def mp4_saved_paths():
    """ Fixture function get all the file paths where MP4 is stored

    Decorators:
        pytest.fixture

    Returns:
        list: List of file paths where mp4 camera is saved
    """
    file_paths = list()
    for agent_name in AGENT_NAMES:
        camera_pip_path = os.path.join(
            BASE_ROS_PATH, CAMERA_PIP_MP4_LOCAL_PATH_FORMAT.format(agent_name))
        camera_45degree_path = os.path.join(
            BASE_ROS_PATH,
            CAMERA_45DEGREE_LOCAL_PATH_FORMAT.format(agent_name))
        camera_topview_path = os.path.join(
            BASE_ROS_PATH, CAMERA_TOPVIEW_LOCAL_PATH_FORMAT.format(agent_name))
        file_paths.extend(
            [camera_pip_path, camera_45degree_path, camera_topview_path])
    return file_paths
Exemple #2
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def get_cameratype_params(racecar_name, agent_name):
    """ The function initializes the camera information for different camera settings
    This holds the location where the different camera mp4 are saved, also the topic
    of the camera to subscribe to get the videos.
    For the head to head racing, the top view camera is used to create graphics such
    that the bigger circles are drawn on the agent. So it can be easily identified which
    car is winning.

    Arguments:
        racecar_name (str): Name of the racecar
        agent_name (str): Agent name of the racecar
    Returns:
        (dict): camera information local path, topic, name
    """
    camera_info = dict()
    camera_pip_path = CAMERA_PIP_MP4_LOCAL_PATH_FORMAT.format(agent_name)
    camera_45degree_path = CAMERA_45DEGREE_LOCAL_PATH_FORMAT.format(agent_name)
    camera_topview_path = CAMERA_TOPVIEW_LOCAL_PATH_FORMAT.format(agent_name)
    create_folder_path(
        [camera_pip_path, camera_45degree_path, camera_topview_path])

    camera_info[CameraTypeParams.CAMERA_PIP_PARAMS] = {
        'name': CameraTypeParams.CAMERA_PIP_PARAMS.value,
        'topic_name': "/{}/deepracer/main_camera_stream".format(racecar_name),
        'local_path': camera_pip_path
    }
    camera_info[CameraTypeParams.CAMERA_45DEGREE_PARAMS] = {
        'name':
        CameraTypeParams.CAMERA_45DEGREE_PARAMS.value,
        'topic_name':
        "/{}/main_camera/zed/rgb/image_rect_color".format(racecar_name),
        'local_path':
        camera_45degree_path
    }
    camera_info[CameraTypeParams.CAMERA_TOPVIEW_PARAMS] = {
        'name': CameraTypeParams.CAMERA_TOPVIEW_PARAMS.value,
        'topic_name': "/sub_camera/zed/rgb/image_rect_color",
        'local_path': camera_topview_path
    }
    return camera_info
Exemple #3
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def main():
    """ Main function for evaluation worker """
    parser = argparse.ArgumentParser()
    parser.add_argument('-p',
                        '--preset',
                        help="(string) Name of a preset to run \
                             (class name from the 'presets' directory.)",
                        type=str,
                        required=False)
    parser.add_argument('--s3_bucket',
                        help='list(string) S3 bucket',
                        type=str,
                        nargs='+',
                        default=rospy.get_param("MODEL_S3_BUCKET",
                                                ["gsaur-test"]))
    parser.add_argument('--s3_prefix',
                        help='list(string) S3 prefix',
                        type=str,
                        nargs='+',
                        default=rospy.get_param("MODEL_S3_PREFIX",
                                                ["sagemaker"]))
    parser.add_argument('--aws_region',
                        help='(string) AWS region',
                        type=str,
                        default=rospy.get_param("AWS_REGION", "us-east-1"))
    parser.add_argument('--number_of_trials',
                        help='(integer) Number of trials',
                        type=int,
                        default=int(rospy.get_param("NUMBER_OF_TRIALS", 10)))
    parser.add_argument(
        '-c',
        '--local_model_directory',
        help='(string) Path to a folder containing a checkpoint \
                             to restore the model from.',
        type=str,
        default='./checkpoint')
    parser.add_argument('--number_of_resets',
                        help='(integer) Number of resets',
                        type=int,
                        default=int(rospy.get_param("NUMBER_OF_RESETS", 0)))
    parser.add_argument('--penalty_seconds',
                        help='(float) penalty second',
                        type=float,
                        default=float(rospy.get_param("PENALTY_SECONDS", 2.0)))
    parser.add_argument('--job_type',
                        help='(string) job type',
                        type=str,
                        default=rospy.get_param("JOB_TYPE", "EVALUATION"))
    parser.add_argument('--is_continuous',
                        help='(boolean) is continous after lap completion',
                        type=bool,
                        default=utils.str2bool(
                            rospy.get_param("IS_CONTINUOUS", False)))
    parser.add_argument('--race_type',
                        help='(string) Race type',
                        type=str,
                        default=rospy.get_param("RACE_TYPE", "TIME_TRIAL"))
    parser.add_argument('--off_track_penalty',
                        help='(float) off track penalty second',
                        type=float,
                        default=float(rospy.get_param("OFF_TRACK_PENALTY",
                                                      2.0)))
    parser.add_argument('--collision_penalty',
                        help='(float) collision penalty second',
                        type=float,
                        default=float(rospy.get_param("COLLISION_PENALTY",
                                                      5.0)))

