@Marvin I am running a worker in an ECS container which uses the

prefecthq/prefect:2.14-python3.10

docker image. The worker is started with the command

prefect worker start --pool fargate --type ecs

. The container is exiting with the message

Unable to start worker. Please ensure you have the necessary dependencies installed to run your desired worker type.

What dependencies do I need to ensure are installed in order to run an ECS-type worker?

The documentation and discussions provided did not contain specific details on the exact dependencies needed or instructions for running an ECS-type worker for Prefect 2.x using the

prefecthq/prefect:2.14-python3.10

Docker image. However, generally for Prefect workers running on AWS ECS, it would imply that you have properly configured AWS credentials and permissions, the Prefect agent, and potentially additional dependencies if required by your flows. For more detailed assistance on setting up a Prefect ECS worker and the necessary dependencies, it would be beneficial to look at the Prefect documentation related to ECS workers, the installation and setup guide, or potentially any related GitHub issues for similar problems others may have faced. I can proceed to search for relevant GitHub issues around the error message you're encountering. Would you like me to do that?

@Marvin sure, do that.

I found two GitHub issues related to Prefect workers running on ECS, but neither directly address the specific error message you encountered with your ECS-type worker dependencies. 1. Issue #11128: This issue discusses a potential problem where a

pull_step

might install incompatible dependencies during a flow run, leading to unexpected errors. Although this does not directly relate to the startup dependencies for an ECS worker, it suggests that dependency conflicts could arise during flow execution and might provide some insight into careful dependency management in Prefect environments. 2. Issue #10302: This issue reports a crash during an ECS Task flow run. The summary indicates that a flow running every 15 minutes on ECS experienced a crash but does not provide details about startup dependencies or the "Unable to start worker" error. Unfortunately, these issues do not give us the specific information on what dependencies need to be installed to run an ECS-type worker in Prefect 2.x. Based on common practice, to run a worker in ECS using Prefect, you would need the following: - Docker installed and running (already provided by the

prefecthq/prefect:2.14-python3.10

Docker image) - AWS credentials configured (via environment variables or mounted credentials file) - Correct permissions setup for the ECS task to communicate with AWS services - If you are using Prefect Cloud, connectivity from the ECS environment to the Prefect Cloud API If the issue persists, it is recommended to further explore the Prefect documentation on ECS or to reach out to the Prefect community or support for assistance. Would you like me to provide further support or assist you with something else?

@Austen do you have prefect-aws installed? via

EXTRA_PIP_PACKAGES

or a

pip install

in a pull step? even if so, id recommend building a stable base image from

prefecthq/prefect:2.14-python3.10

that has

prefect-aws

installed and then use that as your

image

@Nate yup, the issue was due to me using the

prefecthq/prefect:2.14-python3.10

base image rather than building my own image with the

prefect-aws

package installed.

👍