--- /dev/null
+=====================
+ 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
Code Review / stor4nfv.git / blobdiff