We have been building applications and getting better at it for years and a variety of technologies, architectural patterns, and best practices have been developed along this period. Microservices is an architectural pattern that has emerged during those years, especially because of containers. Docker is the main actor of all these changes because it has popularized containers and helped us containerizing our applications.
Microservice architecture is a variant of the service-oriented architecture that organizes an application as a collection of loosely coupled services. These services are responsible for specific tasks and can communicate with each other through simple APIs to solve a larger complex business issue. Summarizing, microservices are a particular technique for developing software systems that attempt to concentrate on structuring single-function modules with well-defined interfaces and operations.
Pros & Cons
Microservices are used to speed up development, feature release, ease scalability; they offer improved fault isolation, etc. If you are developing an application and it has to support a variety of different clients including desktop, mobile browsers, and native mobile applications, you must consider implementing your application using microservice architecture.
Microservices also bring complexity to network, testing, deploying, monitoring, etc. Team communication can be hard without using automation and Agile methodology. You also might have to introduce CI/CD tool, configuration management, and application-deployment tool, service mesh, and API gateway to help you with testing, building, shipping, discovering and connecting all services.
Along all these years we have improved the way we develop systems and we’ll keep doing it. If you automate and do everything in the right way, you probably won’t face issues and will love microservices. All software architectural patterns and styles have their pros and cons and microservices architecture isn’t different but it helps us to be more agile.
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