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Overview
A typical microservices architecture usually includes the following components:
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Load Balancer: Used to distribute incoming traffic to multiple API Gateway instances to improve availability.
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Content Delivery Network (CDN, Content Delivery Network): A CDN is a set of geographically distributed servers used to store static content to speed up the delivery of content. The client first looks for content in the CDN and then accesses the backend service.
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API Gateway: Processes incoming requests and routes them to relevant services. It communicates with identity providers and service discovery.
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Identity Provider: Handles user authentication and authorization.
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Service Registry & Discovery: The registration and discovery of microservices are performed in this component. The API gateway will find related services in this component for communication.
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Management: This component is responsible for monitoring the health of the service.
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Microservices: Microservices are designed and deployed in different domains, and each domain has its own database. API gateway communicates with microservices through REST API or other protocols, while microservices in the same domain communicate using RPC (Remote Procedure Call).
The advantages of microservices architecture include:
- Can be quickly designed, deployed and scaled horizontally.
- Each domain can be maintained independently by a dedicated team.
- Business requirements can be customized and better supported in each area.
Disadvantages of microservices architecture include:
- System complexity increases, requiring more management and monitoring.
- Deployment and maintenance of distributed systems can be more complex.
- Effective coordination and communication mechanisms are needed to ensure that different microservices work together.
Illustration
summary
Regarding converting a monolithic system to a microservices architecture, it is possible, but how long it takes depends on several factors, including the complexity of the existing system, the skill level of the team, resource commitment, etc. This process can take months or even years to complete. Successful migration often requires careful planning and a gradual migration strategy to reduce disruption and risk.
