add example for vnet peering in different subscription

README.yaml

@@ -38,16 +38,10 @@ usage: |-
   module "vnet_peering" {
    source                        = "clouddrove/vnet-peering/azure"
    version                       = "1.0.0"
-   depends_on                    = [module.resource_group_1, module.resource_group_2]
    enabled_peering               = true
    resource_group_1_name         = module.resource_group_1.resource_group_name
    resource_group_2_name         = module.resource_group_2.resource_group_name
-   allow_gateway_transit_vnet1   = false
-   use_remote_gateways_vnet1     = false
-   allow_gateway_transit_vnet2   = false
-   use_remote_gateways_vnet2     = false
-   allow_forwarded_traffic_vnet1 = false
-   allow_forwarded_traffic_vnet2 = false
+
    different_rg                  = true
    vnet_1_name                   = module.vnet.vnet_name[0]
    vnet_1_id                     = module.vnet.vnet_id[0]
@@ -56,3 +50,20 @@ usage: |-
   }
    ```
 
+    ### vnet-peering in different subscription
+  ```hcl
+  module "vnet_peering" {
+   source                        = "clouddrove/vnet-peering/azure"
+   version                       = "1.0.0"
+   enabled_diff_subs_peering     = true
+   resource_group_1_name         = module.resource_group_1.resource_group_name
+   diff_subs_resource_group_name = data.azurerm_resource_group.mgmt-rg.name
+
+   alias_subs_id                 = "82XXXXXXXXXXXXXXXXXXXXa80"
+   vnet_1_name                   = module.vnet.vnet_name[0]
+   vnet_1_id                     = module.vnet.vnet_id[0]
+   vnet_diff_subs_name           = data.azurerm_virtual_network.mgmt-staging-vnet.name
+   vnet_diff_subs_id             = data.azurerm_virtual_network.mgmt-staging-vnet.id
+  }
+   ```
+

_example/peering_in_diff_subscription/example.tf

@@ -0,0 +1,64 @@
+provider "azurerm" {
+  features {}
+}
+
+module "resource_group_1" {
+  source  = "clouddrove/resource-group/azure"
+  version = "1.0.1"
+
+  name        = "vnet"
+  environment = "test"
+  label_order = ["name", "environment"]
+  location    = "North Europe"
+}
+
+
+#Vnet
+module "vnet" {
+  source  = "clouddrove/vnet/azure"
+  version = "1.0.0"
+
+  name        = "app"
+  environment = "example"
+  label_order = ["name", "environment"]
+
+  resource_group_name = module.resource_group_1.resource_group_name
+  location            = module.resource_group_1.resource_group_location
+  address_space       = "10.0.0.0/24"
+  enable_ddos_pp      = false
+}
+
+
+provider "azurerm" {
+  alias = "mgmt"
+  features {}
+  subscription_id = "8XXXXXXXXXXXXXXXX53b2a80"
+}
+
+data "azurerm_resource_group" "mgmt-rg" {
+  provider = azurerm.mgmt
+  name     = "example-rg"
+}
+
+data "azurerm_virtual_network" "mgmt-staging-vnet" {
+  provider            = azurerm.mgmt
+  name                = "example-vnet"
+  resource_group_name = data.azurerm_resource_group.mgmt-rg.name
+}
+
+module "vnet_peering" {
+  source = "../.."
+
+  enabled_diff_subs_peering     = true
+  resource_group_1_name         = module.resource_group_1.resource_group_name
+  diff_subs_resource_group_name = data.azurerm_resource_group.mgmt-rg.name
+
+  alias_subs_id       = "82XXXXXXXXXXXXXXXXXXXXa80"
+  vnet_1_name         = module.vnet.vnet_name[0]
+  vnet_1_id           = module.vnet.vnet_id[0]
+  vnet_diff_subs_name = data.azurerm_virtual_network.mgmt-staging-vnet.name
+  vnet_diff_subs_id   = data.azurerm_virtual_network.mgmt-staging-vnet.id
+
+}
+
+

