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Have you ever wondered, What is Microservices and how the scaling industries integrate with them while building applications to keep up with their client expectations?
To get an idea of What is Microservices, you have to understand how a monolithic application is decomposed into small tiny micro applications which are packaged and deployed independently. This blog will clear your understanding of how developers use microservices to scale their applications according to their need. This blog is a foundation for Microservice Certification Training.
In this blog, you will learn about the following:
Now, before I tell you about microservices, let’s see the architecture that prevailed before microservices i.e. the Monolithic Architecture.
In layman terms, you can say that its similar to a big container wherein all the software components of an application are assembled together and tightly packaged.
Listed down are the challenges of Monolithic Architecture:
Figure 1: What Is Microservices – Challenges of Monolithic Architecture
The above challenges were the main reasons that led to the evolution of microservices.
Microservices, aka Microservice Architecture, is an architectural style that structures an application as a collection of small autonomous services, modeled around a business domain.
Figure 2: What Is Microservices – Microservices Representation
In Microservice Architecture, each service is self-contained and implements a single business capability.
Consider an E-commerce application as a use-case to understand the difference between both of them.
Figure 3: What Is Microservices – Differences Between Monolithic Architecture and Microservices
The main difference we observe in the above diagram is that all the features initially were under a single instance sharing a single database. But then, with microservices, each feature was allotted a different microservice, handling their own data, and performing different functionalities.
Now, let us understand more about microservices by looking at its architecture. Refer the diagram below:
Figure 4: What Is Microservices – Microservice Architecture
Now, let us learn more about microservices by looking at its features.
Figure 5: What Is Microservices – Features Of Microservices
Figure 6: What Is Microservices – Advantages Of Microservices
In today’s world, complexity has managed to creep into products. Microservice architecture promises to keep teams scaling and function better.
The following are the best practices to design microservices:
Figure 7: What Is Microservices – Best Practices To Design Microservices
Now, let us look at a use-case to get a better understanding of microservices.
Let’s take a classic use case of a shopping cart application.
When you open a shopping cart application, all you see is just a website. But, behind the scenes, the shopping cart application has a service for accepting payments, a service for customer services and so on.
Assume that developers of this application have created it in a monolithic framework.Refer to the diagram below:
Figure 8: What Is Microservices – Monolithic Framework Of Shopping Cart Application
So, all the features are put together in a single code base and are under a single underlying database.
Now, let’s suppose that there is a new brand coming up in the market and developers want to put all the details of the upcoming brand in this application.
Then, they not only have to rework on the service for new labels, but they also have to reframe the complete system and deploy it accordingly.
To avoid such challenges developers of this application decided to shift their application from a monolithic architecture to microservices.Refer to the diagram below to understand the microservices architecture of shopping cart application
Figure 9: What Is Microservices – Microservice Architecture Of Shopping Cart Application
This means that developers don’t create a web microservice, a logic microservice, or a database microservice. Instead, they create separate microservices for search, recommendations, customer services and so on.
This type of architecture for the application not only helps the developers to overcome all the challenges faced with the previous architecture but also helps the shopping cart application to be built, deployed, and scale up easily.
There is a long list of companies using Microservices to build applications, these are just to name a few:
Figure 10: What Is Microservices – Companies Using Microservices
If you wish to learn Microservices and build your own applications, then check out our Microservices Architecture Training which comes with instructor-led live training and real-life project experience. This training will help you understand Microservices in depth and help you achieve mastery over the subject.
Got a question for us? Please mention it in the comments section of ” What Is Microservices” and I will get back to you.