RE: service connect to itself

Interesting.  I have 2 machines which act as the Real servers and one of course is the ldirectord hot while the other is standby and I am not using iptables.  This should fall under the "High Availability" example in the standard section which is also doing load balancing?? The Real servers are acting as gateway devices as well as load balancers.  This is running in RR formation with no issues.  My configuration is probably the simplest example so perhaps it doesnt apply to this issue.  Correct me if I am wrong and I hope this isnt just ignorance on my part.
 
R.

________________________________

From: [email protected] on behalf of Horms
Sent: Sun 9/11/2005 7:17 PM
To: [email protected]
Subject: Re: service connect to itself



On Sat, Sep 10, 2005 at 01:42:27PM -0700, Rick Willmore wrote:
> I am unclear on what this common problem is and am hoping someone can
> explain it to me.  I configured my HA set up without the use of
> iptables but perhaps my configuration is so simple that I didnt run
> into this problem.  I only have 2 servers with ldirectord running on
> the one but the traffic is definately load balanced. ie.. they see
> each other (looks very similar to chris's).  I ask this only because
> my configuration CANNOT go down so I want to make sure I understand
> any issues out there.

The problem is that when a real-server tries to connect the the VIP,
if you use LVS-NAT, then it probably will not be able to make a
connection, and if you use LVS-DR, then it will always connect
to itself. This does not effect hosts that are not real-servers.

LVS-NAT is used in the "Load Balancing" topologies listed under
Standard. LVS-DR is used in the topologies listed under
Advanced.

http://www.ultramonkey.org/3/topologies/

--
Horms


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