Introduction to Linux Netkit interfaces — with a grain of eBPF

This post is the first in a 2 part series:

1. Part 1: Introduction to Linux Netkit interfaces — with a grain of eBPF (This post)

2. Part 2: Creating a Linux “Yogurt-phone” — with netkit and a grain of eBPF

If you are reading this, chances are you are already familiar with Linux’s veth interfaces. If not, you can think of it as a virtual Ethernet cable for Linux which is capable of crossing a network namespace (netns) boundary. In other words, it is one of the fundamental building blocks of containers like Docker, Podman and many others.