apache下配置虚拟主机案例详解

案例说明：
   域名：
       www.tianyik.com /var/html/www
       blog.tianyik.com /var/html/blog
       bbs.tianyik.com /var/html/bbs
   主机ip：192.168.31.36
   创建站点目录：mkdir /var/html/{www,blog,bbs}
   创建首页文件：
       touch /var/html/{www,blog,bbs}/index.html 或者
       for name in www blog bbs;do echo "http://$name.tainyik.com" >/var/html/$name/index.html;done
   检查创建情况：for name in www blog bbs;do cat /var/html/$name/index.html;done
   修改虚拟主机配置文件
       vim httpd-vhost.conf 修改如下：
           NameVirtualHost *:80
           <VirtualHost *:80>
               ServerAdmin tan.tianyik.com
               DocumentRoot "/var/html/www"
               ServerName www.tianyik.com
               ServerAlias tianyik.com
               ErrorLog "logs/dummy-host.example.com-error_log"
               ErrorLog "logs/www-error_log"
               CustomLog "logs/www-access_log" common
           </VirtualHost>
           <VirtualHost *:80>
               ServerAdmin tan.tianyik.com
               DocumentRoot "/var/html/blog"
               ServerName blog.tianyik.com
               ErrorLog "logs/blog-error_log"
               CustomLog "logs/blog-access_log" common
           </VirtualHost>
           <VirtualHost *:80>
               ServerAdmin tan.tianyik.com
               DocumentRoot "/var/html/bbs"
               ServerName bbs.tianyik.com
               ErrorLog "logs/bbs-error_log"
               CustomLog "logs/bbs-access_log" common
           </VirtualHost>
               注意：原来的<>需要删掉
   修改主配置文件
       去掉注释：Include conf/extra/httpd-vhosts.conf
       找到下面一段（段中有#的注释行已删除）
           <Directory "/application/apache2.2.31/htdocs">
               Options Indexes FollowSymLinks
               AllowOverride None
               Order allow,deny
               Allow from all
           </Directory>
       修改为下面的一段：
           <Directory "/var/html"> //不改会报403错误
               Options FollowSymLinks //去掉Indexes,为安全
               AllowOverride None
               Order allow,deny
               Allow from all
           </Directory>
       修改：ServerName localhost:80
           不改可能会报错如下：
           httpd: apr_sockaddr_info_get() failed for min
           httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
   检查语法：/application/apache/bin/apachectl -t
   平滑重启：/application/apache/bin/apachectl graceful
   在本地做解析：修改hosts文件
       添加：192.168.31.36 tianyik.com www.tianyik.com blog.tianyik.com bbs.tianyik.com
       检查修改情况 ping
   尝试访问：成功！