Services

Micro Services Development​

Microservices is an architectural style for designing software applications as a collection of small, loosely coupled services. Each service is responsible for a specific business function and can be developed, deployed, and scaled independently. This approach contrasts with monolithic architecture, where an application is built as a single, unified unit.

Key Characteristics of Microservices:

1. Single Responsibility: Each microservice focuses on a specific business function or domain (e.g., user authentication, payment processing, inventory management).
2. Independence: Services are autonomous and communicate with each other through well-defined APIs, often using protocols like HTTP, gRPC, or messaging queues.
3. Scalability: Since microservices are independent, they can be scaled individually depending on demand. For example, if one service experiences high traffic, only that service can be scaled without affecting others.
4. Technology Diversity: Different services can be written in different programming languages, use different databases, or even run on different platforms, as long as they communicate via standard interfaces.
5. Resilience: Failure in one service doesn’t necessarily bring down the entire system. With good design, such as retries, fallbacks, and circuit breakers, a failure in one microservice can be isolated.
6. Deployment and Updates: Microservices allow for faster and independent updates, as changes in one service don’t require redeploying the entire application.

Advantages:

• Flexibility in Development: Teams can work on different services simultaneously without stepping on each other’s toes.
• Faster Releases: Smaller, independent services are easier to test and deploy, enabling faster release cycles.
• Better Fault Isolation: A failure in one service doesn’t necessarily bring down the whole system, reducing the impact of failures.
• Technology Agnostic: Different services can use different technologies, allowing teams to choose the best tool for each job.

Microservices in Action:

• Financial Systems: Different services could handle user authentication, Mortgage loan orgination module – 1003 applicaiton, Loan pricing functionality, Exceptions management and other third party services integration.

Common Tools and Technologies in Microservices:

CI/CD Pipelines: Essential for automating the deployment of services and ensuring that code changes are continuously integrated and tested.

Containers (Docker): Used to package each service and its dependencies, ensuring consistency across environments.

Orchestration (Kubernetes): Helps automate the deployment, scaling, and management of containers.

API Gateway: A single entry point for all client requests, which can route to the appropriate microservice.

Service Mesh: Manages communication between services, handling concerns like load balancing, service discovery, and monitoring (e.g., Istio, Linkerd).