Docker achieved a number of things: they provided a simple user experience and a simple, relatively effective image format. The primitives had been in the kerne

Docker achieved a number of things: they provided a simple user experience and a simple, relatively effective image format. The primitives had been in the kernel for some time and were widely used to implement a variety of systems (Cloud Foundry used these kernel features over 2 generations of its own code before switching to runc). If you're just running stuff on a single machine for your own satisfaction, you don't need to fret about Kubernetes. Disclosure: I work for Pivotal, so I've been up close with some of this stuff for a bit.