def run_task(
        ecs_client,
        cluster_name,
        task_definition,
        started_by,
        container_name="app",
        command=[]):
    """
    Run a given command against a named container in a task definition
    on a particular cluster.

    Returns the response from calling run_task
    """
    return ecs_client.run_task(
        cluster=cluster_name,
        taskDefinition=task_definition,
        overrides={
            'containerOverrides': [
                {
                    'name': container_name,
                    'command': command
                },
            ]
        },
        count=1,
        startedBy=started_by,
    )