Apache2 ProxyPass for Rails App Gitlab

Question

I am attempting to setup a proxy with Apache2 so that incoming requests to http://myipaddress.com go to http://localhost:3000/ where I have Gitlab ( a rails app ) running. The following is what I have in my Apache configuration file on Ubuntu 10.04. I can successfully access the gitlab default page initially, but any subsequent requests performed by me by clicking on other pages after that go to a 404 NOT FOUND page. I can manually enter /gitlab/ in front of any of these failed redirects and they work just fine. How can I make this work without having to rewrite /gitlab/ after each redirect request after the initial request?

## Setup a proxy which listens on the port that gitlabh does ( from start_server.sh )
ProxyRequests Off
ProxyPass /gitlab/ http://localhost:3000/
ProxyPassReverse /gitlab/ http://localhost:3000/
#DocumentRoot /home/gitlabhq/gitlabhq/public
<Proxy http://localhost:3000/>
  Order deny,allow
  Allow from all
</Proxy>

I understand that I could have the code below , which would solve my problem. But I don't know how to modify the prefix of the gitlab rails service. I'd really appreciate some help!

ProxyPass /gitlab/ http://localhost:3000/gitlab/
ProxyPassReverse /gitlab/ http://localhost:3000/gitlab/

UPDATE:

Thanks to Friek's comment I've come very close to solving this. Below is part of my http.conf file. The only problem is when I hit the home button or the logo on the gitlab app it attempts to redirect to gitlab/ which gives me the basic index.html file from Apache2 saying 'it works!'. How can I configure this to allow me to simply got /gitlab and it takes me to the root home view of gitlab?? Thanks!

## For Gitlab using Apache2 Passenger
## Install on Ubuntu by:
## sudo gem install passenger && sudo passenger-install-apache2-module
## but only after running the install_and_configure_git.py script
## and creating a soft link to the rails gitlab /public directory like so:
## sudo ln -s /home/gitlabhq/gitlabhq/public /var/www/gitlab
LoadModule passenger_module /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.13/ext/apache2/mod_passenger.so
PassengerRoot /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.13
PassengerRuby /usr/local/bin/ruby
<VirtualHost *:80>

        ServerName gitlab

        ## Set the overall Document Root
        DocumentRoot /var/www
        <Directory /var/www>
                Allow from all
        </Directory>

        ## Set the Rails Base URI
        RackBaseURI /gitlab
        RailsBaseURI /gitlab
        <Directory /var/www/gitlab>
                Allow from all
                Options -MultiViews
        </Directory>

</VirtualHost>

Answer 1

I came across this gist that worked for me. In case it ever goes dead, I'll repost it.

---

unicorn config file

Edit file /home/gitlab/gitlab/config/unicorn.rb

Find line listen "#{app_dir}/tmp/sockets/gitlab.socket" and comment it. Uncomment line listen "127.0.0.1:8080"

required modules for apache

• sudo a2enmod proxy
• sudo a2enmod proxy_balancer
• sudo a2enmod proxy_http
• sudo a2enmod rewrite

/home/gitlab/gitlab/config/gitlab.conf

<VirtualHost *:80>
  ServerName git.domain.com

  # Point this to your public folder of teambox
  DocumentRoot /home/gitlab/gitlab

  RewriteEngine On

  <Proxy balancer://unicornservers>
    BalancerMember http://127.0.0.1:8080
  </Proxy>

  # Redirect all non-static requests to thin
  RewriteCond %{DOCUMENT_ROOT}/%{REQUEST_FILENAME} !-f
  RewriteRule ^/(.*)$ balancer://unicornservers%{REQUEST_URI} [P,QSA,L]

  ProxyPass / balancer://unicornservers/
  ProxyPassReverse / balancer://unicornservers/
  ProxyPreserveHost on

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

  # Custom log file locations
  ErrorLog  /var/log/apache2/gitlab_error.log
  CustomLog /var/log/apache2/gitlab_access.log combined
</VirtualHost>