[DRBD-user] Kernel panic with CentOS 6.0, drbd, pacemaker

Peter Hinse loco at d0pefish.de
Sun Aug 28 17:44:28 CEST 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Am 24.08.2011 16:17, schrieb Lars Ellenberg:

>> Same happens with drbd83 and drbd84 packages from elrepo and with a
>> self-compiled drbd84 from linbit sources.
>
> I don't think this is anything DRBD specific.
>
> The Oops happens from drbdadm, which is a normal user space tool,
> when doing some ioctl on apparently some socket.
>
> Doing some ioctl on some socket file descriptor from userland
> should not be able to trigger an oops.
>
> Try to search for similar symptoms not involving DRBD.

I hope I sorted it out by re-creating the cluster with cman plus 
corosync and pacemaker and without the dlm-pcmk and gfs-pcmk packages. 
The drbd config however remained the same. Whenever I reboot single 
servers now or go into standby, no further kernel panics occur.

[...]

> This is a "fair weather setup".  It will fail (aka: behave in strange
> and unexpected ways) when things go wrong.
>
> Getting a DRBD dual-primary cluster file system setup to work reliably
> in face of errors is a bit more complex.
>
> And you really need fencing (stonith).

You are right, I forgot to mention that this is a test setup.

Regards,

	Peter



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