In this post, we will introduce the Publisher-Subscriber (Pub/Sub) pattern to decouple the communication between services in Azure Container Apps, using Dapr Pub/Sub API. We will create a new background service named ACA-Processer Backend responsible for sending notification emails to task owners, demonstrating the loose coupling and flexibility of the Pub/Sub pattern. The tutorial covers topics including deploying backend API Microservices to Azure Container Apps, Dapr Integration, State Management, Monitoring and Observability, Continuous Deployment using GitHub Actions, Volume Mounts using Azure Files, and Health Probes. The source code and demo application are available on GitHub. Learn how to implement the Pub/Sub pattern in a simple, abstracted way without worrying about the implementation details of different message brokers SDKs and management.
