Munin contributed plugins

#!/usr/bin/perl -w

##

## Copyright (C) 2007 OZ

##

## interface-traffic including warnlevels, based on snmp__if_.

##

## supports entries for maximum bitrates in

## /etc/munin/plugin-conf.d/munin-node like:

## [snmp_<hostname>_if_*]

## env.levelwarn 800000

## env.levelcrit 1000000

##

## 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.

##

## Revision 0.1  2007/01/18 15:00:00  oz

#

#%# 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 "number  1.3.6.1.2.1.2.1.0\n";

	print "index   1.3.6.1.2.1.2.2.1.1.\n";

	print "require 1.3.6.1.2.1.2.2.1.3. ^(6|23)\$\n"; # Type

	print "require 1.3.6.1.2.1.2.2.1.5. [1-9]\n"; # Speed

	exit 0;

}

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

{

	$host  = $1;

	$iface = $2;

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

	{

		$host = $1;

		$port = $2;

	}

}

elsif (!defined($host))

{

	print "# Debug: $0 -- $1 -- $2\n" if $DEBUG;

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

}

my $ifEntryDescr     = "1.3.6.1.2.1.2.2.1.2.$iface"; 

my $ifEntrySpeed     = "1.3.6.1.2.1.2.2.1.5.$iface";

my $ifEntryStatus    = "1.3.6.1.2.1.2.2.1.8.$iface";

my $ifEntryInOctets  = "1.3.6.1.2.1.2.2.1.10.$iface";

my $ifEntryOutOctets = "1.3.6.1.2.1.2.2.1.16.$iface";

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

		-hostname  => $host,

		-community => $community,

		-port      => $port

	);

if (!defined ($session))

{

	die "Croaking: $error";

}

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

{

	print "host_name $host\n";

	if (!defined ($response = $session->get_request($ifEntryDescr)))

	{

		die "Croaking: " . $session->error();

	}

	my $name = $response->{$ifEntryDescr};

	$name =~ s/[^\w\s]//g;

	my $warn = undef;

	if (defined ($response = $session->get_request($ifEntrySpeed)))

	{

		$warn = $response->{$ifEntrySpeed}/8;

	}

	my $levelwarn=undef;

	$levelwarn=$ENV{levelwarn} if defined($ENV{levelwarn});

	my $levelcrit=undef;

	$levelcrit=$ENV{levelcrit} if defined($ENV{levelcrit});

	if (length ($name) > 15)

	{

		print "graph_title Interface $iface traffic\n";

	}

	else

	{

		print "graph_title Interface $name traffic\n";

	}

	print "graph_order recv send\n";

	print "graph_args --base 1000\n";

	print "graph_vlabel bits in (-) / out (+) per \${graph_period}\n";

	print "graph_category network\n";

	print "graph_info This graph shows traffic for the \"$name\" network interface.\n";

	print "send.info Bits sent/received by this interface.\n";

	print "recv.label recv\n";

	print "recv.type DERIVE\n";

	print "recv.graph no\n";

	print "recv.cdef recv,8,*\n";

	print "recv.max 2000000000\n";

	print "recv.min 0\n";

	print "recv.warn ", (-$warn), "\n" if defined $warn;

	print "recv.warning $levelwarn\n" if defined $levelwarn;

	print "recv.critical $levelcrit\n" if defined $levelcrit;

	print "send.label bps\n";

	print "send.type DERIVE\n";

	print "send.negative recv\n";

	print "send.cdef send,8,*\n";

	print "send.max 2000000000\n";

	print "send.min 0\n";

	print "send.warn $warn\n" if defined $warn;

	print "send.warning $levelwarn\n" if defined $levelwarn;

	print "send.critical $levelcrit\n" if defined $levelcrit;

	exit 0; 

}

my $status = 1;

if (defined ($response = $session->get_request($ifEntryStatus)))

{

	$status = $response->{$ifEntryStatus};

}

if ($status == 2)

{

	print "recv.value U\n";

	print "send.value U\n";

	exit 0;

}

if (defined ($response = $session->get_request($ifEntryInOctets)))

{

	print "recv.value ", $response->{$ifEntryInOctets}, "\n";

}

else

{

	print "recv.value U\n";

}

if (defined ($response = $session->get_request($ifEntryOutOctets)))

{

	print "send.value ", $response->{$ifEntryOutOctets}, "\n";

}

else

{

	print "send.value U\n";

}