There is some development on that front too. For postgres, check out CrunchyData's postgres operator (https://access.crunchydata.com/documentation/postgres-operat...) where with a single config file you get a HA database with read replica(s), connection pooling via pgbouncer and multiple backup targets via pgbackrest with cloning and point-in-time recovery
I personally like the Zalando operator better, you can add databases and users by updating the CRD, feature parity between the two on HA is pretty good