    args = parser.parse_args()
    arg_s3_bucket = args.s3_bucket
    arg_s3_prefix = args.s3_prefix
    logger.info("S3 bucket: %s \n S3 prefix: %s", arg_s3_bucket, arg_s3_prefix)

    metrics_s3_buckets = rospy.get_param('METRICS_S3_BUCKET')
    metrics_s3_object_keys = rospy.get_param('METRICS_S3_OBJECT_KEY')

    arg_s3_bucket, arg_s3_prefix = utils.force_list(
        arg_s3_bucket), utils.force_list(arg_s3_prefix)
    metrics_s3_buckets = utils.force_list(metrics_s3_buckets)
    metrics_s3_object_keys = utils.force_list(metrics_s3_object_keys)

    validate_list = [
        arg_s3_bucket, arg_s3_prefix, metrics_s3_buckets,
        metrics_s3_object_keys
    ]

    simtrace_s3_bucket = rospy.get_param('SIMTRACE_S3_BUCKET', None)
    mp4_s3_bucket = rospy.get_param('MP4_S3_BUCKET', None)
    if simtrace_s3_bucket:
        simtrace_s3_object_prefix = rospy.get_param('SIMTRACE_S3_PREFIX')
        simtrace_s3_bucket = utils.force_list(simtrace_s3_bucket)
        simtrace_s3_object_prefix = utils.force_list(simtrace_s3_object_prefix)
        validate_list.extend([simtrace_s3_bucket, simtrace_s3_object_prefix])
    if mp4_s3_bucket:
        mp4_s3_object_prefix = rospy.get_param('MP4_S3_OBJECT_PREFIX')
        mp4_s3_bucket = utils.force_list(mp4_s3_bucket)
        mp4_s3_object_prefix = utils.force_list(mp4_s3_object_prefix)
        validate_list.extend([mp4_s3_bucket, mp4_s3_object_prefix])

    if not all([lambda x: len(x) == len(validate_list[0]), validate_list]):
        log_and_exit(
            "Eval worker error: Incorrect arguments passed: {}".format(
                validate_list), SIMAPP_SIMULATION_WORKER_EXCEPTION,
            SIMAPP_EVENT_ERROR_CODE_500)
    if args.number_of_resets != 0 and args.number_of_resets < MIN_RESET_COUNT:
        raise GenericRolloutException(
            "number of resets is less than {}".format(MIN_RESET_COUNT))

