$ export OS_AUTH_URL=https://vio.acme.local:5000/v3
$ openstack service list
Unable to establish connection to https://192.168.51.61:5000/v3/auth/tokens

Mais je ne veux pas me connecter sur https://192.168.51.61:5000/v3/auth/tokens mais sur https://vio.acme.local:5000/v3 ! D'où sort ce 192.168.51.61 ?

Voilà la réponse

curl https://vio.acme.local:5000/ |jq

{
  "versions": {
    "values": [
      {
        "status": "stable",
        "updated": "2018-02-28T00:00:00Z",
        "media-types": [
          {
            "base": "application/json",
            "type": "application/vnd.openstack.identity-v3+json"
          }
        ],
        "id": "v3.10",
        "links": [
          {
            "href": "https://192.168.51.61:5000/v3/",
            "rel": "self"
          }
        ]
      },
      {
        "status": "deprecated",
        "updated": "2016-08-04T00:00:00Z",
        "media-types": [
          {
            "base": "application/json",
            "type": "application/vnd.openstack.identity-v2.0+json"
          }
        ],
        "id": "v2.0",
        "links": [
          {
            "href": "https://192.168.51.61:5000/v2.0/",
            "rel": "self"
          },
          {
            "href": "https://docs.openstack.org/",
            "type": "text/html",
            "rel": "describedby"
          }
        ]
      }
    ]
  }
}

Mais comment cela se fait-il que ça marche sous Ubuntu (paquet plus récent) sans passer par 192.168.51.61:5000 ?

Pour infos (Sur une machine Ubuntu OK)

openstack endpoint list |grep identity

En mode debug

openstack service list --debug

Using auth plugin: password
Using parameters {'username': 'Admin', 'project_name': 'admin', 'user_domain_name': 'local', 'auth_url': 'https://vio.acme.local:5000/v3', 'password': '***', 'project_domain_id': 'default'}
Get auth_ref
REQ: curl -g -i --cacert "/etc/ssl/certs/" -X GET https://vio.acme.local:5000/v3 -H "Accept: application/json" -H "User-Agent: osc-lib keystoneauth1/2.12.1 python-requests/2.12.4 CPython/2.7.13"
Starting new HTTPS connection (1): vio.acme.local
https://vio.acme.local:5000 "GET /v3 HTTP/1.1" 200 253
RESP: [200] Date: Fri, 15 Mar 2019 16:24:42 GMT Server: Apache/2.4.18 (Ubuntu) Vary: X-Auth-Token,Accept-Encoding X-Distribution: Ubuntu x-openstack-request-id: req-e9811abb-cd7a-4811-8164-76e86fcedc59 Content-Type: application/json Content-Length: 253
RESP BODY: {"version": {"status": "stable", "updated": "2018-02-28T00:00:00Z", "media-types": [{"base": "application/json", "type": "application/vnd.openstack.identity-v3+json"}], "id": "v3.10", "links": [{"href": "https://192.168.51.61:5000/v3/", "rel": "self"}]}}

Making authentication request to https://192.168.51.61:5000/v3/auth/tokens
Starting new HTTPS connection (1): 192.168.51.61

Voir Installer le client OpenStack via pip