Defining a ClusterRoleBinding for Terraform service account - google-cloud-platform

Question

So I have a GCP service account that is Kubernetes Admin and Kubernetes Cluster Admin in the GCP cloud console.
I am now trying to give this terraform service account the ClusterRole role in GKE to manage all namespaces via following terraform configuration:
data "google_service_account" "terraform" {
project = var.project_id
account_id = var.terraform_sa_email
}
# Terraform needs to manage cluster
resource "google_project_iam_member" "terraform-gke-admin" {
project = var.project_id
role = "roles/container.admin"
member = "serviceAccount:${data.google_service_account.terraform.email}"
}
# Terraform needs to manage K8S RBAC
# https://cloud.google.com/kubernetes-engine/docs/how-to/role-based-access-control#iam-rolebinding-bootstrap
resource "kubernetes_cluster_role_binding" "terraform_clusteradmin" {
depends_on = [
google_project_iam_member.terraform-gke-admin,
]
metadata {
name = "cluster-admin-binding-terraform"
}
role_ref {
api_group = "rbac.authorization.k8s.io"
kind = "ClusterRole"
name = "cluster-admin"
}
subject {
api_group = "rbac.authorization.k8s.io"
kind = "User"
name = data.google_service_account.terraform.email
}
# must create a binding on unique ID of SA too
subject {
api_group = "rbac.authorization.k8s.io"
kind = "User"
name = data.google_service_account.terraform.unique_id
}
}
However, this always returns the following error:
Error: clusterrolebindings.rbac.authorization.k8s.io is forbidden: User "client" cannot create resource "clusterrolebindings" in API group "rbac.authorization.k8s.io" at the cluster scope
│
│ with module.kubernetes[0].kubernetes_cluster_role_binding.terraform_clusteradmin,
│ on kubernetes/terraform_role.tf line 15, in resource "kubernetes_cluster_role_binding" "terraform_clusteradmin":
│ 15: resource "kubernetes_cluster_role_binding" "terraform_clusteradmin" {
Any ideas what goes wrong here?
Could this be related to using Google Groups RBAC?
authenticator_groups_config {
security_group = "gke-security-groups#${var.acl_group_domain}"
}

Answer 1

data "google_client_config" "provider" {}
provider "kubernetes" {
cluster_ca_certificate = module.google.cluster_ca_certificate
host = module.google.cluster_endpoint
token = data.google_client_config.provider.access_token
}