    # Instantiate Cameras
    if len(arg_s3_bucket) == 1:
        configure_camera(namespaces=['racecar'])
    else:
        configure_camera(namespaces=[
            'racecar_{}'.format(str(agent_index))
            for agent_index in range(len(arg_s3_bucket))
        ])

    agent_list = list()
    s3_bucket_dict = dict()
    s3_prefix_dict = dict()
    checkpoint_dict = dict()
    simtrace_video_s3_writers = []
    start_positions = get_start_positions(len(arg_s3_bucket))
    done_condition = utils.str_to_done_condition(
        rospy.get_param("DONE_CONDITION", any))
    park_positions = utils.pos_2d_str_to_list(
        rospy.get_param("PARK_POSITIONS", []))
    # if not pass in park positions for all done condition case, use default
    if not park_positions:
        park_positions = [DEFAULT_PARK_POSITION for _ in arg_s3_bucket]
    for agent_index, _ in enumerate(arg_s3_bucket):
        agent_name = 'agent' if len(arg_s3_bucket) == 1 else 'agent_{}'.format(
            str(agent_index))
        racecar_name = 'racecar' if len(
            arg_s3_bucket) == 1 else 'racecar_{}'.format(str(agent_index))
        s3_bucket_dict[agent_name] = arg_s3_bucket[agent_index]
        s3_prefix_dict[agent_name] = arg_s3_prefix[agent_index]

        # download model metadata
        model_metadata = ModelMetadata(
            bucket=arg_s3_bucket[agent_index],
            s3_key=get_s3_key(arg_s3_prefix[agent_index],
                              MODEL_METADATA_S3_POSTFIX),
            region_name=args.aws_region,
            local_path=MODEL_METADATA_LOCAL_PATH_FORMAT.format(agent_name))
        _, _, version = model_metadata.get_model_metadata_info()

        # checkpoint s3 instance
        checkpoint = Checkpoint(bucket=arg_s3_bucket[agent_index],
                                s3_prefix=arg_s3_prefix[agent_index],
                                region_name=args.aws_region,
                                agent_name=agent_name,
                                checkpoint_dir=args.local_model_directory)
        # make coach checkpoint compatible
        if version < SIMAPP_VERSION_2 and not checkpoint.rl_coach_checkpoint.is_compatible(
        ):
            checkpoint.rl_coach_checkpoint.make_compatible(
                checkpoint.syncfile_ready)
        # get best model checkpoint string
        model_checkpoint_name = checkpoint.deepracer_checkpoint_json.get_deepracer_best_checkpoint(
        )
        # Select the best checkpoint model by uploading rl coach .coach_checkpoint file
        checkpoint.rl_coach_checkpoint.update(
            model_checkpoint_name=model_checkpoint_name,
            s3_kms_extra_args=utils.get_s3_kms_extra_args())

        checkpoint_dict[agent_name] = checkpoint

        agent_config = {
            'model_metadata': model_metadata,
            ConfigParams.CAR_CTRL_CONFIG.value: {
                ConfigParams.LINK_NAME_LIST.value: [
                    link_name.replace('racecar', racecar_name)
                    for link_name in LINK_NAMES
                ],
                ConfigParams.VELOCITY_LIST.value: [
                    velocity_topic.replace('racecar', racecar_name)
                    for velocity_topic in VELOCITY_TOPICS
                ],
                ConfigParams.STEERING_LIST.value: [
                    steering_topic.replace('racecar', racecar_name)
                    for steering_topic in STEERING_TOPICS
                ],
                ConfigParams.CHANGE_START.value:
                utils.str2bool(rospy.get_param('CHANGE_START_POSITION',
                                               False)),
                ConfigParams.ALT_DIR.value:
                utils.str2bool(
                    rospy.get_param('ALTERNATE_DRIVING_DIRECTION', False)),
                ConfigParams.ACTION_SPACE_PATH.value:
                model_metadata.local_path,
                ConfigParams.REWARD.value:
                reward_function,
                ConfigParams.AGENT_NAME.value:
                racecar_name,
                ConfigParams.VERSION.value:
                version,
                ConfigParams.NUMBER_OF_RESETS.value:
                args.number_of_resets,
                ConfigParams.PENALTY_SECONDS.value:
                args.penalty_seconds,
                ConfigParams.NUMBER_OF_TRIALS.value:
                args.number_of_trials,
                ConfigParams.IS_CONTINUOUS.value:
                args.is_continuous,
                ConfigParams.RACE_TYPE.value:
                args.race_type,
                ConfigParams.COLLISION_PENALTY.value:
                args.collision_penalty,
                ConfigParams.OFF_TRACK_PENALTY.value:
                args.off_track_penalty,
                ConfigParams.START_POSITION.value:
                start_positions[agent_index],
                ConfigParams.DONE_CONDITION.value:
                done_condition
            }
        }

