I've never used Kubernetes so I don't know what it provides. But I doubt it could provide the mechanisms for two application nodes to connect to each other and automatically share real-time state. Or the monitoring services to the underlying virtual machine's green threads.
Actually which of the above does Kubernetes really provide as it is in the Erlang VM?
Here is talk that elaborates it. It's obviously not 1-to-1, and there's other gotchas but there's convenient tables comparison linked directly.
...or just use kubernetes, to cover majority of those features.