openstack-ansible/doc/source/upgrade-guide/overview.rst

Overview

An OpenStack-Ansible environment can upgrade to a minor or a major version.

Note

You can only upgrade between sequential releases.

Upgrades between minor versions of OpenStack-Ansible require updating the repository clone to the latest minor release tag, and then running playbooks against the target hosts. For more information, see upgrading-to-a-minor-version.

For upgrades between major versions, the OpenStack-Ansible repository provides playbooks and scripts to upgrade an environment. The run-upgrade.sh script runs each upgrade playbook in the correct order, or playbooks can be run individually if necessary. Alternatively, a deployer can upgrade manually. A major upgrade process performs the following actions:

• Modifies files residing in the /etc/openstack_deploy directory, to reflect new configuration values.
• Places flag files that are created by the migration scripts in order to achieve idempotency. These files are placed in the directory.
• Upgrades the RabbitMQ server. See setup-infra-playbook for details.

For more information about the major upgrade process, see upgrading-by-using-a-script and upgrading-manually.