        metrics_s3_config = {
            MetricsS3Keys.METRICS_BUCKET.value:
            metrics_s3_buckets[agent_index],
            MetricsS3Keys.METRICS_KEY.value:
            metrics_s3_object_keys[agent_index],
            # Replaced rospy.get_param('AWS_REGION') to be equal to the argument being passed
            # or default argument set
            MetricsS3Keys.REGION.value:
            args.aws_region
        }
        aws_region = rospy.get_param('AWS_REGION', args.aws_region)

        if simtrace_s3_bucket:
            simtrace_video_s3_writers.append(
                SimtraceVideo(
                    upload_type=SimtraceVideoNames.SIMTRACE_EVAL.value,
                    bucket=simtrace_s3_bucket[agent_index],
                    s3_prefix=simtrace_s3_object_prefix[agent_index],
                    region_name=aws_region,
                    local_path=SIMTRACE_EVAL_LOCAL_PATH_FORMAT.format(
                        agent_name)))
        if mp4_s3_bucket:
            simtrace_video_s3_writers.extend([
                SimtraceVideo(
                    upload_type=SimtraceVideoNames.PIP.value,
                    bucket=mp4_s3_bucket[agent_index],
                    s3_prefix=mp4_s3_object_prefix[agent_index],
                    region_name=aws_region,
                    local_path=CAMERA_PIP_MP4_LOCAL_PATH_FORMAT.format(
                        agent_name)),
                SimtraceVideo(
                    upload_type=SimtraceVideoNames.DEGREE45.value,
                    bucket=mp4_s3_bucket[agent_index],
                    s3_prefix=mp4_s3_object_prefix[agent_index],
                    region_name=aws_region,
                    local_path=CAMERA_45DEGREE_LOCAL_PATH_FORMAT.format(
                        agent_name)),
                SimtraceVideo(
                    upload_type=SimtraceVideoNames.TOPVIEW.value,
                    bucket=mp4_s3_bucket[agent_index],
                    s3_prefix=mp4_s3_object_prefix[agent_index],
                    region_name=aws_region,
                    local_path=CAMERA_TOPVIEW_LOCAL_PATH_FORMAT.format(
                        agent_name))
            ])

        run_phase_subject = RunPhaseSubject()
        agent_list.append(
            create_rollout_agent(
                agent_config,
                EvalMetrics(agent_name, metrics_s3_config, args.is_continuous),
                run_phase_subject))
    agent_list.append(create_obstacles_agent())
    agent_list.append(create_bot_cars_agent())

    # ROS service to indicate all the robomaker markov packages are ready for consumption
    signal_robomaker_markov_package_ready()

    PhaseObserver('/agent/training_phase', run_phase_subject)
    enable_domain_randomization = utils.str2bool(
        rospy.get_param('ENABLE_DOMAIN_RANDOMIZATION', False))

    sm_hyperparams_dict = {}
    graph_manager, _ = get_graph_manager(
        hp_dict=sm_hyperparams_dict,
        agent_list=agent_list,
        run_phase_subject=run_phase_subject,
        enable_domain_randomization=enable_domain_randomization,
        done_condition=done_condition)

    ds_params_instance = S3BotoDataStoreParameters(
        checkpoint_dict=checkpoint_dict)

    graph_manager.data_store = S3BotoDataStore(params=ds_params_instance,
                                               graph_manager=graph_manager,
                                               ignore_lock=True)
    graph_manager.env_params.seed = 0

