NGINX Load Balance Setup

For load balancing, configure an upstream module and reference it in the server configuration block, like so:

upstream recogito {
  server 127.0.0.1:9003;
  server 127.0.0.1:9004;
  server 127.0.0.1:9005;
}

server {
  location / {
    proxy_pass http://recogito;
  }
}

A more concrete example is below:

http {
  upstream recogito {
    ip_hash;
    zone recogito 64k;
    server 127.0.0.1:8000 max_fails=3 fail_timeout=15s;
    server 127.0.0.1:8001 max_fails=3 fail_timeout=15s;
    server 127.0.0.1:8002 max_fails=3 fail_timeout=15s;
    sticky cookie recogcookie expires=1h;
    queue 100  timeout=70;
  }

  server {
    listen 80;
    server_name default_server;
    location / {
      proxy_pass http://recogito;
      health_check interval=10 fails=3 passes=2;
    }
  }
}

More info at:

• http://nginx.org/en/docs/http/load_balancing.html
• http://www.digitalocean.com/community/tutorials/how-to-set-up-nginx-load-balancing
• http://www.nginx.com/resources/admin-guide/load-balancer/