fix: updated the variable to use map instead of list

Author: pawan1210

examples/internal-lb-cloud-run/main.tf

@@ -95,8 +95,8 @@ module "backend-service-region-b" {
 }
 
 module "internal-lb-http-backend" {
-  source  = "terraform-google-modules/lb-http/google//modules/backend"
-  version = "~> 12.0"
+  source = "../../modules/backend"
+  #version = "~> 12.0"
 
   project_id            = var.project_id
   name                  = "int-lb-http-backend"
@@ -110,18 +110,22 @@ module "internal-lb-http-backend" {
 }
 
 module "internal-lb-http-frontend" {
-  source  = "terraform-google-modules/lb-http/google//modules/frontend"
-  version = "~> 12.0"
+  source = "../../modules/frontend"
+  #version = "~> 12.0"
 
   project_id            = var.project_id
   name                  = "int-lb-http-frontend"
   url_map_input         = module.internal-lb-http-backend.backend_service_info
   network               = google_compute_network.internal_lb_network.name
   load_balancing_scheme = "INTERNAL_MANAGED"
-  internal_forwarding_rule_subnetworks = [
-    google_compute_subnetwork.internal_lb_subnet_a.id,
-    google_compute_subnetwork.internal_lb_subnet_b.id
-  ]
+  internal_forwarding_rule_configs = {
+    "1" : {
+      "subnetwork" : google_compute_subnetwork.internal_lb_subnet_a.id
+    },
+    "2" : {
+      "subnetwork" : google_compute_subnetwork.internal_lb_subnet_b.id
+    }
+  }
   depends_on = [google_compute_subnetwork.internal_lb_proxy_only_a, google_compute_subnetwork.internal_lb_proxy_only_b]
 }
 

modules/frontend/main.tf

@@ -58,17 +58,18 @@ resource "google_compute_global_forwarding_rule" "http" {
 }
 
 resource "google_compute_global_forwarding_rule" "internal_managed_http" {
-  count = local.create_http_forward && local.is_internal_managed ? length(var.internal_forwarding_rule_subnetworks) : 0
+  for_each = local.create_http_forward && local.is_internal_managed ? var.internal_forwarding_rule_configs : {}
 
   provider              = google-beta
   project               = var.project_id
-  name                  = "${var.name}-internal-managed-http-${count.index}"
+  name                  = "${var.name}-internal-managed-http-${each.key}"
   target                = google_compute_target_http_proxy.default[0].self_link
   port_range            = var.http_port
   labels                = var.labels
   load_balancing_scheme = var.load_balancing_scheme
   network               = local.internal_network
-  subnetwork            = var.internal_forwarding_rule_subnetworks[count.index]
+  subnetwork            = each.value.subnetwork
+  ip_address            = each.value.address
 }
 
 resource "google_compute_global_forwarding_rule" "https" {
@@ -85,22 +86,23 @@ resource "google_compute_global_forwarding_rule" "https" {
 }
 
 resource "google_compute_global_forwarding_rule" "internal_managed_https" {
-  count = var.ssl && local.is_internal_managed ? length(var.internal_forwarding_rule_subnetworks) : 0
+  for_each = var.ssl && local.is_internal_managed ? var.internal_forwarding_rule_configs : {}
 
   provider              = google-beta
   project               = var.project_id
-  name                  = "${var.name}-internal-managed-https-${count.index}"
+  name                  = "${var.name}-internal-managed-https-${each.key}"
   target                = google_compute_target_https_proxy.default[0].self_link
   port_range            = var.https_port
   labels                = var.labels
   load_balancing_scheme = var.load_balancing_scheme
   network               = local.internal_network
-  subnetwork            = var.internal_forwarding_rule_subnetworks[count.index]
+  subnetwork            = each.value.subnetwork
+  ip_address            = each.value.address
 }
 
 resource "google_compute_global_address" "default" {
   provider   = google-beta
-  count      = local.is_internal_self_managed ? 0 : var.create_address ? 1 : 0
+  count      = local.is_internal_self_managed || local.is_internal_managed ? 0 : var.create_address ? 1 : 0
   project    = var.project_id
   name       = "${var.name}-address"
   ip_version = "IPV4"
@@ -123,17 +125,17 @@ resource "google_compute_global_forwarding_rule" "http_ipv6" {
 }
 
 resource "google_compute_global_forwarding_rule" "internal_managed_http_ipv6" {
-  count = var.enable_ipv6 && local.create_http_forward && local.is_internal_managed ? length(var.internal_forwarding_rule_subnetworks) : 0
+  for_each = var.enable_ipv6 && local.create_http_forward && local.is_internal_managed ? var.internal_forwarding_rule_configs : {}
 
   provider              = google-beta
   project               = var.project_id
-  name                  = "${var.name}-internal-managed-http-ipv6-${count.index}"
+  name                  = "${var.name}-internal-managed-http-ipv6-${each.key}"
   target                = google_compute_target_http_proxy.default[0].self_link
   port_range            = "80"
   labels                = var.labels
   load_balancing_scheme = var.load_balancing_scheme
-  network               = local.internal_network
-  subnetwork            = var.internal_forwarding_rule_subnetworks[count.index]
+  subnetwork            = each.value.subnetwork
+  ip_address            = each.value.address
 }
 
 resource "google_compute_global_forwarding_rule" "https_ipv6" {
@@ -150,22 +152,22 @@ resource "google_compute_global_forwarding_rule" "https_ipv6" {
 }
 
 resource "google_compute_global_forwarding_rule" "internal_managed_https_ipv6" {
-  count = var.enable_ipv6 && var.ssl && local.is_internal_managed ? length(var.internal_forwarding_rule_subnetworks) : 0
+  for_each = var.enable_ipv6 && var.ssl && local.is_internal_managed ? var.internal_forwarding_rule_configs : {}
 
   provider              = google-beta
   project               = var.project_id
-  name                  = "${var.name}-internal-managed-https-ipv6-${count.index}"
+  name                  = "${var.name}-internal-managed-https-ipv6-${each.key}"
   target                = google_compute_target_https_proxy.default[0].self_link
   port_range            = "443"
   labels                = var.labels
   load_balancing_scheme = var.load_balancing_scheme
-  network               = local.internal_network
-  subnetwork            = var.internal_forwarding_rule_subnetworks[count.index]
+  subnetwork            = each.value.subnetwork
+  ip_address            = each.value.address
 }
 
 resource "google_compute_global_address" "default_ipv6" {
   provider   = google-beta
-  count      = local.is_internal_self_managed ? 0 : (var.enable_ipv6 && var.create_ipv6_address) ? 1 : 0
+  count      = local.is_internal_self_managed || local.is_internal_managed ? 0 : (var.enable_ipv6 && var.create_ipv6_address) ? 1 : 0
   project    = var.project_id
   name       = "${var.name}-ipv6-address"
   ip_version = "IPV6"

modules/frontend/variables.tf

@@ -204,3 +204,12 @@ variable "internal_forwarding_rule_subnetworks" {
   type        = list(string)
   default     = []
 }
+
+variable "internal_forwarding_rule_configs" {
+  description = "Map of internal managed forwarding rule configs. One of 'address' or 'subnetwork' is required for each."
+  type = map(object({
+    address    = optional(string)
+    subnetwork = optional(string)
+  }))
+  default = {}
+}