be able to use different resource group for hub network

Author: yeoldegrove

azure/infrastructure.tf

@@ -78,6 +78,7 @@ module "network_hub" {
   deployment_name     = lower(local.deployment_name)
   az_region           = var.az_region
   resource_group_name = local.resource_group_name
+  resource_group_hub_name = var.resource_group_hub_name
   vnet_name           = var.vnet_hub_name
   vnet_address_range  = var.vnet_hub_address_range
   subnet_gateway_name = var.subnet_hub_gateway_name

azure/modules/network_spoke/infrastructure.tf

@@ -22,12 +22,13 @@ data "azurerm_subnet" "subnet-spoke-workload" {
 }
 
 locals {
-  vnet_hub_id           = format("/subscriptions/%s/resourceGroups/%s/providers/Microsoft.Network/virtualNetworks/%s", data.azurerm_subscription.current.subscription_id, var.resource_group_name, var.vnet_hub_name)
+  vnet_hub_id           = format("/subscriptions/%s/resourceGroups/%s/providers/Microsoft.Network/virtualNetworks/%s", data.azurerm_subscription.current.subscription_id, local.resource_group_hub_name, var.vnet_hub_name)
   vnet_name         = var.vnet_name == "" ? azurerm_virtual_network.vnet-spoke.0.name : var.vnet_name
   # subnet_mgmt_name         = var.subnet_mgmt_name == "" ? azurerm_subnet.subnet-spoke-mgmt.0.name : var.vnet_name
   # subnet_mgmt_id    = var.subnet_mgmt_name == "" ? azurerm_subnet.subnet-spoke-mgmt.0.id : format("/subscriptions/%s/resourceGroups/%s/providers/Microsoft.Network/virtualNetworks/%s/subnets/%s", data.azurerm_subscription.current.subscription_id, var.resource_group_name, var.vnet_name, var.subnet_mgmt_name)
   subnet_workload_name         = var.subnet_workload_name == "" ? azurerm_subnet.subnet-spoke-workload.0.name : var.vnet_name
   subnet_workload_id    = var.subnet_workload_name == "" ? azurerm_subnet.subnet-spoke-workload.0.id : format("/subscriptions/%s/resourceGroups/%s/providers/Microsoft.Network/virtualNetworks/%s/subnets/%s", data.azurerm_subscription.current.subscription_id, var.resource_group_name, var.vnet_name, var.subnet_workload_name)
+  resource_group_hub_name = var.resource_group_hub_name == "" ? var.resource_group_name : var.resource_group_hub_name
 }
 
 # Network resources: Virtual Network, Subnet

azure/modules/network_spoke/variables.tf

@@ -19,6 +19,11 @@ variable "resource_group_name" {
   type        = string
 }
 
+variable "resource_group_hub_name" {
+  description = "Already existing resource group where the Hub infrastructure was created. If it's not set the resource_group_name is used instead."
+  type        = string
+}
+
 variable "vnet_hub_name" {
   description = "Already existing virtual network name used by the created infrastructure. If it's not set a new one will be created named vnet-{{var.deployment_name/terraform.workspace}}"
   type        = string

azure/variables.tf

@@ -12,6 +12,12 @@ variable "resource_group_name" {
   default     = ""
 }
 
+variable "resource_group_hub_name" {
+  description = "Already existing resource group where the Hub infrastructure was created. If it's not set the resource_group_name is used instead."
+  type        = string
+  default     = ""
+}
+
 variable "vnet_name" {
   description = "Already existing virtual network name used by the created infrastructure. If it's not set a new one will be created named vnet-{{var.deployment_name/terraform.workspace}}"
   type        = string