+Building Kolla Images
+---------------------
+
+TripleO currently relies on Kolla docker containers. Kolla supports container
+customization and we are making use of this feature within TripleO to inject
+puppet (our configuration tool of choice) into the Kolla base images. To
+build Kolla images for TripleO adjust your kolla config to build your
+centos base image with puppet using the example below:
+
+.. code-block::
+
+$ cat template-overrides.j2
+{% extends parent_template %}
+{% set base_centos_binary_packages_append = ['puppet'] %}