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============================
Add/Remove Metadata Server
============================
With ``ceph-deploy``, adding and removing metadata servers is a simple task. You
just add or remove one or more metadata servers on the command line with one
command.
.. important:: You must deploy at least one metadata server to use CephFS.
There is experimental support for running multiple metadata servers.
Do not run multiple active metadata servers in production.
See `MDS Config Reference`_ for details on configuring metadata servers.
Add a Metadata Server
=====================
Once you deploy monitors and OSDs you may deploy the metadata server(s). ::
ceph-deploy mds create {host-name}[:{daemon-name}] [{host-name}[:{daemon-name}] ...]
You may specify a daemon instance a name (optional) if you would like to run
multiple daemons on a single server.
Remove a Metadata Server
========================
Coming soon...
.. If you have a metadata server in your cluster that you'd like to remove, you may use
.. the ``destroy`` option. ::
.. ceph-deploy mds destroy {host-name}[:{daemon-name}] [{host-name}[:{daemon-name}] ...]
.. You may specify a daemon instance a name (optional) if you would like to destroy
.. a particular daemon that runs on a single server with multiple MDS daemons.
.. .. note:: Ensure that if you remove a metadata server, the remaining metadata
servers will be able to service requests from CephFS clients. If that is not
possible, consider adding a metadata server before destroying the metadata
server you would like to take offline.
.. _MDS Config Reference: ../../../cephfs/mds-config-ref
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