This is great news. I'm looking forward to seeing what you come up with.
I'm not sure how relevant it is to you, but I hope you take some inspiration from https://platform.sh/ – it's the PaaS I've had the most luck with. While it isn't perfect, it's the closest thing I've found so far. Their "almost everything is in git" and instant environment cloning are fantastic features.
My understanding is that everything is cloned – included Redis and any search indexes. I've only tried with a database though, so that's the only thing I'm certain that works.
co-founder here, a bit late. Yes everything gets cloned. Databases, search-engines, message-queues, static files... you get precisely the same cluster in the same state.
I'm not sure how relevant it is to you, but I hope you take some inspiration from https://platform.sh/ – it's the PaaS I've had the most luck with. While it isn't perfect, it's the closest thing I've found so far. Their "almost everything is in git" and instant environment cloning are fantastic features.