Finished first version of network, network-peering and linux-vm modules.

modules/network-peering/main.tf

@@ -0,0 +1,24 @@
+# Peering
+resource "google_compute_network_peering" "left_to_right" {
+  name         = "${var.left.network_name}-to-${var.right.network_name}"
+  network      = var.left.network_id
+  peer_network = var.right.network_id
+
+  export_custom_routes = true
+  import_custom_routes = var.hub_spoke ? false : true
+
+  export_subnet_routes_with_public_ip = true
+  import_subnet_routes_with_public_ip = var.hub_spoke ? false : true
+}
+
+resource "google_compute_network_peering" "right_to_left" {
+  name         = "${var.right.network_name}-to-${var.left.network_name}"
+  network      = var.right.network_id
+  peer_network = var.left.network_id
+
+  export_custom_routes = var.hub_spoke ? false : true
+  import_custom_routes = true
+
+  export_subnet_routes_with_public_ip = var.hub_spoke ? false : true
+  import_subnet_routes_with_public_ip = true
+}

modules/network-peering/variables.tf

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+variable "left" {
+  description = "The left side of the peering connection."
+  type = object({
+    project_id   = string
+    network_id   = string
+    network_name = string
+  })
+}
+
+variable "right" {
+  description = "The right side of the peering connection."
+  type = object({
+    project_id   = string
+    network_id   = string
+    network_name = string
+  })
+}
+
+variable "hub_spoke" {
+  type        = bool
+  default     = false
+  description = "Set to true if the peering is hub-spoke."
+}