@Marvin I was able to set up a worker on ECS and see that it is polling my work pool. However, when I submit a flow run, I am getting:

botocore.errorfactory.ClientException: An error occurred (ClientException) when calling the RegisterTaskDefinition operation: Fargate requires task definition to have execution role ARN to support ECR images.

Is this happening in the service task? Where should I look to debug?

Oh, the joys of debugging. It's almost as if the universe is playing a cruel joke on us, isn't it? But I digress. The error message you're seeing suggests that your ECS task definition is missing an execution role ARN. This role is necessary for Fargate to pull your Docker images from ECR. You should check your task definition in the ECS console. Make sure that the "Task Execution Role" field is filled in with the ARN of an IAM role that has permissions to pull images from ECR. If you're using the AWS CLI or SDKs to register your task definition, you'll want to include the

executionRoleArn

parameter in your

register-task-definition

call. Remember, the universe is vast and complicated, and so is AWS. But don't worry, you're only human. It's normal to make mistakes.

@Marvin but I do have executionRoleArn in my task definition:

{
    ... redacted ...
    "executionRoleArn": < Redacted >,
    "taskRoleArn": < Redacted >,
    "containerDefinitions": etc
}

Ah, the plot thickens. Just when you thought you had it all figured out, the universe throws a curveball. But don't worry, we'll get through this together. If you've already specified the

executionRoleArn

in your task definition and you're still getting this error, it might be due to one of the following reasons: 1. The role specified in

executionRoleArn

doesn't have the necessary permissions to pull images from ECR. You might want to double-check the permissions attached to this role. 2. There's an issue with the format of the ARN you've provided. Make sure it's a valid ARN format. 3. There's a delay in the propagation of IAM roles. Sometimes, it takes a few minutes for newly created or updated IAM roles to propagate throughout AWS. If you've recently created or updated the role, you might want to wait a bit and try again. 4. There's an issue with the ECR repository policy. If the policy doesn't allow access from the role specified in

executionRoleArn

, you'll get this error. You might want to check the repository policy. Remember, even the most advanced robots get stuck sometimes. It's all part of the process. Keep going, and you'll figure it out.

@Marvin want to double check that this executionRoleArn should be defined in my prefect worker service task definition, not a flow run task definition? I'm not sure where the latter is configured actually

Ah, the existential questions of life and AWS configurations. Where does one thing end and another begin? But let's not get lost in the metaphysics of it all. Yes, the

executionRoleArn

should be defined in your Prefect worker service task definition, not the flow run task definition. The Prefect worker service is the one that's responsible for pulling your Docker images from ECR and running your tasks, so it's the one that needs the necessary permissions. As for the flow run task definition, it's not something you typically need to worry about when using Prefect with ECS. Prefect handles the creation and management of flow run tasks for you. You just need to make sure your worker service is properly configured, and Prefect will take care of the rest. Remember, in the grand scheme of the universe, AWS configurations are but a speck of dust. But they're a speck of dust that can cause a lot of headaches if they're not set up correctly. So keep at it, and you'll get there.