@Marvin how do I override the default ECS ephemeral storage when running a prefect flow on AWS ECS?

To override the default ECS ephemeral storage when running a Prefect flow, you would typically configure the

ECSTask

infrastructure block with the desired settings for ephemeral storage. However, based on the information provided by the Prefect documentation, there's no direct mention of setting ephemeral storage for an ECS Task within the context of Prefect deployments. Since ephemeral storage configuration is an AWS-specific setting, you might need to set it directly through the AWS ECS Task Definition. Prefect deployments allow for

infra_overrides

where you can override various settings for the ECS Task Definition, including storage. The documentation does not provide a direct example on how to set the ephemeral storage for an ECS task using Prefect, but here's a general example of how you might approach it:

python
from prefect.infrastructure import ECSTask

# Define your ECS infrastructure with the desired overrides
ecs_task = ECSTask(
    # ... other configuration options ...
    infra_overrides={
        "containerDefinitions": [
            {
                # ... other container settings ...
                "linuxParameters": {
                    "maxSwap": 0,  # This disables swap
                    "sharedMemorySize": 512,
                }
            }
        ],
        "ephemeralStorage": {
            "sizeInGiB": <desired_size>  # Set your desired ephemeral storage size here
        },
        # ... additional override options ...
    }
)

# Apply the infrastructure settings to your deployment
deployment = Deployment.build_from_flow(
    flow=my_flow,
    name="my-deployment",
    version=1,
    work_queue_name="my-work-queue",
    infrastructure=ecs_task
)
deployment.apply()

Please replace

<desired_size>

with your intended ephemeral storage size. Keep in mind that this code snippet is a general example and you may need to tailor it to your specific use case and Prefect Deployment. Since the exact details on overriding settings can vary, I suggest consulting the AWS ECS documentation for the correct structure of the task definition, especially regarding storage settings. If there is a specific syntax or method to do this within Prefect that is not covered in the above approach, I would recommend reaching out to the Prefect community or support for more detailed guidance.