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Microservicessystem_design~12 mins

Multi-stage builds in Microservices - Architecture Diagram

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System Overview - Multi-stage builds

This system uses multi-stage builds to create efficient, small, and secure container images for microservices. The build process separates compiling code and packaging the final image, reducing size and improving deployment speed.

Architecture Diagram
User
  |
  v
Load Balancer
  |
  v
API Gateway
  |
  v
+-------------------+       +-------------------+
| Build Stage 1:     |       | Build Stage 2:     |
| Compile & Test     |-----> | Package & Optimize |
+-------------------+       +-------------------+
          |                          |
          v                          v
    Intermediate Image          Final Image
          |                          |
          +------------> Deployment Environment
                                   |
                                   v
                              Microservices
                                   |
                                   v
                              Database
                                   |
                                   v
                              Cache
Components
User
user
Initiates requests to the microservices system
Load Balancer
load_balancer
Distributes incoming user requests evenly across API Gateway instances
API Gateway
api_gateway
Routes requests to appropriate microservices and handles authentication
Build Stage 1: Compile & Test
build_stage
Compiles source code and runs tests to produce intermediate build artifacts
Build Stage 2: Package & Optimize
build_stage
Packages compiled code into a minimal container image, removing build tools
Intermediate Image
container_image
Contains compiled code and build dependencies, used only during build
Final Image
container_image
Minimal container image with only runtime dependencies, deployed to production
Deployment Environment
deployment
Runs the final container images as microservices
Microservices
service
Handles business logic and user requests
Database
database
Stores persistent data for microservices
Cache
cache
Speeds up data access by storing frequently used data
Request Flow - 11 Hops
User → Load Balancer
Load Balancer → API Gateway
API Gateway → Microservices
Microservices → Cache
Cache → Microservices
Microservices → Database
Database → Microservices
Microservices → Cache
Microservices → API Gateway
API Gateway → Load Balancer
Load Balancer → User
Failure Scenario
Component Fails:Build Stage 2: Package & Optimize
Impact:Final container image is not created or is incomplete, blocking deployment of microservices
Mitigation:Use build retries, store intermediate images, and alert developers to fix packaging issues
Architecture Quiz - 3 Questions
Test your understanding
What is the main purpose of the first build stage in multi-stage builds?
ACompile code and run tests
BDeploy microservices to production
CServe user requests
DCache frequently used data
Design Principle
Multi-stage builds separate the concerns of compiling and packaging, enabling smaller, secure container images. This improves deployment speed and reduces runtime resource usage by excluding unnecessary build tools.