infrastructure-provisioning/terraform/gcp/ssn-gke/main/modules/gke/vpc.tf

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locals {
  ssn_vpc_name      = "${var.service_base_name}-ssn-vpc"
  ssn_subnet_name   = "${var.service_base_name}-ssn-subnet"
}

resource "google_compute_network" "ssn_gke_vpc" {
  count                   = var.vpc_name == "" ? 1 : 0
  name                    = local.ssn_vpc_name
  auto_create_subnetworks = false
}

data "google_compute_network" "ssn_gke_vpc_data" {
  name = var.vpc_name == "" ? google_compute_network.ssn_gke_vpc.0.name : var.vpc_name
}

resource "google_compute_subnetwork" "ssn_gke_subnet" {
  count         = var.subnet_name == "" ? 1 : 0
  name          = local.ssn_subnet_name
  ip_cidr_range = var.subnet_cidr
  region        = var.region
  network       = data.google_compute_network.ssn_gke_vpc_data.self_link
}

data "google_compute_subnetwork" "ssn_gke_subnet_data" {
  name   = var.subnet_name == "" ? google_compute_subnetwork.ssn_gke_subnet.0.name : var.subnet_name
  region = var.region
}