Use TF-controller with a plan-only mode

This plan-only mode is designed to be used in conjunction with the Branch Planner. But you can also use it in a circumstance where you want to run terraform plan only.

If planOnly is set to true, the controller will skip the apply part and runs only terraform plan and saves the output.

apiVersion: infra.contrib.fluxcd.io/v1
kind: Terraform
metadata:
  name: helloworld
  namespace: flux-system
spec:
  interval: 1m
  planOnly: true
  path: ./
  sourceRef:
    kind: GitRepository
    name: helloworld
    namespace: flux-system