--- /etc/ansible/roles/os_glance/defaults/main.yml      2018-10-25 13:28:34.090439064 +0200
+++ /etc/ansible/roles/os_glance/defaults/main_patched.yml      2018-10-25 13:28:24.490880735 +0200
@@ -181,7 +181,7 @@
 glance_image_cache_max_size: 10737418240
 
 # CORS options
-glance_cors_allowed_origin: "{{ (glance_show_multiple_locations | bool) | ternary(external_lb_vip_address, None) }}"
+glance_cors_allowed_origin: "{{ (glance_show_multiple_locations | bool) | ternary(openstack_service_publicuri_proto + '://' + external_lb_vip_address, None) }}"
 # If ``glance_api_workers`` is unset the system will use half the number of available VCPUS to
 # compute the number of api workers to use.
 # glance_api_workers: 16