前言

本文将详细记录一下如何在单台服务器上，利用apache的virtualhost(虚拟主机)来搭建多个不同的web站点，并且每个站点独立管理自己的session，下面话不多说了，来一起看看详细的介绍吧。

开发环境

先说下我各项开发环境参数：

操作系统: RedHat6.7(CentOS) WEB服务器：apache2.2 php5.6.30

修改Apache配置

apache2.2 的配置文件路径在 /etc/httpd/conf/httpd.conf

我们用下面的命令修改apache的配置文件：

$ vim /etc/httpd/conf/httpd.conf

添加监听端口

找到如下的部分，

#
# Listen: Allows you to bind Apache to specific IP addresses and/or
# ports, in addition to the default. See also the <VirtualHost>
# directive.
#
# Change this to Listen on specific IP addresses as shown below to
# prevent Apache from glomming onto all bound IP addresses (0.0.0.0)
#
#Listen 12.34.56.78:80
Listen 80

默认的话，应该只会监听80端口，这里我们在后面加上用于另外站点的端口号。例如我们A站点是默认的80端口，B站点计划搭建在8080端口上，最终的配置文件修改成

...
#Listen 12.34.56.78:80
Listen 80
Listen 8080

启动并添加VirtualHost

接着在配置文件中找到下面的章节：

### Section 3: Virtual Hosts
#
# VirtualHost: If you want to maintain multiple domains/hostnames on your
# machine you can setup VirtualHost containers for them. Most configurations
# use only name-based virtual hosts so the server doesn't need to worry about
# IP addresses. This is indicated by the asterisks in the directives below.
#
# Please see the documentation at
# <URL:http://httpd.apache.org/docs/2.2/vhosts/>
# for further details before you try to setup virtual hosts.
#
# You may use the command line option '-S' to verify your virtual host
# configuration.

#
# Use name-based virtual hosting.
#
 NameVirtualHost *:80
 NameVirtualHost *:8080

上面的代码是我已经修改好的，默认的话，最后两行NameVirtualHost应该也是被注释掉了。 因为我们要启用虚拟主机，所以这里就把我们之前监听的两个端口都设置好。

同时，将之后的配置文件修改成如下的样子，我们先来设置默认的80端口的站点A

#
# VirtualHost example:
# Almost any Apache directive may go into a VirtualHost container.
# The first VirtualHost section is used for requests without a known
# server name.
#
<VirtualHost *:80>
# ServerAdmin webmaster@dummy-host.example.com
 DocumentRoot /var/www/webA
 ServerName webA
# ErrorLog logs/dummy-host.example.com-error_log
# CustomLog logs/dummy-host.example.com-access_log common
</VirtualHost>

默认的Apache是没有开启VirtualHost的，所以这些代码都是被注释掉了的，我们这里只需要把DocumentRoot和ServerName所在的行去掉注释并且编辑下就好了。

DocumentRoot指的的是我们A站点的网站根目录位置

接下来再补充上8080端口的B站点信息就好了。

<VirtualHost *:8080>
 DocumentRoot /var/www/webB
 ServerName webB
</VirtualHost>