = logging.WARN
    elif verbosity == '2' or verbosity == 'error':
        level = logging.ERROR
    elif verbosity == '1' or verbosity == 'critical':
        level = logging.CRITICAL
    else:
        level = logging.DEBUG
    logger.setLevel(level)

    log = config.get('logging', 'log')
    if log.lower() == 'stdio':
        handler = logging.StreamHandler()
    else:
        print "logging to file %s" % log
        bytes = config.getint('logging', 'max-bytes')
        backups = config.getint('logging', 'backup-count')
        handler = logging.handlers.RotatingFileHandler(log, 'a', bytes, backups)
    handler.setLevel(level)
    formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
    handler.setFormatter(formatter)
    logger.addHandler(handler)

def main():
    """
    Executable code for running a network collector server on a guest.
    """
    signal.signal(signal.SIGINT, signal_quit)
    signal.signal(signal.SIGTERM, signal_quit)

    config = ConfigParser.ConfigParser()
    config.add_section('main')
    config.set('main', 'host', '')
    config.set('main', 'port', '2187')  
    config.set('main', 'min_free', '0.20')  # These two variables
    config.set('main', 'max_free', '0.50')  #  are currently unused
    config.add_section('logging')
    config.set('logging', 'log', 'stdio')
    config.set('logging', 'verbosity', 'info')
    config.set('logging', 'max-bytes', '2097152')
    config.set('logging', 'backup-count', '5')

    configure_logger(config)
    server = _Server(config)
    server.run()

if __name__ == "__main__":
    main()