虚拟Web主机的应用

为了降低网站构建及运行成本 ，出现了”虚拟Web主机“、在同一服务器上运行多个Web站点的应用，

其中每一个站点实际上并不独立占用整个服务器，使用虚拟Web主机可以充分利用服务器的硬件资源，大大

降低网站构建及运行成本（本实验紧凑Web服务基本搭建和访问控制）

下面来了解下虚拟Web主机的运作和DNS的结合案例：

一、新建HTTP子配置文件

[[email protected]_1 ~]# cd /etc/httpd/conf.d/
[[email protected]_1 conf.d]# touch 360.conf   //新建子配置文件
[[email protected]_1 conf.d]# cat 360.conf
NameVirtualHost *:80
<VirtualHost *:80>
    ServerAdmin [email protected]
    DocumentRoot /var/www/html                  //网页文件跟目录
    ServerName www.360.com                      //本站点的FQDN名称
    ErrorLog logs/www.360.com-error_log         //错误日志文件路径
    CustomLog logs/www.360.com_log common       //访问日志文件路径
</VirtualHost>
<VirtualHost *:80>
    ServerAdmin [email protected]
    DocumentRoot /var/www/sina
    ServerName sina.360.com
    ErrorLog logs/sina.360.com-error_log
    CustomLog logs/sina.360.com_log common
</VirtualHost>
<VirtualHost *:80>
    ServerAdmin [email protected]
    DocumentRoot /var/www/baidu
    ServerName baidu.360.com
    ErrorLog logs/baidu.360.com-error_log
    CustomLog logs/baidu.360.com_log common
</VirtualHost>

二、部署网站相应文件和网页文档

[[email protected]_1 conf.d]# mkdir /var/www/baidu
[[email protected]_1 conf.d]# mkdir /var/www/sina
[[email protected]_1 conf.d]# touch  /var/www/sina/index.html
[[email protected]_1 conf.d]# touch  /var/www/baidu/index.html
[[email protected]_1 conf.d]# cat /var/www/sina/index.html
                 sina.360.com
[[email protected]_1 conf.d]# cat /var/www/baidu/index.html
                 baidu.360.com
[[email protected]_1 conf.d]# service httpd restart

三、修改DNS本地区域数据文件

[[email protected] ~]# cd /var/named/chroot/var/named/
[[email protected] named]# vim 360.zone
[[email protected] named]# cat  360.zone
$TTL86400
@       IN      SOA     360.com. root.360.com.  (
                                      1997022700 ; Serial
                                      28800      ; Refresh
                                      14400      ; Retry
                                      3600000    ; Expire
                                      86400 )    ; Minimum
        IN      NS      dns1.360.com.
dns1    IN      A       192.168.122.20
www     IN      A       192.168.122.10
baidu   IN      A       192.168.122.10
sina    IN      A       192.168.122.10
*       IN      A       192.168.122.10        //泛域名解析，当输入
                     以“360.com”结尾的网址，会访文wwww.360.com

[[email protected] named]# service named restart

在客户端访问：

www.360.com.
baidu.360.com.
sina.360.com.
sin.360.com

虚拟Web主机的应用