Connection table clears and ipvsadm stops distributing the load
Hildebrand, Nils, 122
Nils.Hildebrand at bamf.bund.de
Thu Aug 31 08:43:10 BST 2006
I am using ipvsadm 1.24 (compiled with getopt_long and IPVS 1.2.1) on a
22.214.171.124-21.11 Linux Kernel (SuSE pro 9.3 patch-update April 2006).
We are doing load-balancing for http with DR/WLC and had a persistency of
one hour. After we raised the persistency to 8 hours and later reduced it to
3 hours we ran into a strange problem:
After some time "ipvsadm -Lc" does not show any connections, while all
connections go to only one real server (the other real server is not
contacted any longer).
The weight of both real-servers is about 36690 mostly the same all the time.
We are using lvs-kiss to check the load and availability of the
real-servers, which in turn adjusts the weigth of the real servers or
disables them when down.
Is this behaviour known?
IMHO this smells like some table-overflow...
Kind regards, Nils
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