Microservices Architecture

Microservices architecture have many benefits for organizations, especially for Agile and DevOps teams. Companies of all sizes use microservices architecture in development. Without microservices architecture, applications are built as a singular unit (also known as monolithic systems)– which means that any changes will be slow and can impact the entire system. Any modifications made to a small section of code will have a huge impact on the rest of the system; this means that the entire system needs to be retested, rechecked, and redeployed. A business many even need a new version of the software used. This makes changing or scaling incredibly difficult.

Microservices architecture changes that. It helps systems and applications to be as modular as possible. What microservices does is take every facet of the application down to its simplest form, building a suite of small services that are each independent – in terms of processes, testing, and deployment. These services can be written individually in different languages that each fit within the task. Microservices architecture results in a system that is scalable, agile, and flexible.


Microservices Architecture Example

One microservices architecture example is prevalent on a website many people visit every day: Amazon. Over the last few years, Amazon has migrated to a microservice architecture. Every day, they get countless clicks and calls on their applications, including their software then uses the Cloud to keep track of information. There are different applications that manage web service API, sales, and user interaction. They process credit card payments, monitor reviews, and add thousands of new products on a daily basis. Without microservices architecture, problems and changes could derail the entire website.

Microservices Based Architecture

Microservices based architecture has one goal: build a system that is easy to develop and deploy. It breaks down every application into its smallest parts and ensures that it does that one thing well.

The services are all small and perform a single functionality – overloading them could result in that monolithic development that so many are moving away from today. Microservices based architecture also leads to a culture where the automation of testing and deployment is engrained – meaning people and teams can work individually. This will ease the burden of management and operations.

Microservices Reference Architecture

In microservices reference architecture, each application is composed of many components and this development style if an evolution of Services Oriented Architecture (SOA). Microservices reference architecture (MRA) uses industry standard components such as:

  • Docker containers
  • Java
  • PHP
  • Python
  • NodeJS/JavaScript
  • Ruby

With these different languages and development styles comes the complication of moving to microservices using the network to communicate. In older systems, that communication takes place using memory. Within microservices, that communication happens over the network – which means that the network has to be designed and implemented perfectly.

Microservices reference architecture uses three different networking models:

  • Proxy Model – This is a simple networking model that is suitable for many different tools for a microservices application. This model is probably the most popular method used today.
  • Router Mesh Model – This is a more vigorous approach to building.
  • Fabric Model – Probably the most significant MRA, the Fabric Model works best for high‑load systems and supports SSL/TLS at all levels.

Reactive Microservices Architecture

Reactive microservices architecture aim to divide and conquer a system. They want to break each system down into individual services, or isolate them. The decomposition of a system into the subsystems or subservices allow for easier communication. It is also a prerequisite for resilience and elasticity that is required in systems.

Reactive microservices architecture allows time and space between the different services, meaning they can be developed, tested, and deployed autonomously. However, they do still react to each other, as is necessary in many situations.

When adopting microservices, one of the most important things to do is to minimize the need for coordination, contention, and coherency. To find reactive microservices architecture or building an isolated service that is scalable, incredibly resilient to failure, and is easy to combine with other services to form a cohesive system, click here for a free white paper.

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