ansible 2.12 breaks undercloud install

[David Vallee Delisle]

Since today, centos9 ships with ansible2.12 and the default ansible.cfg is empty [1].

This apparently breaks undercloud install [2]

Today:
ansible-core-2.12.0-1.el9.x86_64

Last week:
ansible-core-2.11.6-1.el9.x86_64

[1]
~~~
[stack@undercloud-0 ~]$ cat ./undercloud-ansible-dwewukwo/ansible.cfg
# Since Ansible 2.12 (core):
# To generate an example config file (a "disabled" one with all default settings, commented out):
# $ ansible-config init --disabled > ansible.cfg
#
# Also you can now have a more complete file by including existing plugins:
# ansible-config init --disabled -t all > ansible.cfg

# For previous versions of Ansible you can check for examples in the 'stable' branches of each version
# Note that this file was always incomplete and lagging changes to configuration settings

# for example, for 2.9: https://github.com/ansible/ansible/blob/stable-2.9/examples/ansible.cfg
~~~

[2]
~~~
Deployment Failed!

ERROR: Heat log files: /home/stack/tripleo-deploy/undercloud/heat_launcher/tripleo_deploy-vfkla4sv

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Exception: No section: 'defaults'
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/tripleoclient/v1/tripleo_deploy.py", line 1436, in take_action
    self._standalone_deploy(parsed_args)
  File "/usr/lib/python3.9/site-packages/tripleoclient/v1/tripleo_deploy.py", line 1299, in _standalone_deploy
    ansible.write_default_ansible_cfg(
  File "/usr/lib/python3.9/site-packages/tripleo_common/utils/ansible.py", line 89, in write_default_ansible_cfg
    config.set('defaults', 'retry_files_enabled', 'False')
  File "/usr/lib64/python3.9/configparser.py", line 1204, in set
    super().set(section, option, value)
  File "/usr/lib64/python3.9/configparser.py", line 902, in set
    raise NoSectionError(section) from None
configparser.NoSectionError: No section: 'defaults'
None
No section: 'defaults'
~~~

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/tripleo-common/+/818029

[David Vallee Delisle (valleedelisle)]

opened downstream bug: https://bugzilla.redhat.com/show_bug.cgi?id=2023903

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/tripleo-common/+/818029
Committed: https://opendev.org/openstack/tripleo-common/commit/02c44076e6722d8b96fbf6d30da9abb8dcbe539a
Submitter: "Zuul (22348)"
Branch: master

commit 02c44076e6722d8b96fbf6d30da9abb8dcbe539a
Author: David Vallee Delisle <email address hidden>
Date: Mon Nov 15 18:20:50 2021 -0500

    Running ansible-config before writing default config

    Since ansible 2.12, the default config is completely empty and this
    breaks the undercloud install process.

    We need to run ansible-config beforehand to generate a boilerplace
    config.

    Closes-bug: #1951020
    Change-Id: I544d117e03037c8a4744139c36bc63b978c489dd

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/wallaby
Review: https://review.opendev.org/c/openstack/tripleo-common/+/818475

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/tripleo-common/+/818475
Committed: https://opendev.org/openstack/tripleo-common/commit/93269dccb0d416e8c4e999a799c66f62089e606f
Submitter: "Zuul (22348)"
Branch: stable/wallaby

commit 93269dccb0d416e8c4e999a799c66f62089e606f
Author: David Vallee Delisle <email address hidden>
Date: Mon Nov 15 18:20:50 2021 -0500

    Running ansible-config before writing default config

    Since ansible 2.12, the default config is completely empty and this
    breaks the undercloud install process.

    We need to run ansible-config beforehand to generate a boilerplace
    config.

    Closes-bug: #1951020
    Change-Id: I544d117e03037c8a4744139c36bc63b978c489dd
    (cherry picked from commit 02c44076e6722d8b96fbf6d30da9abb8dcbe539a)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/tripleo-common 16.3.0 release.