最近有两台采集服务器磁盘老爆满，损失了不少数据。

shell脚本disk-ram-alert.sh

#!/bin/bash
# script that will send an email to EMAIL when disk use in partition PART or RAM use is bigger than %MAX
# adapt these 3 parameters to your case
DISK_MAX=70
RAM_MAX=50
DISK_PART=/dev/xvdb5
EMAIL=$1

# Local IP
IP=`/sbin/ifconfig eth1 | grep "inet addr" | awk -F: '{print $2}' | awk '{print $1}'`

# Disk usage
DISK_USE=`df -h |grep $DISK_PART | awk '{ print $5 }' | cut -d'%' -f1`
echo "Disk usage:$DISK_USE%"

# RAM usage
RAM_USED=`free -m | grep cache: | awk '{print $3}'`
RAM_TOTAL=`free -m | grep Mem: | awk '{print $2}'`
RAM_USE=$[ $RAM_USED * 100 / $RAM_TOTAL ]
echo "RAM usage:$RAM_USE%"

if [ $DISK_USE -gt $DISK_MAX ]; then
  echo "Disk percent used: $DISK_USE" | mail -s "[Disk alert]Running out of disk space-$IP" $EMAIL
fi

if [ $RAM_USE -gt $RAM_MAX ]; then
  echo "Ram percent used: $RAM_USE" | mail -s "[RAM alert]Running out of RAM-$IP" $EMAIL
fi
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添加计划任务，每小时检查一次：

0 */1 * * * /home/qi/disk-alert.sh redice@163.com