thanks Anup for your help, i finally did get lvs-nat working: the "/proc/../ip_forwarding was not set properly. My next step is to do LVS-TUN, and i'm stumped on which way to start. I will have 3 internet network connection on the load balancer #1 official load balancer (where the webserver dns is pointed to) eth0 #2 eth1, which will have a tun? to connect to a geographical web server #2 eth2, which is the same as eth1, but a different web server. so naturally, I need to do an LVS-NAT, BUT. can I have tunneling with that as well? And as far as I know, I don't have to worry about the arp... William On Jan 3, 2008 6:48 PM, Anup Shukla <anup.shkl at gmail.com> wrote: > William Ottley wrote: > > i'm trying to setup LVS, and tried both the lvs-dr and the lvs-nat, > > but can't get any to work. > > LVS-DR did work for me partially, as-in it did not load balance. > But i am sure it was a mistake on my part. Still have to find time and > test it. > > > #1 with regards to the Real Servers, is there anything that needs to > > be configured other that the http service? I ask this, because I > > suspect yes, and it has to do with what type of LVS you have: > > The http service + firewall rules (if applicable) > > > > > 1a) lvs-dr: on the RIP of the web servers, create an lo:0 and assign > > the VIP to it > > Yes. > > > 1b ) lvs-nat: on the RIP of the web servers, make sure the default gw > > points to the inside network card eth1 > > I have found that the default gw is not really a strict requirement. > Worked for me with a different gw too, but i cannot stamp a confirmation > on that. Got to recheck... just in case. > > > 1b) lvs-nat: on the LVS, with 2 nics, eth1 (private where web servers > > are located): 192.168.0.100, and create a nat gateway of > > 192.168.0.254, where the real web servers gw is, and make it eth1:1 > > Looks Good. > > > > > how do I go about getting diagnostic info from all this? pulse? i > > can't connect at all to any of the web servers.. > > 1. Are real servers accessible from lvs (ping/arp -n?) > 2. Does telnet to port 80 (or the one to which http server is listening > to) on real server from lvs work? > > if #1 == yes and #2 == no, it might be the firewall on the real servers. > > -- > Regards > Anup Shukla > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- --------------- Morpheus: After this, there is no turning back. You take the blue pill - the story ends, you wake up in your bed and believe whatever you want to believe. You take the red pill - you stay in Wonderland and I show you how deep the rabbit-hole goes.