Building Resilient Cloud Microservices with .NET 9 & Azure Container Apps

Microservices architectures offer high agility and separate deployment bounds, but they also bring significant orchestration challenges. In this article, we examine how to deploy containerized .NET 9 APIs to Microsoft Azure using Terraform configurations.

First, we construct the container environments. Docker allows us to build minimal, multi-stage compilation files that bundle only the compiled DLL assemblies, minimizing file sizes and keeping security exposure to a minimum.

Next, we use Azure Container Apps (ACA) for server management. ACA is serverless, meaning instances scale down to zero when idle, saving on compute budgets, while automatically scaling up to handle thousands of concurrent queries during user traffic spikes.

Finally, database coordination is handled using Azure SQL clusters. We enable read-only replica nodes and place memory caching layers using Redis to guarantee transaction times stay sub-50ms under peak client loads.