How can a solutions architect ensure that the application has permission to access Amazon S3?
Update the S3 role in AWS IAM to allow read/write access from Amazon ECS, and then relaunch the container.
Create an IAM role with S3 permissions, and then specify that role as the taskRoleArn in the task definition.
Create a security group that allows access from Amazon ECS to Amazon S3, and update the launch configuration used by the ECS cluster.
Create an IAM user with S3 permissions, and then relaunch the Amazon EC2 instances for the ECS cluster while logged in as this account.
Explanations:
Updating the S3 role does not directly provide the necessary permissions to the ECS tasks. IAM roles need to be assigned to the task definitions for proper access control.
Creating an IAM role with S3 permissions and specifying it as the taskRoleArn in the ECS task definition allows the application running in the container to access S3 with the necessary permissions.
Security groups control network access and do not manage IAM permissions. ECS needs IAM roles to interact with S3, not just a security group.
Creating an IAM user and relaunching EC2 instances is not appropriate for granting access to ECS tasks. IAM roles are the recommended method for managing permissions for services like ECS.
From my perspective, the answer is:
Create an IAM role with S3 permissions, and then specify that role as the taskRoleArn in the task definition.