Add tripleo-operator for import nodes

Change shell script for importing node by operator.
Leave it as is for releases before Ussuri.
Instead of stackrc use OS_CLOUD='undercloud'
Change-Id: I0b8c211f15bcc6437a94a848f386f17c115e963c

roles/overcloud-prep-images/tasks/overcloud-prep-images.yml

@@ -31,13 +31,32 @@
   changed_when: true
   when: undercloud_enable_nova|bool
 
-- name: Import and register overcloud nodes
-  shell: >
-    set -o pipefail &&
-    {{ working_dir }}/overcloud-import-nodes.sh 2>&1 {{ timestamper_cmd }} >
-    {{ overcloud_import_nodes_log }}
-  changed_when: true
-  when: step_register|bool
+- name: Run import nodes
+  when:
+    - step_register|bool
+  block:
+    - name: Import and register overcloud nodes - legacy
+      when:
+        - release in ['queens', 'rocky', 'stein', 'train']
+      shell: >
+        set -o pipefail &&
+        {{ working_dir }}/overcloud-import-nodes.sh 2>&1 {{ timestamper_cmd }} >
+        {{ overcloud_import_nodes_log }}
+      changed_when: true
+
+    - name: Run import nodes via tripleo-operator-ansible
+      when:
+        - release not in ['queens', 'rocky', 'stein', 'train']
+      collections:
+        - tripleo.operator
+      include_role:
+        name: tripleo_overcloud_node_import
+      vars:
+        tripleo_overcloud_node_import_debug: true
+        tripleo_os_cloud: undercloud
+        tripleo_overcloud_node_import_provide: "{{ not step_introspect|bool and not step_introspect_with_retry|bool }}"
+        tripleo_overcloud_node_import_log: "{{ overcloud_import_nodes_log }}"
+        tripleo_overcloud_node_import_environment_file: instackenv.json
 
 - name: Set root device size
   shell: >

roles/overcloud-prep-images/templates/overcloud-import-nodes.sh.j2

@@ -17,10 +17,7 @@ source {{ working_dir }}/stackrc
 ## * Register nodes with Ironic.
 ## ::
 
-{% if release in ['mitaka'] %}
-openstack baremetal import --json instackenv.json
-openstack baremetal configure boot
-{% elif step_introspect|bool or step_introspect_with_retry|bool %}
+{% if step_introspect|bool or step_introspect_with_retry|bool %}
 openstack overcloud node import instackenv.json
 {% else %}
 openstack overcloud node import instackenv.json --provide