17、虚拟主机
站点标识： socket
IP相同，但端口不同
IP不同，但端口均为默认端口
FQDN不同：请求报文中首部 Host: www.magedu.com
有三种实现方案：
基于ip：为每个虚拟主机准备至少一个ip地址
基于port：为每个虚拟主机使用至少一个独立的port
基于FQDN：为每个虚拟主机使用至少一个FQDN(常用)
虚拟主机的配置方法：
<VirtualHost IP:PORT>
ServerName FQDN
DocumentRoot “/path"
</VirtualHost>
建议：上述配置存放在独立的配置文件中
其它可用指令：
ServerAlias：虚拟主机的别名；可多次使用
ErrorLog： 错误日志
CustomLog：访问日志
<Directory “/path"> </Directory>
Alias
实验：基于IP的多虚拟主机
vim /etc/httpd/conf.d/test.conf
<virtualhost 192.168.37.101:80>
documentroot /data/asite
CustomLog "logs/asite_access_log" combined
<Directory "/data/asite">
Require all granted:wqwq
</Directory>
</virtualhost>
<virtualhost 192.168.37.102:80>
documentroot /data/bsite
CustomLog "logs/bsite_access_log" combined
<Directory "/data/bsite">
Require all granted
</Directory>
</virtualhost>
<virtualhost 192.168.37.103:80>
documentroot /data/csite
CustomLog "logs/csite_access_log" combined
<Directory "/data/csite">
Require all granted
</Directory>
</virtualhost>
vim /etc/hosts
192.168.37.101 www.a.com
192.168.37.102 www.b.com
192.168.37.103 www.c.com
实验：基于port的多虚拟主机
vim /etc/httpd/conf/httpd.conf
listen 81
listen 82
listen 83
vim /etc/httpd/conf.d/test.conf
<virtualhost *:81>
documentroot /data/asite
<Directory "/data/asite">
Require all granted
</Directory>
</virtualhost>
<virtualhost *:82>
documentroot /data/bsite
<Directory "/data/bsite">
Require all granted
</Directory>
</virtualhost>
<virtualhost *:83>
documentroot /data/csite
<Directory "/data/csite">
Require all granted
</Directory>
</virtualhost>
vim /etc/hosts
192.168.37.7 www.a.com www.b.com www.c.com
实验： 基于主机头的多虚拟主机
vim /etc/httpd/conf.d/test.conf
<virtualhost *:80>
documentroot /data/asite
servername www.a.com
<Directory "/data/asite">
Require all granted
</Directory>
</virtualhost>
<virtualhost *:80>
documentroot /data/bsite
servername www.b.com
<Directory "/data/bsite">
Require all granted
</Directory>
</virtualhost>
<virtualhost *:80>
documentroot /data/csite
servername www.c.com
<Directory "/data/csite">
Require all granted
</Directory>
</virtualhost>
