Allow to extend default ironic_driver_types

This patch implements extra variable that allows to define extra types
for ironic without need to fully override the existing ones.

Depends-On: https://review.opendev.org/c/openstack/openstack-ansible-os_tempest/+/907180
Change-Id: Ic35dbeae949ba4425a0e352e51de64122b7c13d5

defaults/main.yml

@@ -363,6 +363,9 @@ ironic_drivers_enabled:
   - agent_ipmitool
   - pxe_ipmitool
 
+# extra driver types defined by user
+ironic_user_driver_types: {}
+
 ironic_inspector_developer_mode: false
 ironic_inspector_venv_python_executable: "{{ openstack_venv_python_executable | default('python2') }}"
 

releasenotes/notes/ironic_user_driver_types-0572dc857f534b92.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Added variable ``ironic_user_driver_types`` that allow to extend
+    the default ``ironic_driver_types`` as well as override existing
+    default records.

vars/main.yml

@@ -332,9 +332,10 @@ filtered_ironic_drivers: |-
   {% else %}
   {% set concat_drivers = [] %}
   {% endif %}
+  {% set _driver_types = ironic_driver_types | combine(ironic_user_driver_types, recursive=True) %}
   {% for driver in ironic_drivers_enabled %}
-  {%   if driver in ironic_driver_types.keys() %}
+  {%   if driver in _driver_types.keys() %}
-  {%     set _ = concat_drivers.append(ironic_driver_types[driver]) %}
+  {%     set _ = concat_drivers.append(_driver_types[driver]) %}
   {%   endif %}
   {% endfor %}
   {{ concat_drivers }}