EvictionRequest

        EvictionRequest defines a request that should ideally result in a graceful eviction of a .spec.target (e.g. termination of a pod).

The evictionrequest-controller observes intents of all EvictionRequests and transforms them into Evictions.
  - .spec.requester is set as a label on the Eviction for easier lookup.
  - Each target can have a set of responders assigned to it. Eviction objects are observed by
    these responders, who implement the eviction logic and update the Eviction's status with
    progress.

There is many-to-many relationship between EvictionRequests and Evictions in general. And many-to-one if the target is a  pod.

If all requesters withdraw their eviction intent for a common target, the eviction will be canceled. Deleting an EvictionRequest also counts as a withdrawal. Once all EvictionRequest of a target are removed, the corresponding Evictions are eventually garbage collected.