A known issue causes the migration of Ceph OSDs from FileStore to BlueStore to fail. In use cases where the `osd_objectstore` parameter was not set explicitly when you deployed Red Hat OpenStack Platform 13 with Red Hat Ceph Storage 3, the migration exits without converting any OSDs and falsely reports that the OSDs are already using BlueStore. For more information about the known issue, see https://bugzilla.redhat.com/show_bug.cgi?id=1875777 + As a workaround, perform the following steps: + . Include the following content in an environment file: + ``` parameter_defaults: CephAnsibleExtraConfig: osd_objectstore: filestore ``` . Perform a stack update with the `overcloud deploy --stack-only` command, and include the new or existing environment file that contains the `osd_objectstore` parameter. In the following example, this environment file is `<osd_objectstore_environment_file>`. Also include any other environment files that you included during the converge step of the upgrade: + ``` $ openstack overcloud deploy --stack-only \ -e <osd_objectstore_environment_file> \ -e <converge_step_environment_files> ``` . Proceed with the FileStore to BlueStore migration by using the existing documentation. See https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.1/html/framework_for_upgrades_13_to_16.1/OSD-migration-from-filestore-to-bluestore + *Result:* The FileStore to BlueStore playbook triggers the conversion process, and removes and re-creates the OSDs successfully.