mirror of
https://github.com/ceph/ceph
synced 2025-01-07 19:51:19 +00:00
62 lines
1.2 KiB
ReStructuredText
62 lines
1.2 KiB
ReStructuredText
===========
|
|
MDS Service
|
|
===========
|
|
|
|
|
|
.. _orchestrator-cli-cephfs:
|
|
|
|
Deploy CephFS
|
|
=============
|
|
|
|
One or more MDS daemons is required to use the :term:`CephFS` file system.
|
|
These are created automatically if the newer ``ceph fs volume``
|
|
interface is used to create a new file system. For more information,
|
|
see :ref:`fs-volumes-and-subvolumes`.
|
|
|
|
For example:
|
|
|
|
.. prompt:: bash #
|
|
|
|
ceph fs volume create <fs_name> --placement="<placement spec>"
|
|
|
|
where ``fs_name`` is the name of the CephFS and ``placement`` is a
|
|
:ref:`orchestrator-cli-placement-spec`. For example, to place
|
|
MDS daemons for the new ``foo`` volume on hosts labeled with ``mds``:
|
|
|
|
.. prompt:: bash #
|
|
|
|
ceph fs volume create foo --placement="label:mds"
|
|
|
|
You can also update the placement after-the-fact via:
|
|
|
|
.. prompt:: bash #
|
|
|
|
ceph orch apply mds foo 'mds-[012]'
|
|
|
|
For manually deploying MDS daemons, use this specification:
|
|
|
|
.. code-block:: yaml
|
|
|
|
service_type: mds
|
|
service_id: fs_name
|
|
placement:
|
|
count: 3
|
|
label: mds
|
|
|
|
|
|
The specification can then be applied using:
|
|
|
|
.. prompt:: bash #
|
|
|
|
ceph orch apply -i mds.yaml
|
|
|
|
See :ref:`orchestrator-cli-stateless-services` for manually deploying
|
|
MDS daemons on the CLI.
|
|
|
|
Further Reading
|
|
===============
|
|
|
|
* :ref:`ceph-file-system`
|
|
|
|
|