<Proxy balancer://blogcluster>
    # cluster member(s)
    BalancerMember http://127.0.0.1:7171 
</Proxy>

<VirtualHost *:81>
    ServerName blog
    DocumentRoot /var/www/cache/public

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

    RewriteEngine On

    RewriteRule ^$ index.html [QSA]
    RewriteRule ^([^.]+)$ $1.html [QSA]

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

</VirtualHost>