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nagios功能很多，最主要是有报警功能，但是nagios也有一个缺点，就是自身没有图形化工具，要另外去装pnp4nagios,网上大部分都是结合apache的，下面说一下pnp4nagios配合Nginx的配置

一，安装pnp4nagios

[root@localhost objects]# yum install pnp4nagios rrdtool

如果找不到包换epel源，博客里面有搜一下。关于nagios的安装，请参考：nagios 安装配置 详解

二，配置nagios

1，修改nagios.cfg

[root@localhost objects]# vim /etc/nagios/nagios.cfg    //修改以下内容
process_performance_data=1                             //由0改为1
host_perfdata_command=process-host-perfdata            //前面的注释拿掉
service_perfdata_command=process-service-perfdata      //注释拿掉
enable_environment_macros=1                            //如果有注释拿掉

2，修改commands.cfg

注释掉原有对process-host-perfdata和process-service-perfdata，重新定义

[root@localhost objects]# vim /etc/nagios/objects/commands.cfg

define command {
       command_name    process-service-perfdata
       command_line    /usr/bin/perl /usr/libexec/pnp4nagios/process_perfdata.pl
}

define command {
       command_name    process-host-perfdata
       command_line    /usr/bin/perl /usr/libexec/pnp4nagios/process_perfdata.pl -d HOSTPERFDATA
}

4、修改配置文件templates.cfg

添加以下内容

[root@localhost objects]# vim /etc/nagios/objects/templates.cfg 

define host {
        name       hosts-pnp
        register   0
        action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_
        process_perf_data               1
}
define service {
        name       srv-pnp
        register   0
        action_url /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
        process_perf_data               1
}

5，修改服务器配置文件localhost.cfg

[root@localhost objects]# vim /etc/nagios/objects/localhost.cfg

define host{
        use                     linux-server,hosts-pnp
        host_name               localhost
        alias                   localhost
        address                 127.0.0.1
        }

define service{
        use                             local-service,srv-pnp
        host_name                       localhost
        service_description             PING
        check_command                   check_ping!100.0,20%!500.0,60%
        }

上面只是例举了一个，你可以都加一下。

三，pnp4nagios配置

在网上好多关于pnp4nagios的文章，都是要把mv misccommands.cfg-sample misccommands.cfg 生成配置文件，我是yum安装的，安装目录下根本没有sample这样的东西

[root@localhost objects]# tree /etc/pnp4nagios/
/etc/pnp4nagios/
├── background.pdf
├── check_commands
│   ├── check_all_local_disks.cfg
│   ├── check_nrpe.cfg
│   └── check_nwstat.cfg
├── config.php
├── misccommands.cfg
├── nagios.cfg
├── npcd.cfg
├── pages
│   └── web_traffic.cfg
├── pnp4nagios_release
├── process_perfdata.cfg
└── rra.cfg

所在我根本没有配置任何东西。

四，重启nagios，启动npcd

[root@localhost pnp4nagios]# /etc/init.d/npcd start
[root@localhost pnp4nagios]# /etc/init.d/nagios restart

五，Nginx配置

配置Nginx的时候，配置挺头痛的，nagios的根目录是有php的，pnp4nagios是放在nagios的根目录下面，pnp4nagios也是php的，配置不好容易错乱的。

server
{
    listen       80;
    server_name  nagios.xxxx.com;
    index  index.php;
    root   /usr/share/nagios/html;

    location ~ .*\.(php|php5)?$ {        //nagios根目录的php
        fastcgi_pass  127.0.0.1:9000;
        fastcgi_index index.php;
        include fastcgi.conf;
    }

    location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$ {   //nagios的图片重写
        rewrite ^/nagios/images/(.*) /images/$1 break;
        rewrite ^/pnp4nagios/index.php/(.*) /pnp4nagios/$1 break;
        expires     30d;
    }

    location ~ .*\.(js|css)?$ {       //nagios的js,css重写
        rewrite ^/nagios/stylesheets/(.*) /stylesheets/$1 break;
        rewrite ^/nagios/js/(.*) /js/$1 break;
        rewrite ^/pnp4nagios/index.php/(.*) /pnp4nagios/$1 break;
        expires     1h;
    }

    location ~ .*\.cgi$ {             //nagios的主程序是perl的，perl的cgi重写
        root /usr/lib64/nagios/cgi-bin;
        rewrite ^/nagios/cgi-bin/(.*)\.cgi /$1.cgi break;
        fastcgi_pass   127.0.0.1:9001;
        fastcgi_index index.cgi;
        include fastcgi.conf;
    }
    location ~ ^(/pnp4nagios.*\.php)(.*)$ {       //pnp4nagios的php重写
        rewrite ^/pnp4nagios/index.php/index.php/(.*)$ /pnp4nagios/index.php/$1; break;
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_index index.php;
        include fastcgi.conf;
    }

}

在这里有一个问题就是http://nagios.xxxx.com/pnp4nagios/index.php/index.php/graph?host=localhost&srv=PING在这里有二个index.php，这个是php的程序加上去的，我并没有改。同一个页面有二种链接。

由nagios的监控页面，跳转到pnp4nagios监控页面的连接是

http://nagios.xxxx.com/pnp4nagios/index.php/graph?host=localhost&srv=PING

点php4nagios监控页面中的连接然后就会多加一个index.php，

http://nagios.xxxx.com/pnp4nagios/index.php/index.php/graph?host=localhost&srv=PING

这也是上面我为什么要加这一句rewrite ^/pnp4nagios/index.php/index.php/(.*)$ /pnp4nagios/index.php/$1; break;的原因

看一下效果图

点击上图中的折线小图，进入下图