Kubernetes in Action

Appendix C. Using other container runtimes

C.1. Replacing Docker with rkt

We’ve mentioned rkt (pronounced rock-it) a few times in this book. Like Docker, it runs applications in isolated containers, using the same Linux technologies as those used by Docker. Let’s look at how rkt differs from Docker and how to try it in Minikube.

The first great thing about rkt is that it directly supports the notion of a Pod (running multiple related containers), unlike Docker, which only runs individual containers. Rkt is based on open standards and was built with security in mind from the start (for example, images are signed, so you can be sure they haven’t been tampered with). Unlike Docker, which initially had a client-server based architecture that didn’t ...