在被监控服务器（Linux/unix）上安装Nagios-plugins和nrpe
1、添加用户文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
/usr/sbin/useradd -m nagios passwd nagios
2、解压安装nagios-plugins文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
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文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
./configure make make install
更改目录属主文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
chown -R nagios.nagios /usr/local/nagios/
3、解压安装nrpe文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
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文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
make install-plugin
安装nrpe守护进程文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
make install-daemon
安张nrpe配置文件文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
make install-daemon-config
4、配置相关文件文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
修改nrpe配置文件，允许Nagios监控服务器（192.168.0.19）监控文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
cd /usr/local/nagios/etc/ vi nrpe.cfg
多台机器用逗号隔开文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
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。文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
开机自动启动nrpe,在rc.local中加入上面行文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
vi /etc/rc.local
5、检查nrpe是否安装正常文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
/usr/local/nagios/libexec/check_nrpe -H localhost
得到以下输出
NRPE v2.13文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
返回nrpe版本说明安装没问题。
查看启动端口文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
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：文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
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：文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
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％时为严重状态文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%
监控根分区磁盘使用情况文章源自运维生存时间-https://www.ttlsa.com/nagios/install-nginx-client/
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
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