Hi,
At the moment scaling up ceph nodes is potentially supported (but apparently not tested, at least not as part of CI).
This bug is to track getting first class support for scaling up ceph nodes, and first class support of scaling down ceph nodes (for example, removing old hardware)
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHEA-2017:1245