Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 87 insertions, 0 deletions

diff --git a/doc/rados/deployment/ceph-deploy-osd.rst b/doc/rados/deployment/ceph-deploy-osd.rst
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+=================
+ Add/Remove OSDs
+=================
+
+Adding and removing Ceph OSD Daemons to your cluster may involve a few more
+steps when compared to adding and removing other Ceph daemons. Ceph OSD Daemons
+write data to the disk and to journals. So you need to provide a disk for the
+OSD and a path to the journal partition (i.e., this is the most common
+configuration, but you may configure your system to  your own needs).
+
+In Ceph v0.60 and later releases, Ceph supports ``dm-crypt`` on disk encryption.
+You may specify the ``--dmcrypt`` argument when preparing an OSD to tell
+``ceph-deploy`` that you want to use encryption. You may also specify the
+``--dmcrypt-key-dir`` argument to specify the location of ``dm-crypt``
+encryption keys.
+
+You should test various drive configurations to gauge their throughput before
+before building out a large cluster. See `Data Storage`_ for additional details.
+
+
+List Disks
+==========
+
+To list the disks on a node, execute the following command::
+
+	ceph-deploy disk list {node-name [node-name]...}
+
+
+Zap Disks
+=========
+
+To zap a disk (delete its partition table) in preparation for use with Ceph,
+execute the following::
+
+	ceph-deploy disk zap {osd-server-name}:{disk-name}
+	ceph-deploy disk zap osdserver1:sdb
+
+.. important:: This will delete all data.
+
+
+Create OSDs
+===========
+
+Once you create a cluster, install Ceph packages, and gather keys, you
+may create the OSDs and deploy them to the OSD node(s). If you need to
+identify a disk or zap it prior to preparing it for use as an OSD,
+see `List Disks`_ and `Zap Disks`_. ::
+
+	ceph-deploy osd create --data {data-disk} {node-name}
+
+For example::
+
+	ceph-deploy osd create --data /dev/ssd osd-server1
+
+For bluestore (the default) the example assumes a disk dedicated to one Ceph
+OSD Daemon. Filestore is also supported, in which case a ``--journal`` flag in
+addition to ``--filestore`` needs to be used to define the Journal device on
+the remote host.
+
+.. note:: When running multiple Ceph OSD daemons on a single node, and
+   sharing a partioned journal with each OSD daemon, you should consider
+   the entire node the minimum failure domain for CRUSH purposes, because
+   if the SSD drive fails, all of the Ceph OSD daemons that journal to it
+   will fail too.
+
+
+List OSDs
+=========
+
+To list the OSDs deployed on a node(s), execute the following command::
+
+ ceph-deploy osd list {node-name}
+
+
+Destroy OSDs
+============
+
+.. note:: Coming soon. See `Remove OSDs`_ for manual procedures.
+
+.. To destroy an OSD, execute the following command::
+
+..	ceph-deploy osd destroy {node-name}:{path-to-disk}[:{path/to/journal}]
+
+.. Destroying an OSD will take it ``down`` and ``out`` of the cluster.
+
+.. _Data Storage: ../../../start/hardware-recommendations#data-storage
+.. _Remove OSDs: ../../operations/add-or-rm-osds#removing-osds-manual