What is a production readiness checklist for Spring Boot applications? Spring Boot applications के लिए production readiness checklist क्या है?

Production checklist includes health checks, monitoring, logging, security, scalability, disaster recovery, documentation, testing, and compliance. Ensure application can handle production loads and failures gracefully.

// PRODUCTION READINESS CHECKLIST

// 1. APPLICATION HEALTH
// ✓ Actuator endpoints enabled
// ✓ Liveness/readiness probes configured
// ✓ Health checks for dependencies
management:
  endpoint:
    health:
      show-details: always
  health:
    livenessstate:
      enabled: true
    readinessstate:
      enabled: true

// 2. MONITORING & OBSERVABILITY
// ✓ Metrics exported to Prometheus
// ✓ Logs aggregated (ELK stack)
// ✓ Distributed tracing enabled (Zipkin)
// ✓ Alerts configured
management:
  endpoints:
    web:
      exposure:
        include: metrics,health,info,zipkin

// 3. SECURITY
// ✓ HTTPS enabled
// ✓ Authentication implemented
// ✓ Authorization configured
// ✓ Secrets management
// ✓ Input validation
// ✓ Security headers set
server:
  ssl:
    enabled: true
    key-store: ${SSL_KEYSTORE}

// 4. SCALABILITY
// ✓ Horizontal scaling ready
// ✓ Connection pooling configured
// ✓ Caching implemented
// ✓ Database query optimized
// ✓ Async processing enabled
spring:
  datasource:
    hikari:
      maximum-pool-size: 20

// 5. PERFORMANCE
// ✓ Response time < 1s (p95)
// ✓ Memory footprint < 512MB
// ✓ CPU usage < 80%
// ✓ GC pauses < 100ms
// ✓ Database queries optimized

// 6. RESILIENCE
// ✓ Circuit breakers implemented
// ✓ Retry logic with backoff
// ✓ Timeouts configured
// ✓ Graceful degradation
// ✓ Dead letter queues for messages
@Configuration
public class ResilienceConfig {
    @Bean
    public CircuitBreaker circuitBreaker() {
        // Circuit breaker implementation
    }
}

// 7. DATA PERSISTENCE
// ✓ Database backups configured
// ✓ Transactions properly handled
// ✓ Connection pools monitored
// ✓ Migrations tested
// ✓ Data retention policies

// 8. DISASTER RECOVERY
// ✓ Backup strategy implemented
// ✓ Recovery time objective (RTO) defined
// ✓ Recovery point objective (RPO) defined
// ✓ Failover mechanism tested
// ✓ Disaster recovery drills

// 9. TESTING
// ✓ Unit tests > 80% coverage
// ✓ Integration tests written
// ✓ Load testing completed
// ✓ Security testing done
// ✓ Chaos engineering tested

// 10. DOCUMENTATION
// ✓ API documentation (Swagger)
// ✓ Deployment guide written
// ✓ Troubleshooting guide
// ✓ Runbook for operations
// ✓ Architecture diagrams

// 11. COMPLIANCE
// ✓ Data privacy (GDPR, CCPA)
// ✓ PCI DSS for payments
// ✓ Audit logging
// ✓ Legal requirements met
// ✓ Accessibility (WCAG)

// 12. OPERATIONS
// ✓ Deployment pipeline automated
// ✓ Blue-green deployments
// ✓ Canary releases capability
// ✓ Quick rollback capability
// ✓ On-call support process

// 13. INFRASTRUCTURE
// ✓ Load balancing configured
// ✓ Auto-scaling policies
// ✓ Resource quotas defined
// ✓ Network policies
// ✓ Cost monitoring

// Production Deployment Checklist Script
#!/bin/bash
echo '=== Production Readiness Checklist ==='
echo '[] Actuator health checks pass'
echo '[] Metrics export working'
echo '[] Logging level set to INFO'
echo '[] HTTPS configured'
echo '[] Authentication working'
echo '[] Database backups working'
echo '[] Load testing passed (1000 req/sec)'
echo '[] Memory < 512MB'
echo '[] Response time p95 < 1s'
echo '[] Security scan passed'
echo '[] Documentation complete'
echo '[] Team trained'
echo '==================================='

// Common Production Issues & Solutions:
// Issue: High memory usage
// Solution: Heap dump analysis, GC tuning

// Issue: Slow queries
// Solution: Query optimization, indexing

// Issue: Connection pool exhaustion
// Solution: Increase pool size, query optimization

// Issue: OutOfMemory errors
// Solution: Increase heap size, fix memory leaks