Nagios监控--案例一
服务端的IP是192.168.223.128，客户端是192.168.223.133，在服务端监控客户端的磁盘负载，swap使用情况，登录的用户数，总进程数，系统负载，僵尸进程数1、 在服务端安装nagios主程序，nagios-plugins，nrpe。客户端安装nagios-plugins,nrpe。并且启动服务端和客户端的nrpe
启动nrpe命令：/usr/local/nagios/bin/nrpe -c/usr/local/nagios/etc/nrpe.cfg –d检测两端nrpe通不通的命令：/usr/local/nagios/libexec/check_nrpe -H对端的IP地址2、 在客户端/usr/local/nagios/etc/nrpe文件下定义要监控的项目
3、 在服务端的/usr/local/nagios/etc/objects/commands.cfg文件下定义nrpe命令,格式如下：
define command{command_name check_nrpe command_line $USER1$/check_nrpe-H $HOSTADDRESS$ -c $ARG1$
}4、 在服务端的/usr/local/nagios/etc/objects/目录下（也可以在别的目录定义，只是为了方便）定义一个以客户端IP为文件名的配置文件192.168.223.133.cfg，加入入下内容：
define host{
use linux-server
host_name 192.168.223.133
alias 192.168.223.133
address 192.168.223.133
}
define service{
use local-service
host_name 192.168.223.133
service_description 133_user
check_command check_nrpe!check_users
}
define service{
use local-service
host_name 192.168.223.133
service_description 133_total_process
check_command check_nrpe!check_total_procs
}
define service{
use local-service
host_name 192.168.223.133
service_description 133_load
check_command check_nrpe!check_load
}
define service{
use local-service
host_name 192.168.223.133
service_description 133_sda1_monitor
check_command check_nrpe!check_sda1
}
define service{
use local-service
host_name 192.168.223.133
service_description 133_sda3_monitor
check_command check_nrpe!check_sda3
}
define service{
use local-service
host_name 192.168.223.133
service_description 133_zombie_procs
check_command check_nrpe!check_zombie_procs
}
define service{
use local-service
host_name 192.168.223.133
service_description 133_swap
check_command check_nrpe!check_swap
}
5、 在服务端的主配置文件/usr/local/nagios/etc/nagios.cfg里引用192.168.223.133.cfg文件
6、 检测，重启nagios服务
/usr/local/nagios/bin/nagios-v/usr/local/nagios/etc/nagios.cfg然后在网页上可以看到如下的画面
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