Added most LZ components without domains.

.gitignore

@@ -2,3 +2,5 @@
 .terraform*
 *.tfstate
 *.tfstate.backup
+*.tfplan
+*.tfplan.*

main.tf

@@ -14,15 +14,153 @@ provider "google" {
   zone    = "europe-central2-b"
 }
 
-data "google_project" "project" {
+# Networks
-  project_id = "network-getting-started"
+resource "google_compute_network" "vpc_hub" {
+  name                    = "dom-lab-hub"
+  auto_create_subnetworks = false
 }
 
-resource "google_compute_instance" "vm_1" {
+resource "google_compute_subnetwork" "net_hub" {
-  name         = "tftest-vm"
+  name          = "hub"
+  region        = "europe-central2"
+  ip_cidr_range = var.hub_cidr
+  network       = google_compute_network.vpc_hub.id
+}
+
+resource "google_compute_network" "vpc_spoke" {
+  name                    = "dom-lab-spoke"
+  auto_create_subnetworks = false
+}
+
+resource "google_compute_subnetwork" "net_spoke" {
+  name          = "spoke"
+  region        = "europe-central2"
+  ip_cidr_range = var.spoke_cidr
+  network       = google_compute_network.vpc_spoke.id
+}
+
+# Peering
+resource "google_compute_network_peering" "hub_to_spoke" {
+  name         = "hub-to-spoke"
+  network      = google_compute_network.vpc_hub.id
+  peer_network = google_compute_network.vpc_spoke.id
+
+  export_custom_routes = true
+  import_custom_routes = false
+}
+
+resource "google_compute_network_peering" "spoke_to_hub" {
+  name         = "spoke-to-hub"
+  network      = google_compute_network.vpc_spoke.id
+  peer_network = google_compute_network.vpc_hub.id
+
+  export_custom_routes = false
+  import_custom_routes = true
+}
+
+# Cloud NAT
+resource "google_compute_router" "hub_cloud_router" {
+  name    = "hub-cr"
+  network = google_compute_network.vpc_hub.id
+  region  = "europe-central2"
+}
+
+resource "google_compute_router_nat" "hub_nat" {
+  name                               = "hub-nat"
+  region                             = "europe-central2"
+  router                             = google_compute_router.hub_cloud_router.name
+  nat_ip_allocate_option             = "AUTO_ONLY"
+  source_subnetwork_ip_ranges_to_nat = "ALL_SUBNETWORKS_ALL_IP_RANGES"
+}
+
+resource "google_compute_router" "spoke_cloud_router" {
+  name    = "spoke-cr"
+  network = google_compute_network.vpc_spoke.id
+  region  = "europe-central2"
+}
+
+resource "google_compute_router_nat" "spoke_nat" {
+  name                               = "spoke-nat"
+  region                             = "europe-central2"
+  router                             = google_compute_router.spoke_cloud_router.name
+  nat_ip_allocate_option             = "AUTO_ONLY"
+  source_subnetwork_ip_ranges_to_nat = "ALL_SUBNETWORKS_ALL_IP_RANGES"
+}
+
+# Cloud VPN
+resource "google_compute_vpn_gateway" "gw" {
+  name    = "vpn-1"
+  network = google_compute_network.vpc_hub.id
+}
+
+resource "google_compute_address" "gw_ip" {
+  name         = "vpn-1-ip"
+  address_type = "EXTERNAL"
+}
+
+output "vpn_gw_ip" {
+  value = google_compute_address.gw_ip.address
+}
+
+resource "google_compute_forwarding_rule" "gw_fw_esp" {
+  name        = "fwd-esp"
+  ip_protocol = "ESP"
+  ip_address  = google_compute_address.gw_ip.address
+  target      = google_compute_vpn_gateway.gw.id
+}
+
+resource "google_compute_forwarding_rule" "gw_fw_udp_500" {
+  name        = "fwd-udp-500"
+  ip_protocol = "UDP"
+  ip_address  = google_compute_address.gw_ip.address
+  port_range  = "500"
+  target      = google_compute_vpn_gateway.gw.id
+}
+
+resource "google_compute_forwarding_rule" "gw_fw_udp_4500" {
+  name        = "fwd-udp-4500"
+  ip_protocol = "UDP"
+  ip_address  = google_compute_address.gw_ip.address
+  port_range  = "4500"
+  target      = google_compute_vpn_gateway.gw.id
+}
+
+resource "google_compute_vpn_tunnel" "to_lazurowa" {
+  name               = "to-lazurowa"
+  target_vpn_gateway = google_compute_vpn_gateway.gw.id
+
+  shared_secret = var.shared_secret
+  peer_ip       = var.peer_ip
+  ike_version   = 2
+
+  local_traffic_selector = [
+    var.hub_cidr,
+    var.spoke_cidr,
+    "35.199.192.0/19"
+  ]
+
+  remote_traffic_selector = var.on_prem_selectors
+
+  depends_on = [
+    google_compute_forwarding_rule.gw_fw_esp,
+    google_compute_forwarding_rule.gw_fw_udp_500,
+    google_compute_forwarding_rule.gw_fw_udp_4500
+  ]
+}
+
+resource "google_compute_route" "rt_to_on_prem" {
+  count               = length(var.on_prem_selectors)
+  name                = "to-on-prem-${count.index + 1}"
+  network             = "dom-lab-hub"
+  dest_range          = var.on_prem_selectors[count.index]
+  next_hop_vpn_tunnel = google_compute_vpn_tunnel.to_lazurowa.id
+}
+
+resource "google_compute_instance" "vm_hub" {
+  name           = "vm-hub"
   machine_type   = "e2-micro"
   can_ip_forward = false
-  description    = "Terraform test instance"
+  description    = "A VM in the hub network"
 
