nagios监控远程主机上的资源
利用nrpe通过nagios插件check_load监控主机的cpu使用情况联系人及联系方式，发邮件等都已设置好，这里不再叙述。
1、在被监控主机上安装nrpe服务器，然后把nagios的所有插件都cp到nrpe的安装目录下，打开nrpe的配置文件nrpe.cfg,根据实际情况修改check_load插件的监控阀值。
command=/usr/local/nagios/libexec/check_load -w 4,3,3 -c 6,4,3
2、在nagios端配置监控主机和服务，localhost.cfg文件
define host {
host_name Mmysql
alias master
address 10.1.1.2
check_command check-host-alive
notification_options d,u,r
check_interval1
max_check_attempts 2
contact_groupsadmins
notification_interval 10
notification_period 24x7
}
define service {
host_name Mmysql
service_description cpu
check_period 24x7
normal_check_interval 1
retry_check_interval 1
max_check_attempts 3
notification_period 24x7
notification_options w,u,c,r
check_command check_nrpe!check_load
}
配置commands.cfg
define command {
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
3、重新载入nagios ，
4、自己编写插件,监控cpu
在被监控主机/usr/local/nagios/libexec 下编写check_cpushell脚本。
#!/bin/bash
cpu=`uptime|awk '{print $9}'|sed -rn 's/(.*)\..*/\1/p'`
if [ $cpu -gt 3 ];then
echo fuck!!! the cup is died
exit 2
else
echo Good the cup is ok
exit 0
fi
5、在nrpe的配置文件nrpe.cfg文件中定义新建的插件命令
command=/usr/local/nagios/libexec/check_cpu
6、在nagios端的localhost.cfg文件中定义监控服务
define service {
host_name Mmysql
service_description cpu_01
check_period 24x7
normal_check_interval 1
retry_check_interval 1
max_check_attempts 3
notification_period 24x7
notification_options w,u,c,r
check_command check_cpu!check_cpu
}
7、在commands.cfg文件中定义命令
define command {
command_name check_cpu
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
8、重新载入nagios
9、结果截图
http://blog.运维网.com/jingxiaoliang/../attachment/201303/221111270.jpg
用ab 命令给对被监控主机压力测试，加重cpu的负载，使其实现报警
http://blog.运维网.com/jingxiaoliang/../attachment/201303/221132304.jpg
http://blog.运维网.com/jingxiaoliang/../attachment/201303/221153127.jpg
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