Ruby on rails ApacheConf，带有Passenger和ProxyPassMatch正则表达式，用于多个Ruby on Rails应用程序

我有一个Apache Sling应用程序，由Apache提供服务。然而，当有人访问同一个url，但在url的前面有/mstarfb时，他们会通过Passenger获得Ruby on Rails应用程序的服务。我想添加第二个RubyonRails应用程序，由/I-隐喻提供服务

以下是我目前拥有和使用的：

<VirtualHost *:80>
    ServerName beta.example.com

    ProxyRequests Off
    <Proxy *>
        Order deny,allow
        Allow from all
    </Proxy>

PassengerEnabled off

ProxyPassMatch ^/(?!mstarfb)(.*) http://127.0.0.1:8890/$1   
ProxyPassReverse / http://beta.example.com:8890


DocumentRoot /home/ruby/webapps/m-star-fb/current/public
    <Directory "/home/ruby/webapps/m-star-fb/current/public">
        PassengerEnabled on
        RailsBaseURI /mstarfb
        # This relaxes Apache security settings.
        AllowOverride all
        # MultiViews must be turned off.
        Options -MultiViews FollowSymLinks
        Order allow,deny
        Allow from all
    </Directory>

第二个问题是如何组织虚拟主机？在我尝试过的代理行之后：

    DocumentRoot /home/ruby/webapps
    <Directory "/home/ruby/webapps/m-star-fb/current/public">
    PassengerEnabled on
    RailsBaseURI /mstarfb
        AllowOverride all
        Options -MultiViews FollowSymLinks
        Order allow,deny
        Allow from all
    </Directory>

但它破坏了我的第一个应用程序。。。我还没有尝试添加第二个应用程序

    DocumentRoot /home/ruby/webapps
    <Directory "/home/ruby/webapps/m-star-fb/current/public">
    PassengerEnabled on
    RailsBaseURI /mstarfb
        AllowOverride all
        Options -MultiViews FollowSymLinks
        Order allow,deny
        Allow from all
    </Directory>