Adding upstream version 14.2.21.upstream/14.2.21upstream

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

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+==========================
+ Block Device Quick Start
+==========================
+
+To use this guide, you must have executed the procedures in the `Storage
+Cluster Quick Start`_ guide first. 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.
+
+
+Install Ceph
+============
+
+#. Verify that you have an appropriate version of the Linux kernel. 
+   See `OS Recommendations`_ for details. ::
+   
+	lsb_release -a
+	uname -r
+
+#. On the admin node, use ``ceph-deploy`` to install Ceph on your 
+   ``ceph-client`` node. ::
+
+	ceph-deploy install ceph-client
+	
+#. On the admin node, use ``ceph-deploy`` to copy the Ceph configuration file
+   and the ``ceph.client.admin.keyring`` to the ``ceph-client``. :: 
+
+	ceph-deploy admin ceph-client
+
+   The ``ceph-deploy`` utility copies the keyring to the ``/etc/ceph`` 
+   directory. Ensure that the keyring file has appropriate read permissions 
+   (e.g., ``sudo chmod +r /etc/ceph/ceph.client.admin.keyring``).
+
+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.
+
+.. _Storage Cluster Quick Start: ../quick-ceph-deploy
+.. _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