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Microservicessystem_design~12 mins

Dockerfile for microservices - Architecture Diagram

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System Overview - Dockerfile for microservices

This system shows how microservices are packaged and deployed using Docker containers. Each microservice has its own Dockerfile to create a lightweight, isolated environment. The system ensures scalability, easy updates, and independent deployment of services.

Architecture Diagram
User
  |
  v
Load Balancer
  |
  v
+-------------------+     +-------------------+     +-------------------+
| Microservice A     | --> | Microservice B     | --> | Microservice C     |
| (Docker Container) |     | (Docker Container) |     | (Docker Container) |
+-------------------+     +-------------------+     +-------------------+
       |                         |                         |
       v                         v                         v
+-------------+           +-------------+           +-------------+
| Database A  |           | Database B  |           | Database C  |
+-------------+           +-------------+           +-------------+
Components
User
user
Sends requests to the system
Load Balancer
load_balancer
Distributes incoming requests evenly to microservices
Microservice A
service
Handles specific business logic packaged in a Docker container
Microservice B
service
Handles another business domain, isolated in its own Docker container
Microservice C
service
Handles a third business domain, running in a separate Docker container
Database A
database
Stores data for Microservice A
Database B
database
Stores data for Microservice B
Database C
database
Stores data for Microservice C
Request Flow - 6 Hops
User → Load Balancer
Load Balancer → Microservice A
Microservice A → Database A
Database A → Microservice A
Microservice A → Load Balancer
Load Balancer → User
Failure Scenario
Component Fails:Load Balancer
Impact:All incoming requests fail to reach microservices, causing system downtime
Mitigation:Use multiple load balancers with failover and health checks to ensure availability
Architecture Quiz - 3 Questions
Test your understanding
Which component directs user requests to the correct microservice container?
ALoad Balancer
BDatabase
CUser
DMicroservice
Design Principle
This architecture shows how Docker containers enable microservices to run independently, allowing easy scaling and updates without affecting other parts. The load balancer ensures requests are distributed efficiently, and separate databases isolate data per service, improving fault tolerance.