nginx config for ruby

myapp.nginx.conf

upstream myapp {
    server 127.0.0.1:3000;
    server 127.0.0.1:3001;
    server 127.0.0.1:3002;
}

server {
    listen   80;
    server_name .example.com;
 
    access_log /var/www/myapp.example.com/log/access.log;
    error_log  /var/www/myapp.example.com/log/error.log;
    root       /var/www/myapp.example.com;
    index      index.html;
 
    location / {
        proxy_set_header  X-Real-IP  $remote_addr;
        proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header  Host $http_host;
        proxy_redirect    off;
        try_files /system/maintenance.html $uri $uri/index.html $uri.html @ruby;
    }
 
    location @ruby {
        proxy_pass http://myapp;
    }
}