Use TF-controller to detect drifts only without planning or applying

To detect drifts of your Terraform resources only, you can use the Terraform custom resource (CR) object in TF-controller and set the spec.approvePlan field to disable. This will tell the controller to skip the plan and apply stages, and only perform drift detection.

Here is an example of a Terraform CR object with spec.approvePlan set to disable:

apiVersion: infra.contrib.fluxcd.io/v1alpha1
kind: Terraform
metadata:
  name: hello-world
  namespace: flux-system
spec:
  approvePlan: disable
  interval: 1m
  path: ./
  sourceRef:
    kind: GitRepository
    name: helloworld
    namespace: flux-system