Thanks to all!
Everything worked like a charm:
1) Stopped the cluster (I guess it's faster than moving OSDs one by one)
2) Unmounted OSDs and fixed fstab entries for them
3) Renamed the MON and OSD folders
4) Renamed config file and keyrings, fixed paths to keyrings in config
5) Mounted OSDs back (mount -a)
6) Started everything
7) Fixed path to config in nova.conf, cinder.conf and glance-api.conf
all over the OpenStack
Everything works as expected. It took about half an hour to do all the job.
Again, thanks to all!
Regards, Vasily.
2015-08-19 15:10 GMT+08:00 Межов Игорь Александрович me...@yuterra.ru:
Hi!
I think, that renaming cluster - is not only mv config file. We try to
change name of test Hammer
cluster, created with ceph-deploy and got some issues.
In default install, naming of many parts are derived from cluster name. For
example, cephx keys are
stored not in ceph.client.admin.keyring, but
$CLUSTERNAME.client.admin.keyring, so we
have to rename keyrings also.
The same thing is for OSD/MON mounting points: instead
/var/lib/ceph/osd/ceph-$OSDNUM,
after renaming cluster, daemons try to run OSD from
/var/lib/ceph/osd/$CLUSTERNAME-$OSDNUM.
Of course, there are no such mountpoints and we manually create them, mount
fs and re-run OSDs.
There is one unresolved issue with udev rules: after node reboot,
filesystems are mounted by udev
into the old mountpoints. As the cluster is for testing - this is not a big
thing.
So, be carefull while renaming production or loaded cluster.
PS: All above is my IMHO and I may be wrong. ;)
Megov Igor
CIO, Yuterra
От: ceph-users ceph-users-boun...@lists.ceph.com от имени Jan Schermer
j...@schermer.cz
Отправлено: 18 августа 2015 г. 15:18
Кому: Erik McCormick
Копия: ceph-users@lists.ceph.com
Тема: Re: [ceph-users] Rename Ceph cluster
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 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 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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