Part I. Ceph Configuration Reference

All Ceph clusters have a configuration, which defines:

A deployment tool such as ceph-deploy will typically create an initial Ceph configuration file for you. However, you can create one yourself if you prefer to bootstrap a cluster without using a deployment tool.

For your convenience, each daemon has a series of default values (i.e., many are set by ceph/src/common/config_opts.h). You may override these settings with a Ceph configuration file or at runtime via the monitor tell command or connecting directly to a daemon socket on a Ceph host.