nagios自定义监控系统磁盘脚本

客户端

1、创建脚本check_disk.sh

[root@y2 ~]# vim /usr/lib64/nagios/plugins/check_disk.sh        #一般都放在这个路径下

#!/bin/bash

row=`df -h|wc -l`

for i in `seq 2 $row`

do

   ava=`df -h|sed -n "$i"p|awk '{print $4}'`         #获取磁盘可用值

   u_per=`df -h|sed -n "$i"p|sed -n "s/\%//"p|awk '{print $5}'`     #获取使用百分比值

   p_p=`df -h|sed -n "$i"p|awk '{print $6}'`      #获取挂载分区

   if [ "$u_per" -gt "97" ]

   then

       echo -n "$p_p CRITICAL $u_per% $ava "

       sta[$i]=2

   elif [ "$u_per" -gt "95" ]

   then

       echo -n "$p_p WARNING! $u_per% $ava "

       sta[$i]=1

   else

       echo -n "$p_p OK $u_per% $ava "

       sta[$i]=0

   fi

done

n=0

for j in `seq 2 $row`

do

   if [ "${sta[$j]}" -gt $n ]

   then

        n=${sta[$j]}

   fi

done

exit $n

######输出结果######

[root@y2 ~]# sh /usr/lib64/nagios/plugins/check_disk.sh

/ OK 26% 13G /dev/shm OK 0% 242M /boot OK 8% 426M

[root@y2 ~]# echo $?

0

2、保存后，修改该脚本的权限

[root@y2 ~]# chmod +x /usr/lib64/nagios/plugins/check_disk.sh

3、编辑/etc/nagios/nrpe.cfg，加入自定义的脚本

[root@y2 ~]# vim /etc/nagios/nrpe.cfg

command[check_disk]=/usr/lib64/nagios/plugins/check_disk.sh

4、重启nrpe服务

[root@y2 ~]# /etc/init.d/nrpe restart

服务端

5、检测刚才的脚本是否正常运行

[root@wy ~]# /usr/lib64/nagios/plugins/check_nrpe -H 192.168.219.128 -c check_disk    

/ OK 26% 13G /dev/shm OK 0% 242M /boot OK 8% 426M

解释说明：

如果正常的话，会输出一行磁盘检测的数据，否则可能会报错。

#####错误#####

[root@localhost ~]# /usr/lib64/nagios/plugins/check_nrpe -H 192.168.153.129 -c check_disk

NRPE: Unable to read output

#############          

注：原因是客户端的脚本没有修改权限

6、添加相应的service

[root@wy ~]#  cd /etc/nagios/conf.d

[root@wy conf.d]# vim 192.168.219.128.cfg

define service{

        use                     generic-service

        host_name               192.168.219.128

        service_description     check_disk

        check_command           check_nrpe!check_disk

        max_check_attempts      5

        normal_check_interval   1

}

注：也要检查一下/etc/nagios/object/commands.cfg里有没有check_nrpe

7、重启nagios服务、启动http服务

[root@wy conf.d]# /etc/init.d/nagios restart

[root@wy conf.d]# /etc/init.d/httpd start

8、访问浏览器查看