nginx as Loadbalancer, router + NAT

[Igor Sysoev]

On Tue, Jul 29, 2008 at 01:10:51PM +0200, Sascha sk. Kain wrote:

> we planing to switch our websites Loadbalancer to Nginx.
> Currently it is a Pound LB with around 1000-2000 connections/s and all Backend-Servers are in the same official Subnet.
> We want to make all Backend-Webservers private (192.168.x.x) and only the LB with an official IP address and NAT to the backends.
> Is this possible with nginx? I only see examples with 127.0.0.1.
> Does NAT and routing use a lot more Load?

If I understand your question, you may set any addreses in upstream:

    upstream  backend {
        server   192.168.1.1;
        server   192.168.1.2;
        server   192.168.1.3;
        server   192.168.2.1;
        server   192.168.2.1;
        # and
        server   127.0.0.1;
        # and even
        server   unix:/tmp/socket;
    }


-- 
Igor Sysoev
http://sysoev.ru/en/