Cluster Architecture Design
Production environments should have at least 3 Master nodes (HA), with Worker nodes auto-scaling based on load. Deploy Etcd independently with SSD storage. Calico is recommended for networking (Network Policy support), with Nginx Ingress Controller for ingress.
Monitoring and Alerting
Prometheus + Grafana + AlertManager stack: Prometheus collects metrics, Grafana visualizes, AlertManager handles alert routing. Key metrics: Pod restart counts, node CPU/memory utilization, API Server latency, PV usage.
Security Hardening
Enable RBAC; use Network Policies to restrict pod-to-pod communication; regularly update cluster versions; image scanning (Trivy/Clair); Pod Security Standards replacing deprecated PodSecurityPolicy.
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