Nagios内存监控脚本使用方法

#!/bin/bash
# check memory script
# sunny 2008.2.15
# Total memory
TOTAL=`free -m | head -2 |tail -1 |gawk '{print $2}'`
# Free memory
FREE=`free -m | head -2 |tail -1 |gawk '{print $4}'`
# to calculate free percent
# use the expression free * 100 / total
FREETMP=`expr $FREE \* 100`
PERCENT=`expr $FREETMP / $TOTAL`
echo "$FREE MB ($PERCENT%) Free Memory"
exit 0

#将上面的内容复制到/usr/local/nagios/libexec/check_mem.sh
#并用chmod a+x check_mem.sh 为这个插件添加执行功能
#在command.cfg中添加一项check_mem的内容如下
# 'check_mem' command definition
define command{
command_name check_mem
command_line $USER1$/check_mem.sh -H $HOSTADDRESS$
}
#接下来可以在services.cfg文件中添加了一项内存的监控如下
define service{
host_name nagios-server
service_description check_mem
check_command check_mem
max_check_attempts 5
normal_check_interval 3
retry_check_interval 2
check_period 24x7
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
contact_groups sagroup
}
记得最后测试一下配置文件
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

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