From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thornton Prime <theoszi@gmail.com>
Subject: Re: loadbalncer using iptables
Date: Wed, 9 Mar 2005 05:35:29 -0800
Message-ID: <2d7eccf505030905356231091b@mail.gmail.com>
References: <d0ml9j$e3h$1@sea.gmane.org>
Reply-To: thornton@yoyoweb.com
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
In-Reply-To: <d0ml9j$e3h$1@sea.gmane.org>
Sender: linux-admin-owner@vger.kernel.org
List-Id: <linux-admin.vger.kernel.org>
Content-Type: text/plain; charset="us-ascii"
To: muruganandam@softhome.net
Cc: linux-admin@vger.kernel.org

> I build a loadbalancer using DNAT.
> iptables -t nat -A PREROUTING -s 10.10.10.254 -d 192.168.0.3 -p tcp
> --dport 80 -j DNAT --to-destnation 172.18.10.1
> i need to use anonther real server 172.18.10.2 for the next request in a
> round robin fashion.

You can add a match like "-m nth --every 2", but you probably want to
look at LinuxVirtualServer.org, which implements a real load balancer
using netfilter. There is support for peristent connections, weights,
adding in health checks, and all sorts of other features.

thornton