nixCraft

raj · #1 (**permalink**) 23rd December 2009, 11:48 PM

Hai!

I've two node running at 192.168.1.10:80 and 192.168.1.11:80. And one public IP x.y.z.y running at 80. I've installed nginx on x.y.z.y. How do I load balance traffic between two Apache nodes 192.168.1.10:80 and 192.168.1.11:80. ?

TIA

nixcraft · #2 (**permalink**) 23rd December 2009, 11:57 PM

Try:

Code:

 upstream backend  {
      server 192.168.1.10:80;
      server 192.168.1.11:80;
    }

 server {
      access_log  /var/log/nginx/access.log main;
      error_log   /var/log/nginx/error.log;
      index       index.html;
      limit_conn  gulag 50;
      listen      x.y.z.y:80 default; # public IP here
      root        /usr/local/www/nginx;
      server_name _; 
      # get full domain     
      location / {
        proxy_pass  http://backend;
        proxy_cache            cache;
        proxy_cache_valid      200 24h;
        proxy_cache_use_stale  error timeout invalid_header updating http_500 http_502 http_503 http_504;
        proxy_ignore_headers   Expires Cache-Control;
        proxy_redirect     off;
        proxy_set_header   Host             $host;
        proxy_set_header   X-Real-IP        $remote_addr;
        proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
      }
  }

Refer: NginxHttpUpstreamModule

raj · #3 (**permalink**) 30th December 2009, 05:36 PM

problem solved!

notjoe · #4 (**permalink**) 15th April 2010, 06:05 AM

Look good!

I have a question similar to this. I have multiple websites, on multiple private ips. I've grasped the fact i would need to set up multiple upstream directives with unique names such as:

upstream site_a {
server 192.168.1.21;
server 192.168.1.31;
}

upstream site_b {
server 192.168.1.22;
server 192.168.1.32;
}

But i am unsure how to direct the incoming traffic to the proper upstream directive!

nixcraft · #5 (**permalink**) 15th April 2010, 12:26 PM

Code:

upstream site_a {
server 192.168.1.21;
server 192.168.1.31;
}

upstream site_b {
server 192.168.1.22;
server 192.168.1.32;
}

# site_a backend with public IP 5.6.7.8:80
server {
      access_log  /var/log/nginx/access.log main;
      error_log   /var/log/nginx/error.log;
      index       index.html;
      limit_conn  gulag 50;
      listen      5.6.7.8:80 default; # public IP here
      root        /usr/local/www/nginx;
      server_name _; 
      # get full domain     
      location / {
        proxy_pass  http://site_a;
        proxy_cache            cache;
        proxy_cache_valid      200 24h;
        proxy_cache_use_stale  error timeout invalid_header updating http_500 http_502 http_503 http_504;
        proxy_ignore_headers   Expires Cache-Control;
        proxy_redirect     off;
        proxy_set_header   Host             $host;
        proxy_set_header   X-Real-IP        $remote_addr;
        proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
      }
  }

# site_b backend with public IP 1.2.3.4:80
server {
      access_log  /var/log/nginx/access.log main;
      error_log   /var/log/nginx/error.log;
      index       index.html;
      limit_conn  gulag 50;
      listen      1.2.3.4:80 default; # public IP here
      root        /usr/local/www/nginx;
      server_name _; 
      # get full domain     
      location / {
        proxy_pass  http://site_b;
        proxy_cache            cache;
        proxy_cache_valid      200 24h;
        proxy_cache_use_stale  error timeout invalid_header updating http_500 http_502 http_503 http_504;
        proxy_ignore_headers   Expires Cache-Control;
        proxy_redirect     off;
        proxy_set_header   Host             $host;
        proxy_set_header   X-Real-IP        $remote_addr;
        proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
      }
  }

See my guide

Keepalived Nginx HA Cluster Tutorial

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raj (30th December 2009), vamsi (30th December 2009)