Declarative here means you’re describing the end state and letting the system decide how to transition from the current state. For instance, you can declare th

Declarative here means you’re describing the end state and letting the system decide how to transition from the current state. For instance, you can declare that you need two X (e.g. containers, disks, …) and pass that configuration to the framework. If the framework sees you currently have 1 X in production, it allocates another. If there are three, the framework kills one. And if there are 2, it’s a no-op. The beauty is that if you express what you need declaratively, you’re shielded from deciding the state transition.