On Tue, 2009-07-28 at 20:11 +0200, Andrea Dell'Amico wrote:
> Hello,
> I have a couple of Dell 2950 III, both of them with CentOS 5.3, Xen,
> drbd 8.2 and cluster suite.
> Hardware: 32DB RAM, RAID 5 with 6 SAS disks (one hot spare) on a PERC/6
> controller.
>
> I configured DRBD to use the main network interfaces (bnx2 driver), with
> bonding and crossover cables to have a direct link.
> The normal network traffic uses two different network cards.
> There are two DRBD resources for a total of a little less than 1TB.
>
> When the two hosts are in sync, if I activate more than a few (six or
> seven) xen guests, the master server crashes spectacularly and reboots.
>
> I've seen a kernel dump over the serial console, but the machine
> restarts immediately so I didn't write it down.
If you have an available pc, hook it up in place of the serial console
and start a terminal emulator, e.g. minicom or whatever you prefer, and
turn on full logging. This should save everyting in a file that you can
then review.
If it's a Windows based, just remember to get rid of the ^M with
dos2unix, or equivalent, after you send it to a *IX box.
I don't know anything about the rest of your problem, sorry.
>
> Unfortunately I cannot experiment because I have production services on
> those machines (and they are working fine until I start drbd on the
> slave).
>
> drbd configuration is attached.
>
> Anybody has an idea of the problem? The crash is perfectly reproducible,
> and drbd seems to be the problem (maybe the Xen kernel helps?).
>
> Thanks in advance,
> Andrea
> <snip sig stuff>
HTH
--
Bill
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