what I call the broker or abstraction layer. This is where you have some kind of intelligence that actually forms the interface with your user. Your user makes a request of the broker layer, and then the broker works out which of the many cloud providers that it supports it should dispatch the request to
— Kris Saxton, David Rogers · Hybrid-Clouds: How to Go Slow and Haemorrhage Money Doing It, London 2017 · at 4:43