Interestingly this is the problem we initially tried to solve. We build a Kubernetes Operator (back in the day in Kotlin) that does the full life cycle management of these kind of apps. Including management of CRs for database upgrades etc.
This project still runs at customers in production, but ultimately - as you pointed out - individual configurations became to big of a problem as it was not feasible to build a new operator versions for configuration deviations. It was a a fun project though: https://github.com/glasskube/operator
This project still runs at customers in production, but ultimately - as you pointed out - individual configurations became to big of a problem as it was not feasible to build a new operator versions for configuration deviations. It was a a fun project though: https://github.com/glasskube/operator