Lesson 6: Networking & Ingress - Kubernetes Production Mastery
Автор: platform-engineering-playbook
Загружено: 2025-11-19
Просмотров: 5
Master Kubernetes networking fundamentals - CNI plugins, the flat network model, Service types (ClusterIP, NodePort, LoadBalancer), Ingress controllers with TLS termination, and when service mesh adds value versus unnecessary complexity.
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Summary:
• Kubernetes uses a flat network model where every pod gets its own IP and can communicate without NAT - CNI plugins like Calico, Cilium, and Flannel implement this
• ClusterIP is internal-only (default), NodePort exposes on node IPs (dev/testing), LoadBalancer provisions cloud load balancers (production external access)
• Ingress controllers (nginx, Traefik, HAProxy) provide HTTP routing, TLS termination, and path-based routing - use cert-manager for automated certificate management
• Service mesh (Istio, Linkerd) adds mutual TLS, traffic splitting, and observability but increases complexity - only adopt when you need the features
• Common networking failures: pods can't reach services (DNS issues), 502 errors (backend pod not ready), TLS failures (certificate misconfigurations)
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