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hi
Horms wrote:
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?
No, I forgot to add we are using lvs-nat, I think this problem affects
only lvs-nat setups (?) ...
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!
--
mit freundlichen gruessen / with best regards
simon schwendemann
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