Container Networking From Scratch - Kristen Jacobs, Oracle

Kristen Jacobs explains how to build an overlay network from scratch using Linux bridges, veth pairs, and routing tables.

Join us for Kubernetes Forums Seoul, Sydney, Bengaluru and Delhi - learn more at kubecon.io Don't miss KubeCon + CloudNativeCon 2020 events in Amsterdam March 30 - April 2, Shanghai July 28-30 and Boston November 17-20! Learn more at kubecon.io. The conference features presentations from developers and end users of Kubernetes, Prometheus, Envoy, and all of the other CNCF-hosted projects Container Networking From Scratch - Kristen Jacobs, Oracle Learn how to construct an overlay network across multiple hosts in just a few lines of bash! Containers in a system such as Kubernetes need to be able to communicate, and a common networking solution is to use an overlay network, for example, Flannel. In this talk we aim to 'demystify' container networking, and it's constituent elements such as Linux bridges, veth pairs, routing routes and TUN/TAP devices. Starting with defining a simple network namespace, we will work through networking between containers on the same machine (using the default docker model), up toward a full overlay network spanning multiple machines (as in Kubernetes). We will explain both how this works and why/when it is required, providing the necessary background for understanding and evaluating common existing Kubernetes networking solutions such as Flannel and Calico. To learn more: sched.co/GrWx