In this article, we will learn together Everything you should know about Microservices architecture. We have been designing systems and applications for several years now and getting better at it day by day, but the tech world is all over microservices. Why? Because microservice architecture is a service-oriented architecture pattern that can break up monolithic applications into smaller service units.
For business enhancement, many companies/industries have started using microservices.
Microservices were used to overcome the challenges of monolithic. Monolithic architecture is similar to a big container wherein all the software components of an application are assembled and packaged.
Let me explain to you the disadvantages of monolithic architecture:
So these above disadvantages of monolithic architecture have led to the evolution of microservice. So, now let us understand what Microservices is in simple words?
Microservices is also called microservice architecture which is an organizational approach to software development where software is composed of small independent services that communicate over APIs which are well-defined.
The microservice architecture contains components depending on the business requirements.
API Gateway- Clients need API Gateway as it is an entry point, which forwards the call to the specific services on the back end. Here API gateway helps in collecting the responses from different services and returns the response to the client.
Microservices- As the name itself suggests that microservices are the services that help in dividing the service into small services that perform a certain business capability like user registration, current orders, or wish list.
Database- Microservices can either share the same database or an independent database.
Inter-microservices communication- REST or Messaging are the protocol to interact with each other.
Now, let us learn more about the features of microservices.
The following table helps to know the importance of using microservice over SOA.
|Design pattern||SOA is a design standard for computer software.||Micro Service is a part of SOA. It is a specialized implementation of SOA.|
|Dependency||SOA is dependent on each other.||Microservice is independent.|
|Size||Software size is bigger than the conventional software.||The software size is small.|
|Technology||The technology stack is less than Microservice.||Microservice is heterogeneous.|
|Nature||Monolithic in nature.||Full-stack in nature.|
|Deployment||Deployment is time-consuming.||Deployment is very easy.|
|Cost-effectiveness||More cost-effective.||Less cost-effective.|
|Scalability||Less compared to Microservices.||Fully scaled.|
Docker with Kubernetes can lead to better results. However, these two aren’t competitors.
Kubernetes is an open-source system for automating the deployment, and management of containers.
Things that can be done with Kubernetes are :
Microservices can be built on different frameworks. Here are the most popular ones:
There are several options to deploy microservices some of them are :
Here are some of the options:
There are many tools you could use to monitor :
Microservices is a revolution in software architecture. Every organisation is taking help from microservices to build their applications. As discussed above, many companies like Netflix, Amazon, Uber, and Spotify are using microservices and taking advantage of them. If you wish to learn more such concepts and build a career in this field, join Great Learning’s PG Cloud Computing Course and upskill today.
Original article source at: https://www.mygreatlearning.com
Companies need to be thinking long-term before even starting a software development project. These needs are solved at the level of architecture: business owners want to assure agility, scalability, and performance.
The top contenders for scalable solutions are serverless and microservices. Both architectures prioritize security but approach it in their own ways. Let’s take a look at how businesses can benefit from the adoption of serverless architecture vs microservices, examine their differences, advantages, and use cases.
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The software industry has come a long journey and throughout this journey, Software Architecture has evolved a lot. Starting with 1-tier (Single-node), 2-tier (Client/ Server), 3-tier, and Distributed are some of the Software Architectural patterns we saw in this journey.
The majority of software companies are moving from Monolithic architecture to Microservices architecture, and Microservices architecture is taking over the software industry day-by-day. While monolithic architecture has many benefits, it also has so many shortcomings when catering to modern software development needs. With those shortcomings of monolithic architecture, it is very difficult to meet the demand of the modern-world software requirements and as a result, microservices architecture is taking control of the software development aggressively. The Microservices architecture enables us to deploy our applications more frequently, independently, and reliably meeting modern-day software application development requirements.
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We have been building software applications for many years using various tools, technologies, architectural patterns and best practices. It is evident that many software applications become large complex monolith over a period for various reasons. A monolith software application is like a large ball of spaghetti with criss-cross dependencies among its constituent modules. It becomes more complex to develop, deploy and maintain monoliths, constraining the agility and competitive advantages of development teams. Also, let us not undermine the challenge of clearing any sort of technical debt monoliths accumulate, as changing part of monolith code may have cascading impact of destabilizing a working software in production.
Over the years, architectural patterns such as Service Oriented Architecture (SOA) and Microservices have emerged as alternatives to Monoliths.
SOA was arguably the first architectural pattern aimed at solving the typical monolith issues by breaking down a large complex software application to sub-systems or “services”. All these services communicate over a common enterprise service bus (ESB). However, these sub-systems or services are actually mid-sized monoliths, as they share the same database. Also, more and more service-aware logic gets added to ESB and it becomes the single point of failure.
Microservice as an architectural pattern has gathered steam due to large scale adoption by companies like Amazon, Netflix, SoundCloud, Spotify etc. It breaks downs a large software application to a number of loosely coupled microservices. Each microservice is responsible for doing specific discrete tasks, can have its own database and can communicate with other microservices through Application Programming Interfaces (APIs) to solve a large complex business problem. Each microservice can be developed, deployed and maintained independently as long as it operates without breaching a well-defined set of APIs called contract to communicate with other microservices.
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The shift towards microservices and modular applications makes testing more important and more challenging at the same time. You have to make sure that the microservices running in containers perform well and as intended, but you can no longer rely on conventional testing strategies to get the job done.
This is where new testing approaches are needed. Testing your microservices applications require the right approach, a suitable set of tools, and immense attention to details. This article will guide you through the process of testing your microservices and talk about the challenges you will have to overcome along the way. Let’s get started, shall we?
Traditionally, testing a monolith application meant configuring a test environment and setting up all of the application components in a way that matched the production environment. It took time to set up the testing environment, and there were a lot of complexities around the process.
Testing also requires the application to run in full. It is not possible to test monolith apps on a per-component basis, mainly because there is usually a base code that ties everything together, and the app is designed to run as a complete app to work properly.
Microservices running in containers offer one particular advantage: universal compatibility. You don’t have to match the testing environment with the deployment architecture exactly, and you can get away with testing individual components rather than the full app in some situations.
Of course, you will have to embrace the new cloud-native approach across the pipeline. Rather than creating critical dependencies between microservices, you need to treat each one as a semi-independent module.
The only monolith or centralized portion of the application is the database, but this too is an easy challenge to overcome. As long as you have a persistent database running on your test environment, you can perform tests at any time.
Keep in mind that there are additional things to focus on when testing microservices.
Test containers are the method of choice for many developers. Unlike monolith apps, which lets you use stubs and mocks for testing, microservices need to be tested in test containers. Many CI/CD pipelines actually integrate production microservices as part of the testing process.
As mentioned before, there are many ways to test microservices effectively, but the one approach that developers now use reliably is contract testing. Loosely coupled microservices can be tested in an effective and efficient way using contract testing, mainly because this testing approach focuses on contracts; in other words, it focuses on how components or microservices communicate with each other.
Syntax and semantics construct how components communicate with each other. By defining syntax and semantics in a standardized way and testing microservices based on their ability to generate the right message formats and meet behavioral expectations, you can rest assured knowing that the microservices will behave as intended when deployed.
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In this video we will see what is microservices architecture and why developers are prefering this architecture over monolithic architecture.
The architecture is explained in simple way using day to day life example.
#microservices #microservices architecture #explained