cephadm: Make mgr/cephadm declarative
Pull request ID:
Make mgr/cephadm more like rook
- Make use of labels
- let mgr/cephadm read the labels + compare it to reality
- right now, we have a very simple scheduler
ceph cephadm push-config -i config.yaml
E.g the RGW config yaml should be stored in the persistent mon store in order to make it possible to simply deploy new RGWs without specifying the full config every time.