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https://github.com/ceph/ceph
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80 lines
3.6 KiB
ReStructuredText
80 lines
3.6 KiB
ReStructuredText
=====================
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Operating a Cluster
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=====================
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The ``ceph`` process provides functionality to **start**, **restart**, and
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**stop** your Ceph cluster. Each time you execute ``ceph``, you must specify at
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least one option and one command. You may also specify a daemon type or a daemon
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instance. For most newer Debian/Ubuntu distributions, you may use the following
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syntax::
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sudo service ceph [options] [commands] [daemons]
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For older distributions, you may wish to use the ``/etc/init.d/ceph`` path::
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sudo /etc/init.d/ceph [options] [commands] [daemons]
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The ``ceph`` options include:
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+-----------------+----------+-------------------------------------------------+
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| Option | Shortcut | Description |
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+=================+==========+=================================================+
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| ``--verbose`` | ``-v`` | Use verbose logging. |
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+-----------------+----------+-------------------------------------------------+
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| ``--valgrind`` | ``N/A`` | (Developers only) Use `Valgrind`_ debugging. |
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+-----------------+----------+-------------------------------------------------+
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| ``--allhosts`` | ``-a`` | Execute on all hosts in ``ceph.conf.`` |
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| | | Otherwise, it only executes on ``localhost``. |
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+-----------------+----------+-------------------------------------------------+
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| ``--restart`` | ``N/A`` | Automatically restart daemon if it core dumps. |
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+-----------------+----------+-------------------------------------------------+
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| ``--norestart`` | ``N/A`` | Don't restart a daemon if it core dumps. |
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+-----------------+----------+-------------------------------------------------+
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| ``--conf`` | ``-c`` | Use an alternate configuration file. |
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+-----------------+----------+-------------------------------------------------+
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The ``ceph`` commands include:
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+------------------+------------------------------------------------------------+
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| Command | Description |
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+==================+============================================================+
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| ``start`` | Start the daemon(s). |
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+------------------+------------------------------------------------------------+
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| ``stop`` | Stop the daemon(s). |
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+------------------+------------------------------------------------------------+
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| ``forcestop`` | Force the daemon(s) to stop. Same as ``kill -9`` |
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+------------------+------------------------------------------------------------+
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| ``killall`` | Kill all daemons of a particular type. |
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+------------------+------------------------------------------------------------+
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| ``cleanlogs`` | Cleans out the log directory. |
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+------------------+------------------------------------------------------------+
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| ``cleanalllogs`` | Cleans out **everything** in the log directory. |
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+------------------+------------------------------------------------------------+
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The ``ceph`` daemons include the daemon types:
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- ``mon``
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- ``osd``
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- ``mds``
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The ``ceph`` daemons may also specify a specific instance::
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sudo /etc/init.d/ceph -a start osd.0
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Where ``osd.0`` is the first OSD in the cluster.
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.. _Valgrind: http://www.valgrind.org/
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.. toctree::
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:hidden:
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start-cluster
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Check Cluster Health <check-cluster-health>
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stop-cluster
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debug
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See `Operations`_ for more detailed information.
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.. _Operations: ../ops/index.html
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