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doc: Added index tags.

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Signed-off-by: John Wilkins <john.wilkins@inktank.com>
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John Wilkins 2013-06-14 16:57:48 -07:00
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doc/rbd/rbd-openstack.rst
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@ -2,12 +2,14 @@
Block Devices and OpenStack
=============================
You may use Ceph block device images with OpenStack through ``libvirt``, which
.. index:: Ceph Block Device; OpenStack
You may use Ceph Block Device images with OpenStack through ``libvirt``, which
configures the QEMU interface to ``librbd``. Ceph stripes block device images as
objects across the cluster, which means that large Ceph block device images have
objects across the cluster, which means that large Ceph Block Device images have
better performance than a standalone server!
To use Ceph block devices with OpenStack, you must install QEMU, ``libvirt``,
To use Ceph Block Devices with OpenStack, you must install QEMU, ``libvirt``,
and OpenStack first. We recommend using a separate physical host for your
OpenStack installation. OpenStack recommends a minimum of 8GB of RAM and a
quad-core processor. The following diagram depicts the OpenStack/Ceph
@ -32,8 +34,8 @@ technology stack.
| OSDs | | Monitors |
+------------------------+ +------------------------+
.. important:: To use Ceph block devices with OpenStack, you must have a
running Ceph cluster.
.. important:: To use Ceph Block Devices with OpenStack, you must have
access to a running Ceph Storage Cluster.
Two parts of OpenStack integrate with Ceph's block devices:
@ -48,13 +50,15 @@ Two parts of OpenStack integrate with Ceph's block devices:
beginning with the Folsom release.
Beginning with OpenStack Folsom and Ceph 0.52, you can use OpenStack Glance to
store images in a Ceph block device, and you can use Cinder or ``nova-volume``
store images in a Ceph Block Device, and you can use Cinder or ``nova-volume``
to boot a VM using a copy-on-write clone of an image.
The instructions below detail the setup for Glance and Nova/Cinder, although
they do not have to be used together. You may store images in Ceph block devices
while running VMs using a local disk, or vice versa.
.. index:: pools; OpenStack
Create a Pool
=============