EKS Networking Issue Map

EKS Networking Issue Map An architecture diagram generated by Archify. Networking Issues · EKS cluster · Architecture component Networking Issues EKS cluster Pod-to-Pod Communication Issues · causes · steps · solutions · Architecture component Pod-to-Pod Communication Issues causes · steps · solutions Service Access Issues · causes · steps · solutions · Architecture component Service Access Issues causes · steps · solutions Load Balancer Issues · causes · steps · solutions · Architecture component Load Balancer Issues causes · steps · solutions DNS Issues · CoreDNS / kube-dns · Architecture component DNS Issues CoreDNS / kube-dns VPC CNI Issues · IP exhaustion / ENI limits · Architecture component VPC CNI Issues IP exhaustion / ENI limits Common Causes · policy · SG · CNI · CIDR · MTU · Architecture component Common Causes policy · SG · CNI · CIDR · MTU Common Causes · selector · endpoints · kube-proxy · Architecture component Common Causes selector · endpoints · kube-proxy Common Causes · subnet tags · SG · health check · Architecture component Common Causes subnet tags · SG · health check Legend Kubernetes layer AWS layer (VPC / ELB) Common Causes

Pod-to-Pod · Common Causes

  • • Restrictive network policies block pod-to-pod traffic
  • • Restrictive security group rules block pod-to-pod traffic
  • • CNI plugin configuration or version issues
  • • Pod CIDR range conflicts
  • • MTU mismatch between network interfaces

Service Access · Common Causes

  • • Service selector does not match pod labels
  • • Service endpoints are not created
  • • Pods are not ready
  • • Service port does not match the pod port
  • • kube-proxy issues

Load Balancer · Common Causes

  • • Missing load balancer subnet tags
  • • Restrictive security group rules
  • • Load balancer health check failures
  • • Incorrect service annotations
  • • Quota exceeded