[DRBD-user] Problems using image files with drbd, maybe unsupported?

Martin Fandel pingu.freak at gmx.de
Wed Oct 6 10:51:54 CEST 2010

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


hearbeat does the same as I do in the following steps:

drbd disconnect all
drbd primary all
mount /dev/drbd0 /var/lib/xen/images

However, in a heartbeat environment, the xen images are also damaged. If the primary node fails, all xen images located in /var/lib/xen/images are inconsistent and not bootable. 

I can avoid this by using fsck on the images. But I don't know how use fsck on image files. Does anybody know this?




-------- Original-Nachricht --------
> Datum: Tue, 5 Oct 2010 21:59:06 +0200
> Von: Bart Coninckx <bart.coninckx at telenet.be>
> An: drbd-user at lists.linbit.com
> CC: "Martin Fandel" <pingu.freak at gmx.de>
> Betreff: Re: [DRBD-user] Problems using image files with drbd, maybe unsupported?

> On Tuesday 05 October 2010 12:26:08 Martin Fandel wrote:
> > Hi,
> > 
> > I'm not sure if I understand the documentation correct. I've installed
> > SLES10 with DRBD and Xen. I added an drbd-device /dev/drbd0 for the xen
> > image files. The drbd device /dev/drbd0 is created with ext3 and is
> > mounted to /var/lib/xen/images. Under this directory, 10 vms are
> > installed. If I do an switch to the backup machine, xen can't start the
> > image files / the guest. The kernel says:
> > 
> > [87585.519596] EXT3-fs: INFO: recovery required on readonly filesystem.
> > [87585.519602] EXT3-fs: write access unavailable, cannot proceed.
> > 
> > Is it possible, that image files with drbd are not supported? I've also
> > found an tutorial on google. In the tutorial is a notice, that the image
> > files must be dumped to dedicated drbd partitions?
> > 
> > Thanks!
> > 
> > Regards,
> > 
> > Martin
> You need to install the heartbeat rpms for SLES10 and configure DRBD
> resources 
> so the DRBD resource becomes active after failover.
> B.

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