make the pool name a function of the vm name

multiple/shared_modules/cloud-init.tf

@@ -3,6 +3,6 @@ resource "libvirt_cloudinit_disk" "commoninit" {
   user_data = templatefile("${path.module}/cloud_init.yaml", {
     ssh_key = var.ssh_key
   })
-  pool      = var.pool_name
+  pool      =  "${var.vm_name}-pool"
   depends_on = [libvirt_pool.tf_tmp_storage]
 }

multiple/shared_modules/pool.tf

@@ -1,5 +1,5 @@
 resource "libvirt_pool" "tf_tmp_storage" {
-  name = var.pool_name
+  name = "${var.vm_name}-pool"
   type = "dir"
   target {
     path = var.pool_path

multiple/shared_modules/volume.tf

@@ -1,7 +1,7 @@
 resource "libvirt_volume" "vm_disk" {
   count  = var.instance_count
   name   = "${var.vm_name}-${count.index}"
-  pool   = var.pool_name
+  pool   = "${var.vm_name}-pool"
   source = var.image_location
   format = "qcow2"