Plan fails with node_metadata set to GCE_METADATA or EXPOSE

[fcrespel]

TL;DR

The node_metadata variable cannot be set to GCE_METADATA or EXPOSE (legacy value) anymore due to a mistake in the backward compatibility mapping introduced in #1129:

terraform-google-kubernetes-engine/autogen/main/main.tf.tmpl

Line 129 in c3e08ea

old_node_metadata_config_mapping = { GKE_METADATA_SERVER = "GKE_METADATA", GCE_METADATA = "EXPOSE" }

The legacy EXPOSE value should be mapped to the new GCE_METADATA value, but here it's the opposite: the GCE_METADATA value is mapped to EXPOSE, which is no longer valid.

Expected behavior

Plan should apply with node_metadata set to GCE_METADATA or EXPOSE (legacy value).

Observed behavior

Plan fails with the following error in both cases:

expected node_pool.0.node_config.0.workload_metadata_config.0.mode to be one of [MODE_UNSPECIFIED GCE_METADATA GKE_METADATA], got EXPOSE

Terraform Configuration

module "gke" {
  source                   = "terraform-google-modules/kubernetes-engine/google"
  project_id               = var.project_id
  name                     = var.cluster_name
  region                   = var.region
  network                  = var.network
  subnetwork               = var.subnetwork
  ip_range_pods            = var.ip_range_pods
  ip_range_services        = var.ip_range_services
  kubernetes_version       = "1.23"
  node_metadata            = "GCE_METADATA" # This does not work
  remove_default_node_pool = true
  node_pools = [
    {
      name         = "node-pool-01"
      min_count    = 1
      max_count    = 3
      auto_upgrade = true
    }
  ]
}

Terraform Version

Terraform v1.3.7
on windows_amd64

Additional information

No response

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