[DRBD-user] DRBD 8.4.5 + userspace drbd tools 8.4.3

Adam Randall randalla at gmail.com
Thu Apr 23 19:44:09 CEST 2015

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


I've been curious about this too as we are in the same boat with Gentoo.

On Thu, Apr 23, 2015 at 5:32 AM, Jean-Francois Maeyhieux <b4b1 at free.fr>
wrote:

>
> We are using a ganeti cluster in production environment using a
> classical KVM/LVM/DRBD stack using dedicated 10gbs nics for drbd
> synchonization.
>
>
> Everything works fine and currently host system specs are:
> - Gentoo Linux
> - Kernel 3.14.x
> - DRBD: version: 8.4.3 (api:1/proto:86-101)
> - Userspace drbd tools: sys-cluster/drbd-8.4.3
>
>
> Since there is not yet drbd userspace tools > 8.4.3 available in Gentoo
> portage, we wonder if it could be possible to use:
> - a more recent kernel (3.18.x) that will bring an in kernel DRBD 8.4.5
> - with the same userspace drbd tools 8.4.3 version
>
> On a test host with a recent 3.19.x kernel, /proc/drbd exposed the same
> API:
> version: 8.4.5 (api:1/proto:86-101)
>
> So I think kernel upgrade is possible. Is DRBD API the only important
> version to check for drbd kernel/userspace part compatibility ?
>
> We plan to do an upgrade using this path:
> - evacuate VM from node to upgrade
> - remove note to upgrade from cluster (so stop DRBD sync on secondary
> devices)
> - update kernel on node to upgrade with new DRBD 8.4.5
> - re-add the upgraded node in the cluster and so let drbd synchonize:
>   - from primary devices on 8.4.3 kernel host
>   - to secondary devices on 8.4.5 kernel host
>
> Is this path correct ?
> Any advices about such an upgrade ?
>
>
> Thanks
> --
> Jean-Francois Maeyhieux [Zentoo]
>
>
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-- 
Adam Randall
http://www.xaren.net
AIM: blitz574
Twitter: @randalla0622

"To err is human... to really foul up requires the root password."
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