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NP01
Asked: 2010-09-05 23:42:56 +0800 CST

Apache: redirect subfolder to another IP in the LAN

  • 772

I have webserver1 behind a router currently serving all http traffic to mydomain.com. I just added webserver2, and want to redirect mydomain.com/server2 traffic to that box. To the user, the redirect should be unnoticed (i.e. the URL should just be mydomain.com/server2, and the redirection happens behind the scenes). How do I set this up in the apache configuration of webserver1 (I'm assuming webserver2's config needs to do nothing special)?

I've tried the advice given here, using mod_rewrite, but it didn't seem to do the trick:

RewriteEngine on
RewriteCond %{REQUEST_URI} ^/server2/
RewriteRule ^/$ http://192.168.1.102/ [P,L]

In case it is relevant, webserver1 is hosting a django app using mod_wsgi, with a few other apps that get redirected away. Here is the virtualhost conf:

<VirtualHost *:80>
    ServerAdmin [email protected]
    ServerName  www.mydomain.com
    ServerAlias 127.0.0.1

    RewriteEngine on
        RewriteCond %{REQUEST_URI} ^/server2/
        RewriteRule ^/$ http://192.168.1.102 [P,L]

    DocumentRoot /var/www
    <Directory />
        Options FollowSymLinks
        AllowOverride None
    </Directory>
    <Directory /var/www/>
        Options Indexes FollowSymLinks MultiViews
        AllowOverride None
        Order allow,deny
        allow from all
    </Directory>

    ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
    <Directory "/usr/lib/cgi-bin">
        AllowOverride None
        Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
        Order allow,deny
        Allow from all
    </Directory>

    ErrorLog /var/log/apache2/error.log

    # Possible values include: debug, info, notice, warn, error, crit,
    # alert, emerg.
    LogLevel warn

    CustomLog /var/log/apache2/access.log combined

    Alias /doc/ "/usr/share/doc/"
    <Directory "/usr/share/doc/">
        Options Indexes MultiViews FollowSymLinks
        AllowOverride None
        Order deny,allow
        Deny from all
        Allow from 127.0.0.0/255.0.0.0 ::1/128
    </Directory>

    <Directory /var/www/mydomain>
    Order allow,deny
    Allow from all
    </Directory>

    ...

    WSGIDaemonProcess mydomain user=user group=user threads=25
    WSGIProcessGroup mydomain

    WSGIScriptAlias / /home/user/mydomain/apache/django.wsgi
    Alias /phpmyadmin /usr/share/phpmyadmin/

</VirtualHost>

Thanks in advance.

apache-2.2 redirect directory local-area-network

2 Answers

  1. Best Answer

    Mod_Rewrite is more flexible than mod_proxy. Uncomment the load line for it.

    Simple comparison here http://www.wellho.net/mouth/1376_Choosing-between-mod-proxy-and-mod-rewrite.html

    <VirtualHost *:80>

RewriteEngine on

# just in case (don't want to accidentally expose all the internal servers) !
ProxyRequests off

# define a log file
RewriteLog /var/log/apache/server2.rewrite.log
RewriteLogLevel 1

# add the tailing / if not there
RewriteRule     ^/server2$          http://www.mydomain.com/server2/  [R] [L]

# proxy the request to internal url
RewriteRule     ^/server2/(.*)      http://192.168.1.102/$1 [P]

    Note that this example is case sensitive.

    • 4

  2. Use:

    ProxyPass /server2 http://192.168.1.102/server2

    You may also need ProxyPassReverse as well. See Apache documentation:

    http://httpd.apache.org/docs/2.2/mod/mod_proxy.html#proxypass

    Note that backend mod_wsgi MUST mount application at same sub URL as it is appearing and being proxied as on front end.

    Also be aware that may require configuration on back end to fiddle what host/port it appears back end application is running on so URL reconstruction in back end works properly when used. So research that if you find it is an issue.

    • 1