This article is translated from https://learnk8s.io/kubernetes-network-packets, not word for word, with some of my own understanding worked in. By reading this article, you can learn how packets are forwarded inside and outside Kubernetes, starting from the original web request all the way to the container hosting the application. Kubernetes Network Requirements Before diving into the details of how packets flow through a Kubernetes cluster, let’s first clarify Kubernetes’ requirements for networking.

While working on servers recently, I ran into a few concepts I wasn’t clear about, so I looked up some references and organized them as follows. 1. The BLP Security Model The model divides the entities in an information system into two parts: Subject: the entity performing the operations, such