--- /etc/ansible/roles/os_nova/tasks/main.yml~  2018-04-04 01:55:30.000000000 +0000
+++ /etc/ansible/roles/os_nova/tasks/main.yml   2018-04-04 20:30:27.018781063 +0000
@@ -130,7 +130,7 @@
 # the database connection string and therefore
 # cannot run nova-manage.
 - include: nova_db_post_setup.yml
-  delegate_to: "{{ random_conductor }}"
+  delegate_to: "{{ hostvars[random_conductor]['ansible_host'] }}"
   run_once: true
   when:
     - "nova_services['nova-compute']['group'] in group_names"