CNI
Container Network Interface - networking for Linux containers
...Because of this focus, CNI has a wide range of support and the specification is simple to implement. As well as the specification, the CNI repository contains the Go source code of a library for integrating CNI into applications and an example command-line tool for executing CNI plugins. A separate repository contains reference plugins and a template for making new plugins. The template code makes it straight-forward to create a CNI plugin for an existing container networking project. CNI also makes a good framework for creating a new container networking project from scratch.