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Re: [lvs-users] [solved] Problems after upgrade to 2.6.33

To: Jan Kasprzak <kas@xxxxxxxxxx>
Subject: Re: [lvs-users] [solved] Problems after upgrade to 2.6.33
Cc: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
From: Simon Horman <horms@xxxxxxxxxxxx>
Date: Wed, 17 Mar 2010 08:24:08 +1100
On Tue, Mar 16, 2010 at 08:28:53AM +0100, Jan Kasprzak wrote:
>       Hello,
> 
> I have solved this problem:
> 
> Jan Kasprzak wrote:
> : I have two IPVS hosts (with heartbeat), managing about 20 virtual services
> : with ~150 workers. I use ldirectord, direct routing, wrr and wlc schedulers.
> : After upgrading one of the IPVS hosts to 2.6.33 (from 2.6.30),
> : I am experiencing problems - the workers are being removed and 
> : re-added by ldirectord frequently, and sometimes even the whole
> : virtual service stalls and is redirected to the fallback server.
> 
>       There were actually two problems: the first one is that
> ipvsadm-1.25 from Fedora 12 reports zero active connections no matter what.
> Replacing the /sbin/ipvsadm binary with 1.24 from Fedora 10 fixes the
> problem.

Hi Jan,

this sounds a lot like the problem that this patch fixes.

http://archive.linuxvirtualserver.org/html/lvs-devel/2010-02/msg00006.html

> 
>       The other problem turned out to be a PEBKC case: I wanted
> to have the new system as close to the distribution setup as possible,
> so I have even left a Fedora iptables setup in place. This (the stateful
> filter in particular) does not go well with IPVS direct routing.
> The IPVS host has been dropping the TCP FIN packets, and the worker servers
> were soon filled with connections wanting to close, but not receiving
> the TCP FIN from the other side :-(.
> 
> -Yenya
> 
> -- 
> | Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
> | GPG: ID 1024/D3498839      Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
> | http://www.fi.muni.cz/~kas/    Journal: http://www.fi.muni.cz/~kas/blog/ |
> Please don't top post and in particular don't attach entire digests to your
> mail or we'll all soon be using bittorrent to read the list.     --Alan Cox
> 
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