August 2020 Summaries

The text discusses three types of Kubernetes ingress: NodePorts, Load Balancers, and Ingress Controllers. NodePort opens a port on host machines for clients to access applications, while a Load Balancer creates a cloud provider's load balancer in front of nodes. An Ingress Controller is a proxy running in the cluster that provides a single entry point for all services. The text also differentiates between ingress resources and controllers, with an ingress resource being a standard configuration object for an ingress controller.

The text discusses external traffic policy in Kubernetes. It explains how traffic enters a Kubernetes cluster and is routed to the target pod via kube-proxy. Setting ExternalTrafficPolicy=local helps preserve source IPs when using Kubernetes ingress. Additionally, it mentions preserving source IP with Kubernetes ingress through X-Forwarded-For header or using an Edge Stack API Gateway. The text also provides a brief overview of pods and nodes in Kubernetes.