Microservices Patterns

Breaking a complex monolith system into a set of collaborating microservices pays rich dividends in terms of auto-scaling, time-to-market and adopting modern technologies, etc, to name a few. So far, we have seen how a monolith like UMS (user management system) can be decomposed and deployed in a polyglot environment. In this twelfth and last part of the series, we take a look at the patterns that are central to the success of microservices architecture. We conclude with the final design of the UMS.

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Microservices are relatively small in size and easy in complexity, in comparison with monolith systems. It doesn't mean that chopping down a complex system into smaller microservices will automatically solve the problem. There are two aspects to microservices.

Decomposition is invariably one of them. The domaindriven design lays fundamental principles that govern the decomposition. The success of microservices architecture also depends on the second aspect, i.e., deployment. It deals with how these microservices are collaborated, exposed, monitored and managed.

There are quite a few patterns in the area of microservices that are popular. Tools like Dockers for containerisation and Kubernetes for orchestration implement some of these patterns. For instance, we have seen how easy it is to deploy containerised services like AddService, FindService and SearchService without worrying about draining the resources.

We have also seen how Kubernetes is helpful in creating and managing the replicas of these services to scale. Let us have a look at a few more microservices patterns.

Data management patterns