fix instance_id in compute inventory to be target image, not deployed image

Author: sjpb

environments/skeleton/{{cookiecutter.environment}}/tofu/inventory.tpl

@@ -38,8 +38,10 @@ ${cluster_name}_${group_name}:
         ${ node.name }:
             ansible_host: ${node.access_ip_v4}
             instance_id: ${ node.id }
-            image_id: ${ node.image_id }
 %{ endfor ~}
+    vars:
+        # NB: this is the target image, not necessarily what is provisioned
+        image_id: ${compute_groups[group_name]["image_id"]}
 %{ endfor ~}
 
 compute:

environments/skeleton/{{cookiecutter.environment}}/tofu/node_group/nodes.tf

@@ -144,3 +144,7 @@ resource "openstack_compute_instance_v2" "compute" {
 output "compute_instances" {
     value = local.compute_instances
 }
+
+output "image_id" {
+  value = var.image_id
+}