openstack-ansible/doc/source/upgrade-guide/reference-scripts.rst
Alexandra Settle b6077e2ebf [DOCS] Edits to the upgrade guide
Implements: blueprint overhaul-upgrade-guide

Change-Id: Ie1343b451ed763ec74df10630ac14f811096919b
2016-12-01 11:33:13 +00:00

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=======
Scripts
=======
This section describes in detail the scripts that are used in the upgrade
process.
Within the main :file:`scripts` directory there is an :file:`upgrade-utilities`
directory, which contains additional scripts that facilitate the initial
upgrade process.
run-upgrade.sh
~~~~~~~~~~~~~~
The ``run-upgrade.sh`` script controls the overall upgrade process for
deployers who do not want to upgrade manually. It provides the following
environment variables:
* ``SCRIPTS_PATH`` - The path to the top level scripts directory
* ``MAIN_PATH`` - The ``openstack_ansible`` root directory.
* ``UPGRADE_PLAYBOOKS`` - The path to the playbooks used in upgrading
The upgrade script also bootstraps OpenStack-Ansible (using
``bootstrap-ansible.sh``) in order to provide the new role dependencies
introduced in the |previous_release_formal_name| series.
.. _migrate-os-vars:
migrate_openstack_vars.py
~~~~~~~~~~~~~~~~~~~~~~~~~
Upstream decisions influenced the change of some variable names in
|current_release_formal_name|. This script replaces any instances of these
strings in the variable override files matching the pattern
``/etc/openstack_deploy/user_*.yml``.
Variable names within comments are updated.
This script creates files in the form ``VARS_MIGRATED_<filename>`` and
places them in |upgrade_backup_dir| directory.
For example, after the script processes the
``/etc/openstack_deploy/user_variables.yml`` file, it creates the
``VARS_MIGRATED_user_variables.yml`` file in the |upgrade_backup_dir|
directory. This indicates to OpenStack-Ansible to skip this step on successive
runs. The script itself does not check for this file.
This script is called by the :ref:`config-change-playbook`.