Re[2]: Multiple load balancers problem

To: "Dmitry Akindinov" <dimak@xxxxxxxxxxx>
Subject: Re[2]: Multiple load balancers problem
Cc: "Julian Anastasov" <ja@xxxxxx>, lvs-devel@xxxxxxxxxxxxxxx
From: "Hans Schillstrom" <hans@xxxxxxxxxxxxxxx>
Date: Mon, 27 Aug 2012 22:43:41 +0200 (CEST)


>>      No loop? Because S2 will receive DR method in
>> the SYNC messages for its stack. You see traffic flow
>> or just that there is no reset?
>Yes, after the failover, all connections that were open on the S2 (which 
>now becomes the active balancer) do not reset and continue to function 
>just fine (traffic flow in both directions).
>We do understand (we think) your explanation about the sync table 
>problem  - the connections to the actual balancer are marked in a 
>special way, which causes problems when these connection table records 
>are used on a new balancer.
>It looks like updating the kernels is the only way, if (as you and Hans 
>Schillstrom outlines) even the latest CentOS/RedHat kernels do not 
>contain necessary patches. It's a pity, as the idea was to provide an 
>"out of the box" solution for our customers, and asking them to update 
>to some Linux kernel is not what they like to hear.
>But thank you very much in any case, we will update the kernels on our 
>test systems and will see if this (last?) problem disappears.

There is newer kernels floating around in the 3.x range
Have a look at ELRepo Project there you can find a 3.5.x kernel
that have all necessary changes.


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