一：安裝前準備
nagios server：192.168.1.10
nagios client：192.168.1.11
該博文安裝nagios只使用nagios郵件報警功能，如需畫圖另外安裝cacti，或其他插件
二：安裝服務
在nagios server上操作：
安裝Apache+php
yum install httpd httpd-devel php php-mysql php-common php-gd php-mbstring php-mcrypt php-devel php-xml gcc glibc glibc-common gd gd-devel openssl openssl-devel
groupadd nagios
useradd nagios
useradd -G nagios nagios
usermod -G nagios apache
wget http://sourceforge.net/projects/nagios/?source=directory
tar zxvf nagios-3.2.0.tar.gz
cd nagios-3.2.0
./configure --prefix=/usr/local/nagios --with-command-group=nagios
make all
make install
make install-init
make install-config
make install-commandmode
make install-webconf
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
service httpd restart
nagios-plugins下載地址：www.nagios.org
tar zxvf nagios-plugins-1.4.14.tar.gz
cd nagios-plugins-1.4.14
./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios
make && make install
wget http://sourceforge.net/projects/nagios-cn/files/latest/download
tar -xjf nagios-cn-3.2.3.tar.bz2
cd nagios-cn-3.2.3
./configure
make all
make install
http://sourceforge.net/projects/nagios/files/nrpe-2.x/
tar zxvf nrpe-2.13.tar.gz
cd nrpe-2.13
./configure
make all
make install-plugin
vi /usr/local/nagios/etc/objects/commands.cfg 在最後添加
define command {
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
檢查配置文件是否正確
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
在被監控主機上操作：
useradd -s /sbin/nologin nagios
tar zxvf nagios-plugins-1.4.14.tar.gz
cd nagios-plugins-1.4.14
./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios
make && make install
tar zxvf nrpe-2.13.tar.gz
cd nrpe-2.13
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config
make install-xinetd
yum install xinetd
vim /etc/xinetd.d/nrpe
將only_from = 後面加上監控端的地址：192.168.1.10
確保/etc/services有nrpe 5666/tcp #NRPE這一行，沒有則添加
重啓xinetd服務，至此被監控端配置完畢
/usr/local/nagios/libexec/check_nrpe -H 被監控端的地址
如能顯示 “NRPE v2.12”，表明NRPE可以和被監控端正常通信
安裝完畢，接下來開始配置。