[DRBD-user] Migration from drbdmanage to linstor?

[Roland Kammerer]

On Wed, Aug 15, 2018 at 10:22:03AM +0200, Frank Rust wrote:
> Hi all,
> since drbdmanage will reach its end-of-life at the end of this year,
> it is time to think about migration to linstor.
> 
> I have a small cluster with 7 nodes, three of them with disks of about
> 30TB each.  The storage is about 70% filled. 
> 
> Since it is no option to start linstor from scratch, how would I
> migrate all of my storage to the new system? All documents I see start
> with "create drbdpool"...
> 
> Thanks in advance, Frank

Hi,

the next linstor-client release, which will happen real soon now,
contains an updated "dm-migrate" subcommand. You feed it a dump of the
drbdmange control volume an it generates a script that you can review
and execute. When the release is done, I also push an update to the
users-guide (already written, but not public as of now).

I tested this thing with all permutations of:
1 to 3 nodes,
1 or 2 volumes in a resource
0 to N-1 (N is #nodes) diskless assignments
a drbdsetup option of "every group" (disk, peer-device,...) on the
resource.

All these resources got created via drbdmanage and then got migrated to
linstor via the script created from "dm-migrate". Yes, it worked ;-).
And you have zero downtime.

Regards, rck