Amazon ECR Public

5 minutes 5 Questions

Amazon ECR Public enables you to store, manage, and deploy public container images to share with other AWS users, or for use within your own development workflows. You can host and manage any number of public images, making it easier to share and distribute your software to users globally. Additionally, you can also discover and use public images created by others within the community, which helps to streamline the deployment process and reduce the time it takes to build and operate your applications.

Guide to Amazon ECR Public

Amazon Elastic Container Registry (ECR) Public is a fully managed container registry that makes it easy for developers to store, manage, and deploy container images publicly.
Why it's important: With Amazon ECR Public, you can share your software globally, streamline your workflow, and enhance the visibility of your public container software. It simplifies software delivery by providing a reliable and secure endpoint for software running on-premise or in a public cloud.
What it is: ECR Public enables you to store your Docker and Open Container Initiative (OCI) images, and makes them available to the public. You can share your images with others and benefit from a highly available and scalable architecture.
How it works: Users push images to Amazon ECR Public via the Docker CLI or a language-specific Docker SDK. Amazon ECR Public then stores these images in a highly available and high-performance architecture. To download or pull an image, users use the Docker CLI's pull command.
Exam Tips: When answering questions on Amazon ECR Public, keep in mind that:- Security: AWS Identity and Access Management (IAM) policies help control who can push and pull images- Integration: Amazon ECR Public integrates with AWS services like AWS CodeBuild and Amazon ECS, providing a seamless deployment experience- Scalability: Amazon ECR Public automatically scales to meet your requirements- Cost-effectiveness: With pay-per-use pricing, you only pay for the storage and data transfer that you use- Global reach: You can distribute your images publicly, to reach users around the worldRemember, understanding the core features and benefits of Amazon ECR Public, and knowing how it works can significantly help score in the exam. Practice with real-world scenarios and use cases is also very beneficial.

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Question 1

A developer wants to use Amazon ECR Public to manage their Docker container images. What is the appropriate way to push and pull container images to and from the ECR Public repository?

Push and pull images directly using the AWS Management Console Use an S3 bucket for staging and then sync to the ECR Public repository Upload the images to the ECR Public repository using the AWS SDK Use the Docker CLI with appropriate ECR Public commands

Correct Answer: Use the Docker CLI with appropriate ECR Public commands

The Docker CLI with appropriate ECR Public commands is the standard and recommended way to push and pull container images to and from Amazon ECR Public repositories. All the other options are either not recommended or not feasible for managing Docker images.

Question 2

A company has multiple development teams which use Amazon ECR Public to store and share their container images. Each team should only have access to the images that they own. How can access control be implemented to enforce this policy?

Store images on a separate AWS account for each team Configure Amazon API Gateway to enable access control Create separate IAM policies for each team and attach them to the team's IAM roles or users Enable Amazon ECR Public repository-level encryption

Correct Answer: Create separate IAM policies for each team and attach them to the team's IAM roles or users

By creating separate IAM policies associated with each team, you can enforce access only to the images owned by a particular team. Other options, such as VPC endpoints or account separation, do not directly control the access to the images within the ECR Public.

Question 3

An application deployment workload uses Amazon ECR Public to store its Docker images. The security team identifies a security vulnerability in one of the images and recommends that the image cannot be used in production. What action should be taken to prevent this image from being used in the deployment workload?

Use AWS Shield to block access to the ECR repository Change the IAM policy to deny actions for specific users Enable encryption on the ECR Public repository Delete the vulnerable image from the ECR Public repository

Correct Answer: Delete the vulnerable image from the ECR Public repository

Deleting the vulnerable image from the ECR Public repository is the most effective way to prevent it from being used in the deployment workload. Other options do not effectively prevent usage of the specific image or are not applicable for this use case.

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