_example/peering_in_diff_subscription/output.tf

@@ -0,0 +1,19 @@
+output "vnet_peer_1_id" {
+  value       = module.vnet_peering.*.vnet_peer_1_id
+  description = "The id of the newly created virtual network peering in on first virtual netowork."
+}
+
+output "vnet_peer_1_name" {
+  value       = module.vnet_peering.*.vnet_peer_1_name
+  description = "The name of the newly created virtual network peering in on first virtual netowork."
+}
+
+output "vnet_peer_diff_subs_id" {
+  value       = module.vnet_peering.*.vnet_peer_diff_subs_id
+  description = "The id of the newly created virtual network peering in on different subscription virtual network."
+}
+
+output "vnet_peer_diff_subs_name" {
+  value       = module.vnet_peering.*.vnet_peer_diff_subs_name
+  description = "The name of the newly created virtual network peering in on different subscription virtual network."
+}

_example/example.tf → _example/peering_in_same_subscription/example.tf

@@ -55,23 +55,16 @@ module "vnet_remote" {
 }
 
 module "vnet_peering" {
-  source     = "../"
-  depends_on = [module.resource_group_1, module.resource_group_2]
+  source = "../.."
 
   enabled_peering       = true
   resource_group_1_name = module.resource_group_1.resource_group_name
   resource_group_2_name = module.resource_group_2.resource_group_name
 
-  allow_gateway_transit_vnet1   = false
-  use_remote_gateways_vnet1     = false
-  allow_gateway_transit_vnet2   = false
-  use_remote_gateways_vnet2     = false
-  allow_forwarded_traffic_vnet1 = false
-  allow_forwarded_traffic_vnet2 = false
-  different_rg                  = true
-  vnet_1_name                   = module.vnet.vnet_name[0]
-  vnet_1_id                     = module.vnet.vnet_id[0]
-  vnet_2_name                   = module.vnet_remote.vnet_name[0]
-  vnet_2_id                     = module.vnet_remote.vnet_id[0]
+  different_rg = true
+  vnet_1_name  = module.vnet.vnet_name[0]
+  vnet_1_id    = module.vnet.vnet_id[0]
+  vnet_2_name  = module.vnet_remote.vnet_name[0]
+  vnet_2_id    = module.vnet_remote.vnet_id[0]
 
 }

_example/peering_in_same_subscription/versions.tf

@@ -0,0 +1,13 @@
+# Terraform version
+terraform {
+  required_version = ">= 1.0.0"
+}
+
+terraform {
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = ">=2.90.0"
+    }
+  }
+}

main.tf

@@ -1,11 +1,11 @@
 
 # enable global peering between the two virtual network
 resource "azurerm_virtual_network_peering" "peering" {
-  count                        = var.enabled_peering ? 1 : 0
-  name                         = format("%s-peering-%s", var.vnet_1_name, var.vnet_2_name)
+  count                        = var.enabled_peering || var.enabled_diff_subs_peering ? 1 : 0
+  name                         = var.enabled_diff_subs_peering == false ? format("%s-peering-%s", var.vnet_1_name, var.vnet_2_name) : format("%s-peering-%s", var.vnet_1_name, var.vnet_diff_subs_name)
   resource_group_name          = var.resource_group_1_name
   virtual_network_name         = var.vnet_1_name
-  remote_virtual_network_id    = var.vnet_2_id
+  remote_virtual_network_id    = var.enabled_diff_subs_peering == false ? var.vnet_2_id : var.vnet_diff_subs_id
   allow_virtual_network_access = var.allow_virtual_network_access
   allow_forwarded_traffic      = var.allow_forwarded_traffic_vnet1
   allow_gateway_transit        = var.allow_gateway_transit_vnet1
@@ -25,3 +25,23 @@ resource "azurerm_virtual_network_peering" "peering_back" {
   allow_gateway_transit        = var.allow_gateway_transit_vnet2
   use_remote_gateways          = var.use_remote_gateways_vnet2
 }
+
+provider "azurerm" {
+  alias = "peer"
+  features {}
+  subscription_id = var.alias_subs_id
+}
+
+# enable global peering between the two virtual network
+resource "azurerm_virtual_network_peering" "peering_back_diff_subs" {
+  provider                     = azurerm.peer
+  count                        = var.enabled_diff_subs_peering ? 1 : 0
+  name                         = format("%s-peering-%s", var.vnet_diff_subs_name, var.vnet_1_name)
+  resource_group_name          = var.diff_subs_resource_group_name
+  virtual_network_name         = var.vnet_diff_subs_name
+  remote_virtual_network_id    = var.vnet_1_id
+  allow_virtual_network_access = var.allow_virtual_network_access
+  allow_forwarded_traffic      = var.allow_forwarded_traffic_vnet_diff_subs
+  allow_gateway_transit        = var.allow_gateway_transit_vnet_diff_subs
+  use_remote_gateways          = var.use_remote_gateways_vnet_diff_subs
+}