    task_parameters = TaskParameters()
    task_parameters.checkpoint_restore_path = args.local_model_directory

    evaluation_worker(graph_manager=graph_manager,
                      number_of_trials=args.number_of_trials,
                      task_parameters=task_parameters,
                      simtrace_video_s3_writers=simtrace_video_s3_writers,
                      is_continuous=args.is_continuous,
                      park_positions=park_positions)
def main():
    screen.set_use_colors(False)
    parser = argparse.ArgumentParser()
    parser.add_argument(
        '-c',
        '--checkpoint_dir',
        help=
        '(string) Path to a folder containing a checkpoint to restore the model from.',
        type=str,
        default='./checkpoint')
    parser.add_argument('--s3_bucket',
                        help='(string) S3 bucket',
                        type=str,
                        default=rospy.get_param("SAGEMAKER_SHARED_S3_BUCKET",
                                                "gsaur-test"))
    parser.add_argument('--s3_prefix',
                        help='(string) S3 prefix',
                        type=str,
                        default=rospy.get_param("SAGEMAKER_SHARED_S3_PREFIX",
                                                "sagemaker"))
    parser.add_argument('--s3_endpoint_url',
                        help='(string) S3 endpoint URL',
                        type=str,
                        default=rospy.get_param("S3_ENDPOINT_URL", None))
    parser.add_argument(
        '--num_workers',
        help="(int) The number of workers started in this pool",
        type=int,
        default=int(rospy.get_param("NUM_WORKERS", 1)))
    parser.add_argument('--rollout_idx',
                        help="(int) The index of current rollout worker",
                        type=int,
                        default=0)
    parser.add_argument('-r',
                        '--redis_ip',
                        help="(string) IP or host for the redis server",
                        default='localhost',
                        type=str)
    parser.add_argument('-rp',
                        '--redis_port',
                        help="(int) Port of the redis server",
                        default=6379,
                        type=int)
    parser.add_argument('--aws_region',
                        help='(string) AWS region',
                        type=str,
                        default=rospy.get_param("AWS_REGION", "us-east-1"))
    parser.add_argument('--reward_file_s3_key',
                        help='(string) Reward File S3 Key',
                        type=str,
                        default=rospy.get_param("REWARD_FILE_S3_KEY", None))
    parser.add_argument('--model_metadata_s3_key',
                        help='(string) Model Metadata File S3 Key',
                        type=str,
                        default=rospy.get_param("MODEL_METADATA_FILE_S3_KEY",
                                                None))
    # For training job, reset is not allowed. penalty_seconds, off_track_penalty, and
    # collision_penalty will all be 0 be default
    parser.add_argument('--number_of_resets',
                        help='(integer) Number of resets',
                        type=int,
                        default=int(rospy.get_param("NUMBER_OF_RESETS", 0)))
    parser.add_argument('--penalty_seconds',
                        help='(float) penalty second',
                        type=float,
                        default=float(rospy.get_param("PENALTY_SECONDS", 0.0)))
    parser.add_argument('--job_type',
                        help='(string) job type',
                        type=str,
                        default=rospy.get_param("JOB_TYPE", "TRAINING"))
    parser.add_argument('--is_continuous',
                        help='(boolean) is continous after lap completion',
                        type=bool,
                        default=utils.str2bool(
                            rospy.get_param("IS_CONTINUOUS", False)))
    parser.add_argument('--race_type',
                        help='(string) Race type',
                        type=str,
                        default=rospy.get_param("RACE_TYPE", "TIME_TRIAL"))
    parser.add_argument('--off_track_penalty',
                        help='(float) off track penalty second',
                        type=float,
                        default=float(rospy.get_param("OFF_TRACK_PENALTY",
                                                      0.0)))
    parser.add_argument('--collision_penalty',
                        help='(float) collision penalty second',
                        type=float,
                        default=float(rospy.get_param("COLLISION_PENALTY",
                                                      0.0)))
    parser.add_argument('--round_robin_advance_dist',
                        help='(float) round robin distance 0-1',
                        type=float,
                        default=float(
                            rospy.get_param("ROUND_ROBIN_ADVANCE_DIST", 0.05)))
    parser.add_argument('--start_position_offset',
                        help='(float) offset start 0-1',
                        type=float,
                        default=float(
                            rospy.get_param("START_POSITION_OFFSET", 0.0)))

    args = parser.parse_args()

    logger.info("S3 bucket: %s", args.s3_bucket)
    logger.info("S3 prefix: %s", args.s3_prefix)
    logger.info("S3 endpoint URL: %s" % args.s3_endpoint_url)

