1- Need to know the API version ( v2.0)
2- Openstack API listen on port 8774 ( http://<IP@>:8774 )
https://docs.openstack.org/juno/config-reference/content/list-of-compute-config-options.html
osapi_compute_listen_port = 8774
https://docs.openstack.org/juno/config-reference/content/list-of-compute-config-options.html
osapi_compute_listen_port = 8774