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contrib-munin/plugins/system/snmp__cpu

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2006-11-20 13:37:14 +01:00
#!/usr/bin/perl -w
#
# Copyright (C) 2006 Lars Strand
#
# Munin plugin to monitor CPU-load 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 1.3.6.1.2.1.25.3.3.1.2.\n";
print "require 1.3.6.1.2.1.25.3.3.1.2.1\n"; # CPU #1
exit 0;
}
if ($0 =~ /^(?:|.*\/)snmp_([^_]+)_cpu$/)
{
$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";
}
# CPUs
my $hrProcessorLoad = "1.3.6.1.2.1.25.3.3.1.2.";
$response = $session->get_table($hrProcessorLoad);
if (!defined ($response))
{
die "Croaking: $error";
}
if (defined $ARGV[0] and $ARGV[0] eq "config")
{
print "host_name $host\n";
print "graph_title CPU usage (in %)
graph_category system
graph_args --upper-limit 100 -l 0
graph_vlabel %
graph_info This graph shows the CPU load on the system.
";
foreach my $cpuoid (keys %$response) {
my @oid = split(/\./, $cpuoid);
my $cpu = pop @oid;
print "cpu$cpu.label CPU $cpu\n";
print "cpu$cpu.info CPU load on CPU $cpu\n";
}
exit 0;
}
# the values
while (my ($cpuoid, $load) = each(%$response)) {
my @oid = split(/\./, $cpuoid);
my $cpu = pop @oid;
print "cpu$cpu.value $load\n";
}