compute_driver: {get_param: NovaComputeDriver}
compute_manager: {get_param: NovaComputeManager}
scheduler_host_manager: {get_param: NovaSchedulerHostManager}
compute_driver: {get_param: NovaComputeDriver}
compute_manager: {get_param: NovaComputeManager}
scheduler_host_manager: {get_param: NovaSchedulerHostManager}