Container Network Interface (CNI) in Kubernetes: An Introduction

One of the most important things in Kubernetes is to make sure network is correctly configured in the cluster, and pods can communicate with each other and the broader internet. In this article, we’re gonna learn about the Container Network Interface (CNI) and CNI plugins, what they’re supposed to do, and how they’re implemented. We’ll also see a simple CNI implementation in Go and Bash, and test it in a Canonical Kubernetes cluster.