kayobe/releasenotes/notes/avoid-unconditional-fact-gathering-4dfbf96e2111ad51.yaml
Mark Goddard e924c99c52 Avoid unconditional fact gathering
One way to improve the performance of Ansible is through fact caching.
Rather than gather facts in every play, we can configure Ansible to
cache them in a persistent store. An example Ansible configuration for
doing this is as follows:

[defaults]
gathering = smart
fact_caching = jsonfile
fact_caching_connection = ./facts
fact_caching_timeout = 86400

While this mostly just works, there are a few places where we
unconditionally gather facts using the setup module. This change
modifies these to only gather facts when necessary.

We no longer execute the MichaelRigart.interfaces role using become:
true, since it may gather facts and we do not want it to do so as root.
The role uses become where necessary.

Change-Id: I9984a187fc6c0496ada489bb8eef36e44d695aac
Story: 2007492
Task: 39216
2020-04-08 16:56:32 +00:00

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---
upgrade:
- |
Avoids unnecessary fact gathering using the ``setup`` module. This should
improve the performance of environments using fact caching and the Ansible
``smart`` fact gathering policy. See `story 2007492
<https://storyboard.openstack.org/#!/story/2007492>`__ for details.