[Gluster-users] change IP address of working gluster cluster

[Jonathan Barber]

On 10 July 2014 09:51, Anders Blomdell <anders.blomdell at control.lth.se>
wrote:

> On 2014-07-10 10:11, Attila Heidrich wrote:
> > Hi!
> >
> > I have seen, that someone else is having tha same problem, but he
> received
> > no answer at all.
> > http://gluster.org/pipermail/gluster-users/2014-March/039421.html
> >
> > We have got the same problem. There are two NICs in all boxes, 1G and
> 10G,
> > and we started just the 1G, but now would like to use the other.
> >
> > IP addresses/networks are different (of course) and there are running
> > services in the cluster.
> >
> > Is there a way to work out this easily?
> >
> > I'm pretty sure I can add new nodes on the new network and later remove
> the
> > old ones, but it would be nicer to have some way for changing connect
> data
> > of the same nodes.
> If you want clients to use the 1G links, and servers to talk via the 10G
> links,
> 'ip route add <dest> src <1G address> dev <10G interface>' on all server
> might help.
>

Will that not cause asymmetric flows? The traffic will leave via the 10GbE
interface, but the destination IP is still the 1GbE interface, so it will
arrive at the 1GbE interface on the other host.

You can change the /etc/hosts entries, replacing the entries for the 1GbE
IP with the 10GbE IP and then restarting the gluster processes.

You could mess about with iptables and NAT, but I think at that point you
might as well add/remove the hosts.

I guess you can also update the configuration files under
/var/lib/glusterfs and rename the brick files... You might want to test
that first though :)

Cheers


> /Anders
>
> --
> Anders Blomdell                  Email: anders.blomdell at control.lth.se
> Department of Automatic Control
> Lund University                  Phone:    +46 46 222 4625
> P.O. Box 118                     Fax:      +46 46 138118
> SE-221 00 Lund, Sweden
>
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>



-- 
Jonathan Barber <jonathan.barber at gmail.com>
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