2.nagios客户端安装

在被监控服务器（Linux/unix）上安装Nagios-plugins和nrpe 1、添加用户

/usr/sbin/useradd -m nagios
passwd nagios

2、解压安装nagios-plugins

cd /usr/local/src/tarbag
wget http://downloads.sourceforge.net/project/nagiosplug/nagiosplug/1.4.15/nagios-plugins-1.4.15.tar.gz?r=http%3A%2F%2Fwww.nagios.org%2Fdownload%2Fplugins%2F&ts=1331283502&use_mirror=ncu
tar zxvf nagios-plugins-1.4.15.tar.gz -C ../software/
cd ../software/nagios-plugins-1.4.15

Nagios-plugins默认安装到/usr/local/nagios

./configure
make
make install

更改目录属主

chown -R nagios.nagios /usr/local/nagios/

3、解压安装nrpe

cd /usr/local/src/tarbag
wget http://downloads.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.13/nrpe-2.13.tar.gz?r=http%3A%2F%2Fexchange.nagios.org%2Fdirectory%2FAddons%2FMonitoring-Agents%2FNRPE--2D-Nagios-Remote-Plugin-Executor%2Fdetails&ts=1331283624&use_mirror=nchc
tar zxvf nrpe-2.13.tar.gz -C ../software/
cd ../software/nrpe-2.13
./configure
make all

安装nrpe插件，本插件监控端可以不装

make install-plugin

安装nrpe守护进程

make install-daemon

安张nrpe配置文件

make install-daemon-config

4、配置相关文件修改nrpe配置文件，允许Nagios监控服务器（192.168.0.19）监控

cd /usr/local/nagios/etc/
vi nrpe.cfg

多台机器用逗号隔开

allowed_hosts=127.0.0.1,192.168.0.19

以独立守护进程启动nrpe，也可以使用xinetd启动nrpe，具体清查看nrpe官方文档。

/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

开机自动启动nrpe,在rc.local中加入上面行

vi /etc/rc.local

5、检查nrpe是否安装正常

/usr/local/nagios/libexec/check_nrpe -H localhost

得到以下输出 NRPE v2.13 返回nrpe版本说明安装没问题。查看启动端口

netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name  
tcp        0      0 0.0.0.0:5666                0.0.0.0:*                   LISTEN      27387/nrpe

如果有防火墙应该开放5666端口：

iptables -I eth0 -p tcp -m tcp –dport 5666 -j ACCEPT

6、定义监控项注意：我们需要在/usr/local/nagios/etc/nrpe.cfg中定义我们用到的监控本地资源的命令。下面的命令是默认定义的：

command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200

下面的命令是自己定义的：监控交换分区的使用情况，使用超过20％时为警告状态，超过10％时为严重状态

command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%

监控根分区磁盘使用情况

command[check_disk_root]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /

修改完配置需要重启nrpe 先将nrpe进程kill掉在执行

/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

转载于:https://my.oschina.net/766/blog/211448

2.nagios客户端安装

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