Fix: Can't create zonal beta-private cluster is region not set.

[swbsf]

Hello,

Creating a zonal cluster will fail with a

Error: Invalid template interpolation value

  on .terraform/modules/gke_private/modules/beta-private-cluster/cluster.tf line 52, in resource "google_container_cluster" "primary":
  52:   subnetwork = "projects/${local.network_project_id}/regions/${var.region}/subnetworks/${var.subnetwork}"
    |----------------
    | var.region is null

The expression result is null. Cannot include a null value in a string
template.

The bug seems here

terraform-google-kubernetes-engine/modules/beta-private-cluster/cluster.tf

Line 52 in bf4d0da

subnetwork = "projects/${local.network_project_id}/regions/${var.region}/subnetworks/${var.subnetwork}"

Which should reference local.region instead of var.region if I'm correct?

[comment-bot-dev]

Thanks for the PR! 🚀
✅ Lint checks have passed.

[morgante]

Changes need to be made in autogen/.

[swbsf]

Changes need to be made in autogen/.

Ok done, anything else?

[morgante]

@swbsf You need to run make build.