mysql/client/database_init/keystone.yml

classes:
- system.mysql.client.database.keystone
parameters:
  mysql:
    client:
      enabled: true
      server:
        database:
          database:
            keystone:
              initial_data:
                engine: backupninja
                source: ${_param:backupninja_backup_host}
                host: ${linux:network:fqdn}
                database: keystone