为Nagios定义自定义脚本检测内存状态

sdxh0506

　　 1.脚本如下～

• #!/bin/bash
  
• #=========================================
  
• #File:      check_vm.sh
  
• #Description:
  
• #Author:    smileliuyb
  
• #Modify:    smileliuyb
  
• #Creation Date: 2013-1-14
  
• #Last Modified: 2013-1-14
  
• #=========================================
  
• 
  
• #======check-arg===============
  
• if [[ $4 != "" ]];then
  
•     echo $2 $4 | awk '$1 !~ /^[0-9]*[0-9,M,m,G,g]$/ || $2 !~ /^[0-9]*[0-9,m,g,M,G]$/{print "User like ./check_vm.sh -w freememory[M,G] -c freememory[M,G]";exit 3}'
  
•     if [ $? -eq 3 ];then
  
•         exit 3
  
•     fi
  
•     if [[ $1 == '-w' ]] && [[ $3 == '-c' ]];then
  
•         warning=`echo $2 | awk '$1 ~ /[0-9]$/{print $1};$1 ~ /[m,M]$/{print $1*1024};$1 ~ /[g,G]$/{print $1*1024*1024}'`
  
•         critical=`echo $4 | awk '$1 ~ /[0-9]$/{print $1};$1 ~ /[m,M]$/{print $1*1024};$1 ~ /[g,G]$/{print $1*1024*1024}'`
  
•     elif [[ $1 == '-c' ]] && [[ $3 == '-w' ]];then
  
•         warning=`echo $4 | awk '$1 ~ /[0-9]$/{print $1};$1 ~ /[m,M]$/{print $1*1024};$1 ~ /[g,G]$/{print $1*1024*1024}'`
  
•         critical=`echo $2 | awk '$1 ~ /[0-9]$/{print $1};$1 ~ /[m,M]$/{print $1*1024};$1 ~ /[g,G]$/{print $1*1024*1024}'`
  
•     else
  
•         echo "User like ./check_vm.sh -w freememory[M,G] -c freememory[M,G]"
  
•         exit 3
  
•     fi
  
• else
  
•     echo "User like ./check_vm.sh -w freememory[M,G] -c free[M,G]"
  
•     exit 3
  
• fi
  
• 
  
• #====see-mem and comparison with arg========
  
• freemem=`free -m | cut -d " " -f17`
  
• if [ $(( freemem*1024 )) -le $critical ];then
  
•     echo "Insufficient memory,Only"$freemem"M are free!"
  
•     exit 2
  
• elif [ $(( freemem*1024 )) -le $warning ];then
  
•     echo "Memory Warning,Only"$freemem"M are free!"
  
•     exit 1
  
• else
  
•     echo "Memory OK"
  
•     exit 0
  
• fi