Summary

In this chapter, we covered a lot of ground. Networking is such a vast topic and there are so many combinations of hardware, software, operating environments, and user skills that coming up with a comprehensive networking solution that is robust, secure, performs well, and is easy to maintain, is a very complicated endeavor. For Kubernetes clusters, the cloud providers mostly solve these issues. But if you run on-premise clusters or need a tailor-made solution, you get a lot of options to choose from. Kubernetes is a very flexible platform, designed for extension. Networking, in particular, is totally pluggable. The main topics we discussed were the Kubernetes networking model (flat address space where pods can reach others and shared localhost between all containers inside a pod), how lookup and discovery work, the Kubernetes network plugins, various networking solutions at different levels of abstraction (a lot of interesting variations), using network policies effectively to control...