howto/fabric.md

@@ -235,7 +235,7 @@ We use [pytest](https://www.pytest.org/) to write unit tests. To run the test su
 
 # Discussion
 
-## Overview
+## Problem overview
 
 There are multiple tasks in TPA that require manual copy-pasting of
 code from documentation to the shell or, worse, to grep backwards in
@@ -318,6 +318,17 @@ TPA. Approved in [/meeting/2020-03-09/](/meeting/2020-03-09/).
 
 We are testing Fabric.
 
+Fabric was picked mostly over Ansible because it allowed more
+flexibility in processing data from remote hosts. The YAML templating
+language of Ansible was seen as too limiting and difficult to use for
+the particular things we needed to do (such as host migration).
+
+Furthermore, we did not want to introduce another configuration
+management system. Using Ansible could have led to a parallel
+configuration management interface "creeping in" next to Puppet. The
+intention of this deployment is to have the absolute minimal amount of
+code needed to do things Puppet cannot do, not to replace it.
+
 ## Cost
 
 Time and labor.