Determining if App is Running in AWS AppRunner

This does not seem to be documented anywhere.  If you need to tell, from within your AWS AppRunner application, whether it’s running locally or in AWS you can check the environment variable AWS_EXECUTION_ENV.   The value for the environment variable will be set to AWS_ECS_FARGATE if it’s running on AppRunner.

Here’s example:

aws_environment = os.environ.get('AWS_EXECUTION_ENV', None)

if aws_environment:
    logger.info("Running on AWS: {}".format(aws_environment))
else:
    logger.info("Running locally!")