Nagios依赖PHP环境和perl环境，由于不支持Perl的CGI，需先来搭建Perl环境，Nagios原理介绍略。
文章原出处：https://blog.linuxeye.com/312.html1、下载最新稳定源码包和Perl脚本
mkdir -cacticd nagios-cacti wget http://www.cpan.org/modules/by-module/FCGI/FCGI-0.74.tar.gz wget http://www.cpan.org/authors/id/B/BO/BOBTFISH/FCGI-ProcManager-0.24.tar.gz wget http://blog.linuxeye.com/wp-content/uploads/2013/04/perl-fcgi.pl wget http://jaist.dl.sourceforge.net/project/nagios/nagios-3.x/nagios-3.5.0/nagios-3.5.0.tar.gz wget http://nchc.dl.sourceforge.net/project/nagiosplug/nagiosplug/1.4.16/nagios-plugins-1.4.16.tar.gz wget http://nchc.dl.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.14/nrpe-2.14.tar.gz
2、Nginx对Perl的CGI支持
Nginx支持的CGI方法有好几种，基本原理都是通过Perl的FCGI模块实现，下面的方法就是其中一种：安装FCGI模块tar xzf FCGI-0.74.tar.gz cd FCGI-0.74 perl Makefile.PL make && make install cd ../
安装FCGI-ProcManager模块
tar xzf FCGI-ProcManager-0.24.tar.gz cd FCGI-ProcManager-0.24 perl Makefile.PL make && make install cd ../
Perl脚本
cp perl-fcgi.pl /usr/local/nginx chmod +x /usr/local/nginx/perl-fcgi.pl /usr/local/nginx/perl-fcgi.pl > /usr/local/nginx/logs/perl-fcgi.log 2>&1 & #启动Perl chmod 777 /usr/local/nginx/logs/perl-fcgi.sock #Nginx Log中提示Permision Denied方法 cd ../
3、Nagios安装(服务端)
useradd -s /sbin/nologin nagios groupadd nagcmd usermod -a -G nagcmd nagios usermod -a -G nagcmd www tar xzf nagios-3.5.0.tar.gz cd nagios yum -y install gd-devel ./configure --prefix=/usr/local/nagios --with-command-group=nagcmd make all make install #用于安装主要的程序、CGI及HTML文件 make install-init #用于生成init启动脚本 make install-config #用于安装示例配置文件 make install-commandmode #用于设置相应的目录权限 chkconfig --add nagios chkconfig nagios on cd ../
Nagios主程序只是提供一个运行框架，其具体监控是靠运行在其下的插件完成的，Nagios插件必须安装
tar xzf nagios-plugins-1.4.16.tar.gz cd nagios-plugins-1.4.16 ./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios make && make install cd ../
由于Nagios只能监测自己所在的主机的一些本地情况,例如，cpu负载、内存使用、硬盘使用等等。如果想要监测被监控的服务器上的这些本地情况，就要
用到NRPE。NRPE(Nagios Remote PluginExecutor)是Nagios的一个扩展，它被用于被监控的服务器上，向Nagios监控平台提供该服务器的一些本地的情况。NRPE可以称为Nagios的客户端。tar xzf nrpe-2.14.tar.gz cd nrpe-2.14 ./configure make && make install cp sample-config/nrpe.cfg /usr/local/nagios/etc/ chown nagios.nagios /usr/local/nagios/etc/nrpe.cfg cd ../
4、Nginx配置（服务端）
ln -s /usr/local/nagios/share /data/admin/nagios
以http://www.linuxeye.com/nagios，需要建立软链接，服务nginx.conf配置文件如下：
################http://www.linuxeye.com/nagios######################### server { listen 80; server_name _; access_log /dev/null; root /data/admin; index index.php; location ~ .*\.(php|php5)?$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; include fastcgi.conf; } location ~ .*\.(htm|html|gif|jpg|jpeg|png|bmp|swf|ioc|rar|zip|txt|flv|mid|doc|ppt|pdf|xls|mp3|wma)$ { expires 30d; } location ~ .*\.(js|css)?$ { expires 1h; } location /status { stub_status on; } location ~ .*\.(cgi|pl)?$ { auth_basic "Nagios Access"; auth_basic_user_file /usr/local/nagios/etc/htpasswd.users; gzip off; root /usr/local/nagios/sbin; rewrite ^/nagios/cgi-bin/(.*)\.cgi /$1.cgi break; fastcgi_pass unix:/usr/local/nginx/logs/perl-fcgi.sock; fastcgi_param SCRIPT_FILENAME /usr/local/nagios/sbin$fastcgi_script_name; fastcgi_index index.cgi; fastcgi_param REMOTE_USER $remote_user; fastcgi_param HTTP_ACCEPT_LANGUAGE en_US; include fastcgi_params; fastcgi_read_timeout 60; } } 以http://nagios.linuxeye.com服务nginx.conf配置文件如下：
################http://nagios.linuxeye.com############################## server { listen 80; server_name nagios.linuxeye.com; access_log logs/nagios_access.log combined; auth_basic "Nagios Access"; auth_basic_user_file /usr/local/nagios/etc/htpasswd.users; location / { root /usr/local/nagios/share; index index.html index.htm index.php; } location ~ .*\.(php|php5)?$ { root /usr/local/nagios/share; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; include fastcgi.conf; } location /nagios { alias /usr/local/nagios/share; } location /cgi-bin/images { alias /usr/local/nagios/share/images; } location /cgi-bin/stylesheets { alias /usr/local/nagios/share/stylesheets; } location /cgi-bin { alias /usr/local/nagios/sbin; } location ~ .*\.(cgi|pl)?$ { gzip off; root /usr/local/nagios/sbin; rewrite ^/nagios/cgi-bin/(.*)\.cgi /$1.cgi break; fastcgi_pass unix:/usr/local/nginx/logs/nginx-fcgi.sock; fastcgi_param SCRIPT_FILENAME /usr/local/nagios/sbin$fastcgi_script_name; fastcgi_index index.cgi;