Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

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

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+==========================
+ Block Device Quick Start
+==========================
+
+Ensure your :term:`Ceph Storage Cluster` is in an ``active + clean`` state
+before working with the :term:`Ceph Block Device`.
+
+.. note:: The Ceph Block Device is also known as :term:`RBD` or :term:`RADOS`
+   Block Device.
+
+
+.. ditaa::
+
+           /------------------\         /----------------\
+           |    Admin Node    |         |   ceph-client  |
+           |                  +-------->+ cCCC           |
+           |    ceph-deploy   |         |      ceph      |
+           \------------------/         \----------------/
+
+
+You may use a virtual machine for your ``ceph-client`` node, but do not 
+execute the following procedures on the same physical node as your Ceph 
+Storage Cluster nodes (unless you use a VM). See `FAQ`_ for details.
+
+Create a Block Device Pool
+==========================
+
+#. On the admin node, use the ``ceph`` tool to `create a pool`_
+   (we recommend the name 'rbd').
+
+#. On the admin node, use the ``rbd`` tool to initialize the pool for use by RBD::
+
+        rbd pool init <pool-name>
+
+Configure a Block Device
+========================
+
+#. On the ``ceph-client`` node, create a block device image. :: 
+
+	rbd create foo --size 4096 --image-feature layering [-m {mon-IP}] [-k /path/to/ceph.client.admin.keyring] [-p {pool-name}]
+
+#. On the ``ceph-client`` node, map the image to a block device. :: 
+
+	sudo rbd map foo --name client.admin [-m {mon-IP}] [-k /path/to/ceph.client.admin.keyring] [-p {pool-name}]
+	
+#. Use the block device by creating a file system on the ``ceph-client`` 
+   node. :: 
+
+	sudo mkfs.ext4 -m0 /dev/rbd/{pool-name}/foo
+	
+	This may take a few moments.
+	
+#. Mount the file system on the ``ceph-client`` node. ::
+
+	sudo mkdir /mnt/ceph-block-device
+	sudo mount /dev/rbd/{pool-name}/foo /mnt/ceph-block-device
+	cd /mnt/ceph-block-device
+
+#. Optionally configure the block device to be automatically mapped and mounted
+   at boot (and unmounted/unmapped at shutdown) - see the `rbdmap manpage`_.
+
+
+See `block devices`_ for additional details.
+
+.. _create a pool: ../../rados/operations/pools/#create-a-pool
+.. _block devices: ../../rbd
+.. _FAQ: http://wiki.ceph.com/How_Can_I_Give_Ceph_a_Try
+.. _OS Recommendations: ../os-recommendations
+.. _rbdmap manpage: ../../man/8/rbdmap