A lot of this applies to containers in general. Not complaining, it's well written but wish they would break out the none kube container stuff into a general container-sec advice for people.
This is a great point. And containers don't even really exist in the first place, so really there should be (at least one of) a family of docs about securing the various namespaces, cgroups etc in modern Linux releases, and a doc about how to secure them in combination with each other.
