upstream tornado {
    #server  172.25.0.22:8000 fail_timeout=0;
    server  web2py-tornado:8000 fail_timeout=0;
}

server {
    #listen        172.25.0.23:80 default_server;
    listen        web2py-nginx:80 default_server;

    location / {
        try_files $uri @proxy_to_tornado;
    }

    location @proxy_to_tornado {
     proxy_set_header X-Real-IP $remote_addr;
     proxy_redirect off;
     proxy_set_header Host $host;
                proxy_pass http://tornado;
        }
}