Implementing a pub/sub architecture with AWS Copilot

Introduction

The AWS Copilot CLI is a tool that since its launch in 2020, developers have been using to build, manage, and operate Linux and Windows containers on Amazon Elastic Container Service (Amazon ECS), AWS Fargate, and AWS App Runner.

In this post, I’ll walk you through how you can use AWS Copilot CLI to easily implement a publisher service and subscriber worker services on Amazon ECS and AWS Fargate, which respectively publish and consume events in a pub/sub architecture.

To illustrate this functionality, you’ll create a publish/subscribe (pub/sub) architecture that is based on an architecture very similar to the one covered in this post, but rather than resorting to AWS Lambda functions, you’ll use Amazon ECS services running on AWS Fargate and the resources will be created and managed using the AWS Copilot CLI.

In this post, you’ll pretend you are the owner of an e-commerce platform, and each time there is an order submitted to your platform, a micro-service publishes a …