Nagios监控内存状态（check_mem）
在Nagios监控中，默认是没有check_mem这个插件的，也就是说不能监控内存的使用状态，而swap是可以的。下面贴上check_mem的代码：[*]#!/bin/bash
[*]
[*]# check_mem for Nagios
[*]# http://cto.luxiaok.com
[*]# 2013-03-25
[*]
[*]USAGE="`basename $0` [-w|--warning] [-c|--critical]"
[*]THRESHOLD_USAGE="WARNING threshold must be greater than CRITICAL: `basename $0` $*"
[*]critical=""
[*]warning=""
[*]STATE_OK=0
[*]STATE_WARNING=1
[*]STATE_CRITICAL=2
[*]STATE_UNKNOWN=3
[*]# print usage
[*]if [[ $# -lt 4 ]]
[*]then
[*] echo ""
[*] echo "Wrong Syntax: `basename $0` $*"
[*] echo ""
[*] echo "Usage: $USAGE"
[*] echo ""
[*] exit 0
[*]fi
[*]# read input
[*]while [[ $# -gt 0 ]]
[*]do
[*] case "$1" in
[*] -w|--warning)
[*] shift
[*] warning=$1
[*] ;;
[*] -c|--critical)
[*] shift
[*] critical=$1
[*] ;;
[*] esac
[*] shift
[*]done
[*]
[*]# verify input
[*]if [[ $warning -eq $critical || $warning -lt $critical ]]
[*]then
[*] echo ""
[*] echo "$THRESHOLD_USAGE"
[*] echo ""
[*] echo "Usage: $USAGE"
[*] echo ""
[*] exit 0
[*]fi
[*]# Total memory available
[*]total=`free -m | head -2 |tail -1 |gawk '{print $2}'`
[*]# Total memory used
[*]used=`free -m | head -2 |tail -1 |gawk '{print $3}'`
[*]# Calc total minus used
[*]free=`free -m | head -2 |tail -1 |gawk '{print $4+$6+$7}'`
[*]# Free Mem = free + buffers + cached
[*]# Normal values
[*]#echo "$total"MB total
[*]#echo "$used"MB used
[*]#echo "$free"MB free
[*]# make it into % percent free = ((free mem / total mem) * 100)
[*]
[*]FREETMP=`expr $free \* 100`
[*]percent=`expr $FREETMP / $total`
[*]
[*]if [[ "$percent" -le$critical ]]
[*] then
[*] echo "Critical - $free MB ($percent%) Free Memory"
[*] exit 2
[*]elif [[ "$percent" -le$warning ]]
[*] then
[*] echo "Warning - $free MB ($percent%) Free Memory"
[*] exit 1
[*]elif [[ "$percent" -gt$warning ]]
[*] then
[*] echo "OK - $free MB ($percent%) Free Memory"
[*] exit 0
[*]else
[*] echo "Unknow Status"
[*] exit 3
[*]fi
脚本内容来源于网络，基本是2008年以前的代码，我这里进行了优化和修改。需要注意的是参数-w和-c所匹配的值的十进制的百分数，即0-99，其实到100也没问题。但不要写成了内存的大小，那就悲剧了，不同的Server内存不同，用了多少M或者多少G也不同，所以记住是匹配十进制的百分比。
页:
[1]