tested n8n template

terraform/modules/proxmox_vm_data/main.tf

@@ -0,0 +1,17 @@
+locals {
+  vm_data = {
+    vm_tag_data = {
+      for k, v in var.instances :
+      k => {
+        node_name = v.node_name
+        vm_name   = v.vm_name
+        tags      = v.vm_tags
+      }
+    }
+  }
+}
+
+resource "local_file" "vm_data" {
+  filename = var.filename
+  content  = yamlencode(local.vm_data)
+}

terraform/modules/proxmox_vm_data/outputs.tf

@@ -0,0 +1,7 @@
+output "filename" {
+  value = local_file.vm_data.filename
+}
+
+output "content" {
+  value = local_file.vm_data.content
+}

terraform/modules/proxmox_vm_data/variables.tf

@@ -0,0 +1,15 @@
+variable "filename" {
+  description = "Path to write the vm_data.yml file"
+  type        = string
+}
+
+variable "instances" {
+  description = "Normalized instance map keyed by instance key"
+  type = map(object({
+    service_name = string
+    vm_name      = string
+    node_name    = string
+    ipv4_address = string
+    vm_tags      = list(string)
+  }))
+}