openstack-ansible/doc/source/admin/upgrades/major-upgrades.rst

Major upgrades

This guide provides information about the upgrade process from to for OpenStack-Ansible.

Note

You can upgrade between sequential releases or between releases marked as SLURP.

Introduction

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.

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

Warning

Test this on a development environment first.

Upgrading by using a script

The release series of OpenStack-Ansible contains the code for migrating from to .

Running the upgrade script

To upgrade from to by using the upgrade script, perform the following steps in the openstack-ansible directory:

1. Change directory to the repository clone root directory:

   # cd /opt/openstack-ansible

2. Run the following commands:

   # git checkout # ./scripts/run-upgrade.sh

For more information about the steps performed by the script, see upgrading-manually.

Upgrading manually

Manual upgrades are useful for scoping the changes in the upgrade process (for example, in very large deployments with strict SLA requirements), or performing other upgrade automation beyond that provided by OpenStack-Ansible.

The steps detailed here match those performed by the run-upgrade.sh script. You can safely run these steps multiple times.

Preflight checks

Before starting with the upgrade, perform preflight health checks to ensure your environment is stable. If any of those checks fail, ensure that the issue is resolved before continuing.

Check out the release

Ensure that your OpenStack-Ansible code is on the latest tagged release.

# git checkout

Prepare the shell variables

Define these variables to reduce typing when running the remaining upgrade tasks. Because these environments variables are shortcuts, this step is optional. If you prefer, you can reference the files directly during the upgrade.

# cd /opt/openstack-ansible
# export MAIN_PATH="$(pwd)"
# export SCRIPTS_PATH="${MAIN_PATH}/scripts"

Backup the existing OpenStack-Ansible configuration

Make a backup of the configuration of the environment:

# source_series_backup_file="/openstack/backup-openstack-ansible-.tar.gz" # tar zcf ${source_series_backup_file} /etc/openstack_deploy /etc/ansible/ /usr/local/bin/openstack-ansible.rc

Bootstrap the new Ansible and OSA roles

To ensure that there is no currently set ANSIBLE_INVENTORY to override the default inventory location, we unset the environment variable.

# unset ANSIBLE_INVENTORY

Bootstrap Ansible again to ensure that all OpenStack-Ansible role dependencies are in place before you run playbooks from the release.

# ${SCRIPTS_PATH}/bootstrap-ansible.sh

Change to the playbooks directory

Change to the playbooks directory to simplify the CLI commands from here on in the procedure, given that most playbooks executed are in this directory.

# cd playbooks

Implement changes to OSA configuration

If there have been any OSA variable name changes or environment/inventory changes, there is a playbook to handle those changes to ensure service continuity in the environment when the new playbooks run. The playbook is tagged to ensure that any part of it can be executed on its own or skipped. Please review the contents of the playbook for more information.

# openstack-ansible "${SCRIPTS_PATH}/upgrade-utilities/deploy-config-changes.yml"

Note

With upgrade to 2024.1 (Caracal) release usage of RabbitMQ Quorum Queues is enabled by default. Migration to usage of Quorum Queues results in prolonged downtime for services during upgrade.

To reduce downtime you might want to set oslomsg_rabbit_quorum_queues: false at this point and migrate to Quorum Queues usage after OpenStack upgrade is done.

Please, check RabbitMQ maintenance for more information about switching between Quourum and HA Queues.

Upgrade hosts

Before installing the infrastructure and OpenStack, update the host machines.

Warning

Usage of non-trusted certificates for RabbitMQ is not possible due to requirements of newer amqp versions.

After that you can proceed with standard OpenStack upgrade steps:

# openstack-ansible setup-hosts.yml --limit '!galera_all:!rabbitmq_all' -e package_state=latest

This command is the same setting up hosts on a new installation. The galera_all and rabbitmq_all host groups are excluded to prevent reconfiguration and restarting of any of those containers as they need to be updated, but not restarted.

Once that is complete, upgrade the final host groups with the flag to prevent container restarts.

# openstack-ansible setup-hosts.yml -e 'lxc_container_allow_restarts=false' --limit 'galera_all:rabbitmq_all'

Upgrade infrastructure

We can now go ahead with the upgrade of all the infrastructure components. To ensure that rabbitmq and mariadb are upgraded, we pass the appropriate flags.

# openstack-ansible setup-infrastructure.yml -e 'galera_upgrade=true' -e 'rabbitmq_upgrade=true' -e package_state=latest

With this complete, we can now restart the mariadb containers one at a time, ensuring that each is started, responding, and synchronized with the other nodes in the cluster before moving on to the next steps. This step allows the LXC container configuration that you applied earlier to take effect, ensuring that the containers are restarted in a controlled fashion.

# openstack-ansible "${SCRIPTS_PATH}/upgrade-utilities/galera-cluster-rolling-restart.yml"

Upgrade OpenStack

We can now go ahead with the upgrade of all the OpenStack components.

# openstack-ansible setup-openstack.yml -e package_state=latest

Upgrade Ceph

With each OpenStack-Ansible version we define default Ceph client version that will be installed on Glance/Cinder/Nova hosts and used by these services. If you want to preserve the previous version of the ceph client during an OpenStack-Ansible upgrade, you will need to override a variable ceph_stable_release in your user_variables.yml

If Ceph has been deployed as part of an OpenStack-Ansible deployment using the roles maintained by the Ceph-Ansible project you will also need to upgrade the Ceph version. Each OpenStack-Ansible release is tested only with specific Ceph-Ansible release and Ceph upgrades are not checked in any Openstack-Ansible integration tests. So we do not test or guarantee an upgrade path for such deployments. In this case tests should be done in a lab environment before upgrading.

Warning

Ceph related playbooks are included as part of setup-infrastructure.yml and setup-openstack.yml playbooks, so you should be cautious when running them during OpenStack upgrades. If you have upgrade_ceph_packages: true in your user variables or provided -e upgrade_ceph_packages=true as argument and run setup-infrastructure.yml this will result in Ceph package being upgraded as well.

In order to upgrade Ceph in the deployment you will need to run:

# openstack-ansible /etc/ansible/roles/ceph-ansible/infrastructure-playbooks/rolling_update.yml