terraform-provider-flux VS k2tf

IMO, a better approach would be to provision your cluster using terraform, then do cluster operations using a GitOps tool, such as GitOps Toolkit (Flux v2) - https://toolkit.fluxcd.io/. You can point multiple clusters to the same repo and they are going to apply and reconcile the desired state for all or your clusters if needed. There’s also a Flux terraform provider - https://github.com/fluxcd/terraform-provider-flux, bootstrap flux then let it do its job.

You could try this: https://github.com/fluxcd/terraform-provider-flux

This might be what you are looking for: https://github.com/sl1pm4t/k2tf

... and if you're an opinionated person, like me, and you value consolidated infrastructure atomicity as a whole along side locks for everything. You'd port cherry-picked helm charts as terraform modules with k2tf, and build every docker container from scratch, with forced layer invalidation to perform security updates for every image, using the docker and kubernetes providers respectively.

Pro tip: If you want to convert k8s yaml files to .tf, you can use k2tf (repo) that is able to convert the resource types of the yaml top their appropriated counterparts of the k8s provider for terraform. To install it, just:

Almost all is created as manifest/helm in K8S world, too much toil to convert (tool like https://github.com/sl1pm4t/k2tf help but exists corners cases)