Chapter 8: Testing, Deployment & Production-Ready Spring Boot

Delivering reliable cloud-native services demands a rigorous testing pyramid, lightweight integration testing with real Testcontainers, multi-stage layered Docker packaging, 12-factor production profiles, and Kubernetes deployment orchestration.

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🧭 Subtopics & Curriculum

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Pyramid & Slices8.1

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8.1 Testing Strategy & Test Slices

• 1. The Spring Boot Testing Pyramid
• 2. Spring Test Slices
  • Controller Slice Test with MockMvc:
• 3. Full Integration Testing with @SpringBootTest

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Real Environments8.2

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8.2 Integration Testing with Testcontainers

• 1. Why Testcontainers Beats H2 In-Memory DBs
• 2. DynamicPropertySource with PostgreSQL Container
• 3. Testing Event-Driven Systems with KafkaContainer

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Container Optimization8.3

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8.3 Dockerizing Spring Boot Applications

• 1. The Fat JAR Inefficiency Problem
• 2. Spring Boot Layered JARs
• 3. Production Multi-Stage Dockerfile
  • Key Advantages:

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Cloud-Native Profiles8.4

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8.4 Production Profiles & Configuration

• 1. The Twelve-Factor Config Principle
  • Rule of Environment Variables in Spring Boot:
• 2. Secrets Management & Vault Integration
• 3. Graceful Shutdown Configuration

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Orchestration & Probes8.5

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8.5 CI/CD & Kubernetes Deployment

• 1. GitHub Actions CI/CD Pipeline
• 2. Kubernetes Deployment Manifest
• 3. Liveness vs Readiness Probes

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