注释:

脚本中有两种默认.

按照剩余内存

$check_file -w 2548 -c 2048 -b 1

按照剩余内存百分比

1 在nagios-plugins-nrpe安装目录(如/usr/local/nagios/libexec/)添加插件check_mem_free.sh

check_name="check_mem_free"

2.赋权

3.  在nrpe中增加command(监控项目)

echo "command[$check_name]=$nagios_dir/$check_file -w 2597152 -c 2097152 -b 1" >> $nagios_etcdir/nrpe.cfg

4.验证

tail $nagios_etcdir/nrpe.cfg

5. 重启nagios-plugins-nrp

bash /usr/local/nagios/bin/restart

#!/bin/sh

# Filename: check_mem_free.sh

function help {

 echo -e "\nStatus (Analysis of the)\

n\n\t$0:\n\t\t-c <integer>\tIf the % of Unknown is above <integer>, returns CRITICAL state\n\t\t-w <integer>\tIf the % of Unknown is below CRITICAL and above <integer>, returns WARNING state\n\t\t-b <number>\tPatter\n\t\t 0 >>>>>>Percentage\n\t\t 1 >>>>>>Numerical"

 exit -3

}

calc=/tmp/memcalc

# Getting parameters:

while getopts "w:c:b:h" OPT; do

 case $OPT in

  "w") warning=$OPTARG;;

  "c") critical=$OPTARG;;

  "b") Pattern=$OPTARG;;

  "h") help;;

 esac

done

# Checking parameters:

( [ "$warning" == "" ] || [ "$critical" == "" ] ) && echo "ERROR: You must specify warning and critical levels" && help

[[ "$critical" -ge "$warning"    ]] && echo "ERROR: critical level must be highter than warning level" && help

function Percentage_def() {

    echo "5" > $calc # decimal accuracy

    echo "k" >> $calc # commit

    echo "100" >> $calc # multiply

    echo "$free" >> $calc # division integer

    echo "$total" >> $calc # division integer

    echo "/" >> $calc # division sign

    echo "*" >> $calc # multiplication sign

    echo "p" >> $calc # print

    percent=`/usr/bin/dc $calc|/bin/sed 's/^\./0./'|/usr/bin/tr "." " "|/usr/bin/gawk {'print $1'}`

    if [[ $percent -lt $critical ]]; then

        results="CRITICAL - $free MB ($percent%) Free Memory"

        status=2

    else if [[ $percent -lt $warning ]]; then

            results="WARNING - $free MB ($percent%) Free Memory"

            status=1

         else

            results="OK - $free MB ($percent%) Free Memory"

            status=0

         fi

    fi

}

function Numerical_def() {

    percent=$free

    if [[ $percent -lt $critical ]]; then

        results="CRITICAL - $free MB"

        status=2

    else if [[ $percent -lt $warning ]]; then

            results="WARNING - $free MB"

            status=1

         else

            results="OK - $free MB"

            status=0

         fi

    fi

}

function free_def() {

    # 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 $2-$3}'`

    if [[ -z $Pattern ]]; then

        Percentage_def

    else

        case $Pattern in

          '0') Percentage_def;;

          '1') Numerical_def;;

          *) help;;

        esac

    fi

}

free_def

# Printing the results:

echo "$results| 'free'=$percent;$warning;$critical;"

# Bye!

exit $status