[Gluster-users] How to upgrade/re-install the OS on a gluster server?

Dan Lavu dan at redhat.com
Fri Aug 12 15:10:12 UTC 2016

Thanks Joe for the confirmation, cheers, have a good weekend.

On Thu, Aug 11, 2016 at 5:17 PM, Joe Julian <joe at julianfamily.org> wrote:

> On 08/11/2016 02:05 PM, Gandalf Corvotempesta wrote:
> Il 11 ago 2016 7:21 PM, "Dan Lavu" <dan at redhat.com> ha scritto:
> >
> > Is it possible? Looking at everything, it just seems like I need the
> content of the bricks and whatever is in /etc/glusterd and
> /var/lib/glusterd maintaining the same hostname, IP and the same Gluster
> version?
> >
> >
> Why not start from scratch and let gluster to heal when you add the
> upgraded node back to the cluster?
> Because "start from scratch" means changing hostnames. When you've got a
> strategy for naming hosts, assigning a hostname that doesn't fit that
> strategy breaks consistency. When you're managing hosts in 6 datacenters on
> 4 contenents, consistent naming is critical.
> Having consistent names makes automated deployment (or redeployment) much
> easier to code when you're using mgmt, saltstack, ansible, puppet or even
> chef. This is also the same reason I use consistent naming for brick
> directories.
> Gluster has never written replacement tools with same hostname and path as
> a possibility meaning that replace-brick doesn't work. Without being able
> to use replace-brick, self-heal doesn't know to heal that one single brick
> so heal...full is needed. Replace-brick is being changed to allow in-place
> replacement and solve that problem. Until then, Dan's process is perfectly
> reasonable and is the process that I use (more or less, I actually just
> template glusterd.info and rely on the sync process to fill the rest of
> /var/lib/glusterd).
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