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Difficulty: MediumAWS CodePipeline

A developer is configuring an automated build pipeline using AWS CodePipeline. The pipeline is configured to trigger automatically when a ZIP file containing the application source code is uploaded to a specific Amazon S3 bucket, build the application using AWS CodeBuild, and store the output in another bucket. Order the sequence of events that occurs from the developer uploading the ZIP file to the start of the AWS CodeBuild execution.

  1. 1The developer uploads the new application ZIP file to the source Amazon S3 bucket.
  2. 2Amazon EventBridge detects the S3 object creation event via Amazon CloudTrail or S3 Event Notifications.
  3. 3An EventBridge rule matches the event pattern and triggers the AWS CodePipeline execution.
  4. 4AWS CodePipeline executes the Source stage, retrieves the ZIP file, and writes it to the pipeline's S3 artifact store.
  5. 5AWS CodePipeline starts the Build stage, passing the source bundle to AWS CodeBuild as an input artifact.

Answer

The correct sequence of events starts with the developer uploading the ZIP file to S3, followed by EventBridge detecting the event and triggering CodePipeline, which then downloads the file to the S3 artifact store and subsequently passes it to AWS CodeBuild to start the build.
The correct order follows the event-driven trigger flow: uploading to S3, detection of the S3 event by EventBridge, matching the target rule to trigger CodePipeline, fetching and saving the source code into the pipeline S3 artifact store, and finally starting CodeBuild with the artifact.

Step-by-Step Solution

1
Upload the source code archive to S3.
The S3 object creation event is emitted.
This is the initial action that starts the event-driven workflow.
2
EventBridge detects the S3 object creation event.
The event is captured and evaluated by EventBridge rules.
EventBridge acts as the serverless event router between Amazon S3 and CodePipeline.
3
The matched EventBridge rule triggers CodePipeline.
CodePipeline receives the trigger and starts a new pipeline execution.
The rule target is configured to initiate the execution of the pipeline.
4
CodePipeline runs the Source stage and writes the ZIP file to the artifact store S3 bucket.
The ZIP file is saved as an input artifact.
CodePipeline must store the retrieved source code in its internal artifact store so that downstream actions like CodeBuild can access it.
5
CodePipeline triggers CodeBuild with the input artifact.
CodeBuild receives the source bundle from the artifact store and begins the build.
The Build stage action is executed with the input artifact specified in the pipeline configuration.

Key Concept

AWS CodePipeline S3 and EventBridge Event Integration and Artifact Flow
Estimated Time:1m 30s
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Topics

AWS CodePipeline

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