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ECR Events and Notifications

5 minutes 5 Questions

ECR Events and Notifications provide real-time updates on the operations performed in Amazon ECR. Events are generated when specific actions occur, such as image pushes or lifecycle policy executions. Users can configure Amazon Simple Notification Service (SNS) to send notifications to various recipients, informing them about the events that have occurred. This helps in proactively monitoring and managing the container image repository and identifying potential issues, ensuring the smooth operation of container-based applications.

Guide on AWS ECR Events and Notifications

ECR or Amazon Elastic Container Registry is a managed AWS Docker registry service that is highly scalable and secure. In particular, ECR Events and Notifications are important aspects of this service.

Why it is important: ECR Events and Notifications provide crucial real-time information about changes to your repositories. They can alert you to important events such as image pushes or pulls, helping you to monitor and control your AWS operations effectively.

What it is: ECR Events are AWS system events that are triggered when actions are made on your ECR repositories, such as pushing, pulling, or deleting an image. Notifications are in-turn sent to notify you regarding these actions.

How it works: ECR integrates with AWS CloudWatch Events. When an action occurs in ECR, an event is generated and sent to CloudWatch Events, which then routes that event to a target function, such as a Lambda function or an AWS Step Function. So, you can define rules to trigger actions on specified events.

Exam Tips - Answering Questions on ECR Events and Notifications:

  • Remember, ECR integrates with CloudWatch Events to provide notifications on events.
  • Understand the various system events in ECR; these include image pushes and pulls.
  • Be aware that you can define rules to trigger actions.
  • Remember, Events are represented as JSON objects and Event data can be extracted using JSONPath expressions.
  • Put an emphasis on the security and control these events and notifications provide.

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AWS Certified Solutions Architect - Amazon EC2 Container Registry Example Questions

Test your knowledge of Amazon Simple Storage Service (S3)

Question 1

A development team needs to automatically scan their images upon being pushed to an Amazon ECR repository. How can you enable this feature?

Correct Answer: Enable image scanning in the ECR repository settings

To enable image scanning in Amazon ECR, you need to modify the repository settings and enable image scanning. This will automatically trigger image scans upon being pushed to the ECR repository. The remaining options do not enable this feature; they either have no relation to image scanning or serve different purposes.

Question 2

Your team is developing an application that relies heavily on container images that are stored in Amazon ECR. The team would like to receive an Amazon SNS notification when new container images are pushed or existing images are updated. Which of the following services can help accomplish this?

Correct Answer: Amazon EventBridge

Using Amazon EventBridge, you can set up an event rule targeting Amazon SNS whenever new container images are pushed or existing images are updated in Amazon ECR. EventBridge supports a variety of AWS services and SaaS applications as event sources, making it the ideal choice for this scenario. The other options listed do not provide the same level of integration for this specific use case.

Question 3

Your team has discovered that several old and unused container images are stored on ECR. They want to set up an automatic cleanup based on a lifecycle policy. Which property should be configured to set the rule status and avoid image deletion if the rule is not finalized?

Correct Answer: ruleStatus

When defining a lifecycle policy rule, you must specify the 'ruleStatus' property to indicate whether the rule is enabled ('Enabled') or disabled ('Disabled'). This allows you to finalize the rule before it starts deleting images. The other options, 'status', 'ruleAction', 'ruleStatusActivated', 'ruleState', and 'ruleCondition', do not exist or are not applicable in this scenario.

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