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-=====================
- Operating a Cluster
-=====================
-
-.. index:: systemd; operating a cluster
-
-
-Running Ceph with systemd
-==========================
-
-For all distributions that support systemd (CentOS 7, Fedora, Debian
-Jessie 8 and later, SUSE), ceph daemons are now managed using native
-systemd files instead of the legacy sysvinit scripts. For example::
-
- sudo systemctl start ceph.target # start all daemons
- sudo systemctl status ceph-osd@12 # check status of osd.12
-
-To list the Ceph systemd units on a node, execute::
-
- sudo systemctl status ceph\*.service ceph\*.target
-
-Starting all Daemons
---------------------
-
-To start all daemons on a Ceph Node (irrespective of type), execute the
-following::
-
- sudo systemctl start ceph.target
-
-
-Stopping all Daemons
---------------------
-
-To stop all daemons on a Ceph Node (irrespective of type), execute the
-following::
-
- sudo systemctl stop ceph\*.service ceph\*.target
-
-
-Starting all Daemons by Type
-----------------------------
-
-To start all daemons of a particular type on a Ceph Node, execute one of the
-following::
-
- sudo systemctl start ceph-osd.target
- sudo systemctl start ceph-mon.target
- sudo systemctl start ceph-mds.target
-
-
-Stopping all Daemons by Type
-----------------------------
-
-To stop all daemons of a particular type on a Ceph Node, execute one of the
-following::
-
- sudo systemctl stop ceph-mon\*.service ceph-mon.target
- sudo systemctl stop ceph-osd\*.service ceph-osd.target
- sudo systemctl stop ceph-mds\*.service ceph-mds.target
-
-
-Starting a Daemon
------------------
-
-To start a specific daemon instance on a Ceph Node, execute one of the
-following::
-
- sudo systemctl start ceph-osd@{id}
- sudo systemctl start ceph-mon@{hostname}
- sudo systemctl start ceph-mds@{hostname}
-
-For example::
-
- sudo systemctl start ceph-osd@1
- sudo systemctl start ceph-mon@ceph-server
- sudo systemctl start ceph-mds@ceph-server
-
-
-Stopping a Daemon
------------------
-
-To stop a specific daemon instance on a Ceph Node, execute one of the
-following::
-
- sudo systemctl stop ceph-osd@{id}
- sudo systemctl stop ceph-mon@{hostname}
- sudo systemctl stop ceph-mds@{hostname}
-
-For example::
-
- sudo systemctl stop ceph-osd@1
- sudo systemctl stop ceph-mon@ceph-server
- sudo systemctl stop ceph-mds@ceph-server
-
-
-.. index:: Ceph service; Upstart; operating a cluster
-
-
-
-Running Ceph with Upstart
-=========================
-
-When deploying Ceph with ``ceph-deploy`` on Ubuntu Trusty, you may start and
-stop Ceph daemons on a :term:`Ceph Node` using the event-based `Upstart`_.
-Upstart does not require you to define daemon instances in the Ceph
-configuration file.
-
-To list the Ceph Upstart jobs and instances on a node, execute::
-
- sudo initctl list | grep ceph
-
-See `initctl`_ for additional details.
-
-
-Starting all Daemons
---------------------
-
-To start all daemons on a Ceph Node (irrespective of type), execute the
-following::
-
- sudo start ceph-all
-
-
-Stopping all Daemons
---------------------
-
-To stop all daemons on a Ceph Node (irrespective of type), execute the
-following::
-
- sudo stop ceph-all
-
-
-Starting all Daemons by Type
-----------------------------
-
-To start all daemons of a particular type on a Ceph Node, execute one of the
-following::
-
- sudo start ceph-osd-all
- sudo start ceph-mon-all
- sudo start ceph-mds-all
-
-
-Stopping all Daemons by Type
-----------------------------
-
-To stop all daemons of a particular type on a Ceph Node, execute one of the
-following::
-
- sudo stop ceph-osd-all
- sudo stop ceph-mon-all
- sudo stop ceph-mds-all
-
-
-Starting a Daemon
------------------
-
-To start a specific daemon instance on a Ceph Node, execute one of the
-following::
-
- sudo start ceph-osd id={id}
- sudo start ceph-mon id={hostname}
- sudo start ceph-mds id={hostname}
-
-For example::
-
- sudo start ceph-osd id=1
- sudo start ceph-mon id=ceph-server
- sudo start ceph-mds id=ceph-server
-
-
-Stopping a Daemon
------------------
-
-To stop a specific daemon instance on a Ceph Node, execute one of the
-following::
-
- sudo stop ceph-osd id={id}
- sudo stop ceph-mon id={hostname}
- sudo stop ceph-mds id={hostname}
-
-For example::
-
- sudo stop ceph-osd id=1
- sudo start ceph-mon id=ceph-server
- sudo start ceph-mds id=ceph-server
-
-
-.. index:: Ceph service; sysvinit; operating a cluster
-
-
-Running Ceph
-============
-
-Each time you to **start**, **restart**, and **stop** Ceph daemons (or your
-entire cluster) you must specify at least one option and one command. You may
-also specify a daemon type or a daemon instance. ::
-
- {commandline} [options] [commands] [daemons]
-
-
-The ``ceph`` options include:
-
-+-----------------+----------+-------------------------------------------------+
-| Option | Shortcut | Description |
-+=================+==========+=================================================+
-| ``--verbose`` | ``-v`` | Use verbose logging. |
-+-----------------+----------+-------------------------------------------------+
-| ``--valgrind`` | ``N/A`` | (Dev and QA only) Use `Valgrind`_ debugging. |
-+-----------------+----------+-------------------------------------------------+
-| ``--allhosts`` | ``-a`` | Execute on all nodes in ``ceph.conf.`` |
-| | | Otherwise, it only executes on ``localhost``. |
-+-----------------+----------+-------------------------------------------------+
-| ``--restart`` | ``N/A`` | Automatically restart daemon if it core dumps. |
-+-----------------+----------+-------------------------------------------------+
-| ``--norestart`` | ``N/A`` | Don't restart a daemon if it core dumps. |
-+-----------------+----------+-------------------------------------------------+
-| ``--conf`` | ``-c`` | Use an alternate configuration file. |
-+-----------------+----------+-------------------------------------------------+
-
-The ``ceph`` commands include:
-
-+------------------+------------------------------------------------------------+
-| Command | Description |
-+==================+============================================================+
-| ``start`` | Start the daemon(s). |
-+------------------+------------------------------------------------------------+
-| ``stop`` | Stop the daemon(s). |
-+------------------+------------------------------------------------------------+
-| ``forcestop`` | Force the daemon(s) to stop. Same as ``kill -9`` |
-+------------------+------------------------------------------------------------+
-| ``killall`` | Kill all daemons of a particular type. |
-+------------------+------------------------------------------------------------+
-| ``cleanlogs`` | Cleans out the log directory. |
-+------------------+------------------------------------------------------------+
-| ``cleanalllogs`` | Cleans out **everything** in the log directory. |
-+------------------+------------------------------------------------------------+
-
-For subsystem operations, the ``ceph`` service can target specific daemon types
-by adding a particular daemon type for the ``[daemons]`` option. Daemon types
-include:
-
-- ``mon``
-- ``osd``
-- ``mds``
-
-
-
-.. _Valgrind: http://www.valgrind.org/
-.. _Upstart: http://upstart.ubuntu.com/index.html
-.. _initctl: http://manpages.ubuntu.com/manpages/raring/en/man8/initctl.8.html