~launchpad-pqm/launchpad/devel

#!/usr/bin/python2.4

# Copyright 2007 Canonical Ltd.  All rights reserved.

"""Nagios plugin for script monitoring.

This script is needed as separate from script-monitor.py because Nagios 

only understands one line of returned text, and interprets specific

return codes as plugin statuses. These are:

    0: OK

    1: WARNING

    2: CRITICAL

    3: UNKNOWN

As such, it was felt more appropriate to separate out the scripts, 

even though there is some code duplication.

"""

__metaclass__ = type

__all__ = ['check_script']

import _pythonpath

from datetime import datetime, timedelta

from optparse import OptionParser

from time import strftime

import sys

from canonical.database.sqlbase import connect

from canonical.launchpad.scripts import db_options, logger_options, logger

from canonical.launchpad.scripts.scriptmonitor import check_script

def main():

    # XXX: Tom Haddon 2007-07-12 

    # There's a lot of untested stuff here: parsing options - 

    # this should be moved into a testable location.

    # Also duplicated code in scripts/script-monitor.py

    parser = OptionParser(

            '%prog [options] (minutes) (host:scriptname) [host:scriptname]'

            )

    db_options(parser)

    logger_options(parser)

    (options, args) = parser.parse_args()

    if len(args) < 2:

        print "Must specify time in minutes and " \

            "at least one host and script"

        return 3

    # First argument is the number of minutes into the past

    # we want to look for the scripts on the specified hosts

    try:

        minutes_ago, args = int(args[0]), args[1:]

        start_date = datetime.now() - timedelta(minutes=minutes_ago)

        completed_from = strftime("%Y-%m-%d %H:%M:%S", start_date.timetuple())

        completed_to = strftime("%Y-%m-%d %H:%M:%S", datetime.now().timetuple())

        hosts_scripts = []

        for arg in args:

            try:

                hostname, scriptname = arg.split(':')

            except TypeError:

                print "%r is not in the format 'host:scriptname'" % arg

                return 3

            hosts_scripts.append((hostname, scriptname))

    except ValueError:

        print "Must specify time in minutes and " \

            "at least one host and script"

        return 3

    log = logger(options)

    try:

        log.debug("Connecting to database")

        con = connect(options.dbuser)

        error_found = False

        msg = []

        for hostname, scriptname in hosts_scripts:

            failure_msg = check_script(con, log, hostname, 

                scriptname, completed_from, completed_to)

            if failure_msg is not None:

                msg.append("%s:%s" % (hostname, scriptname))

                error_found = True

        if error_found:

            # Construct our return message

            print "Scripts failed to run: %s" % ', '.join(msg)

            return 2

        else:

            # Construct our return message

            print "All scripts ran as expected"

            return 0

    except Exception, e:

        # Squeeze the exception type and stringification of the exception value

        # on to one line.

        print "Unhandled exception: %s %r" % (e.__class__.__name__, str(e))

        return 3

if __name__ == '__main__':

    sys.exit(main())