I am trying to fetch the list of all tenants using OpenStack identity API V2.0. I have an "admin" user, which I made a user and administrator in all tenants. If I authenticate to public URL (port 5000), and then make the /v2.0/tenants GET call, I receive only the "admin" tenant in the response. The "admin" project is specified as the primary project for user "admin" in the Horizon UI.

I tried to follow the suggestion https://ask.openstack.org/en/question/160/openstack-apis-and-admin-user/?answer=236#post-id-236 (in this thread), but all that gave me was just one other tenant: the "services" tenant which appears in the distribution I'm using at the moment (Mirantis).

Is this the correct way to do this?