One of the fundamental requirements of the Kubernetes networking model is that each Pod must have its own IP address for communication. Many newcomers to Kubernetes are initially unclear on how IP addresses are assigned to each Pod.
They understand how various components function independently but may not grasp how these components work together. For instance, they might know what CNI plugins are but not how they are invoked. In this article, I will try to explain how various networking components interact within a Kubernetes cluster and assist in assigning IP addresses to each Pod.
Container Network Basics
Container networking enables containers to communicate with each other and other network endpoints. It’s essential for containerized applications, especially those deployed across multiple containers and hosts, to talk to one another securely and efficiently.
Container networking abstracts the complexity of network implementation, allowing containers to connect through well-defined network interfaces, regardless of their physical location or the infrastructure they run on.
