The Kubernetes provider appears to fallback to localhost cluster

[apeabody]

TL;DR

When using the asm submodule without a provider "kubernetes" {} it appears to silently fallback to localhost.

Expected behavior

Either require variables or clear failure reason

Observed behavior

The provider attempts to create a cluster namespace on localhost.

Terraform Configuration

module "asm" {
  source            = "terraform-google-modules/kubernetes-engine/google//modules/asm"
  project_id        = var.project_id
  cluster_name      = module.gke.name
  cluster_location  = module.gke.location
}

Terraform Version

Terraform v1.1.7

Additional information

#1205

[bharathkkb]

As discussed offline lets start by adding an example provider config to the usage section https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/tree/master/modules/asm#usage. Here is another example not related to asm but similar #1203

[apeabody]

Closing as we updated the sub-module user documentation and also reported to the upstream provider.