add multi-network gateway

Author: DaMandal0rian

resources/terraform/auto-drive/main.tf

@@ -209,3 +209,43 @@ module "ec2_gateway" {
   )
   tags = merge(local.tags, { Role = "gateway" })
 }
+
+################################################################################
+# Multi-Network Gateway Instances
+################################################################################
+
+module "ec2_multi_gateway" {
+  source                      = "../../../templates/terraform/aws/ec2"
+  name                        = "${local.name}-multi-network-gateway"
+  count                       = var.multi_network_gateway_instance_count
+  ami                         = data.aws_ami.ubuntu_amd64.id
+  instance_type               = var.multi_network_gateway_instance_type
+  availability_zone           = element(module.vpc.azs, 0)
+  subnet_id                   = element(module.vpc.public_subnets, 0)
+  vpc_security_group_ids      = [aws_security_group.auto_drive_sg.id]
+  associate_public_ip_address = false # Gateway instances use EIPs
+  create_eip                  = true
+  disable_api_stop            = false
+
+  create_iam_instance_profile = true
+  ignore_ami_changes          = true
+  iam_role_description        = "IAM role for EC2 instance"
+  iam_role_policies = {
+    AdministratorAccess = "arn:aws:iam::aws:policy/AdministratorAccess"
+  }
+
+  root_block_device = [
+    {
+      device_name = "/dev/sdf"
+      encrypted   = true
+      volume_type = "gp3"
+      throughput  = 250
+      volume_size = var.gateway_root_volume_size
+    }
+  ]
+  volume_tags = merge(
+    { "Name" = "${local.name}-multi-network-gateway-root-volume-${count.index}" },
+    var.tags
+  )
+  tags = merge(local.tags, { Role = "multi-network-gateway" })
+}

resources/terraform/auto-drive/variables.tf

@@ -48,6 +48,13 @@ variable "gateway_instance_type" {
   default     = "m7a.2xlarge"
 }
 
+# Gateway Instance Configuration
+variable "multi_network_gateway_instance_type" {
+  description = "Instance type for gateway instances."
+  type        = string
+  default     = "t3.medium"
+}
+
 variable "gateway_root_volume_size" {
   description = "Size of the root volume (in GB) for gateway instances."
   type        = number
@@ -79,6 +86,12 @@ variable "gateway_instance_count" {
   default     = 1
 }
 
+variable "multi_network_gateway_instance_count" {
+  description = "Number of multi-network gateway instances to create."
+  type        = number
+  default     = 1
+}
+
 variable "ingress_cidr_blocks" {
   description = "List of CIDR blocks for ingress"
   type        = list(string)

templates/terraform/aws/ec2/main.tf

@@ -197,6 +197,7 @@ resource "aws_instance" "this" {
       private_ip,
       associate_public_ip_address,
       vpc_security_group_ids,
+      instance_type,
     ]
   }
 }
@@ -384,6 +385,7 @@ resource "aws_instance" "ignore_ami" {
       private_ip,
       associate_public_ip_address,
       vpc_security_group_ids,
+      instance_type,
     ]
   }
 }