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Lars Strand 2006-11-20 13:34:52 +01:00 committed by Steve Schnepp
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commit 38422a6b81
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plugins/other/snmp__swap Executable file
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#!/usr/bin/perl -w
#
# Copyright (C) 2006 Lars Strand
#
# Munin plugin to monitor swap usage by use of SNMP.
# Based on the snmp__df 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 $MAXLABEL = 20;
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")
{
# HOST-RESOURCES-MIB::hrStorage
# HOST-RESOURCES-TYPES::hrStorageVirtualMemory
print "require 1.3.6.1.2.1.25.2. 1.3.6.1.2.1.25.2.1.3\n";
exit 0;
}
if ($0 =~ /^(?:|.*\/)snmp_([^_]+)_swap$/)
{
$host = $1;
if ($host =~ /^([^:]+):(\d+)$/)
{
$host = $1;
$port = $2;
}
}
elsif (!defined($host))
{
print "# Debug: $0 -- $1\n" if $DEBUG;
die "# Error: couldn't understand what I'm supposed to monitor.";
}
my ($session, $error) = Net::SNMP->session(
-hostname => $host,
-community => $community,
-port => $port
);
if (!defined ($session))
{
die "Croaking: $error";
}
my $hrStorage = "1.3.6.1.2.1.25.2.";
my $hrStorageVirtualMemory = "1.3.6.1.2.1.25.2.1.3";
my $hrStorageSize = "1.3.6.1.2.1.25.2.3.1.5.";
my $hrStorageUsed = "1.3.6.1.2.1.25.2.3.1.6.";
my $swap_d = get_by_regex($session, $hrStorage, $hrStorageVirtualMemory);
my $swapsize = 0; my $swapused = 0;
foreach my $swap (keys %$swap_d)
{
$swapsize += get_single($session, $hrStorageSize . $swap);
$swapused += get_single($session, $hrStorageUsed . $swap);
}
if (defined $ARGV[0] and $ARGV[0] eq "config")
{
print "host_name $host\n";
print "graph_title Virtual memory usage\n";
if ($swapsize > 0)
{
print "graph_args -l 0 --base 1000 --upper-limit $swapsize\n";
}
else
{
print "graph_args -l 0 --base 1000\n";
}
print "graph_vlabel Bytes\n";
print "graph_category disk\n";
print "graph_info This graph shows swap usage in bytes.\n";
print "swap.label swap\n";
print "swap.type DERIVE\n";
print "swap.min 0\n";
exit 0;
}
print "swap.value $swapused\n";
sub get_single
{
my $handle = shift;
my $oid = shift;
print "# Getting single $oid..." if $DEBUG;
$response = $handle->get_request ($oid);
if (!defined $response->{$oid})
{
print "undef\n" if $DEBUG;
return undef;
}
else
{
print "\"$response->{$oid}\"\n" if $DEBUG;
return $response->{$oid};
}
}
sub get_by_regex
{
my $handle = shift;
my $oid = shift;
my $regex = shift;
my $result = {};
my $num = 0;
my $ret = $oid . "0";
my $response;
print "# Starting browse of $oid...\n" if $DEBUG;
while (1)
{
if ($num == 0)
{
print "# Checking for $ret...\n" if $DEBUG;
$response = $handle->get_request ($ret);
}
if ($num or !defined $response)
{
print "# Checking for sibling of $ret...\n" if $DEBUG;
$response = $handle->get_next_request ($ret);
}
if (!$response)
{
return undef;
}
my @keys = keys %$response;
$ret = $keys[0];
print "# Analyzing $ret (compared to $oid)...\n" if $DEBUG;
last unless ($ret =~ /^$oid/);
$num++;
next unless ($response->{$ret} =~ /$regex/);
@keys = split (/\./, $ret);
$result->{$keys[-1]} = $response->{$ret};;
print "# Index $num: ", $keys[-1], " (", $response->{$ret}, ")\n" if $DEBUG;
};
return $result;
}