虚拟主机 Virtual Host 的设置

一、应用场景

 +--------------+----------------+---------------------+
 | 域名          | 主机ip         | 对应的主目录          |
 +--------------+----------------+---------------------+
 | www.100.com  |192.168.80.135  | /var/www/html       |
 | bbs.100.com  |192.168.80.135  | /var/www/html/bbs   |
 | sns.100.com  |192.168.80.135  | /var/www/html/sns   |
 | ftp.100.com  |192.168.80.135  | /var/www/ftp        |
 +--------------+----------------+---------------------+

二、实现

# vim /etc/httpd/conf.d/virtual.conf

#本机任何页面的 port 80 所指定的虚拟主机
NameVirtualHost *:80

#设置www.100.com
#<directory>：针对目录浏览权限的设置
#<virtualhost>：对documentRoot、customlog（日志目录）进行设置
<directory "var/www/html">
options Followsymlinks
allowoverride none
order allow,deny
allow from all
</directory>

<virtualhost *:80>
serverName www.100.com
documentroot /var/www/html
customlog /var/log/httpd/www.access_log combined
</virtualhost>

#设置sns.100.com
<directory "/var/www/html/sns/">
Options FollowSymLinks
AllowOverride None
Order allow,deny
allow from all
</directory>

<virtualHost *:80>
serverName sns.100.com
documentRoot /var/www/html/sns
customlog /var/log/httpd/sns.access_log combined
</virtualHost>

#设置bbs.100.com
<directory "/var/www/html/bbs/">
Options FollowSymLinks
AllowOverride None
Order allow,deny
allow from all
</directory>
<virtualhost *:80>
servername bbs.100.com
documentroot /var/www/html/bbs
customlog /var/log/httpd/bbs.access_log combined
</virtualhost>

# 设置ftp.100.com
<directory "/var/www/ftp">
options Indexes FollowSymlinks
allowoverride none
order allow,deny
allow from all
</directory>

<virtualhost *:80>
servername ftp.100.com
documentroot /var/www/ftp
customlog /var/log/httpd/ftp.access_log combined
ErrorLog  /var/log/httpd/ftp.error_log combined
</virtualhost>

三、注意事项

• 在虚拟主机的设置中，还有很多可用的功能，不过，最低的限度是需要ServerName以及documentRoot。

• 使用了虚拟主机后，原本的主机名称www.100.com也要同时写入到对应的虚拟主机中，否则这个主机域名可能将不知道去向。

• CustomLog表示向对应主机访问时，日志将被写入到该文件中。但这个新增的日志必须要加入到logrotate的管理文件中，否则日志文件将会超级大。

• ErrorLog表示错误日志

# cd /etc/logrotate.d/
# vim httpd
/var/log/httpd/*log {
    missingok
    notifempty
    compress
    sharedscripts
    delaycompress
    postrotate
        /sbin/service httpd reload > /dev/null 2>/dev/null || true
    endscript
}