Microservices become the enterprise standard for designing applications.
Microservices promote loose coupling, agility, and allow each service to scale/evolve independently. Due to these advantages, microservices become a de-facto standard for enterprise applications and wide adoption across the world.
Microservice architecture is an approach of developing an application as a set of discrete small services, each running on its own process and communicate through lightweight mechanisms like messaging, REST, gRPC etc.
Microservice philosophy is “Do one thing and Do it well”. i.e Each service focuses on one responsibility and ensures responsibility is very well taken care of.
Characteristics of a Microservice.
- Independent and Autonomous
- Highly Extensible
- Individually Scalable
- Highly Available
- Fault isolation
- Adopting automation as much as possible
By adopting 12-factor principles into your Microservice design, you can ensure your application is scalable and most resilient. If you would like to have a quick intro to 12-factor principles you can refer to this 12-factor principles article
In this article, we would like to talk about how to approach the Microservices and challenges that arise when dealing with them and possible patterns to provide resolutions for the challenges. Each challenge will be discussed in an individual article.
How to approach a Microservice design for an application
Below are the key decisions that should be thoroughly evaluated and considered for implementation.
- Identifying the required services for your application (Decomposition Pattern)
- Identifying the right data storage for data in the system (Database Patterns)
- Security (Authentication and Authorization patterns) implementation for your system
- Communication pattern between the services (Communication Pattern)
- Integrate your Microservices into other systems (Client Apps / External systems)
- How to retrieve data from multiple services when needed (Request aggregation patterns)
- Managing the Transactions across the Microservices (Distributed Transaction Management Patterns)
- Log aggregation, request Tracing, monitoring (Observability Patterns)
- Fault tolerance and resiliency of the system
- Adopting agility with DevOps practices
It is good to have the challenges resolutions are incorporated into your solution from the initial phases itself. It allows you to battle test your application instead of waiting till end.
Prematurely adopting the Microservices into organization leads to critical issues and hampers your application development.
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