I build a platform which hosts a few thousand services and tens of thousands of nodes. Currently, those services need to each internally manage replicating data

I build a platform which hosts a few thousand services and tens of thousands of nodes. Currently, those services need to each internally manage replicating data and need to be aware of failure domains (host, rack, data center). What I would like to do is develop a system where applications just need to request replicated volumes which span a specific failure domain and push that logic down to the platform.