terraform: Refresh null_resource when a variable changes

2 min read

When using local-exec with the null_resource we might need to be able to update the resources that gets created like this. Let's assume we have the following terraform code to apply Kustomize to a kubernetes cluster:

resource "null_resource" "metrics-server" {
  provisioner "local-exec" {
    command = "kubectl apply -k 'https://github.com/jordiprats/django-ampa/deploy-${var.version}/'"
  }
}

Given this setup even though the var.version changed, the resource won't be updated if it was already applied

08/03/2021