API Gateway & Service Mesh

Bu bölüm, API gateway ve service mesh teknolojilerinin modern dağıtık sistemlerdeki rolünü, mimari desenleri ve best practices’i kapsar.

1. API Gateway Nedir?

• Reverse proxy, centralized entry point, request routing
• Authentication, authorization, SSL termination

2. Routing ve Load Balancing

• Path-based, host-based, header-based routing
• Weighted routing, canary release, blue/green deployment

3. Rate Limiting ve Throttling

• API anahtarı, JWT, IP bazlı rate limiting
• Burst control, quota management

4. Authentication ve Security

• OAuth2, JWT, API key, mutual TLS
• CORS yönetimi, request validation, input sanitization

5. Service Mesh Entegrasyonu

• Istio, Linkerd, Consul Connect ile service-to-service security
• Traffic shaping, circuit breaking, distributed tracing

6. Monitoring ve Observability

• Access log, metrics, distributed tracing
• Health checks, alerting, incident response

7. Best Practices ve Sık Karşılaşılan Sorunlar

• Gateway as single point of failure, scaling strategies
• Configuration drift, versioning, backward compatibility

Her başlık altında örnekler, mimari diyagramlar ve ileri seviye detaylar için ilgili alt bölümlere göz atabilirsiniz.