[DRBD-user] DRBD9 drbdadm complains about fencing being in wrong section

Lars Ellenberg lars.ellenberg at linbit.com
Thu Feb 18 12:34:10 CET 2016

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

On Thu, Feb 18, 2016 at 12:29:49PM +0100, Roland Kammerer wrote:
> On Thu, Feb 18, 2016 at 10:01:02PM +1100, Adam Goryachev wrote:
> > While this really is very simple, and it looks awesome, the issue is that
> > most people will have existing data in existing drbd storage backed by
> > physical block devices. How do you propose this existing data can be moved?
> > 
> > Based on what you have said above, I really only see one option:
> > 
> > node1-n:$ vgcreate drbdpool ...
> > node1:$ drbdmanage init
> > node1:$ drbdmange add-node node2 IP
> > node1:$ drbdmange new-volume foo 10G --deploy 2
> > node1:$ dd if=/dev/drbdY/0 of=/dev/drbdX/0
> > Where /dev/drbdY is the old DRBD device that is not handled by drbdmanage and drbdX is the new one...
> > 
> > Then adjust whatever utility is used to export the data to use the
> > /dev/drbdX/0 instead of the old device. This just seems awkward, slow, and
> > cumbersome.....
> > 
> > Is there any better solution?
> No, there is no "import oldstuff" whatsoever feature. dd, restore a
> backup, what ever. That is the state of the art. It looks easy, but as
> always there are 10^23 corner cases and if we implement this "import
> magic", people expect it to work for their - I can't even imagine what
> crazy DRBD setups are out there - configurations.
> So again, it does not exist and I personally think if you jump to
> DRBD9/drbdmanage land you have to deal with it, you are the admin that
> knows your configuration best.

Of course, eventually we need to provide a more or less
convenient way to move 8.4 clusters to 9. And we will.

But for now, if you have an existing, working,
production DRBD 8.4 cluster, I see no reason at all
to move that to DRBD 9, not in this year anyways.

: Lars Ellenberg
: http://www.LINBIT.com | Your Way to High Availability
: DRBD, Linux-HA  and  Pacemaker support and consulting

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