#!/usr/bin/perl -w
#
# Copyright (C) 2008 Rune Nordbøe Skillingstad
#
# Plugin to monitor status in Nagios
#
# Usage: copy or link into /etc/munin/plugins
#
# Parameters:
#
#       config   (required)
#       autoconf (optional - used by munin-config)
#
# Config variables:
#
#       statuslog       - Which logfile to use
#                         Might be /var/log/nagios2/nagios.log if
#                         /var/log/nagios/status.log is missing
#
# 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; version 2 dated June,
# 1991.
#
# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
#
# $Log$
#%# family=auto
#%# capabilities=autoconf

use strict;
use warnings;

# File location may be defined with environment variable
my $NAGIOSSTAT=($ENV{'statuslog'} || '/var/log/nagios/status.log');

if ($ARGV[0]) {
  if ($ARGV[0] eq 'autoconf') {
    if (-r $NAGIOSSTAT) {
      print "yes";
    } else {
      print "no (Nagios status file not found)";
    }
    exit 0;
  } elsif ($ARGV[0] eq "config") {
    print "graph_args --base 1000 -l 0 --vertical-label Checks\n";
    print "graph_title Nagios status\n";
    print "graph_category munin\n";
    print "graph_info This graph shows how many Nagios checks are in warning or critical state.\n";
    print "graph_order hdown hunknown swarning scritical sunknown\n";
    print "hdown.label Hosts down\n";
    print "hdown.info Number of Nagios hosts in DOWN state\n";
    print "hdown.type GAUGE\n";
    print "hdown.draw AREA\n";
    print "hdown.warning 20\n";
    print "hdown.critical 25\n";
    print "hunknown.label Hosts unknown\n";
    print "hunknown.info Number of Nagios hosts in UNKNOWN state\n";
    print "hunknown.type GAUGE\n";
    print "hunknown.draw STACK\n";
    print "hunknown.warning 15\n";
    print "hunknown.critical 20\n";
    print "swarning.label Services warning\n";
    print "swarning.info Number of Nagios services in WARNING state\n";
    print "swarning.type GAUGE\n";
    print "swarning.draw LINE2\n";
    print "swarning.warning 20\n";
    print "swarning.critical 25\n";
    print "scritical.label Services critical\n";
    print "scritical.info Number of Nagios services in CRITICAL state\n";
    print "scritical.type GAUGE\n";
    print "scritical.draw LINE2\n";
    print "scritical.warning 15\n";
    print "scritical.critical 20\n";
    print "sunknown.label Services unknown\n";
    print "sunknown.info Number of Nagios services in UNKNOWN state\n";
    print "sunknown.type GAUGE\n";
    print "sunknown.draw LINE2\n";
    print "sunknown.warning 15\n";
    print "sunknown.critical 20\n";
  }
  exit 0;
}




my $HDOWN     =0;
my $HUNKNOWN  =0;
my $SWARNING  =0;
my $SCRITICAL =0;
my $SUNKNOWN  =0;

my $type = "";
my %values;

open (STATUS, $NAGIOSSTAT) or die;
while(<STATUS>) {
    chomp();
    if(/^\s+\}\s*$/) {
	$type = "";
    }

    if($type) {
	push(@{$values{$type}}, $_);
    }
    if(/^host \{/) {
	$type = "host";
    }
    if(/^service \{/) {
	$type = "service";
    }
}
close (STATUS);

$HDOWN     = grep(/current_state=1/, @{$values{'host'}});
$HUNKNOWN  = grep(/current_state=2/, @{$values{'host'}});
$SWARNING  = grep(/current_state=1/, @{$values{'service'}});
$SCRITICAL = grep(/current_state=2/, @{$values{'service'}});
$SUNKNOWN  = grep(/current_state=3/, @{$values{'service'}});

print "hdown.value $HDOWN\n";
print "hunknown.value $HUNKNOWN\n";
print "swarning.value $SWARNING\n";
print "scritical.value $SCRITICAL\n";
print "sunknown.value $SUNKNOWN\n";