Build a microservices-based web application for your business
The term microservices architecture has been around for a few years to describe a specific way of designing a software application as a set of independently deployable services. These services communicate with each other using APIs. Some of the common characteristics found in a microservice architecture include:
- Design for failure
- Organized around the company’s capabilities
- Decentralized data management
- Decentralized governance
- Scalable design
- Automation of infrastructure
- Products and not Projects
- Components via services
Why use a microservices-based web application?
Microservices was designed to solve the problems caused by gigantic applications based on a monolithic architecture. It is widely used by large scale websites to achieve the following benefits:
- Developers can work on a smaller code base compared to a large and complex monolithic application.
- Highly defined responsibilities for developers, i.e. a team can assign application components to speed up code review and perform quick updates.
- The microservices-based web application will no longer depend on a library or programming language. Thus, developers can choose the one that they think best suits their needs.
- It will be easier to scale each service independently without creating multiple instances for everything.
- By using microservices, continuous delivery will become easier.
- You can choose different databases or storage for the microservices architecture to decentralize data.
- An error or bug in one service will not shut down the whole system because each component or service remains in its containers.
How to design a microservices-based web application
When you design a web application based on a microservices architecture, there are a few key points to consider. These key points include the specification of the application, best practices for designing microservices, the twelve-factor methodology, the value of deploying services in containers, and orchestration using Kubernetes. So let’s get started!
The applied for web application will process requests by executing business logic, accessing databases, and then returning JSON, XML, or HTML responses. The app must therefore support multiple clients consisting of traditional web apps, mobile web apps, single page apps, and native mobile apps. It should also have APIs to consume data from third-party websites or apps.
The application should primarily contain user interface (UI) components, business or domain logic, database access components, and application integration logic. In addition, the application must have high scalability and deployment capacity in multiple infrastructure environments.
Best practices for designing microservices
By following best practices for designing microservices, you can easily maintain, scale, and deploy your application. Keep in mind that not all of the best practices given will be relevant to your application requirements.
Each microservice should have a single application functionality. The team must define the responsibilities and limits of each department. Apart from that, you need to consider the given requirements for your web application.
- The microservice must respond to requesting customers, even if the service fails.
- When you update or add functionality to the microservice, the changes should not affect the client, and the Rest API is backward compatible.
- The design should facilitate troubleshooting and monitoring.
- The microservice must specify communication protocols between the API gateway, clients, and microservices.
Understand the methodology of the twelve-factor application
The 12-Factor Application Methodology for Application Development is a set of guidelines and rules for building cloud-native and Software-as-a-Service applications. According to the 12-factor methodology, a microservice must adhere to the following guidelines. The rules here consist of codebase, dependencies, configuration, support services, processes, port binding, concurrency, build, publish and run, handicap, journals, administration processes and parity of development and production.
Importance of deploying microservices in containers
After the development of the microservice, it should be containerized. A microservice running in its individual container will not affect microservices deployed in the separate containers.
Now you might be thinking what a container is, right?
A container is a standard software unit used to develop, ship, and deploy an application. Container engines like Docker are used to manage containers. These container engines provide the tools necessary to group application dependencies into containers.
Docker can be used to develop, deploy, and run a microservice application in the container. Dockers with microservices will have the following characteristics.
- Lightweight: Because docker shares its operating system kernel and does not need an operating system for instances, microservices run as a lightweight process.
- Portable: With docker, microservices become portable and can run anywhere.
- Secure: The isolation of each process secures microservices.
To containerize a microservice, you need to create a Dockerfile, a container image that contains all the environmental configurations and dependencies, then deploy the image to the Docker engine and upload the image to the container registry for storage and retrieval. data.
Microservices must interact, integrate, and provide required functionality to the application while running in containers. This integration can be gained using container orchestration.
Container orchestration allows a developer to create, suspend, and group containers into clusters. Orchestration also enables high scalability and availability of microservices. To fulfill the task of orchestrating containers, we use the Kubernetes platform. This will help you manage your containers in one place.
Hope this has been helpful to you in understanding how microservices architecture based web applications are developed for your business. Having a microservice will help you achieve higher scalability, independent development and deployment, reduced risk of system failure, and more.