mirror of
https://github.com/ceph/ceph
synced 2024-12-19 18:02:46 +00:00
113 lines
4.8 KiB
ReStructuredText
113 lines
4.8 KiB
ReStructuredText
=====================
|
|
Operating a Cluster
|
|
=====================
|
|
|
|
The ``ceph`` service provides functionality to **start**, **restart**, and
|
|
**stop** your Ceph cluster. Each time you execute ``ceph`` processes, you
|
|
must specify at least one option and one command. You may also specify a daemon
|
|
type or a daemon instance. For most newer Debian/Ubuntu distributions, you may
|
|
use the following syntax::
|
|
|
|
sudo service ceph [options] [commands] [daemons]
|
|
|
|
For older distributions, you may wish to use the ``/etc/init.d/ceph`` path::
|
|
|
|
sudo /etc/init.d/ceph [options] [commands] [daemons]
|
|
|
|
The ``ceph`` service 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 hosts 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`` service 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``
|
|
|
|
The ``ceph`` service's ``[daemons]`` setting may also target a specific instance::
|
|
|
|
sudo /etc/init.d/ceph -a start osd.0
|
|
|
|
Where ``osd.0`` is the first OSD in the cluster.
|
|
|
|
|
|
Starting a Cluster
|
|
==================
|
|
|
|
To start your Ceph cluster, execute ``ceph`` with the ``start`` command.
|
|
The usage may differ based upon your Linux distribution. For example, for most
|
|
newer Debian/Ubuntu distributions, you may use the following syntax::
|
|
|
|
sudo service ceph start [options] [start|restart] [daemonType|daemonID]
|
|
|
|
For older distributions, you may wish to use the ``/etc/init.d/ceph`` path::
|
|
|
|
sudo /etc/init.d/ceph [options] [start|restart] [daemonType|daemonID]
|
|
|
|
The following examples illustrates a typical use case::
|
|
|
|
sudo service ceph -a start
|
|
sudo /etc/init.d/ceph -a start
|
|
|
|
Once you execute with ``-a``, Ceph should begin operating. You may also specify
|
|
a particular daemon instance to constrain the command to a single instance. For
|
|
example::
|
|
|
|
sudo /etc/init.d/ceph start osd.0
|
|
|
|
|
|
Stopping a Cluster
|
|
==================
|
|
|
|
To stop your Ceph cluster, execute ``ceph`` with the ``stop`` command.
|
|
The usage may differ based upon your Linux distribution. For example, for most
|
|
newer Debian/Ubuntu distributions, you may use the following syntax::
|
|
|
|
sudo service ceph [options] stop [daemonType|daemonID]
|
|
|
|
For example::
|
|
|
|
sudo service ceph -a stop
|
|
|
|
For older distributions, you may wish to use the ``/etc/init.d/ceph`` path::
|
|
|
|
sudo /etc/init.d/ceph -a stop
|
|
|
|
Ceph should shut down the operating processes.
|
|
|
|
|
|
.. _Valgrind: http://www.valgrind.org/ |