2019-02-21: CP; update README

README.md

-Automatic Update Glance Images
-==============================
+Automatic Update of Glance Images
+=================================
 
 This script automates the process of updating images of operating systems in OpenStack.
 
@@ -50,6 +50,18 @@ Execute the script
 Images are now present in OpenStack Glance.
 This script uploads all the images as 'Public', accessible by all users.
 
+### Update simplestreams
+After updating the images, update the simplestreams catalog:
+
+    $ openstack object list simplestreams
+    $ openstack object save simplestreams images/streams/v1/com.ubuntu.cloud-released-imagemetadata.json --file com.ubuntu.cloud-released-imagemetadata_backup.json
+    $ openstack object save simplestreams images/streams/v1/index.json --file index_backup.json
+
+	$ python3 generate-files-for-simplestream.py
+    $ cd output/simplestreams
+    $ ls -lh images/streams/v1/
+    $ openstack object create simplestreams images/streams/v1/com.ubuntu.cloud-released-imagemetadata.json images/streams/v1/index.json
+
 
 Pipeline
 --------
@@ -61,4 +73,4 @@ Pipeline
 Notes
 -----
 
-This script is tested on Ubuntu 16.04 x64
\ No newline at end of file
+This script is tested on Ubuntu 16.04 x64