Serving instances on port 80 already used by apache - Ramaze/ramaze GitHub Wiki

If apache already serves this port and you don't want to use Passenger, you're not stuck.

Apache comes with two nifty modules : mod_proxy and mod_proxy_balancer. So you can set-up apache as a front-end to your thin/unicorn workers. The configuration is quite straightforward. Create a VirtualHost (if needed), and add the following directives in your VirtualHost config filei :

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>

# Redirect all non-static requests to thin
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>

If you need a fallback server that responds only when other servers are dead, you can add a member in the <Proxy> directive with the status=+H option :

<Proxy balancer://thinservers>
    BalancerMember http://127.0.0.1:5000
    BalancerMember http://127.0.0.1:5001
    BalancerMember http://127.0.0.1:5002
    BalancerMember http://someserver.example.com:80 status=+H
</Proxy>
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