Make optional the deployment of "example' resources adding up to the cost and complexity

[mromascanu123]

TL;DR

For each VPC in the spokes can see a servicenetworking peering associated with an instance of private-service-access

in 3-networks-hub-and-spoke/modules/restricted_shared_vpc/main.tf
...
resource "google_service_networking_connection" "private_vpc_connection" {
count = var.private_service_cidr != null ? 1 : 0
network = module.main.network_self_link
service = "servicenetworking.googleapis.com"
reserved_peering_ranges =
[google_compute_global_address.private_service_access_address[0].name]
depends_on = [module.peering]
}

Can see the peerings were provisioned in the spoke VPC but the controlling variable var.private_service_cidr has a null default and is not set anywhere

e.g. in vpc-d-shared-base-spoke in prj-d-shared-base

What's the purpose of enabling private-service-access (purportedly for accessing services like CloudSQL) if there seem to be no way to enable the resource? And then why the peering is nontheless provisioned and the project behind it?

| Peering Name | Peered VPC | Peered project
| servicenetworking-googleapis-com | servicenetworking | vd8485225771cd5c4p-tp

Also the "proxy" subnets one of it in each region for each spoke VPC
In the code comments they are marked as "example" but - what's the practical use and why provisioning them is not optional?
Not to mention that the CIDRs of these proxy subnets are hardcoded e.g.
3-networks-hub-and-spoke/envs/non-production/main.tf
...
locals {
env = "non-production"
...
base_subnet_proxy_ranges = {
(local.default_region1) = "10.18.4.0/23"
(local.default_region2) = "10.19.4.0/23"
}
...

Expected behavior

There should not have been any peering and service-access provisioned (this might add up to the cost)

"Example" resources should not be created unless serving a practical purpose in the landing zone. And there should be no hardcoding.

Observed behavior

A peering and a project behind are provisioned although there is no need for CloudSQL at this stage
| Peering Name | Peered VPC | Peered project
| servicenetworking-googleapis-com | servicenetworking | vd8485225771cd5c4p-tp

Terraform Configuration

Terraform v1.6.0
on linux_amd64

Terraform Version

Terraform v1.6.0
on linux_amd64

Additional information

No response

[fmichaelobrien]

stale bot timer restart - https://github.com/terraform-google-modules/terraform-example-foundation/blob/master/.github/workflows/stale.yml#L21

[sleighton2022]

This is an example deployment, this is not a module. You have the option of removing code as desired once you fork the repository. I will be closing this issue.