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84 lines
2.5 KiB
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84 lines
2.5 KiB
ReStructuredText
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=================================
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ceph-mon -- ceph monitor daemon
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=================================
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.. program:: ceph-mon
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Synopsis
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========
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| **ceph-mon** -i *monid* [ --mon-data *mondatapath* ]
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Description
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===========
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**ceph-mon** is the cluster monitor daemon for the Ceph distributed
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file system. One or more instances of **ceph-mon** form a Paxos
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part-time parliament cluster that provides extremely reliable and
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durable storage of cluster membership, configuration, and state.
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The *mondatapath* refers to a directory on a local file system storing
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monitor data. It is normally specified via the ``mon data`` option in
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the configuration file.
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Options
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=======
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.. option:: -f, --foreground
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Foreground: do not daemonize after startup (run in foreground). Do
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not generate a pid file. Useful when run via :doc:`ceph-run <ceph-run>`\(8).
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.. option:: -d
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Debug mode: like ``-f``, but also send all log output to stderr.
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.. option:: -c ceph.conf, --conf=ceph.conf
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Use *ceph.conf* configuration file instead of the default
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``/etc/ceph/ceph.conf`` to determine monitor addresses during
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startup.
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.. option:: --mkfs
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Initialize the ``mon data`` directory with seed information to form
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and initial ceph file system or to join an existing monitor
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cluster. Three pieces of information must be provided:
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- The cluster fsid. This can come from a monmap (``--monmap <path>``) or
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explicitly via ``--fsid <uuid>``.
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- A list of monitors and their addresses. This list of monitors
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can come from a monmap (``--monmap <path>``), the ``mon host``
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configuration value (in *ceph.conf* or via ``-m
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host1,host2,...``), or ``mon addr`` lines in *ceph.conf*. If this
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monitor is to be part of the initial monitor quorum for a new
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Ceph cluster, then it must be included in the initial list,
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matching either the name or address of a monitor in the list.
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When matching by address, either the ``public addr`` or ``public
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subnet`` options may be used.
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- The monitor secret key ``mon.``. This must be included in the
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keyring provided via ``--keyring <path>``.
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.. option:: --keyring
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Specify a keyring for use with ``--mkfs``.
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Availability
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============
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**ceph-mon** is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer
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to the Ceph documentation at http://ceph.com/docs for more
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information.
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See also
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========
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:doc:`ceph <ceph>`\(8),
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:doc:`ceph-mds <ceph-mds>`\(8),
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:doc:`ceph-osd <ceph-osd>`\(8)
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