[Murano Docs] Install murano-agent by cloud-init

Change-Id: Id62bdf151fab49e48c4962ccd01d56d55d279ae4

doc/source/draft/admin-guide/murano_agent.rst

@@ -24,13 +24,15 @@ minimum units of the installation workflow.
 Murano-agent on a new VM
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
-Currently, most of the application deployments are possible only on images with
+Earlier most of the application deployments were possible only on images with
 pre-installed murano agent. You can refer to
-`corresponding documentation <http://murano.readthedocs.org/en/latest/image_builders/index.html#building-murano-image>`_
+:ref:`corresponding documentation <building_images>`
 on building an image with murano-agent.
 
-To make deployment with murano easier, the murano team is working on the
-murano-agent automatic installation with cloud-init.
+Currently murano-agent can be automatically installed by cloud-init. To deploy
+an application on an image with pre-installed cloud-init you should mark the
+image with Murano specific metadata. More information about preparing images
+can be found :ref:`here <upload_images>`.
 
 Interaction with murano-engine
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

doc/source/image_builders/index.rst

@@ -12,6 +12,9 @@
       WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
       License for the specific language governing permissions and limitations
       under the License.
+..
+
+.. _building_images:
 
 =====================
 Building Murano Image

doc/source/image_builders/upload.rst

@@ -12,8 +12,9 @@
   WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   License for the specific language governing permissions and limitations
   under the License.
+..
 
-
+.. _upload_images:
 
 ========================
 Upload image into glance