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 <b...@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] > > > _______________________________________________ > drbd-user mailing list > drbd-user@lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > -- 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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