Open Stack

What is the best practice for adding more Ceph OSD's to kolla
in a production environment. Does deploy do anything to the existing
data or does it simply add the OSD's (and potentially increase the placement
groups if re-configured)? 

reconfigure doesnt touch newly prepared disks from what I see from the
code which is where I was expecting might have been done.

I am running kolla-ansible queens.

Thanks
Dave