@Marvin how do you specify an AWS region for a workpool?

Unfortunately, I could not find a straightforward example or direct reference in the Prefect documentation and GitHub issues about specifying an AWS region for a workpool. However, if you are using the ECS work pool, the region is typically configured as part of your AWS CLI or environment settings on your local machine or within your ECS Cluster setup. Further, you might want to look at this ECS guide for more details: * https://docs.prefect.io/latest/integrations/prefect-aws/ecs_guide/ Here's a general flow example that may help get you started with Prefect and AWS configurations: * https://raw.githubusercontent.com/zzstoatzz/prefect-code-examples/main/examples/tasks/submitting.py To ensure the AWS region is set correctly, ensure your AWS CLI configuration or environment variables specify the desired region. If you need more detailed help, I suggest reaching out on the Prefect Slack community or consult the Prefect discourse forums.

@Marvin, I get the error botocore.exceptions.NoRegionError: You must specify a region. for a flow run right after the Worker submits the flow run to infrastructure.

The

botocore.exceptions.NoRegionError

indicates that the AWS region is not set, which is crucial for successfully running your flow on AWS infrastructure. According to the Prefect documentation, you need to ensure that the AWS region is configured in your environment. Here are the key steps to resolve this: 1. Use the AWS Credentials block: Prefect uses the AWS

boto3

client under the hood, so you should set up your AWS credentials block properly. Link: Prefect AWS Integration

python
   from prefect_aws import AwsCredentials

   aws_creds = AwsCredentials(
       aws_access_key_id="YOUR_ACCESS_KEY",
       aws_secret_access_key="YOUR_SECRET_KEY",
       region_name="YOUR_AWS_REGION"
   )
   aws_creds.save(name="my-aws-creds")

2. Ensure AWS CLI configuration: Ensure that your AWS CLI is configured with the correct region:

bash
   aws configure

3. Environment Variables: Set environment variables for AWS configuration:

bash
   export AWS_DEFAULT_REGION="YOUR_AWS_REGION"
   export AWS_ACCESS_KEY_ID="YOUR_ACCESS_KEY"
   export AWS_SECRET_ACCESS_KEY="YOUR_SECRET_KEY"

Ensure your ECS worker inherits these environment variables. For more detailed setup instructions, refer to the ECS guide here: * https://docs.prefect.io/latest/integrations/prefect-aws/ecs_guide/ If you continue to face issues, you may want to check the Prefect Community Slack or the Prefect discourse forums for more community-driven support.