ceph-mon - ceph monitor daemon
ceph-mon -i monid [ --mon-data mondatapath ]
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.
refers to a directory on a local file system storing
monitor data. It is normally specified via the mon data
option in the
- -f, --foreground
- Foreground: do not daemonize after startup (run in
foreground). Do not generate a pid file. Useful when run via
- Debug mode: like -f, but also send all log output to
- --setuser userorgid
- Set uid after starting. If a username is specified, the
user record is looked up to get a uid and a gid, and the gid is also set
as well, unless --setgroup is also specified.
- --setgroup grouporgid
- Set gid after starting. If a group name is specified the
group record is looked up to get a gid.
- -c ceph.conf, --conf=ceph.conf
- Use ceph.conf configuration file instead of the
default /etc/ceph/ceph.conf to determine monitor addresses during
- 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:
- The cluster fsid. This can come from a monmap (--monmap
<path>) or explicitly via --fsid <uuid>.
- A list of monitors and their addresses. This list of
monitors can come from a monmap ( --monmap <path>), the
mon host configuration value (in ceph.conf or via -m
host1,host2,...), or mon addr lines in ceph.conf. If
this monitor is to be part of the initial monitor quorum for a new Ceph
cluster, then it must be included in the initial list, matching either the
name or address of a monitor in the list. When matching by address, either
the public addr or public subnet options may be
- The monitor secret key mon.. This must be included
in the keyring provided via --keyring <path>.
- Specify a keyring for use with --mkfs.
is part of Ceph, a massively scalable, open-source, distributed
storage system. Please refer to the Ceph documentation at
for more information.
ceph(8), ceph-mds(8), ceph-osd(8)
2010-2017, Inktank Storage, Inc. and contributors. Licensed under Creative