Best practices for scalable microservices development with .NET

In today's digital world, the demand for flexible and agile systems is higher than ever. Customers expect fast and reliable services, which is prompting companies to rely on microservices to develop scalable and robust applications.

According to Statista, 85% of large organizations were already using microservices in their business operations in 2021. But as with any technology, the question arises: Which programming language is the best choice? Can you build a microservices architecture with .NET? Fortunately, the answer is yes. .NET is an extremely versatile and stable language that is ideally suited for building microservices. However, regardless of how good a language is, best practices must be followed to unlock its full potential.

What are microservices?

Unlike monolithic architectures, where the entire application is one large block, microservices architectures break applications down into small, independent services. Each service has a specific task or business logic, which means there are no conflicts between different microservices. A major advantage of microservices is their isolation from one another. They use an API gateway for communication.

Why are microservices with .NET a good choice?
  • Cross-platform compatibility:

    .NET offers cross-platform capabilities through frameworks like .NET Core and Xamarin. This means your microservices can run on various operating systems such as Windows, Linux, and macOS, giving you flexibility and reducing infrastructure limitations.

  • containerization:

    Containers, in conjunction with platforms like Kubernetes, provide the necessary flexibility for application deployment. They also help save resources through efficient utilization.

  • Cloud compatibility:

    .NET is cloud-compatible and supports cloud scalability. Therefore, all microservices developed with .NET are compatible with cloud environments. Azure and AWS are the best cloud platforms to pair with .NET.

Best practices for microservices development with .NET

1. Choose the right microservices pattern

Microservice patterns can be divided into different categories:

  • Decomposition pattern: Breaks down applications into subdomains based on business requirements.
  • Integration patterns: Solves orchestration problems and ingress requirements across the entire system.
  • Database patternsManages data from various software components and facilitates communication between multiple databases.
  • Observability patternsHelps to discover unknown problems between different service interactions in order to create a secure application.

Each pattern has its application, so it should be carefully selected according to business requirements.

2. Apply the Single Responsibility Principle

Just as in programming, where a class executes only one function, microservices should be designed for a specific task. For example, a microservice for an e-commerce store could include components such as an inventory service, an order service, a payment service, and so on. The inventory service should focus solely on managing the e-commerce store's inventory.

3. Ensure good API design and backward compatibility

Microservices rely on API gateways for communication. Therefore, it's crucial to design your APIs carefully. One of the most common methods for designing a scalable API is to use RESTful APIs, which have the advantage of not requiring any special frameworks or SDKs.

Backward compatibility means that every API should be built in such a way that no existing service is broken. One way to achieve this is by using API versioning. .NET supports Web API versioning, which allows the implementation of multiple versions of the same API.

4. Database Management

You might think that the code architecture is behind scalability problems, but often it's the databases. Each microservice has its own database, which makes it difficult to keep the data consistent. In such cases, you should use Entity Framework Core to manage data across your microservices.

5. Continuously monitor services

Monitoring microservices and continuously checking their functionality is good practice. .NET offers built-in middleware called Health Checks for this purpose, which reports on the health of your application.

6. Use containers

Containers are like boxes that hold specific code. The main purpose of containerization is to keep things organized and make it easier to deploy your code in any environment. ASP.NET supports the deployment and building of microservices with Docker.

7. Use logging and tracing

Logging is like keeping a notebook to track important events. In programming, logging helps you understand what's happening in the code and what events are occurring. If problems arise, a .NET developer can review the logs and resolve the issue. Since microservices are distributed throughout the application, it's best to aggregate all logs.

Conclusion

Scalability is crucial in today's fast-paced world. Every hour of downtime costs businesses approximately one million USD. Microservices and .NET can solve scalability problems and provide a solid foundation for your system during peak traffic.