nagios 监控内存

前提：把check_mem.sh放到/usr/local/nagios/libexec下，并赋予 户执行权限就可以

chmod 755 check_mem.sh

一，监控本地（监控端本身）内存使用：

#修改commands配置

vim /usr/local/nagios/etc/objects/commands.cfg #增加以下内容 define command{                 command_name        check_mem                 command_line        $USER1$/check_mem.sh -w $ARG1$ -c $ARG2$                 }

#修改localhost.cfg

vim /usr/local/nagios/etc/objects/localhost.cfg
#增加以下内容
define service{
                use                                                         local-service
                host_name                                             localhost
                service_description                         memory
                check_command                                     check_mem!20!10!
                }

二，监控客户端内存使用情况：

 1,#修改客户端配置文件
    vim /usr/local/nagios/etc/nrpe.cfg

        #增加以下内容    
    command[check_mem]=/usr/local/nagios/libexec/check_mem.sh -w 10 -c 5
            
  2,#修改主控制端相关配置文件
     vim /usr/local/nagios/etc/service/liguxk.cfg    #主控端定义的被控端的配置文件
     #增加以下内容
                  define service{
                  use                                                         generic-service
                  host_name                                             liguxk
                  service_description                         Memory
                  check_command                                     check_nrpe!check_mem
                  }

chechk_mem.sh:

#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=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 $2-$3}'` # normal values #echo "$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

另一种方法：

由于LINUX使用内存的机制，监控内存没多大必要，还是记录下来

在被监控机/usr/local/nagios/etc/nrpe.cfg里添加

command[check_mem]=/usr/local/nagios/libexec/check_mem -w 150 -c 200

把check_mem(见附件)放到/usr/local/nagios/libexec/下，并赋予权限

chmod +x /usr/local/nagios/libexec/check_mem

chown nagios.nagios /usr/local/nagios/libexec/check_mem

监控端/usr/local/nagios/etc/objects/commands.cfg添加

define command{
        command_name    check_mem
        command_line    $USER1$/check_mem -w $ARG1$ -c $ARG2$
        }

/usr/local/nagios/etc/servers/252.cfg添加

define service{
        use                             generic-service         ; Name of service template to use
        host_name                       252
        service_description             memory
        check_command                   check_nrpe!check_mem!110,80!150,100
       }
重启nagios服务

 

说实话nagios监控内存没什么意思，你还要分析数据什么的不如直接利用cacti图形那样比较清晰，cacti的内存监控 是自己带的功能比较好实现的！