Amazon ECS instance role
AWS Batch compute environments are populated with Amazon ECS container instances. They run the Amazon ECS container agent locally. The Amazon ECS container agent makes calls to various AWS API operations on your behalf. Therefore, container instances that run the agent require an IAM policy and role for these services to recognize that the agent belongs to you. You must create an IAM role and an instance profile for the container instances to use when they're launched. Otherwise, you can't create a compute environment and launch container instances into it. This requirement applies to container instances launched with or without the Amazon ECS optimized AMI provided by Amazon. For more information, see Amazon ECS instance role in the Amazon Elastic Container Service Developer Guide.
