SNAT Confusion

[Joseph Mack NA3T]

On Fri, 16 Mar 2007, Rodre Ghorashi-Zadeh wrote:

> Hello,
>
> I have been able to get the "Janusz" patch to work on Fedora 
> 2.6.19-1.2288.2.4.fc5, but it looks like my problem still isn't solved. It 
> looks like this may be the time to explain my setup and requirement:
>
> I am in the situation where my real servers are clients of the VIP, and have 
> the potential to loop back via the director onto themselves. It is not a 
> problem if:
>
> realserver1 RIP -> Director VIP -> realserver2 RIP
>
> or:
>
> realserver2 RIP -> Director VIP -> realserver1 RIP
>
> but both:
>
> realserver1 RIP -> Director VIP -> realserver1 RIP
>
> and:
>
> realserver2 RIP -> Director VIP -> realserver2 RIP
>
> fail miserably.


people are always wanting the realserver to be a client of 
the VIP to balance a 2nd layer of requests. This is a little 
difficult to do with LVS. Since the first connection is 
already reasonably balanced, it occurs to me that the 2nd 
request can just stay on the realserver (eg LVS-DR, when the 
VIP is on the realserver). Possibly the 2nd connection won't 
be perfectly balanced, but for the trouble you have to go 
to, to get it balanced, would it be balanced well enough?

Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
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