os-client-config/os_client_config/vendors/unitedstack.json

{
  "name": "unitedstack",
  "profile": {
    "auth": {
      "auth_url": "https://identity.api.ustack.com/v3"
    },
    "regions": [
      "bj1",
      "gd1"
    ],
    "volume_api_version": "1",
    "identity_api_version": "3",
    "image_format": "raw",
    "floating_ip_source": "None"
  }
}