doc: Added index tags.

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

diff --git a/doc/rbd/rbd-snapshot.rst b/doc/rbd/rbd-snapshot.rst
index 8b36909cc3d0c9448125879942403622c04aca09..9b209777df5924ea7a8b7bf317104931e1937e3c 100644 (file)
--- a/doc/rbd/rbd-snapshot.rst
+++ b/doc/rbd/rbd-snapshot.rst
@@ -2,6 +2,8 @@
  Snapshots
 ===========
 
+.. index:: Ceph Block Device; snapshots
+
 A snapshot is a read-only copy of the state of an image at a particular point in
 time. One of the advanced features of Ceph block devices is that you can create
 snapshots of the images to retain a history of an image's state. Ceph also
@@ -137,6 +139,8 @@ For example::
        rbd snap purge rbd/foo
 
 
+.. index:: Ceph Block Device; snapshot layering
+
 Layering
 ========