README

This project is setup to be a demo application for an ECS cluster running in Fargate mode. The only thing special in this source code repo is the buildspec.yml file.

How is works

Code is committed to this repository. CodePipeline pick up the change and triggers a build using CodeBuild. CodeBuild pushes the image to ECR. An ECR cluster will automatically deploy the new image when it's pushed.

Things to note...

..when setting up CodeBuild

• Make sure you tick on Privilegedin the Environment: How to build. As the documentation says: Enable this flag if you want to build Docker images or want your builds to get elevated privileges.
• Make sure you have the IAM permissions in place to interact with ECR for the CodeBuild service role. It will need:
  • ecr:GetAuthorizationToken
  • ecr:InitiateLayerUpload
  • ecr:UploadLayerPart
  • ecr:CompleteLayerUpload
  • ecr:BatchCheckLayerAvailability
  • ecr:PutImage

..when setting up ECS

• When configuring the service, make sure you under Configure network select ENABLED under Auto-assign public IP. If you don't do this your ECS can't pull your image from ECR. Another way is to use a NAT Gateway.

Run the image locally

Build it: docker build -t spring .

Run it: docker container run --rm -p 9090:8080 spring