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infernix wrote:
> No, not really. Look at the twake or tcpdump logs; the realserver keeps
> retransmitting the TCP packets but the client doesn't seem to tie them
> to the active TCP session (regardless of what client is used, whether a
> local address in the public range or any random public IP on the
> internet). So it seems that something is going wrong with the TCP
> session.
And so I had another look at the output - this time in wiresharks GUI
mode - and noticed TCP checksum errors on all the packets sent *to* the
client.
Had I read LVS-HOWTO.virtualised_realservers.html I would've known that
on Xen there is an issue with tcp checksumming messing it all up. So I
disabled rx checksums with ethtool on the ethX interfaces of the
director and realservers, and all was well with the world again. I
probably should've mentioned that all machines in this test scenario are
Xen VMs :)
infernix
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