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99 lines
2.1 KiB
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99 lines
2.1 KiB
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==========================================
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ceph -- ceph file system control utility
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==========================================
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.. program:: ceph
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Synopsis
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========
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| **ceph** [ -m *monaddr* ] [ -w | *command* ... ]
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Description
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===========
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**ceph** is a control utility for communicating with the monitor
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cluster of a running Ceph distributed file system.
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There are three basic modes of operation.
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Interactive mode
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----------------
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To start in interactive mode, no arguments are necessary. Control-d or
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'quit' will exit.
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Watch mode
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----------
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Watch mode shows cluster state changes as they occur. For example::
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ceph -w
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Command line mode
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-----------------
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Finally, to send a single instruction to the monitor cluster (and wait
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for a response), the command can be specified on the command line.
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Options
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=======
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.. option:: -i infile
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will specify an input file to be passed along as a payload with the
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command to the monitor cluster. This is only used for specific
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monitor commands.
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.. option:: -o outfile
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will write any payload returned by the monitor cluster with its
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reply to outfile. Only specific monitor commands (e.g. osd getmap)
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return a payload.
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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 startup.
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.. option:: -m monaddress[:port]
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Connect to specified monitor (instead of looking through ceph.conf).
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Examples
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========
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To grab a copy of the current OSD map::
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ceph -m 1.2.3.4:6789 osd getmap -o osdmap
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To get a dump of placement group (PG) state::
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ceph pg dump -o pg.txt
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Monitor commands
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================
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A more complete summary of commands understood by the monitor cluster can be found in the
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online documentation, at
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http://ceph.com/docs/master/rados/operations/control
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Availability
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============
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**ceph** is part of the Ceph distributed file system. Please refer to the Ceph documentation at
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http://ceph.com/docs for more information.
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See also
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========
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:doc:`ceph <ceph>`\(8),
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:doc:`mkcephfs <mkcephfs>`\(8)
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