This patch adds new functionality - merging base & environment specific
kolla config. This allows you to place common settings in the base
configuration and only keep environment specific settings in the
environment directories.

Change-Id: Id4588f4529a4522e68e22ce58711cb927fa68a9d
Story: 2002009
Task: 42903

The group variables originally in ansible/group_vars/ were playbook
group variables, due to being adjacent to the playbooks. Typically they
provided default values for global variables in the all group, as well
as some more specific groups. This has worked fairly well, but results
in (at least) a couple of problems.

1. The default variable precedence rules mean that these playbook group
   variables have a higher precedence than inventory group variables
   (for a given group). This can make it challenging to override
   playbook group variables in the inventory in Kayobe configuration.

2. Any playbook run by Kayobe must be in the same directory as the
   playbook group variables in order to use them. Given that they
   include variables required for connectivity such as ansible_host and
   ansible_user, this is quite critical. For Kayobe custom playbooks, we
   work around this by symlinking to the group_vars directory from the
   directory containing the custom playbook. This is not an elegant
   workaround, and has assumptions about the relative paths of the
   Kayobe configuration and virtual environment in which Kayobe is
   installed.

Story: 2010280
Task: 46233

Change-Id: Ifea5c7e73f6f410f96a7398bfd349d1f631d9fc0

Supports merging configuration for the following files:

* kolla/globals.yml
* kolla/config/bifrost/bifrost.yml
* kolla/config/bifrost/dib.yml
* kolla/config/bifrost/servers.yml
* kolla/kolla-build.conf

Configuration is merged from the following sources:

* Kayobe source code
* Base Kayobe config
* Kayobe environment

Co-Authored-By: Will Szumski <will@stackhpc.com>
Change-Id: I552bd8f7853b2032954b372bf4476676dac3e271
Story: 2002009
Task: 42974

Bashate only accepts one --ignore option, so first was ignored.

Change-Id: I2b7062c4f482faf91c0df40fb79fad75eb326d83

Adds a script for syncing feature flags from Kolla Ansible, and updates
the release docs to include this step. Also adds the inventory sync
step.

Change-Id: Id2bd48897d6b37a5006bad7f6e8597db20aa1b8b

We still see flakiness when downloading content from Ansible Galaxy,
often HTTP 520. This change increases the retries from 3 to 10, and adds
a 5 second delay between attempts.

Change-Id: I0c46e5fcc6979027dc6f1bc5cc49e923a205f654
Related: https://github.com/ansible/galaxy/issues/2429

The feature-flags.py script uses pathlib which is only supported in
Python 3. Update shebang to ensure it is run with the correct
interpreter.

Change-Id: I69ea0c90f68909399709626bddfc418e9df31acc

The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Ignore bashate failure on one-liner loops.

Add pcre devel packages to fix failing pep8 jobs.

Change-Id: I3442174b378cc6e361550fcb9b32a62f61fa7972

The flags in etc/kayobe/kolla.yml were out of sync with
ansible/roles/kolla-ansible/vars/main.yml.

This commit sorts them all alphabetically and adds a script to simplify
generating the list.

TrivialFix

Change-Id: I0e3be19eed371853d80c401d6a46770a7d6dcbc5

Previously we were seeing:

AttributeError: 'Values' object has no attribute 'env'

TrivialFix
Change-Id: I2b376303a9fef8fb3c1ada0c168bbb494216aa94

* Always use Python 3
* Drop code paths for CentOS 7
* Drop support for Yum
* Remove support for host NTP daemon, always use chrony
* Switch references from 'yum_install_epel' to 'dnf_install_epel'
* Remove overcloud host image workaround for tagged VLAN admin network
* Remove the kayobe.utils.yum_install function, which is unused

Change-Id: I368f6edafed9779658798fc342116b4c1b3ffd48
Story: 2006574
Task: 39481

Now that py2 is gone, oslotest dropped dependency on mock and will
soon affect Ussuri CI [1], let's use unittest.mock built in py3.

This also fixes py38 jobs and proactively prevents py36 and py37
failing due to [1]. This is because we never included mock in
test-requirements and instead relied on oslotest to bring it in.

[1] https://review.opendev.org/716322

Change-Id: I0c18b13c4e1fbaa9db41da4e2039ad908c28caa6

We wrap doc8 to register the directives we use in our documentation.
Previously the 'app' argument was passed as None, however sphinx has
started to use the argument.

This change uses a mock object since we don't need to use the
application object.

Change-Id: Id9e8d5f6d09f14d294cd493538780456f98c7dbe

Instead of always checking out the master branch, use the kolla-ansible
branch with which this Kayobe version is meant to be used.

Change-Id: I074d4b9d444649ecf956d3cd92748862e8c89a5c

In the 1.2.0 release the offending symlinks were removed from the role.

Also skip molecule tests from galaxy roles.

TrivialFix

Change-Id: I233e5468054e950a80355bdc2205bd6070a12297

Galaxy install often fails in CI, scuppering an otherwise good run.

Change-Id: I3d02afe33cdf32b1d285bd4bdc4a8074883113ca

Also updates the release.sh script to support tagging release candidates
and development milestones. Adds zuul configuration to trigger a
Readthedocs webhook for the release notes.

Change-Id: Ia784b34fb0b740998de72599d4921f9303e41cac

Also adds documentation on releasing to the developer guide.

Change-Id: Ic26daf362ce79fa1ea9ce217cf470d85c961affa

* Install galaxy roles before running ansible tests

* Use package module in kolla-ceph to support Debian-based systems

This is required for running tests in TravisCI.

* Fix kolla-ceph unit test

* Add more tests for kolla-ceph

Journal tests are currently failing on my laptop due to partition labels
being truncated.

* Add .gitignore for stackhpc.parted-1-1 galaxy role

* Run all test cases

Run all test cases, collecting failures, then report at the end.

Previously, the external network carried both public API traffic and
neutron external network traffic. In some cases is it useful to separate
these networks. The public network now carries the public API traffic,
leaving the external network to carry neutron external network traffic
alone. For backwards compatibility, the public network defaults to the
external network.

The CLI replaces all existing shell scripts except for
configure-kayobe.sh. Other shell scripts are now removed.