nagios 监控内存使用情况
[*] 监控本机内存
cd /usr/lib64/nagios/plugins
touch check_mem.sh
#!/bin/bash
if [ "$1" = "-w" ] && [ "$2" -gt "0" ] && [ "$3" = "-c" ] && [ "$4" -gt "0" ]; then
memTotal_b=`free -b |grep Mem |awk '{print $2}'`
memFree_b=`free -b |grep Mem |awk '{print $4}'`
memBuffer_b=`free -b |grep Mem |awk '{print $6}'`
memCache_b=`free -b |grep Mem |awk '{print $7}'`
memTotal_m=`free -m |grep Mem |awk '{print $2}'`
memFree_m=`free -m |grep Mem |awk '{print $4}'`
memBuffer_m=`free -m |grep Mem |awk '{print $6}'`
memCache_m=`free -m |grep Mem |awk '{print $7}'`
memUsed_b=$(($memTotal_b-$memFree_b-$memBuffer_b-$memCache_b))
memUsed_m=$(($memTotal_m-$memFree_m-$memBuffer_m-$memCache_m))
memUsedPrc=$((($memUsed_b*100)/$memTotal_b))
if [ "$memUsedPrc" -ge "$4" ]; then
echo "Memory: CRITICAL Total: $memTotal_m MB - Used: $memUsed_m MB - $memUsedPrc% used!|TOTAL=$memTotal_b;;;; USED=$memUsed_b;;;; CACHE=$memCache_b;;;; BUFFER=$memBuffer_b;;;;"
$(exit 2)
elif [ "$memUsedPrc" -ge "$2" ]; then
echo "Memory: WARNING Total: $memTotal_m MB - Used: $memUsed_m MB - $memUsedPrc% used!|TOTAL=$memTotal_b;;;; USED=$memUsed_b;;;; CACHE=$memCache_b;;;; BUFFER=$memBuffer_b;;;;"
$(exit 1)
else
echo "Memory: OK Total: $memTotal_m MB - Used: $memUsed_m MB - $memUsedPrc% used|TOTAL=$memTotal_b;;;; USED=$memUsed_b;;;; CACHE=$memCache_b;;;; BUFFER=$memBuffer_b;;;;"
$(exit 0)
fi
else
echo "check_mem v1.1"
echo ""
echo "Usage:"
echo "check_mem.sh -w <warnlevel> -c <critlevel>"
echo ""
echo "warnlevel and critlevel is percentage value without %"
echo ""
echo "Copyright (C) 2012 Lukasz Gogolin (lukasz.gogolin@gmail.com)"
exit
fi
check_mem.sh Code chmod +x check_mem.sh
测试check_mem脚本是否能正常使用
./check_mem.sh -w 80 -c 90
修改commands.cfg配置
vi /etc/nagios/objects/commands.cfg
define command{
command_name check_mem
command_line $USER1$/check_mem.sh -w $ARG1$ -c $ARG2$
}
commands.cfg Code vi /etc/nagios/objects/localhost.cfg
define service{
use local-service,srv-pnp
host_name localhost
service_description check_mem
check_command check_mem!80!90
}
localhost.cfg Code
[*]监控被监控机内存使用情况
拷贝check_mem文件到被监控机的/usr/lib64/nagios/plugins目录下
scp check_mem root@serverip:/usr/lib64/nagios/plugins/
修改nrpe.cfg
vi /usr/local/nagios/etc/nrpe.cfg
增加一行：command=/usr/lib64/nagios/plugins/check_mem.sh -w 80 -c 90
回到nagios监控机修改服务项
vi /etc/nagios/objects/services.cfg
增加如下监控代码
define service{
use generic-service
host_name Nagios_Centos_Client1
service_description Memery Monitoring
check_command check_nrpe!check_mem
}
Check_mem Code nagios -v nagios.cfg
重启nagios即可
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