The answer here depends on what you want to accomplish. Since ideally there's no local authentication to CoreOS (because the clusters may be supporting apps that have newer authentication/authorization frameworks), therere's no need for Centrify software.
All supported platforms are here: https://www.centrify.com/products/server-suite/system-catalog/ (commercial version, not Express, if not listed, not supported or tested - keep in mind that CoreOS doesn't even have a PAM facility.)
We welcome (in the Idea Exchange) to understand any requirements around CoreOS, Docker, kubernetes, etc. to see how current (and future) Centrify software or services can help.
Internally there's some work being with some of the technologies you mentioned in your post as well.
R.P