> -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list- > bounces@xxxxxxxxxx] On Behalf Of Barry Brimer > Sent: Tuesday, November 27, 2007 3:35 PM > To: General Red Hat Linux discussion list > Subject: Re: Failover IP router > > Quoting Steven Buehler <steve@xxxxxxxxxxxx>: > > > I have been googleing for this, but can't seem to find the right > answer. > > What I am trying to do is to create a failover router on a redhat > box. > > 1. website.com will be on 2 servers > > 2. website.com has one IP address > > 3. redhat box router will have the 1 IP address for website.com on > it. > > 4. website.com server1 will be on 192.168.1.10 > > 5. website.com server2 will be on 192.168.1.11 > > 6. If website.com server1 fails, website.com server2 will take over. > > > > We are not worried about cookies that have been set on server1 to be > moved > > to server2. We are just worried about the second machine taking > over. What > > would be better is if it could be a load balancing setup so that it > will use > > both servers, but if one fails, people will not notice it because the > other > > server will then be taking all of the requests. > > > > I have googled for "Linux failover iptables router" and a few other > > combinations of words, but what I keep finding is failover for the > outbound > > connections. Having 3 Nic cards 1 going to one ISP, 1 going to > another ISP > > and one going to the internal network. Maybe I am just using the > wrong > > wording. Any url links for instructions would be appreciated. > > > > Thank You > > Steve > > I believe that you are looking for the load balancing portion of Red > Hat Cluster > Suite <http://www.redhat.com/cluster_suite/> > > Barry I found a page at http://linuxgazette.net/108/odonovan.html that says to use the following in the iptables: -A PREROUTING -i eth0 -p tcp --dport 80 -m state --state NEW -m nth --counter 0 --every 4 --packet 0 \ -j DNAT --to-destination 192.168.0.5:80 -A PREROUTING -i eth0 -p tcp --dport 80 -m state --state NEW -m nth --counter 0 --every 4 --packet 1 \ -j DNAT --to-destination 192.168.0.6:80 -A PREROUTING -i eth0 -p tcp --dport 80 -m state --state NEW -m nth --counter 0 --every 4 --packet 2 \ -j DNAT --to-destination 192.168.0.7:80 -A PREROUTING -i eth0 -p tcp --dport 80 -m state --state NEW -m nth --counter 0 --every 4 --packet 3 \ -j DNAT --to-destination 192.168.0.8:80 But I get errors because of the "-m nth". Because the servers are already setup, I was hoping that I wouldn't need to redo them for something like the RedHat Cluster Suit. That would require a re-install of the OS wouldn't it? I have never done the RH CS before and they are wanting this all done for a demo on Monday. Because of time constraints for the demo, I was hoping on something like the above that could just go into my iptables firewall. After the demo, we could go for something more elaborate like an appliance. Thanks Steve -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
