Amazon Elastic Container Registry (ECR)

  • A managed AWS Docker registry service.
  • Amazon ECR is a regional service.

Features

  • ECR supports Docker Registry HTTP API V2 allowing you to use Docker CLI commands or your preferred Docker tools in maintaining your existing development workflow.
  • ECR stores both the containers you create and any container software you buy through AWS Marketplace.
  • ECR stores your container images in Amazon S3.
  • ECR supports the ability to define and organize repositories in your registry using namespaces.
  • You can transfer your container images to and from Amazon ECR via HTTPS.
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Components

  • Registry
    • A registry is provided to each AWS account; you can create image repositories in your registry and store images in them.
    • The URL for your default registry is https://aws_account_id.dkr.ecr.region.amazonaws.com.
    • You must be authenticated before you can use your registry.
  • Authorization token
    • Your Docker client needs to authenticate to ECR registries as an AWS user before it can push and pull images. The AWS CLI get-login command provides you with authentication credentials to pass to Docker.
  • Repository
    • An image repository contains your Docker images.
    • ECR uses resource-based permissions to let you specify who has access to a repository and what actions they can perform on it.
    • ECR lifecycle policies enable you to specify the lifecycle management of images in a repository.
  • Repository policy
    • You can control access to your repositories and the images within them with repository policies.
  • Image
    • You can push and pull Docker images to your repositories. You can use these images locally on your development system, or you can use them in ECS task definitions.

Security

  • By default, IAM users don’t have permission to create or modify Amazon ECR resources, or perform tasks using the Amazon ECR API.
  • Use IAM policies to grant or deny permission to use ECR resources and operations.
  • ECR partially supports resource-level permissions.

Pricing

  • You pay only for the amount of data you store in your repositories and data transferred to the Internet.

Sources:
https://docs.aws.amazon.com/AmazonECR/latest/userguide/
https://aws.amazon.com/ecr/features/
https://aws.amazon.com/ecr/pricing/
https://aws.amazon.com/ecr/faqs/

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