Nagios监控平台之五：监控linux主机的CPU温度

　　　我的机房没有温度报警装置，我用此方法实现对机房温度的掌控，如果只有一台报警，则可认为单机故障，如果几台同时报警，则可认为机房空调出现了问题。具体实现方法如下：

环境：被监控机：CentOS 6.3

1、安装硬件传感器监控软件　sensors

#yum　install lm_sensors*

2、运行sensors-detect进行传感器检测

#sensors-detect ##一路回车即可，此步我在虚拟机下报错，但在物理机上没有问题

3、运行sensors看是否能读取数据，如下像下面这样表示正常：

[root@rd02 ~]# sensors

coretemp-isa-0000

Adapter: ISA adapter

Core 0: +32.0°C (high = +76.0°C, crit = +100.0°C)

Core 1: +32.0°C (high = +76.0°C, crit = +100.0°C)

4、#vi /usr/local/nagios/libexec/check_cputemp ##粘贴如下#号之间的内容

##########################################################

#!/bin/sh

#########check_cputemp###########

#date : May 2011

#Licence GPLv2

#INSTALLATION

#the script need to install lm_sensors

#sensors's output need like below format

#########################################

#coretemp-isa-0000#

#Adapter: ISA adapter#

#Core 0: +27°C (high = +85°C)#

#

#coretemp-isa-0001#

#Adapter: ISA adapter#

#Core 1: +25°C (high = +85°C) #

#########################################

#you can use NRPE to define service in nagios

#check_nrpe!check_cputemp.sh

# Plugin return statements

STATE_OK=0

STATE_WARNING=1

STATE_CRITICAL=2

STATE_UNKNOWN=3

print_help_msg(){

$Echo "Usage: $0 -h to get help."

}

print_full_help_msg(){

$Echo "Usage:"

$Echo "$0 [ -v ] -m sensors -w cpuT -c cpuT"

$Echo "Sepicify the method to use the temperature data sensors."

$Echo "And the corresponding Critical value must greater than Warning value."

$Echo "Example:"

$Echo "${0} -m sensors -w 40 -c 50"

}

print_err_msg(){

$Echo "Error."

print_full_help_msg

}

to_debug(){

if [ "$Debug" = "true" ]; then

$Echo "$*" >> /var/log/check_sys_temperature.log.$$ 2>&1

fi

}

unset LANG

Echo="echo -e"

if [ $# -lt 1 ]; then

print_help_msg

exit 3

else

while getopts :vhm:w:c: OPTION

do

case $OPTION

in

v)

#$Echo "Verbose mode."

Debug=true

;;

m)

method=$OPTARG

;;

w)

WARNING=$OPTARG

;;

c)

CRITICAL=$OPTARG ;;

h)

print_full_help_msg

exit 3

;;

?)

$Echo "Error: Illegal Option."

print_help_msg

exit 3

;;

esac

done

if [ "$method" = "sensors" ]; then

use_sensors="true"

to_debug use_sensors

else

$Echo "Error. Must to sepcify the method to use sensors."

print_full_help_msg

exit 3

fi

to_debug All Values are \" Warning: "$WARNING" and Critical: "$CRITICAL" \".
fi

#########lm_sensors##################

if [ "$use_sensors" = "true" ]; then

sensorsCheckOut=`which sensors 2>&1`

if [ $? -ne 0 ];then

echo $sensorsCheckOut

echo Maybe you need to check your sensors.

exit 3

fi

to_debug Use $sensorsCheckOut to check system temperature

TEMP1=`sensors | head -3 | tail -1 | gawk '{print $3}' | grep -o [0-9][0-9]`

TEMP2=`sensors | head -4 | tail -1 | gawk '{print $3}' | grep -o [0-9][0-9]`

SUM=$(( $TEMP1 + $TEMP2 ))

TEMP=$(($SUM/2))

if [ -z "$TEMP" ] ; then

$Echo "No Data been get here. Please confirm your ARGS and re-check it with Verbose mode, then to check the log."

exit 3

fi

to_debug temperature data is $TEMP

else

$Echo "Error. Must to sepcify the method to use sensors"

print_full_help_msg

exit 3

fi

######### Comparaison with the warnings and criticals thresholds given by user############

CPU_TEMP=$TEMP

#if [ "$WARNING" != "0" ] || [ "$CRITICAL" != "0" ]; then

if [ "$CPU_TEMP" -gt "$CRITICAL" ] && [ "$CRITICAL" != "0" ]; then

STATE="$STATE_CRITICAL"

STATE_MESSAGE="CRITICAL"

to_debug $STATE , Message is $STATE_MESSAGE

elif [ "$CPU_TEMP" -gt "$WARNING" ] && [ "$WARNING" != "0" ]; then

STATE="$STATE_WARNING"

STATE_MESSAGE="WARNING"

to_debug $STATE , Message is $STATE_MESSAGE

else

STATE="$STATE_OK"

STATE_MESSAGE="OK"

to_debug $STATE , Message is $STATE_MESSAGE

fi

echo "The TEMPERATURE "$STATE_MESSAGE" "-" The CPU's Temperature is "$CPU_TEMP" ℃ !"

exit $STATE

##########################################################

5、赋予上述脚本执行权限：

#chmod +x /usr/local/nagios/libexec/check_cputemp

6、配置nrpe.cfg，添加如下一行：

command[check_cputemp]=/usr/local/nagios/libexec/check_cputemp -m sensors -w 38 -c 45

注意：以上六步均在被监控机上完成。

7、在Nagios服务器配置服务：

define service{

use generic-service

host_name <hostname>

service_description CPU Temperature

check_command check_nrpe!check_cputemp

}

保存后重启nagios服务即可。

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