使用Nagios監控Windows伺服器CPU使用率（SNMP方式）

監控WIndows伺服器相關性能，建議采用SNMP方式，但是配置比較麻煩。假如采用NSCLIENT++插件會更加友善，前提是需要在具體被監控伺服器上安裝插件。萬一影響了伺服器本身的應用程式就不太好了。是以，我一直在尋找監控Windows伺服器的SNMP方式。

1、增加腳本如下：

cat /usr/lib/nagios/plugins/check_snmp_win_cpuload.pl

#!/usr/bin/perl

#

# syntax: check_win_snmp_cpuload.pl HOST COMMUNITY WARN CRIT

# returns average load % across all CPUs

use strict;

use Net::SNMP;

my $host = shift;

my $community = shift;

my $warn = shift;

my $crit = shift;

unless($crit) {

errorExit("syntax: check_win_snmp_cpu.pl HOST COMMUNITY WARN CRIT");

}

our %ERRORS = (

OK => 0,

WARNING => 1,

CRITICAL => 2,

UNKNOWN => 3,

DEPENDENT => 4

);

my $oidCpuTable='.1.3.6.1.2.1.25.3.3.1.2';

# get SNMP session object

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

-hostname => $host,

-community => $community,

-port => 161,

-version => 1

errorExit( $err ) unless (defined($snmp));

# get cpu load table

my $response = $snmp->get_table(

-baseoid => $oidCpuTable

errorExit( "error getting cpu table" ) unless $response;

my %value = %{$response};

$snmp->close();

my $cnt = 0;

my $sum = 0;

foreach my $load ( values %value ){

$cnt += 1;

$sum += $load;

};

my $pct = int ($sum / $cnt);

my $err = ($pct > $crit) ? 'CRITICAL' : ($pct > $warn) ? 'WARNING' : 'OK';

print "$err : CPU Load $pct%/n";

exit $ERRORS{$err};

sub errorExit {

my $msg = shift;

print "UNKNOWN: $msg/n";

exit $ERRORS{UNKNOWN};

2、定義相應的執行指令：

cat mysnmp.cfg

define command{

command_name snmp_win_cpu

command_line /usr/lib/nagios/plugins/check_snmp_win_cpuload.pl '$HOS

TADDRESS$' public 80 90

3、建立服務配置檔案：

cat service.cfg

define service {

host_name jw-inside

service_description CPU

check_command snmp_win_cpu

use generic-service

4、建立主機檔案：

define host {

alias jw-inside

address 10.10.10.11

use generic-host

icon_image vendors/windowsxp.png

icon_image_alt jw-inside-server

vrml_image vendors/windowsxp.png

statusmap_image vendors/windowsxp.png

其實熟悉nagios配置的人，隻需要步驟1中的腳本就可以。我就不上圖檔了。