    # Download and import reward function
    # TODO: replace 'agent' with name of each agent for multi-agent training
    reward_function_file = RewardFunction(
        bucket=args.s3_bucket,
        s3_key=args.reward_file_s3_key,
        region_name=args.aws_region,
        s3_endpoint_url=args.s3_endpoint_url,
        local_path=REWARD_FUCTION_LOCAL_PATH_FORMAT.format('agent'))
    reward_function = reward_function_file.get_reward_function()

    # Instantiate Cameras
    configure_camera(namespaces=['racecar'])

    preset_file_success, _ = download_custom_files_if_present(
        s3_bucket=args.s3_bucket,
        s3_prefix=args.s3_prefix,
        aws_region=args.aws_region,
        s3_endpoint_url=args.s3_endpoint_url)

    # download model metadata
    # TODO: replace 'agent' with name of each agent
    model_metadata = ModelMetadata(
        bucket=args.s3_bucket,
        s3_key=args.model_metadata_s3_key,
        region_name=args.aws_region,
        s3_endpoint_url=args.s3_endpoint_url,
        local_path=MODEL_METADATA_LOCAL_PATH_FORMAT.format('agent'))
    _, _, version = model_metadata.get_model_metadata_info()

    agent_config = {
        'model_metadata': model_metadata,
        ConfigParams.CAR_CTRL_CONFIG.value: {
            ConfigParams.LINK_NAME_LIST.value:
            LINK_NAMES,
            ConfigParams.VELOCITY_LIST.value:
            VELOCITY_TOPICS,
            ConfigParams.STEERING_LIST.value:
            STEERING_TOPICS,
            ConfigParams.CHANGE_START.value:
            utils.str2bool(rospy.get_param('CHANGE_START_POSITION', True)),
            ConfigParams.ALT_DIR.value:
            utils.str2bool(
                rospy.get_param('ALTERNATE_DRIVING_DIRECTION', False)),
            ConfigParams.ACTION_SPACE_PATH.value:
            model_metadata.local_path,
            ConfigParams.REWARD.value:
            reward_function,
            ConfigParams.AGENT_NAME.value:
            'racecar',
            ConfigParams.VERSION.value:
            version,
            ConfigParams.NUMBER_OF_RESETS.value:
            args.number_of_resets,
            ConfigParams.PENALTY_SECONDS.value:
            args.penalty_seconds,
            ConfigParams.NUMBER_OF_TRIALS.value:
            None,
            ConfigParams.IS_CONTINUOUS.value:
            args.is_continuous,
            ConfigParams.RACE_TYPE.value:
            args.race_type,
            ConfigParams.COLLISION_PENALTY.value:
            args.collision_penalty,
            ConfigParams.OFF_TRACK_PENALTY.value:
            args.off_track_penalty,
            ConfigParams.ROUND_ROBIN_ADVANCE_DIST.value:
            args.round_robin_advance_dist,
            ConfigParams.START_POSITION_OFFSET.value:
            args.start_position_offset
        }
    }

    #! TODO each agent should have own s3 bucket
    metrics_key = rospy.get_param('METRICS_S3_OBJECT_KEY')
    if args.num_workers > 1 and args.rollout_idx > 0:
        key_tuple = os.path.splitext(metrics_key)
        metrics_key = "{}_{}{}".format(key_tuple[0], str(args.rollout_idx),
                                       key_tuple[1])
    metrics_s3_config = {
        MetricsS3Keys.METRICS_BUCKET.value:
        rospy.get_param('METRICS_S3_BUCKET'),
        MetricsS3Keys.METRICS_KEY.value: metrics_key,
        MetricsS3Keys.ENDPOINT_URL.value:
        rospy.get_param('S3_ENDPOINT_URL', None),
        MetricsS3Keys.REGION.value: rospy.get_param('AWS_REGION')
    }

    run_phase_subject = RunPhaseSubject()

    agent_list = list()

