Pulling Docker images from ECR

Now that you have learned how to publish Docker images to ECR, let's focus on how Docker clients running under a variety of scenarios can pull your Docker images from ECR. Recall from the introduction to ECR at the beginning of this chapter that a variety of scenarios exist for client access to ECR, and we will now focus on these scenarios in the context of ECS container instances as your Docker clients:

• ECS container instances running in the same account as your ECR repositories
• ECS container instances running in different accounts to your ECR repositories
• AWS services that require access to your ECR repositories