Upgrade OpenStack

Available since MOSK 21.5

This section provides instructions on how to upgrade the OpenStack version on a MOSK managed cluster.

Prerequisites

  1. Verify that your OpenStack cloud is running on the latest MOSK release. See Release Compatibility Matrix for the release matrix and supported upgrade paths.

  2. Just before the upgrade, back up your OpenStack databases. See Back up and restore a MariaDB Galera database for details.

  3. Verify that OpenStack is healthy and operational. All OpenStack components in the health group in the OpenStackDeploymentStatus CR should be in the Ready state. See OpenStackDeploymentStatus custom resource for details.

  4. Verify the workability of your OpenStack deployment by running Tempest against the OpenStack cluster as described in Run Tempest tests. Verification of the testing pass rate before upgrading will help you measure your cloud quality before and after upgrade.

  5. Read carefully through the Release Notes of your MOSK version payingattention to the Known issues section and the OpenStack upstream release notes for the target OpenStack version.

  6. Calculate the maintenance window using Calculate a maintenance window duration and notify users.

Perform the upgrade

To start the OpenStack upgrade, change the value of the spec:openstack_version parameter in the OpenStackDeployment object to the target OpenStack release.

Caution

It is not allowed to do skip level upgrades as well as downgrades.

When you change the value of the spec:openstack_version parameter, the OpenStack controller initializes the upgrade process.

To verify the upgrade status, use:

  • Logs from the osdpl container in the OpenStack controller pod.

  • The OpenStackDeploymentStatus object.

    When upgrade starts, the OPENSTACK VERSION field content changes to the target OpenStack version, and STATE displays APPLYING:

    kubectl -n openstack get osdplst
NAME      OPENSTACK VERSION   CONTROLLER VERSION   STATE
osh-dev   victoria            0.5.8.dev15          APPLYING

    When upgrade finishes, the STATE field should display APPLIED:

    kubectl -n openstack get osdplst
NAME      OPENSTACK VERSION   CONTROLLER VERSION   STATE
osh-dev   victoria            0.5.8.dev15          APPLIED

Verify the upgrade

  1. Verify that OpenStack is healthy and operational. All OpenStack components in the health group in the OpenStackDeploymentStatus CR should be in the Ready state. See OpenStackDeploymentStatus custom resource for details.

  2. Verify the workability of your OpenStack deployment by running Tempest against the OpenStack cluster as described in Run Tempest tests.