The article contains a complete misrepresentation of the origins of Kubernetes:

> It started as an open source release of Google’s Borg: the internal platform that managed their vast infrastructure.

Borg has never been open-sourced. Kubernetes was a greenfield project, and there's no Borg code in it whatsoever.

Kubernetes is probably more influenced by Google's Omega project, an attempt at "Borg 2.0" which ended up having its ideas merged into Borg instead. For example, Kubernetes' persistent store is inspired by Omega.