@Marvin How do I make an ECS work pool work with an EC2 capacity provider?

To make an ECS work pool work with an EC2 capacity provider, you'll need to create and configure a push work pool in Prefect Cloud that can submit flow runs for execution to AWS ECS Tasks. Here's a brief guide on how to do it: 1. In Prefect Cloud, navigate to create a push work pool by selecting AWS Elastic Container Service - Push. 2. Click the "Add +" button under AWS Credentials to create an AWS Credentials block. 3. In AWS, configure an ECS user with the

AmazonECS_FullAccess

permission and create an access key for the user. 4. Back in Prefect Cloud, name your credentials block and enter the AWS Access Key ID and AWS Secret Access Key in the relevant fields. 5. Proceed to configure your ECS task and capacity provider settings within AWS. Unfortunately, the current documentation doesn't provide a detailed step-by-step guide specifically for using ECS work pools with EC2 capacity providers. However, you should be able to set this up by applying AWS ECS and EC2 knowledge to configure tasks and capacity providers to work with Prefect workflows. If more detailed Prefect Cloud instructions are needed, it might be helpful to contact Prefect support or community for further assistance. Relevant resources: - Guide on Push Work Pools - Prefect Deploy If you encounter issues or need more specifics, it would be helpful to check the Prefect community or GitHub issues. Would you like me to search GitHub issues for more details on integrating ECS work pools with EC2 capacity providers?

Thanks @Nate, I did follow that up. I have an EC2 capacity provider set up and I configured my workpool accordingly, but I still get an error at run time :

Failed to submit flow run 'bd5c36d8-4d2b-4de8-a67a-0b06b919f0ae' to infrastructure.
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/tenacity/__init__.py", line 382, in __call__
    result = fn(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/prefect_aws/workers/ecs_worker.py", line 1557, in _create_task_run
    return ecs_client.run_task(**task_run_request)["tasks"][0]
IndexError: list index out of range

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/prefect/workers/base.py", line 896, in _submit_run_and_capture_errors
    result = await self.run(
  File "/usr/local/lib/python3.10/site-packages/prefect_aws/workers/ecs_worker.py", line 598, in run
    ) = await run_sync_in_worker_thread(
  File "/usr/local/lib/python3.10/site-packages/prefect/utilities/asyncutils.py", line 95, in run_sync_in_worker_thread
    return await anyio.to_thread.run_sync(
  File "/usr/local/lib/python3.10/site-packages/anyio/to_thread.py", line 33, in run_sync
    return await get_asynclib().run_sync_in_worker_thread(
  File "/usr/local/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 877, in run_sync_in_worker_thread
    return await future
  File "/usr/local/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 807, in run
    result = context.run(func, *args)
  File "/usr/local/lib/python3.10/site-packages/prefect_aws/workers/ecs_worker.py", line 761, in _create_task_and_wait_for_start
    self._report_task_run_creation_failure(configuration, task_run_request, exc)
  File "/usr/local/lib/python3.10/site-packages/prefect_aws/workers/ecs_worker.py", line 757, in _create_task_and_wait_for_start
    task = self._create_task_run(ecs_client, task_run_request)
  File "/usr/local/lib/python3.10/site-packages/tenacity/__init__.py", line 289, in wrapped_f
    return self(f, *args, **kw)
  File "/usr/local/lib/python3.10/site-packages/tenacity/__init__.py", line 379, in __call__
    do = self.iter(retry_state=retry_state)
  File "/usr/local/lib/python3.10/site-packages/tenacity/__init__.py", line 326, in iter
    raise retry_exc from fut.exception()
tenacity.RetryError: RetryError[]

hm at a glance almost looks like the client doesn’t know about any task definitions with that index out of range bit

I met this error with Fargate before, likely because I was asking for more vCPU that the quota of the cluster.