feat: allow configuring IPv6 (#5)

Author: thomaseizinger

main.tf

@@ -23,9 +23,20 @@ resource "azurerm_orchestrated_virtual_machine_scale_set" "firezone" {
     network_security_group_id = var.network_security_group_id
 
     ip_configuration {
-      name      = "internal"
+      name      = "internal-ipv4"
       primary   = true
       subnet_id = var.private_subnet
+      version   = "IPv4"
+    }
+
+    dynamic "ip_configuration" {
+      for_each = var.private_subnet_ipv6 != null ? [1] : []
+      content {
+        name      = "internal-ipv6"
+        primary   = false
+        subnet_id = var.private_subnet_ipv6
+        version   = "IPv6"
+      }
     }
   }
 

variables.tf

@@ -73,10 +73,16 @@ variable "firezone_api_url" {
 }
 
 variable "private_subnet" {
-  description = "The private subnet ID"
+  description = "The private IPv4 subnet ID"
   type        = string
 }
 
+variable "private_subnet_ipv6" {
+  description = "The private IPv6 subnet ID"
+  type        = string
+  default     = null
+}
+
 variable "network_security_group_id" {
   description = "The network security group id to attach to the instances"
   type        = string