output.tf

@@ -17,3 +17,13 @@ output "vnet_peer_2_name" {
   value       = azurerm_virtual_network_peering.peering_back.*.name
   description = "The name of the newly created virtual network peering in on second virtual netowork."
 }
+
+output "vnet_peer_diff_subs_name" {
+  value       = azurerm_virtual_network_peering.peering_back_diff_subs.*.name
+  description = "The name of the newly created virtual network peering in on different subscription virtual netowork."
+}
+
+output "vnet_peer_diff_subs_id" {
+  value       = azurerm_virtual_network_peering.peering_back_diff_subs.*.id
+  description = "The id of the newly created virtual network peering in on different subscription virtual netowork."
+}

variables.tf

@@ -78,6 +78,11 @@ variable "allow_forwarded_traffic_vnet2" {
   default     = false
   description = "Controls if forwarded traffic from VMs in the remote virtual network is allowed"
 }
+variable "allow_forwarded_traffic_vnet_diff_subs" {
+  type        = bool
+  default     = false
+  description = "Controls if forwarded traffic from VMs in the remote virtual network is allowed"
+}
 
 variable "allow_gateway_transit_vnet1" {
   type        = bool
@@ -90,6 +95,11 @@ variable "allow_gateway_transit_vnet2" {
   default     = false
   description = "Controls gatewayLinks can be used in the remote virtual network’s link to the local virtual network."
 }
+variable "allow_gateway_transit_vnet_diff_subs" {
+  type        = bool
+  default     = false
+  description = "Controls gatewayLinks can be used in the different subscription virtual network’s link to the local virtual network."
+}
 
 variable "use_remote_gateways_vnet1" {
   type        = bool
@@ -103,6 +113,12 @@ variable "use_remote_gateways_vnet2" {
   description = "Controls if remote gateways can be used on the local virtual network"
 }
 
+variable "use_remote_gateways_vnet_diff_subs" {
+  type        = bool
+  default     = false
+  description = "Controls if remote gateways can be used on the different subscription virtual network"
+}
+
 variable "resource_group_1_name" {
   type        = string
   default     = ""
@@ -118,5 +134,31 @@ variable "resource_group_2_name" {
 variable "different_rg" {
   type        = bool
   default     = false
-  description = "Flag to tell whether peering is to be done in same in resource group or deifferent resource group "
+  description = "Flag to tell whether peering is to be done in same in resource group or different resource group "
+}
+
+variable "enabled_diff_subs_peering" {
+  type    = bool
+  default = false
+}
+variable "vnet_diff_subs_name" {
+  type        = string
+  default     = ""
+  description = "The name of the remote virtual network."
+}
+variable "alias_subs_id" {
+  type        = string
+  default     = ""
+  description = "Alias for remote provider in module."
+}
+variable "diff_subs_resource_group_name" {
+  type        = string
+  default     = ""
+  description = "The name of remote resource group to be imported."
+}
+
+variable "vnet_diff_subs_id" {
+  type        = string
+  default     = ""
+  description = "The id of the remote virtual network."
 }