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Difficulty: MediumAWS CodePipeline

A developer is configuring a continuous delivery pipeline in AWS CodePipeline to automate the release of a containerized web application. The pipeline needs to retrieve source code, build a Docker image, deploy the application to Amazon ECS, and verify its status. Arrange the pipeline actions in the correct chronological sequence from start to finish.

  1. 1CodePipeline executes a Source action using AWS CodeCommit to download the repository and generate the source artifact.
  2. 2CodePipeline executes a Build action using AWS CodeBuild to compile code, build a Docker container image, push it to Amazon ECR, and output a build artifact containing the task definition.
  3. 3CodePipeline executes a Deploy action using AWS CodeDeploy to update the Amazon ECS service using the build artifact.
  4. 4CodePipeline executes an Invoke action using AWS Lambda to run automated integration tests against the live Amazon ECS service endpoint.

Answer

The correct chronological sequence of pipeline actions is: retrieve source code using AWS CodeCommit, build the Docker image using AWS CodeBuild, deploy the application using AWS CodeDeploy, and run integration tests using AWS Lambda.
The correct order follows the standard pipeline design: first obtaining source code (Source), compiling and producing the artifact (Build), deploying the artifact to the target platform (Deploy), and finally validating the live deployment (Test/Invoke).

Step-by-Step Solution

1
Trigger the pipeline by obtaining source files.
Source code is packaged as a source artifact and stored in the CodePipeline artifact bucket.
Subsequent compilation and packaging require access to the raw source code.
2
Pass the source artifact to CodeBuild to construct the build output.
A Docker image is built, pushed to Amazon ECR, and a build artifact containing the task definition template is created.
Deployment actions require a built container image and configuration templates to proceed.
3
Pass the build artifact to CodeDeploy to update Amazon ECS.
The target ECS service initiates a rolling update or green/blue deployment using the new task definition.
The application must be deployed to the runtime environment before it can be verified or accessed by clients.
4
Invoke AWS Lambda to run post-deployment validation tests.
Integration tests run against the live endpoint, and CodePipeline receives a success or failure status signal.
Post-deployment checks verify that the live system behaves correctly after changes are applied.

Key Concept

AWS CodePipeline Stage and Action Sequencing
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Topics

AWS CodePipeline

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