    #TODO: replace agent for multi agent training
    # checkpoint s3 instance
    # TODO replace agent with agent_0 and so on for multiagent case
    checkpoint = Checkpoint(bucket=args.s3_bucket,
                            s3_prefix=args.s3_prefix,
                            region_name=args.aws_region,
                            s3_endpoint_url=args.s3_endpoint_url,
                            agent_name='agent',
                            checkpoint_dir=args.checkpoint_dir)

    agent_list.append(
        create_rollout_agent(
            agent_config,
            TrainingMetrics(
                agent_name='agent',
                s3_dict_metrics=metrics_s3_config,
                deepracer_checkpoint_json=checkpoint.deepracer_checkpoint_json,
                ckpnt_dir=os.path.join(args.checkpoint_dir, 'agent'),
                run_phase_sink=run_phase_subject,
                use_model_picker=(args.rollout_idx == 0)), run_phase_subject))
    agent_list.append(create_obstacles_agent())
    agent_list.append(create_bot_cars_agent())
    # ROS service to indicate all the robomaker markov packages are ready for consumption
    signal_robomaker_markov_package_ready()

    PhaseObserver('/agent/training_phase', run_phase_subject)

    aws_region = rospy.get_param('AWS_REGION', args.aws_region)
    simtrace_s3_bucket = rospy.get_param('SIMTRACE_S3_BUCKET', None)
    mp4_s3_bucket = rospy.get_param('MP4_S3_BUCKET',
                                    None) if args.rollout_idx == 0 else None
    if simtrace_s3_bucket:
        simtrace_s3_object_prefix = rospy.get_param('SIMTRACE_S3_PREFIX')
        if args.num_workers > 1:
            simtrace_s3_object_prefix = os.path.join(simtrace_s3_object_prefix,
                                                     str(args.rollout_idx))
    if mp4_s3_bucket:
        mp4_s3_object_prefix = rospy.get_param('MP4_S3_OBJECT_PREFIX')

    simtrace_video_s3_writers = []
    #TODO: replace 'agent' with 'agent_0' for multi agent training and
    # mp4_s3_object_prefix, mp4_s3_bucket will be a list, so need to access with index
    if simtrace_s3_bucket:
        simtrace_video_s3_writers.append(
            SimtraceVideo(
                upload_type=SimtraceVideoNames.SIMTRACE_TRAINING.value,
                bucket=simtrace_s3_bucket,
                s3_prefix=simtrace_s3_object_prefix,
                region_name=aws_region,
                s3_endpoint_url=args.s3_endpoint_url,
                local_path=SIMTRACE_TRAINING_LOCAL_PATH_FORMAT.format(
                    'agent')))
    if mp4_s3_bucket:
        simtrace_video_s3_writers.extend([
            SimtraceVideo(
                upload_type=SimtraceVideoNames.PIP.value,
                bucket=mp4_s3_bucket,
                s3_prefix=mp4_s3_object_prefix,
                region_name=aws_region,
                s3_endpoint_url=args.s3_endpoint_url,
                local_path=CAMERA_PIP_MP4_LOCAL_PATH_FORMAT.format('agent')),
            SimtraceVideo(
                upload_type=SimtraceVideoNames.DEGREE45.value,
                bucket=mp4_s3_bucket,
                s3_prefix=mp4_s3_object_prefix,
                region_name=aws_region,
                s3_endpoint_url=args.s3_endpoint_url,
                local_path=CAMERA_45DEGREE_LOCAL_PATH_FORMAT.format('agent')),
            SimtraceVideo(
                upload_type=SimtraceVideoNames.TOPVIEW.value,
                bucket=mp4_s3_bucket,
                s3_prefix=mp4_s3_object_prefix,
                region_name=aws_region,
                s3_endpoint_url=args.s3_endpoint_url,
                local_path=CAMERA_TOPVIEW_LOCAL_PATH_FORMAT.format('agent'))
        ])

