Apache 2 + Proxy Balancer + Thin + Rails Asset Pipeline Development Environment for MacOSX

httpd.conf

# These modules should be loaded by default: proxy_module, proxy_balancer_module, rewrite_module

Listen *:80

# You may want to keep the VirtualHost config under extra/*.conf
# Start your thin

<VirtualHost *:80>
  ServerName wwww.yourawesomeapp.dev
  DocumentRoot /Users/vicente/Workspaces/yourawesomeapp/public

  RewriteEngine On

  <Proxy balancer://thinservers>
      BalancerMember http://127.0.0.1:5000
      BalancerMember http://127.0.0.1:5001
      BalancerMember http://127.0.0.1:5002
  </Proxy>

  RewriteCond %{DOCUMENT_ROOT}/%{REQUEST_FILENAME} !-f
  RewriteRule ^/(.*)$ balancer://thinservers%{REQUEST_URI} [P,QSA,L]

  ProxyPass / balancer://thinservers/
  ProxyPassReverse / balancer://thinservers/
  ProxyPreserveHost on

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

  <Directory /Users/vicente/Workspaces/yourawesomeapp/public>
    AllowOverride all
    Options -MultiViews
  </Directory>
</VirtualHost>

Took me a while to get to this gist again. I'll give it a shot again shortly as I'm not using this setup since then.