Munin contributed plugins

#!/usr/bin/perl -w

#

# Copyright (C) 2006 Lars Strand

#

# Munin plugin to monitor uptime by use of SNMP.

# Based on snmp__users plugin.

#

# 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=snmpauto

#%# capabilities=snmpconf

use strict;

use Net::SNMP;

my $DEBUG = 0;

my $host      = $ENV{host}      || undef;

my $port      = $ENV{port}      || 161;

my $community = $ENV{community} || "public";

my $response;

if (defined $ARGV[0] and $ARGV[0] eq "snmpconf")

{

    print "require 1.3.6.1.2.1.1.3.0 \n";

    exit 0;

}

if ($0 =~ /^(?:|.*\/)snmp_([^_]+)_uptime$/)

{

    $host  = $1;

    if ($host =~ /^([^:]+):(\d+)$/)

    {

	$host = $1;

	$port = $2;

    }

}

elsif (!defined($host))

{

    print "# Debug: $0 -- $1\n" if $DEBUG;

    die "# Error: couldn't understand what I'm supposed to monitor.";

}

if (defined $ARGV[0] and $ARGV[0] eq "config")

{

    print "host_name $host\n";

    print "graph_title Uptime

graph_category system

graph_args --base 1000 -l 0 

graph_vlabel uptime

graph_info This graph shows the uptime (in days) of the system.

uptime.label uptime

uptime.draw AREA

";

    exit 0;

}

my ($session, $error) = Net::SNMP->session(

     -hostname  => $host,

     -community => $community,

     -port      => $port,

     -translate => ['-timeticks']

    );

if (!defined ($session))

{

    die "Croaking: $error";

}

printf "uptime.value %.2f\n",  &get_single($session, "1.3.6.1.2.1.1.3.0");

sub get_single

{

    my $handle = shift;

    my $oid    = shift;

    print "# Getting single $oid...\n" if $DEBUG;

    $response = $handle->get_request($oid);

    if (!defined $response->{$oid})

    {

	return undef;

    }

    else

    {

	return (($response->{$oid}/100)/(60*60*24));

    }

}