Kubernetes Configuration Management - bobbae/gcp GitHub Wiki
There are many tools for Kubernetes Configuration Management. In general, there are many Configuration Management tools of all kinds. A lot of work is devoted to this area.
https://blog.argoproj.io/the-state-of-kubernetes-configuration-management-d8b06c1205
Helm
Kustomize
Jsonnet
Ksonnet
Ship
https://github.com/replicatedhq/ship