ceph-mon is the cluster monitor daemon for the Ceph distributed file system. One or more instances of ceph-mon form a Paxos part-time parliament cluster that provides extremely reliable and durable storage of cluster membership, configuration, and state.
The mondatapath refers to a directory on a local file system storing monitor data. It is normally specified via the mon data option in the configuration file.
Foreground: do not daemonize after startup (run in foreground). Do not generate a pid file. Useful when run via ceph-run(8).
Debug mode: like -f, but also send all log output to stderr.
Use ceph.conf configuration file instead of the default /etc/ceph/ceph.conf to determine monitor addresses during startup.
Initialize the mon data directory with seed information to form and initial ceph file system or to join an existing monitor cluster. Three pieces of information must be provided:
Specify a keyring for use with --mkfs.
ceph-mon is part of the Ceph distributed file system. Please refer to the Ceph documentation at http://ceph.com/docs for more information.