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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
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+
+=================================
+ ceph-mon -- ceph monitor daemon
+=================================
+
+.. program:: ceph-mon
+
+Synopsis
+========
+
+| **ceph-mon** -i *monid* [ --mon-data *mondatapath* ]
+
+
+Description
+===========
+
+**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.
+
+Options
+=======
+
+.. option:: -f, --foreground
+
+ Foreground: do not daemonize after startup (run in foreground). Do
+ not generate a pid file. Useful when run via :doc:`ceph-run <ceph-run>`\(8).
+
+.. option:: -d
+
+ Debug mode: like ``-f``, but also send all log output to stderr.
+
+.. option:: --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.
+
+.. option:: --setgroup grouporgid
+
+ Set gid after starting. If a group name is specified the group
+ record is looked up to get a gid.
+
+.. option:: -c ceph.conf, --conf=ceph.conf
+
+ Use *ceph.conf* configuration file instead of the default
+ ``/etc/ceph/ceph.conf`` to determine monitor addresses during
+ startup.
+
+.. option:: --mkfs
+
+ 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 (for backward compatibility) the deprecated ``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 used.
+ - The monitor secret key ``mon.``. This must be included in the
+ keyring provided via ``--keyring <path>``.
+
+.. option:: --keyring
+
+ Specify a keyring for use with ``--mkfs``.
+
+.. option:: --no-config-file
+
+ Signal that we don't want to rely on a *ceph.conf*, either user provided
+ or the default, to run the daemon. This will entail providing all
+ necessary options to the daemon as arguments.
+
+Availability
+============
+
+**ceph-mon** is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer
+to the Ceph documentation at http://ceph.com/docs for more
+information.
+
+
+See also
+========
+
+:doc:`ceph <ceph>`\(8),
+:doc:`ceph-mds <ceph-mds>`\(8),
+:doc:`ceph-osd <ceph-osd>`\(8)