stackhpc / a-universe-from-nothing

Kayobe configuration for the Kayobe workshop "A Universe from Nothing: Containerised OpenStack deployment using Kolla, Ansible and Kayobe"
https://docs.openstack.org/kayobe/latest/
Apache License 2.0
79 stars 26 forks source link

Use ansible_facts to reference facts #82

Closed markgoddard closed 3 years ago

markgoddard commented 3 years ago

By default, Ansible injects a variable for every fact, prefixed with ansible_. This can result in a large number of variables for each host, which at scale can incur a performance penalty. Ansible provides a configuration option [0] that can be set to False to prevent this injection of facts. In this case, facts should be referenced via ansible_facts..

This change updates all references to Ansible facts from using individual fact variables to using the items in the ansible_facts dictionary. This allows users to disable fact variable injection in their Ansible configuration, which may provide some performance improvement.

[0] https://docs.ansible.com/ansible/latest/reference_appendices/config.html#inject-facts-as-vars