I think it's pretty clear:
http://ceph.com/docs/master/install/manual-deployment/
"For example, when you run multiple clusters in a federated architecture, the
cluster name (e.g., us-west, us-east) identifies the cluster for the current
CLI session. Note: To identify the cluster name on the command line interface,
specify the a Ceph configuration file with the cluster name (e.g., ceph.conf,
us-west.conf, us-east.conf, etc.). Also see CLI usage (ceph --cluster
{cluster-name})."
But it could be tricky on the OSDs that are running, depending on the
distribution initscripts - you could find out that you can't "service ceph stop
osd..." anymore after the change, since it can't find it's pidfile anymore.
Looking at Centos initscript it looks like it accepts "-c conffile" argument
though.
(So you should be managins OSDs with "-c ceph-prod.conf" now?)
Jan
> On 18 Aug 2015, at 14:13, Erik McCormick <emccorm...@cirrusseven.com> wrote:
>
> I've got a custom named cluster integrated with Openstack (Juno) and didn't
> run into any hard-coded name issues that I can recall. Where are you seeing
> that?
>
> As to the name change itself, I think it's really just a label applying to a
> configuration set. The name doesn't actually appear *in* the configuration
> files. It stands to reason you should be able to rename the configuration
> files on the client side and leave the cluster alone. It'd be with trying in
> a test environment anyway.
>
> -Erik
>
> On Aug 18, 2015 7:59 AM, "Jan Schermer" <j...@schermer.cz
> <mailto:j...@schermer.cz>> wrote:
> This should be simple enough
>
> mv /etc/ceph/ceph-prod.conf /etc/ceph/ceph.conf
>
> No? :-)
>
> Or you could set this in nova.conf:
> images_rbd_ceph_conf=/etc/ceph/ceph-prod.conf
>
> Obviously since different parts of openstack have their own configs, you'd
> have to do something similiar for cinder/glance... so not worth the hassle.
>
> Jan
>
> > On 18 Aug 2015, at 13:50, Vasiliy Angapov <anga...@gmail.com
> > <mailto:anga...@gmail.com>> wrote:
> >
> > Hi,
> >
> > Does anyone know what steps should be taken to rename a Ceph cluster?
> > Btw, is it ever possbile without data loss?
> >
> > Background: I have a cluster named "ceph-prod" integrated with
> > OpenStack, however I found out that the default cluster name "ceph" is
> > very much hardcoded into OpenStack so I decided to change it to the
> > default value.
> >
> > Regards, Vasily.
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