This document is for a development version of Ceph.
The cephadm MGR service is hosting different modules, like the Ceph Dashboard and the cephadm manager module.
The MGR service supports binding only to a specific IP within a network.
example spec file (leveraging a default placement):
service_type: mgr networks: - 22.214.171.124/24
Allow co-location of MGR daemons¶
In deployment scenarios with just a single host, cephadm still needs
to deploy at least two MGR daemons. See
the ceph-mgr administrator’s guide for further details.