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【Shell】服务器内存、磁盘、cpu、swap 监控

作者:Foyon / 发布于2013/7/1/ 1980


	#!/bin/bash

	MAILLIST="foyon0806@gmail.com" #emailist

	MEM_CORDON=100 #内存使用大于这个值报警
	SWAP_CORDON=50 #交换区使用值大于这个报警
	CPU_CORDON=5 #cpu空闲小于这个值报警
	DISK_CORDON=85 #磁盘占用大于这个值报警
	HOSTNAME=`hostname`
	DATA=`date`

	send_warning()
	{
	 echo $MESSAGE | /bin/mail -s "$TITLE" "$MAILLIST"
	}

	if [ $# -ne 0 ];then
	 DISK_DIR=$1
	else
	 DISK_DIR="/dev/sdb1"
	fi

	#MEM|SWAP check
	MEMSTATUS=`free | grep "Mem" | awk '{printf("%d", $3*100/$2)}'`
	SWAPSTATUS=`free | grep "Swap" | awk '{printf("%d", $3*100/$2)}'`

	if [ $MEMSTATUS -ge $MEM_CORDON ];then
	 TITLE="[bad_girl]:$HOSTNAME mem usage"
	 MESSAGE="Time:${DATA},Mem_used:${MEMSTATUS}%,Swap_used:${SWAPSTATUS}%"
	 send_warning
	fi

	if [ $SWAPSTATUS -ge $SWAP_CORDON ];then
	 TITLE="[bad_girl]:$HOSTNAME Swap usage"
	 MESSAGE="Time:${DATA},Mem_used:${MEMSTATUS}%,Swap_used:${SWAPSTATUS}%"
	 send_warning
	fi

	#cpu

	CPUSTATUS=`vmstat | awk '{print $15}' | tail -1`

	if [ $CPUSTATUS -le $CPU_CORDON ];then
	 TITLE="[bad_girl]:$HOSTNAME cpu usage"
	 MESSAGE="Time:${DATA},MCpu_free:${CPUSTATUS}%"
	fi

	#disk use n%

	DISKSTATUS=`df -h $DISK_DIR | awk '{print $5}' | tail -1 | tr -d %`

	if [ $DISKSTATUS -ge $DISK_CORDON ];then
	 TITLE="[bad_girl]:$HOSTNAME disk usage"
	 MESSAGE="Time:${DATA},Disk_used:${DISKSTATUS}%"
	 send_warning
	fi

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