#!/usr/bin/perl -w # # Copyright (C) 2006 Lars Strand # # Munin plugin to monitor memory usage by use of SNMP. # Based on 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 $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 "index 1.3.6.1.2.1.25.5.1.1.2.\n"; print "require 1.3.6.1.2.1.25.5.1.1.2. [1-9]\n"; print "require 1.3.6.1.2.1.25.2.2.0\n"; # memsize exit 0; } if ($0 =~ /^(?:|.*\/)snmp_([^_]+)_memory$/) { $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."; } # memory usage pr. process my $hrSWRunPerfMem = "1.3.6.1.2.1.25.5.1.1.2."; my ($session, $error) = Net::SNMP->session( -hostname => $host, -community => $community, -port => $port ); if (!defined ($session)) { die "Croaking: $error"; } # total memory my $memsize = &get_single($session, "1.3.6.1.2.1.25.2.2.0") * 1024; if (defined $ARGV[0] and $ARGV[0] eq "config") { print "host_name $host\n"; print "graph_title Memory usage\n"; print "graph_category system\n"; print "graph_vlabel Bytes\n"; print "graph_info This grap shows memory usage.\n"; # some devices reports negative memtotal value print "# Total memsize reported $memsize..." if $DEBUG; if ($memsize > 0) { print "graph_args --base 1024 -l 0 --upper-limit $memsize\n"; } else { print "graph_args --base 1024 -l 0\n"; } print "memory.draw AREA\n"; print "memory.label memory\n"; exit 0; } my $processes = get_by_regex($session, $hrSWRunPerfMem, "[1-9]"); # the values my $memtotal = 0; while (my ($pid, $mem) = each(%$processes)) { $memtotal += $mem; } printf "memory.value %d\n", ($memtotal * 1024); 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; }