Software Engineering

What Are Microservices?. Microservices are a type of software… | by Sabesan Sathananthan


Microservices design focuses on categorizing programs that are otherwise huge and cumbersome. Each microservice is focused on a certain feature or function of an application. Several of these microservices are combined to make a single, efficient application.

This instinctive, functional split of an application has a lot of advantages. The user interface can be used by the client to make requests. Simultaneously, one or more microservices are engaged to accomplish the desired operation via the API gateway.

Advantages of Microservices Architecture

In application development using microservice architecture is a beneficial approach. A microservice is an independent process. This process can run locally, on another server, or in the cloud (such as cloud services and cloud function FaaS). Its characteristics are the same as service-oriented architecture, but because it is lighter, the decoupling and service-oriented functions can be done more thoroughly. Also, it can be standardized, the same container will have the same result no matter where it is run, so there are many SaaS products on the market that provide standardized microservices.

  • Scaling up requires less development work.

As microservices are self-contained, smaller development teams may work on different components simultaneously to update current functionality. This makes it much easier to not just discover and scale hot services independently of the rest of the app, but also to enhance the app as a whole.

Each microservice setups a full-stack application. At any point, microservices are to be deployed independently. It’s simple for development teams to work on one microservice to solve bugs and then redeploy it without redeploying the entire application because microservices are granular in nature.

Even a minor component failure might render the entire application inoperable in a monolithic application. Determining the mistake can occasionally be time-consuming. Since the entire program is separated into independent, fully functional software components, identifying the problematic component is simple when using microservices. Other unrelated units will still work even if errors happen.

  • No reliance on a single tech stack

A set of programming languages, front-end and back-end tools, frameworks, databases, and other similar elements are collectively referred to as a technological stack and are used by developers to create applications. Developers can choose a technology stack with microservices that is most suited for a certain microservice and its functions.

Microservice architecture accelerates and optimizes software development. Agile deployment aptness combined with flexible application of various technologies significantly reduces the development cycle duration. Microservices architecture is used for data processing tasks, media content (ie. Netflix, Amazon Prime), website migration, handling transactions and generating invoices.

Docker, which debuted in 2014, completely changed how software is developed. It enables program containerization, uses a minimal amount of system resources, and lets each container create its own operating environment.

Evidently, “service-oriented architecture” can be implemented using containers, and each service now resides in a container rather on a server. Multiple servers are not required in this method. To construct a service-oriented architecture, which was previously impossible, the system runs several containers in the most basic scenario. Microservices are the name of this implementation. Microservices are service-oriented architectures that make use of container technology. Although it still uses “service” as a functional unit, the implementation is now lightweight, just requiring a new container (a process), thus the term “microservice”.

Challenges in microservice

From deployment through operation and maintenance, the microservices architecture has its share of difficulties. Some of the hurdles are discussed below.

  • Inter-service communication

A microservice frequently need to communicate and interact with another microservice to meet certain demands or complete particular tasks. This demand maintains a fully functional API providing a channel of communication between various services making up the application.

When many microservices are implemented as a component of an application, each of these services has a unique logging method. As a result, there are significant amounts of dispersed log data that are unstructured and challenging to manage.

Distributed transactions are those that need a number of microservices to be deployed and operating correctly in order to complete. This implies that a transaction involves several microservices and databases, and it will fail if even a little error is in just one of them.

In a microservices architecture, codependency between two or more application services or modules is referred to as a cyclic dependency. It may be challenging to grow the application or separately deploy and manage microservices due to cyclical dependencies. Additionally, they are notorious for making code harder to maintain. Decoupling becomes very hard if they continue for a while.