cephadm is a utility that is used to manage a Ceph cluster.

Here is a list of some of the things that cephadm can do:

  • cephadm can add a Ceph container to the cluster.

  • cephadm can remove a Ceph container from the cluster.

  • cephadm can update Ceph containers.

cephadm does not rely on external configuration tools like Ansible, Rook, or Salt. However, those external configuration tools can be used to automate operations not performed by cephadm itself. To learn more about these external configuration tools, visit their pages:

cephadm manages the full lifecycle of a Ceph cluster. This lifecycle starts with the bootstrapping process, when cephadm creates a tiny Ceph cluster on a single node. This cluster consists of one monitor and one manager. cephadm then uses the orchestration interface to expand the cluster, adding hosts and provisioning Ceph daemons and services. Management of this lifecycle can be performed either via the Ceph command-line interface (CLI) or via the dashboard (GUI).

To use cephadm to get started with Ceph, follow the instructions in Deploying a new Ceph cluster.

cephadm was introduced in Ceph release v15.2.0 (Octopus) and does not support older versions of Ceph.