   boot_disk {
     initialize_params {
@@ -31,11 +169,43 @@ resource "google_compute_instance" "vm_1" {
   }
 
   network_interface {
-    network    = "dom-lab-vpc"
+    network    = "dom-lab-hub"
-    subnetwork = "pl-hub"
+    subnetwork = "hub"
   }
 
   metadata = {
     ssh-keys = "${var.ssh[0].public_key} ${var.ssh[0].ssh_user}"
   }
 }
+
+output "vm_hub_ip" {
+  value = google_compute_instance.vm_hub.network_interface[0].network_ip
+}
+
+resource "google_compute_instance" "vm_spoke" {
+  name           = "vm-spoke"
+  machine_type   = "e2-micro"
+  can_ip_forward = false
+  description    = "A VM in the spoke network"
+  # project        = "spoke-network"
+
+  boot_disk {
+    initialize_params {
+      image = "debian-cloud/debian-12"
+    }
+  }
+
+  network_interface {
+    network            = "dom-lab-spoke"
+    subnetwork         = "spoke"
+    # subnetwork_project = "spoke-network"
+  }
+
+  metadata = {
+    ssh-keys = "${var.ssh[0].public_key} ${var.ssh[0].ssh_user}"
+  }
+}
+
+output "vm_spoke_ip" {
+  value = google_compute_instance.vm_spoke.network_interface[0].network_ip
+}

variables.tf

@@ -4,4 +4,37 @@ variable "ssh" {
     public_key = string
     ssh_user   = string
   }))
+  default = [{
+    public_key = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID1Z96CGdoNnbazs89cdnDLDdju6UtuKAZctEAmnEaAC"
+    ssh_user   = "slawek@1password"
+  }]
+}
+
+variable "shared_secret" {
+  description = "Shared secret for the VPN tunnel"
+  type        = string
+  sensitive   = true
+}
+
+variable "peer_ip" {
+  description = "IP address of the peer VPN gateway"
+  type        = string
+}
+
+variable "hub_cidr" {
+  description = "Hub CIDR block"
+  type        = string
+  default     = "192.168.16.0/24"
+}
+
+variable "spoke_cidr" {
+  description = "Spoke CIDR block"
+  type        = string
+  default     = "192.168.17.0/24"
+}
+
+variable "on_prem_selectors" {
+  type        = list(string)
+  default     = ["192.168.2.0/24", "192.168.10.0/24"]
+  description = "On-premise traffic selectors"
 }