doc: Added mention of Admin Socket interface and brief description.

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

diff --git a/doc/rados/operations/monitoring.rst b/doc/rados/operations/monitoring.rst
index 68ae3b587a6915d4de06c47084fe0c293910f09a..4bce61ee69559f26c844ceded14c9add1f03c4c7 100644 (file)
--- a/doc/rados/operations/monitoring.rst
+++ b/doc/rados/operations/monitoring.rst
@@ -183,4 +183,24 @@ Placement groups map objects to OSDs. When you monitor your
 placement groups,  you will want them to be ``active`` and ``clean``. 
 For a detailed discussion, refer to `Monitoring OSDs and Placement Groups`_.
 
-.. _Monitoring OSDs and Placement Groups: ../monitoring-osd-pg
\ No newline at end of file
+.. _Monitoring OSDs and Placement Groups: ../monitoring-osd-pg
+
+
+Using the Admin Socket
+======================
+
+The Ceph admin socket allows you to query a daemon via a socket interface. 
+By default, Ceph sockets reside under ``/var/run/ceph``. To access a socket, 
+use the following command:: 
+
+       ceph --admin-daemon /var/run/ceph/{socket-name}
+
+To view the available admin socket commands, execute the following command:: 
+
+       ceph --admin-daemon /var/run/ceph/{socket-name} help
+
+The admin socket command enables you to show and set your configuration at
+runtime. See `Viewing a Configuration at Runtime`_ for details.
+
+.. _Viewing a Configuration at Runtime: ../../configuration/ceph-conf#ceph-runtime-config
+