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#!/usr/bin/perl -w
#
# Copyright (C) 2009 Branislav Bozgai
#
# Munin plugin to monitor ZyXel ZyWall series routers RAM utilization.
# Based on snmp__if_ 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.
#%# 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 1.3.6.1.4.1.890.1.6.1.1.3.0 \n";
exit 0;
}
if ($0 =~ /^(?:|.*\/)snmp_zyxel_zywall_([^_]+)_ram$/)
{
$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.";
}
my $sysRAMUsage = "1.3.6.1.4.1.890.1.6.1.1.3.0";
my ($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 = $session->get_request($sysRAMUsage)))
{
die "Croaking: " . $session->error();
}
print "graph_title RAM usage\n";
print "graph_category system\n";
print "graph_args --base 1000 -r --lower-limit 0 --upper-limit 100\n";
print "graph_vlabel %\n";
print "graph_scale no\n";
print "graph_period second\n";
print "graph_info RAM usage\n";
print "sysRAMUsage.label RAM Usage\n";
print "sysRAMUsage.draw AREA\n";
exit 0;
}
if (defined ($response = $session->get_request($sysRAMUsage)))
{
print "sysRAMUsage.value ", $response->{$sysRAMUsage}, "\n";
}
else
{
print "sysRAMUsage.value U\n";
}
# vim:syntax=perl