nagios系列(六)之nagios实现对服务器cpu温度的监控

1、安装硬件传感器监控软件sensors

yum install -y lm_sensors*





2、运行sensors-detect进行传感器检测

##一路回车即可





Do you want to overwrite /etc/sysconfig/lm_sensors? (YES/no): 

Starting lm_sensors: loading module coretemp               [  OK  ]

Unloading i2c-dev... OK





3、运行sensors看是否能读取数据，如下像下面这样表示正常

# sensors

coretemp-isa-0000

Adapter: ISA adapter

ERROR: Can't get value of subfeature temp1_input: Can't read

Physical id 0:  +0.0°C  (high = +100.0°C, crit = +100.0°C)  

ERROR: Can't get value of subfeature temp2_input: Can't read

Core 0:         +0.0°C  (high = +100.0°C, crit = +100.0°C)  

ERROR: Can't get value of subfeature temp3_input: Can't read

Core 1:         +0.0°C  (high = +100.0°C, crit = +100.0°C)  





coretemp-isa-0002

Adapter: ISA adapter

ERROR: Can't get value of subfeature temp1_input: Can't read

Physical id 1:  +0.0°C  (high = +100.0°C, crit = +100.0°C)  

ERROR: Can't get value of subfeature temp2_input: Can't read

Core 0:         +0.0°C  (high = +100.0°C, crit = +100.0°C)  

ERROR: Can't get value of subfeature temp3_input: Can't read

Core 1:         +0.0°C  (high = +100.0°C, crit = +100.0°C)  





4、添加监控脚本vim /usr/local/nagios/libexec/check_cputemp





#!/bin/sh

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

#date : May 2013

#Licence GPLv2

#by Barlow

#/usr/local/nagios/libexec/check_cputemp

#you can use NRPE to define service in nagios

#check_nrpe!check_cputemp

# 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]`

TEMP3=`sensors | head -5 | tail -1 | gawk '{print $3}' | grep -o [0-9][0-9]`

TEMP4=`sensors | head -6 | tail -1 | gawk '{print $3}' | grep -o [0-9][0-9]`

##温度的取数根据你cpu的核数确定，我的是四核，所以取TEMP1-4个CPU温度数并计算平均值

SUM=$(( $TEMP1 + $TEMP2 + $TEMP3 + $TEMP4 ))

TEMP=$(($SUM/4))

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

##返回值中注意要包含性能数据，即采用|分隔的后半部数据，且数据单位不能包含中文，否则使用PNP等绘图软件无法正常绘图。

echo "The TEMPERATURE "$STATE_MESSAGE" "-" The CPU's Temperature is "$CPU_TEMP" ℃ ! | 温度=`echo $CPU_TEMP`Celsius;$WARNING;$CRITICAL"

exit $STATE





5、赋予脚本执行权限：

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





6、配置vim /usr/local/nagios/etc/nrpe.cfg，添加如下一行：

echo "command[check_cputemp]=/usr/local/nagios/libexec/check_cputemp -m sensors -w 38 -c 45" >>/usr/local/nagios/etc/nrpe.cfg





重新启动客户端nrpe服务

-w 表示警告值，-c表示关键（紧急）值，自行根据实际情况调整

注意：以上六步均在被监控机上完成。





在客户端测试是否ok，虚拟机测试不成功，需要在物理机上实现

# /usr/local/nagios/libexec/check_cputemp -m sensors -w 38 -c 45

The TEMPERATURE OK - The CPU's Temperature is 14 ℃ ! | 温度=14Celsius;38;45

服务端执行测试：

/usr/local/nagios/libexec/check_nrpe -H 192.168.8.93 -c check_cputemp



7、在Nagios服务端配置服务：

define service{

use             generic-service

host_name
需要被监控的hostname

service_description CPU Temperature

check_command check_nrpe!check_cputemp

}

保存后重启nagios服务