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Microservicessystem_design~12 mins

Independent service pipelines in Microservices - Architecture Diagram

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System Overview - Independent service pipelines

This system uses independent service pipelines to handle different business functions separately. Each service has its own deployment, database, and scaling, allowing teams to work independently and the system to scale efficiently.

Key requirements include isolation of failures, independent scaling, and clear communication between services.

Architecture Diagram
User
  |
  v
Load Balancer
  |
  v
API Gateway
  |
  +-------------------+-------------------+
  |                   |                   |
Service A           Service B           Service C
  |                   |                   |
Database A          Database B          Database C
  |                   |                   |
Cache A             Cache B             Cache C
Components
User
client
Initiates requests to the system
Load Balancer
load_balancer
Distributes incoming requests evenly to API Gateway instances
API Gateway
api_gateway
Routes requests to appropriate independent services
Service A
service
Handles business logic for feature A independently
Service B
service
Handles business logic for feature B independently
Service C
service
Handles business logic for feature C independently
Database A
database
Stores data for Service A
Database B
database
Stores data for Service B
Database C
database
Stores data for Service C
Cache A
cache
Speeds up data access for Service A
Cache B
cache
Speeds up data access for Service B
Cache C
cache
Speeds up data access for Service C
Request Flow - 11 Hops
User → Load Balancer
Load Balancer → API Gateway
API Gateway → Service A
Service A → Cache A
Cache A → Service A
Service A → Database A
Database A → Service A
Service A → Cache A
Service A → API Gateway
API Gateway → Load Balancer
Load Balancer → User
Failure Scenario
Component Fails:Database B
Impact:Service B cannot read or write data, causing feature B to fail. Cache B may serve stale data for reads.
Mitigation:Use database replication for failover. Cache B continues serving stale reads. Service B returns error for writes until DB recovers.
Architecture Quiz - 3 Questions
Test your understanding
Which component directs user requests to the correct independent service?
ACache
BLoad Balancer
CAPI Gateway
DDatabase
Design Principle
This architecture shows how independent service pipelines enable teams to develop, deploy, and scale services separately. It isolates failures so one service's problem does not affect others, improving system resilience and flexibility.