[coffeesn0b]

Have you worked with k8s yet? A lot of the things you bring up are addressed if k8s is used properly.

[TickleSteve]

K8s has nothing to say about schedulability or real-time performance, its just not what it does. K8s is simply a way to coordinate containers, nothing to do with scheduling processes on this level.

Something like RTLinux however, would. (https://en.wikipedia.org/wiki/RTLinux)