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

{
  "name": "dreamcompute",
  "profile": {
    "auth": {
      "auth_url": "https://iad2.dream.io:5000"
    },
    "identity_api_version": "3",
    "region_name": "RegionOne",
    "image_format": "raw"
  }
}