The Deploy - upgrade control VMs pipeline job is designed to upgrade the control plane component of OpenStack. The workflow of the job includes the following stages:
| Stage | Description |
|---|---|
| Pre-upgrade | Only non destructive actions are applied during this phase. Basic API verification is performed. The job is launched on all target servers before moving to the next
stage. Online Caution Online database synchronization is required before the
upgrade to a new release. Since |
| Stop OpenStack services | Stops all OpenStack Python services on the target servers. This does not affect the data plane services such as OVS or KVM. |
| Upgrade OpenStack | Upgrades the OpenStack Python code on the target nodes sequentially. Once the stage is finalized on a specific target node, the basic API checks are performed. No workload downtime is expected. |
| Upgrade OS | Launches only if OS_UPGRADE or OS_DIST_UPGRADE is checked.
A reboot can be performed if required. When node is back online, the
basic service checks are performed. |