feat: support route table association

Author: oleh_mykolaishyn

main.tf

@@ -33,3 +33,10 @@ resource "azurerm_subnet_nat_gateway_association" "this" {
   subnet_id      = var.export_subnet_id == null ? azurerm_subnet.this[0].id : var.export_subnet_id
   nat_gateway_id = var.nat_gateway_id
 }
+
+resource "azurerm_subnet_route_table_association" "this" {
+  count = var.route_table_association_enabled ? 1 : 0
+
+  subnet_id      = var.export_subnet_id == null ? azurerm_subnet.this[0].id : var.export_subnet_id
+  route_table_id = var.route_table_id
+}

outputs.tf

@@ -23,6 +23,11 @@ output "nat_gateway_association_id" {
   description = "The ID of the NAT Gateway Association"
 }
 
+output "route_table_association_id" {
+  value       = try(azurerm_subnet_route_table_association.this[0].id, null)
+  description = "The ID of the Route Table Association"
+}
+
 output "name_to_id_map" {
   value       = var.export_subnet_id == null ? { (azurerm_subnet.this[0].name) = azurerm_subnet.this[0].id } : null
   description = "Map of Subnet Name to Id"

variables.tf

@@ -73,3 +73,15 @@ variable "nat_gateway_id" {
   description = "ID of the NAT Gateway which would be assigned to subnet"
   default     = null
 }
+
+variable "route_table_association_enabled" {
+  type        = bool
+  description = "Boolean flag that determines if Route Table association would be created"
+  default     = false
+}
+
+variable "route_table_id" {
+  type        = string
+  description = "ID of the Route Table which would be assigned to subnet"
+  default     = null
+}