Amazon ECR

CRITICAL Domain 1: Design Secure Architectures

Amazon Elastic Container Registry (ECR) is a secure, scalable, and reliable AWS-managed service that provides a fully managed Docker container registry for storing, managing, and deploying Docker images and OCI-compatible artifacts. It supports both private and public repositories and integrates with AWS IAM for access control and other container services.

Learning Objectives

Understand the core purpose and functionality of Amazon ECR.
Identify key features such as access control, lifecycle management, and vulnerability scanning.
Recognize ECR's role in the AWS container ecosystem and its support for various image types.

Core Concepts of Amazon ECR

Amazon Elastic Container Registry (ECR) is a fundamental service for managing container images within AWS.

Amazon Elastic Container Registry (ECR) is a secure, scalable, and reliable AWS-managed service for storing and managing Docker container images.

ECR functions as a fully managed Docker container registry for storing, managing, and deploying Docker images. It also supports Open Container Initiative (OCI) images and OCI-compatible artifacts.

ECR repositories can be either private or public. It integrates with AWS Identity and Access Management (IAM) to provide resource-based permissions, allowing specified users or EC2 instances to access their container repositories and images. ECR seamlessly integrates with AWS container services like Amazon Elastic Container Service (ECS) and Amazon Elastic Kubernetes Service (EKS) for container deployment.

Users can utilize their preferred command line interface (CLI) to perform operations such as pushing, pulling, and managing Docker images, Open Container Initiative (OCI) images, and OCI-compatible artifacts within ECR.

Key Features of Amazon ECR

ECR provides several features to enhance the management, security, and lifecycle of container images.

Access Control

ECR leverages AWS Identity and Access Management (IAM) for resource-based permissions, enabling granular control over who or what (e.g., EC2 instances) can access specific container repositories and images.

Use Cases:

Controlling access to private container image repositories
Granting EC2 instances permissions to pull images

Lifecycle Rules

ECR allows users to automate the expiration and cleanup of old images within their repositories, helping to manage storage costs and maintain repository hygiene.

Use Cases:

Automated cleanup of untagged images
Implementing image retention policies

Scan on Push

ECR offers a feature to enable vulnerability scanning for images automatically as they are pushed to the registry, aiding in the early detection of security issues.

Use Cases:

Automated security checks for container images
Identifying vulnerabilities in images upon upload

Exam Focus

Use ECR to store Docker images or OCI-compatible artifacts in AWS. (source page 4)

Glossary

Amazon Elastic Container Registry (ECR): A secure, scalable, and reliable AWS-managed service for storing and managing Docker container images. It supports private and public repositories and integrates with AWS IAM for access control.

Docker images: Container images that can be stored, managed, and deployed by Amazon Elastic Container Registry (ECR).

Open Container Initiative (OCI) images: Images compliant with Open Container Initiative standards, supported for storage and management in Amazon Elastic Container Registry (ECR).

OCI-compatible artifacts: Artifacts compatible with Open Container Initiative standards that can be managed by Amazon Elastic Container Registry (ECR).

Key Takeaways

Amazon ECR is a fully managed, secure, and scalable Docker container registry that stores and manages Docker and OCI-compatible images, integrating with other AWS container services like ECS and EKS for seamless container deployment. (source page 4, 9)

Content Sources

07_AWS_Solutions_Architect_Associate_... Amazon EC2 Introduction to AWS Systems Manager f... 2026 AWS SAA Plurasight AWS Well-Architected Framework: Pilla... Extracted: 2026-01-26 13:43:04.560533 Model: gemini-2.5-flash