nagios监控内存

zhousi

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
./check_mem -w 90 -c 50
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：
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：

• [Shell] 纯文本查看 复制代码

  #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 $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 

•   
  

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LOCKLOSE

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benzhou

写的真的很不错

liyao20060101

鸳鸳相抱何时了，鸯在一边看热闹。

lorry97

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

执行上面代码时  报错

./check_mem: line 23: syntax error in conditional expression