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Microservicessystem_design~12 mins

Docker Compose for local development in Microservices - Architecture Diagram

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System Overview - Docker Compose for local development

This system uses Docker Compose to run multiple microservices locally on a developer's machine. It allows easy startup, networking, and management of services like API, database, and cache for development and testing.

Key requirements include isolated service environments, easy service communication, and quick rebuilds without affecting the host system.

Architecture Diagram
  +---------+       +-------------+       +------------+
  |         |       |             |       |            |
  |  User   +------>+ API Service +------>+  Database  |
  |         |       |             |       |            |
  +---------+       +------+------+       +------+-----+
                             |                     |
                             |                     |
                             v                     v
                        +----+-----+           +---+---+
                        |          |           |       |
                        |  Redis   |           |  Logs |
                        |  Cache   |           |       |
                        +----------+           +-------+

All services run inside Docker containers managed by Docker Compose.
Components
User
client
Sends requests to the API service for testing and development.
API Service
service
Handles business logic and routes requests to database or cache.
Database
database
Stores persistent data for the application.
Redis Cache
cache
Caches frequent data to speed up responses.
Logs
service
Collects and stores logs from other services for debugging.
Request Flow - 8 Hops
User → API Service
API Service → Redis Cache
Redis Cache → API Service
API Service → Database
Database → API Service
API Service → Redis Cache
API Service → User
API Service → Logs
Failure Scenario
Component Fails:Redis Cache
Impact:Cache misses increase, causing more database queries and slower responses.
Mitigation:API service falls back to database queries; Docker Compose can restart Redis container automatically.
Architecture Quiz - 3 Questions
Test your understanding
Which component does the user communicate with directly in this Docker Compose setup?
ARedis Cache
BDatabase
CAPI Service
DLogs
Design Principle
This architecture shows how Docker Compose simplifies running multiple microservices locally by managing containers, networking, and dependencies. It enables developers to simulate a production-like environment with isolated services communicating over defined networks, improving development speed and reliability.