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nagios监控内存

发布时间:2020-07-27 06:12:09 阅读:865 作者:151wqooo 栏目:移动开发
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nagios 监控内存

nagios 版本:nagios-3.2.0
监控端:
1、定义插件
cd /usr/local/nagios/libexec
vim check_mem
把附件内容添加到文件中,这样监控内存的程序就做好了。
赋予权限:
chmod +x /usr/local/nagios/libexec/check_mem
检查命令:
./check_mem -h
[root@wqk1 libexec]# ./check_mem -h
Wrong Syntax: check_mem -h
Usage: check_mem [-w|--warning]<percent free> [-c|--critical]<percent free>
由帮助可以看出是以剩余内存为判断标准
./check_mem -w 90 -c 50
WARNING - 1658 MB (82%) Free Memory
[root@wqk1 libexec]# ./check_mem -w 95 -c 90
CRITICAL - 1658 MB (82%) Free Memory
2、定义命令
vim /usr/local/nagios/etc/objects/commands.cfg
   定义nrpe命令
define command{
       command_name    check_nrpe
       command_line    $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ -t 30
}
   定义内存命令
define command{
command_name check_mem
command_line $USER1$/check_mem -w $ARG1$ -c $ARG2$
}
3、定义被监控主机
vim /usr/local/nagios/etc/objects/localhost.cfg
define host {
       host_name       wqk_centos-107
       alias           centos-107
       address         192.168.10.107
       check_command   check-host-alive
       notification_options    d,u,r
       check_interval  1
       max_check_attempts      2
       contact_groups  admins
       notification_interval   10
       notification_period     24x7
}
4、定义服务
vim /usr/local/nagios/etc/objects/localhost.cfg
define service {
       host_name       wqk_centos-107
       service_description     check_mem
       check_period    24x7
       normal_check_interval   2
       retry_check_interval    1
       max_check_attempts      5
       notification_period     24x7
       notification_options    w,u,c,r
       check_command     check_nrpe!check_mem //如果没有定义check_nrpe,可以写成check_mem!90!50;而且如果监控端和被监控端的command字段不修改,只修改这里的数值就能影响到nagios监控结果。
}
5、检查排错
cd /usr/local/nagios/libexec
./check_nrpe -H 192.168.10.107 -c check_mem(被监控机命令定义后检查)
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
6、重启服务
service nagios restart
==================================================
被监控端:
1、定义插件
cd /usr/local/nagios/libexec
vim check_mem
把附件内容添加到文件中,这样监控内存的程序就做好了。
赋予权限:
chmod +x /usr/local/nagios/libexec/check_mem
检查命令:
./check_mem -h
./check_mem -w 90 -c 50
2、定义命令
编辑nrpe配置文件:
vim /usr/local/nagios/etc/nrpe.cfg

添加:

allowed_host=127.0.0.1,192.168.0.1(本机ip),192.168.0.100(监控机ip)

command[check_mem]=/usr/local/nagios/libexec/check_mem -w 90 -c 50 //设置90是为了看到效果,实际生产中要调低
3、重启服务
ps aux | grep nrpe
kill掉nrpe 进程
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d  //启动nrpe服务
4、远程测试命令
在监控端测试
cd /usr/local/nagios/libexec
./check_nrpe -H 192.168.10.107 -c check_mem
****************************************************************
check_mem 脚本:
#script to check real memory usage # L.Gill 02/05/06 - V.1.0 # ------------------------------------------ # ########  Script Modifications  ########## # ------------------------------------------ # Who         When           What # ---    ----      ---- # LGill         17/05/06  "$percent" lt 1% fix - sed edits dc result beggining with "." # # #!/bin/bash USAGE="`basename $0` [-w|--warning]<percent free> [-c|--critical]<percent free>"THRESHOLD_USAGE="WARNING threshold must be greater than CRITICAL: `basename $0` $*"calc=/tmp/memcalc percent_free=/tmp/mempercent critical=""warning=""STATE_OK=0STATE_WARNING=1STATE_CRITICAL=2STATE_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+$7}'` # normal values #echo "$total"MB total #echo "$used"MB used #echo "$free"MB free # make it into % percent free = ((free mem / total mem) * 100) 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'}` #percent1=`/usr/bin/dc $calc` #echo "$percent1" if [[ "$percent" -le  $critical ]]         then                 echo "CRITICAL - $free MB ($percent%) Free Memory"                 exit 2 fi if [[ "$percent" -le  $warning ]]         then                 echo "WARNING - $free MB ($percent%) Free Memory"                 exit 1 fi if [[ "$percent" -gt  $warning ]]         then                 echo "OK - $free MB ($percent%) Free Memory"                 exit 0 fi 
附件:http://down.51cto.com/data/2362585

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