Comment 1 for bug 1405190

It is clearly because of interaction with nginx:

>> curl http://172.18.76.201:5000/v2.0 | jq '.'

{
  "version": {
    "links": [
      {
        "rel": "self",
        "href": "http://172.18.76.201:5000/v2.0/"
      },

>> curl http://172.18.76.201:8000/keystone/v2.0 | jq '.'
{
  "version": {
    "links": [
      {
        "rel": "self",
        "href": "http://10.108.80.2:5000/v2.0/"
      },

It works only if ipaddress of server is routable from your host, which should not be mandatory,
raising this to high, because we can easily provide workaround to turn off keystone discovery mechanism