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On Tue, Feb 15, 2005 at 08:36:34PM +0100, Simon Schwendemann wrote:
> hello everybody out there!
>
> it seems, that we have the same troubles
> described by Johan van der Berg earlier in this
> list...
>
> we're using a 2.6.10 kernel
> on two debian heartbeated/ldirectord boxes
> with two webservers (working very well, also
> in the offtime of the director - of course,
> we've tested this...)
>
> the symptom is simple - all sites are offline.
> in the ipvsadm -Ln output where normally 5-25
> active connections are living, 0-3 are listed
> as active, the amount of inactive connections
> seems to be still normally...the affected protocols
> are only http and https - pop,imap,smtp and other
> protocols we are running at the director seem
> to work without these offtimes...
>
> a tcpdump analysis showed us that sometimes the
> ACK packets are rewritten from the realserver ip
> to the vip, and sometimes (!!) _NOT_! maybe this
> is the reason, maybe there are also other issues!?
Are you using LVS-DR, and if so, how are you gaurding
against the real-servers advertising the VIP?
> there is a load of ~ 1mbit/s on the lvs-machines
> and the offline-time is about 1-10 minutes once
> a day, somedays up to 10 times a day...you cannot
> imagine how horrible this trouble is :-(
>
> we have already changed the complete hardware,
> played with configuration options...this trouble
> occurs at every lvs-nat setup i think...???
>
> does anybody know how to fix this problem?
> is there anyboy else having the same trouble?
>
> thanks in advance for your comments and help!
--
Horms
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