doc: Added index tags.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>

diff --git a/doc/rbd/rbd.rst b/doc/rbd/rbd.rst
index 896a7ed68ad7cb045154366e23c1b04aa76570bd..b6a108f5948f3847c8f6df77d234eecb143c3519 100644 (file)
--- a/doc/rbd/rbd.rst
+++ b/doc/rbd/rbd.rst
@@ -2,6 +2,8 @@
  Ceph Block Device
 ===================
 
+.. index:: Ceph Block Device; introduction
+
 A block is a sequence of bytes (for example, a 512-byte block of data).
 Block-based storage interfaces are the most common way to store data with
 rotating media such as hard disks, CDs, floppy disks, and even traditional
@@ -33,7 +35,8 @@ libvirt and Qemu to integrate with Ceph block devices. You can use the same clus
 to operate the `Ceph RADOS Gateway`_, the `Ceph FS filesystem`_, and Ceph block
 devices simultaneously.
 
-.. important:: To use RBD, you must have a running Ceph cluster.
+.. important:: To use Ceph Block Devices, you must have access to a running 
+   Ceph cluster.
 
 .. toctree::
        :maxdepth: 1