Before we get started creating and configuring ECR repositories, it is important to provide a brief introduction to the core concepts of ECR.
ECR is a fully-managed private Docker registry provided by AWS and offers tight integration with ECS and other AWS services. ECR consists of a number of components, as shown in the following diagram:
ECR architecture
The core components of ECR include:
- Repositories: A repository stores all versions of images for a given Docker image. Each repository is configured with a name and URI, which is unique to your AWS account and region.
- Permissions: Each repository includes permissions that allow you to grant access for various ECR operations, such as pushing or pulling Docker images.
- Lifecycle policy: Each repository can be configured with an optional lifecycle policy, which can be used to clean up orphaned Docker images...