    # TODO: replace 'agent' with specific agent name for multi agent training
    ip_config = IpConfig(bucket=args.s3_bucket,
                         s3_prefix=args.s3_prefix,
                         region_name=args.aws_region,
                         s3_endpoint_url=args.s3_endpoint_url,
                         local_path=IP_ADDRESS_LOCAL_PATH.format('agent'))
    redis_ip = ip_config.get_ip_config()

    # Download hyperparameters from SageMaker shared s3 bucket
    # TODO: replace 'agent' with name of each agent
    hyperparameters = Hyperparameters(
        bucket=args.s3_bucket,
        s3_key=get_s3_key(args.s3_prefix, HYPERPARAMETER_S3_POSTFIX),
        region_name=args.aws_region,
        s3_endpoint_url=args.s3_endpoint_url,
        local_path=HYPERPARAMETER_LOCAL_PATH_FORMAT.format('agent'))
    sm_hyperparams_dict = hyperparameters.get_hyperparameters_dict()

    enable_domain_randomization = utils.str2bool(
        rospy.get_param('ENABLE_DOMAIN_RANDOMIZATION', False))
    if preset_file_success:
        preset_location = os.path.join(CUSTOM_FILES_PATH, "preset.py")
        preset_location += ":graph_manager"
        graph_manager = short_dynamic_import(preset_location,
                                             ignore_module_case=True)
        logger.info("Using custom preset file!")
    else:
        graph_manager, _ = get_graph_manager(
            hp_dict=sm_hyperparams_dict,
            agent_list=agent_list,
            run_phase_subject=run_phase_subject,
            enable_domain_randomization=enable_domain_randomization)

    # If num_episodes_between_training is smaller than num_workers then cancel worker early.
    episode_steps_per_rollout = graph_manager.agent_params.algorithm.num_consecutive_playing_steps.num_steps
    # Reduce number of workers if allocated more than num_episodes_between_training
    if args.num_workers > episode_steps_per_rollout:
        logger.info(
            "Excess worker allocated. Reducing from {} to {}...".format(
                args.num_workers, episode_steps_per_rollout))
        args.num_workers = episode_steps_per_rollout
    if args.rollout_idx >= episode_steps_per_rollout or args.rollout_idx >= args.num_workers:
        err_msg_format = "Exiting excess worker..."
        err_msg_format += "(rollout_idx[{}] >= num_workers[{}] or num_episodes_between_training[{}])"
        logger.info(
            err_msg_format.format(args.rollout_idx, args.num_workers,
                                  episode_steps_per_rollout))
        # Close the down the job
        utils.cancel_simulation_job(
            os.environ.get('AWS_ROBOMAKER_SIMULATION_JOB_ARN'),
            rospy.get_param('AWS_REGION'))

    memory_backend_params = DeepRacerRedisPubSubMemoryBackendParameters(
        redis_address=redis_ip,
        redis_port=6379,
        run_type=str(RunType.ROLLOUT_WORKER),
        channel=args.s3_prefix,
        num_workers=args.num_workers,
        rollout_idx=args.rollout_idx)

    graph_manager.memory_backend_params = memory_backend_params

    checkpoint_dict = {'agent': checkpoint}
    ds_params_instance = S3BotoDataStoreParameters(
        checkpoint_dict=checkpoint_dict)

    graph_manager.data_store = S3BotoDataStore(ds_params_instance,
                                               graph_manager)

    task_parameters = TaskParameters()
    task_parameters.checkpoint_restore_path = args.checkpoint_dir

    rollout_worker(graph_manager=graph_manager,
                   num_workers=args.num_workers,
                   rollout_idx=args.rollout_idx,
                   task_parameters=task_parameters,
                   simtrace_video_s3_writers=simtrace_video_s3_writers)