Munin contributed plugins

#!/usr/bin/perl -w

#

# Copyright (C) 2008 J.M.Roth

#

# 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.

#

#

# $Log$

#

# Inspired by snmp__processes

#

#%# 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 $iface     = $ENV{interface} || undef;

my $response;

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

{

	print "require 1.3.6.1.2.1.25.2.3.1.5.2\n"; # Number

	print "require 1.3.6.1.2.1.25.2.3.1.6.2\n"; # Number

	exit 0;

}

my @split_result = split(/_/, $0);

$host = $split_result[1];

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

{

    $host = $1;

    $port = $2;

}

if ($host eq '' || !defined $host)

{

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

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

}

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

		-hostname  => $host,

		-community => $community,

		-port      => $port

	);

if (!defined ($session))

{

	die "Croaking: $error";

}

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

{

	print "host_name $host\n";

	print "graph_title Memory usage

graph_args --base 1000 -l 0 

graph_vlabel kB

graph_category system

graph_info This graph shows total and used memory on the host.

memsize.label total

memused.label used

memsize.info The total memory.

memused.info The memory in use.

memsize.draw LINE1

memused.draw LINE2

";

	exit 0;

}

print "memsize.value ", &get_single ($session, "1.3.6.1.2.1.25.2.3.1.5.2"), "\n";

print "memused.value ", &get_single ($session, "1.3.6.1.2.1.25.2.3.1.6.2"), "\n";

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};

	}

}