Question

A team builds container images outside of CodePipeline using a separate Jenkins job that pushes tagged images to an Amazon ECR repository. They want a CodePipeline to automatically start whenever a new image is pushed to a specific ECR repository, then deploy the image to an ECS service. Currently the pipeline only runs when a developer manually clicks 'Release change'. Which approach will make the pipeline start automatically on new image pushes with the least custom code?

Accepted Answer

Use an Amazon ECR source action in CodePipeline, which relies on an EventBridge rule matching the ECR image push event to trigger the pipeline automatically.

Answer

Configure CodePipeline polling on the ECR repository by enabling 'PollForSourceChanges' in the source stage configuration.

Answer

Add a Lambda function subscribed to ECR that calls the DescribeImages API every 60 seconds and invokes StartPipelineExecution when a new digest appears.

Answer

Create a CodeBuild project that runs on a scheduled EventBridge rule every 5 minutes to check ECR and start the pipeline if a new tag exists.