shell编程磁盘监控(评估可用空间耗尽时间，邮件通知管理员)

文章由LinuxBoy分享于2019-03-25 12:03:27热评（435）

shell编程磁盘监控(评估可用空间耗尽时间，邮件通知管理员)

设定监控磁盘为/dev/md0；如果文件系统使用率大于90%，则会依次调用这3个函数估算文件系统耗尽时间，并将结果邮件发给管理员。

#!/bin/bash

##This script is used to monitor disk.

#6/20/11

#定义函数计算文件系统的写入速度

function disk_speed()

{

A=`df -k | grep "$1" | awk '{print $3}'`

sleep 30

B=`df -k | grep "$1" | awk '{print $3}'`

D=`expr $B - $A`

SPEED=`expr $D / 30`

echo $SPEED

unset A B D SPEED

}

#定义估计磁盘空间耗尽时间

function avai_time()

{

FREE=`df -k | grep "$1" | awk '{print $4}'`

if TIME=`expr $FREE / $2`

then

if [ $TIME -ge 60 ]

then

A=`expr $TIME / 60`

echo $A" minutes"

unset FREE TIME

return 0

else

echo "Unknow"

unset FREE TIME

return 0

else

echo "Unknow"

unset FREE TIME

return 1

}

#定义设置邮件内容函数

function content()

{

TEMP_FILE=/root/disk_monitor.tmp

echo "Warning disk:"$1 >$TEMP_FILE

echo "Used space:"$2 >>$TEMP_FILE

echo "Available space:"$3 >>$TEMP_FILE

echo "Use%:"$4"%" >>$TEMP_FILE

echo "Write speed:"$5 >>$TEMP_FILE

echo "Estimated time remaining:"$6 >>$TEMP_FILE

echo "Now time:"`date +"%Y-%m-%d %H:%M"` >>$TEMP_FILE

unset TEMP_FILE

return 0

}

#定义要监控的文件系统

MON_DISK=/dev/md0

USED=`df -h | grep "$MON_DISK" | awk '{print $5}' | sed 's/%//'`

#判断使用率是否大于90%，如果是，则执行then后面的语句

if [ $USED -ge 90 ]

then

USED_SPACE=`df -h | grep "$MON_DISK" | awk '{print $4}'`

AVAI_SPACE=`df -h | grep "$MON_DISK" | awk '{print $3}'`

W_SPEED=`disk_speed $MON_DISK`

if [ $W_SPEED != 0 ]

then

S_TIME=`avai_time $MON_DISK $W_SPEED`

else

S_TIME="Unknow"

content $MON_DISK $USED_SPACE $AVAI_SPACE $USED $W_SPEED $S_TIME

mail -s "Disk warning" root </root/disk_monitor.tmp

rm -rf /root/disk_monitor.tmp

unset MON_DISK USED USED_SPACE AVAI_SPACE W_SPEED S_TIME

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