Hi,
On 12/19/18 8:55 PM, Marcus Müller wrote:
Hi all,
we’re running a ceph hammer cluster with 3 mons and 24 osds (3 same
nodes) and need to migrate all servers to a new datacenter and change
the IPs of the nodes.
I found this tutorial:
http://docs.ceph.com/docs/hammer/rados/operations/add-or-rm-mons/#changing-a-monitor-s-ip-address-the-messy-way regarding
the mons (should be easy) but nothing about the osds and which steps
to do if you need to shutdown and migrate the cluster to a new datacenter.
Has anyone some ideas, how to and which steps I need?
AFAIK the OSDs use ceph.conf to retrieve the mons' ip addresses. So
moving the mons to new address and updating ceph.conf prior to starting
the OSDs should do the trick.
You might run into other problems afterwards, especially if you are
using openstack. Cinder store the mon ip address in its database, and
you need to update them manually via SQL statements...
Regards,
Burkhard
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