mirror of https://github.com/ceph/ceph
224 lines
5.0 KiB
ReStructuredText
224 lines
5.0 KiB
ReStructuredText
.. index:: control, commands
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=================
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Control commands
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=================
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Monitor commands
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----------------
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Monitor commands are issued using the ceph utility (in versions before
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Dec08 it was called cmonctl)::
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$ ceph [-m monhost] command
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where the command is usually of the form::
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$ ceph subsystem command
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System commands
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---------------
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::
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$ ceph stop
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Cleanly shuts down the cluster. ::
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$ ceph -s
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Shows an overview of the current status of the cluster. ::
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$ ceph -w
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Shows a running summary of the status of the cluster, and major events.
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AUTH subsystem
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--------------
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::
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$ ceph auth add <osd> <--in-file|-i> <path-to-osd-keyring>
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Add auth keyring for an osd. ::
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$ ceph auth list
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Show auth key OSD subsystem.
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OSD subsystem
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-------------
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::
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$ ceph osd stat
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Query osd subsystem status. ::
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$ ceph osd getmap -o file
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Write a copy of the most recent osd map to a file. See osdmaptool. ::
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$ ceph osd getcrushmap -o file
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Write a copy of the crush map from the most recent osd map to
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file. This is functionally equivalent to ::
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$ ceph osd getmap -o /tmp/osdmap
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$ osdmaptool /tmp/osdmap --export-crush file
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::
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$ ceph osd dump [--format format>]
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Dump the osd map. Valid formats for -f are "plain" and "json". If no
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--format option is given, the osd map is dumped as plain text. ::
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$ ceph osd tree [--format format]
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Dump the osd map as a tree with one line per osd containing weight
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and state. ::
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$ ceph osd crush add <id> <name> <weight> [<loc1> [<loc2> ...]]
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Add a new item with the given id/name/weight at the specified
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location. ::
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$ ceph osd crush remove <id>
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Remove an existing item from the crush map. ::
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$ ceph osd crush reweight <name> <weight>
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Set the weight of the item given by ``<name>`` to ``<weight>``. ::
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$ ceph osd cluster_snap <name>
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Create a cluster snapshot. ::
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$ ceph osd lost [--yes-i-really-mean-it]
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Mark an OSD as lost. This may result in permanent data loss. Use with caution. ::
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$ ceph osd create [<id>]
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Create a new OSD. If no ID is given, a new ID is automatically selected
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if possible. ::
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$ ceph osd rm [<id>...]
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Remove the given OSD(s). ::
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$ ceph osd getmaxosd
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Query the current max_osd parameter in the osd map. ::
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$ ceph osd setmap -i file
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Import the given osd map. Note that this can be a bit dangerous,
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since the osd map includes dynamic state about which OSDs are current
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on or offline; only do this if you've just modified a (very) recent
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copy of the map. ::
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$ ceph osd setcrushmap -i file
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Import the given crush map. ::
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$ ceph osd setmaxosd
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Set the max_osd parameter in the osd map. This is necessary when
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expanding the storage cluster. ::
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$ ceph osd down N
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Mark osdN down. ::
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$ ceph osd out N
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Mark osdN out of the distribution (i.e. allocated no data). ::
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$ ceph osd in N
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Mark osdN in the distribution (i.e. allocated data). ::
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$ ceph class list
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List classes that are loaded in the ceph cluster. ::
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$ ceph osd pause
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$ ceph osd unpause
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Set or clear the pause flags in the OSD map. If set, no IO requests
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will be sent to any OSD. Clearing the flags via unpause results in
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resending pending requests. ::
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$ ceph osd reweight N W
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Sets the weight of osdN to W. ::
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$ ceph osd reweight-by-utilization [threshold]
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Reweights all the OSDs by reducing the weight of OSDs which are
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heavily overused. By default it will adjust the weights downward on
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OSDs which have 120% of the average utilization, but if you include
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threshold it will use that percentage instead. ::
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$ ceph osd blacklist add ADDRESS[:source_port] [TIME]
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$ ceph osd blacklist rm ADDRESS[:source_port]
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Adds/removes the address to/from the blacklist. When adding an address,
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you can specify how long it should be blacklisted in seconds; otherwise
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it will default to 1 hour. A blacklisted address is prevented from
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connecting to any osd. Blacklisting is most often used to prevent a
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laggy mds making bad changes to data on the osds.
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These commands are mostly only useful for failure testing, as
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blacklists are normally maintained automatically and shouldn't need
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manual intervention. ::
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$ ceph osd pool mksnap POOL SNAPNAME
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$ ceph osd pool rmsnap POOL SNAPNAME
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Creates/deletes a snapshot of a pool. ::
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$ ceph osd pool create POOL
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$ ceph osd pool delete POOL
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Creates/deletes a storage pool. ::
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$ ceph osd pool set POOL FIELD VALUE
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Changes a pool setting. Valid fields are:
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* ``size``: Sets the number of copies of data in the pool.
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* ``pg_num``: TODO
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* ``pgp_num``: TODO
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::
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$ ceph osd scrub N
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Sends a scrub command to osdN. To send the command to all osds, use ``*``.
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TODO: what does this actually do ::
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$ ceph osd repair N
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Sends a repair command to osdN. To send the command to all osds, use ``*``.
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TODO: what does this actually do
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MDS subsystem
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-------------
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Change configuration parameters on a running mds. ::
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$ ceph mds tell <mds-id> injectargs '--<switch> <value> [--<switch> <value>]'
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Example::
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$ ceph mds tell 0 injectargs '--debug_ms 1 --debug_mds 10'
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Enables debug messages. ::
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$ ceph mds stat
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Displays the status of all metadata servers.
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set_max_mds: TODO
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