Thanks, Rich!
that did the trick... This is one of the reasons I really like
these lists - it would have never occurred to me that it was time
related!
Thanks,
Kevin
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Rich Graves
Sent: Friday, July 11, 2008 3:24 PM
To: [email protected]
Subject: RE: [rhelv5-list] Ping fails after Xen live migration
I think this is just a clock issue. Pings include timestamps and
sequence numbers, and /proc/sys/net/ipv4/icmp_ratelimit does as the name
suggests.
On the domU guest, echo 1 > /proc/sys/xen/independent_wallclock
Do the live migration
Then echo 0 > /proc/sys/xen/independent_wallclock
I bet your clock and ping issues will both be resolved.
Not yet tested (by me): does setting independent_wallclock on the dom0's
do anything? That would be nice, because then you wouldn't have to take
the time to ssh to guests before live migrates. (Anyone else have a good
workaround? Is there any way to give user-space a hint that the kernel
is starting a live migrate?)
Frequently suggested but not desired (by me): use independent_wallclock
all the time, and run NTP in each domU.
--
Rich Graves http://claimid.com/rcgraves
Carleton.edu Sr UNIX and Security Admin
CMC135: 507-646-7079 Cell: 952-292-6529
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