I once heard that Hypervisors are the living proof of Operating System's incompetence. And if we think about it, OSes should be able to run services alongide with each other peacefully. Isolation should be granted, and excessive resource usage shouldn't be an issue. But because Linux was never able to provide such isolation, people started to span more physical servers to isolate services, and when that started to mean idle capacity, hypervisors kicked in.
I will talk about a sound alternative, Containers, a (being) built-in feature of the Linux Kernel that aims at fixing this by allowing users to create independent services or full-userspaces running ontop of the same Linux Kernel in a constrained way. I will discuss the relevant technologies and the changes needed in the Kernel. Basic knowledge of the main kernel components will help you profit from this talk, but is not mandatory.