Gluster users - Oct 2015 - Suggested method for replacing an entire node

On 10/07/2015 10:28 PM, Gene Liverman wrote:
> I want to replace my existing CentOS 6 nodes with CentOS 7 ones. Is
> there a recommended way to go about this from the perspective of
> Gluster? I am running a 3 node replicated cluster (3 servers each with 1
> brick). In case it makes a difference, my bricks are on separate drives
> formatted as XFS so it is possible that I can do my OS reinstall without
> wiping out the data on two nodes (the third had a hardware failure so it
> will be fresh from the ground up).
That's possible. You could do the re-installation one at a time. Once
the node comes back online self heal daemon will take care of healing
the data. AFR team can correct me if I am wrong.

Thanks,
Atin
> 
> 
> 
> 
> Thanks,
> *Gene Liverman*
> Systems Integration Architect
> Information Technology Services
> University of West Georgia
> gliverma at westga.edu <mailto:gliverma at westga.edu>
> 
> ITS: Making Technology Work for You!
> 
> 
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users
>

I think you should back up /var/lib/glusterd and then restore it after the
reinstall and installation of glusterfs packages.  Assuming the node will
have the same hostname and ip addresses and you are installing the same
version gluster bits, I think it should be fine.  I am assuming you are not
using ssl for the connections if so you will need to back up the keys for
that too.

-Alastair

On 8 October 2015 at 00:12, Atin Mukherjee <amukherj at redhat.com> wrote:
>
>
> On 10/07/2015 10:28 PM, Gene Liverman wrote:
> > I want to replace my existing CentOS 6 nodes with CentOS 7 ones. Is
> > there a recommended way to go about this from the perspective of
> > Gluster? I am running a 3 node replicated cluster (3 servers each with
1
> > brick). In case it makes a difference, my bricks are on separate
drives
> > formatted as XFS so it is possible that I can do my OS reinstall
without
> > wiping out the data on two nodes (the third had a hardware failure so
it
> > will be fresh from the ground up).
> That's possible. You could do the re-installation one at a time. Once
> the node comes back online self heal daemon will take care of healing
> the data. AFR team can correct me if I am wrong.
>
> Thanks,
> Atin
> >
> >
> >
> >
> > Thanks,
> > *Gene Liverman*
> > Systems Integration Architect
> > Information Technology Services
> > University of West Georgia
> > gliverma at westga.edu <mailto:gliverma at westga.edu>
> >
> > ITS: Making Technology Work for You!
> >
> >
> > _______________________________________________
> > Gluster-users mailing list
> > Gluster-users at gluster.org
> > http://www.gluster.org/mailman/listinfo/gluster-users
> >
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users
>
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