Package leases implements logic for determining the state of shards based on their membership Lease object.

KeyForController returns a ring key for the controller of the given object.

KeyForObject returns a ring key for the given object itself.

KeyFuncForResource returns the key function that maps the given resource or its controller dependening on whether the resource is listed as a resource or controlled resource in the given ring.

Ring is the interface that is implemented by all ring objects that the sharder can handle.

KeyFunc maps objects to hash keys.