Undercloud install is failing with Forbidden (HTTP 403)

Issue

• Undercloud install did not complete successfully, seeing permission denied when trying to run: ironic node-list or openstack stack list. Able to run openstack subnet list and openstack image list without issue.

• Undercloud install fails with:

2018-01-31 09:53:20,940 DEBUG: GET call to compute for http://192.168.24.1:8774/v2.1/flavors/detail used request id req-340e20d9-de5c-45c6-b583-3767a94d338e
2018-01-31 09:53:20,942 DEBUG: REQ: curl -g -i -X GET http://192.168.24.1:6385/v1/nodes/?fields=uuid,resource_class -H "X-OpenStack-Ironic-API-Version: 1.21" -H "User-Agent: python-ironicclient" -H "Content-Type: application/json" -H "Accept: application/json" -H "X-Auth-Token: {SHA1}c2483d4d77aea8c532f4d0abc24f42cf753cbbaf"
2018-01-31 09:53:20,943 INFO: Starting new HTTP connection (1): 192.168.24.1
2018-01-31 09:53:20,944 DEBUG: "GET /v1/nodes/?fields=uuid,resource_class HTTP/1.1" 403 211
2018-01-31 09:53:20,944 DEBUG: RESP: [403] Date: Wed, 31 Jan 2018 14:53:20 GMT Server: Apache Content-Length: 211 Keep-Alive: timeout=15, max=100 Connection: Keep-Alive Content-Type: text/html; charset=iso-8859-1
RESP BODY: Omitted, Content-Type is set to text/html; charset=iso-8859-1. Only application/json responses have their bodies logged.

2018-01-31 09:53:20,945 DEBUG: An exception occurred
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 1780, in install
    _post_config(instack_env)
  File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 1678, in _post_config
    _ensure_node_resource_classes(ironic)
  File "/usr/lib/python2.7/site-packages/instack_undercloud/undercloud.py", line 1429, in _ensure_node_resource_classes
    for node in ironic.node.list(limit=0, fields=['uuid', 'resource_class']):
  File "/usr/lib/python2.7/site-packages/ironicclient/v1/node.py", line 143, in list
    limit=limit)
  File "/usr/lib/python2.7/site-packages/ironicclient/common/base.py", line 149, in _list_pagination
    resp, body = self.api.json_request('GET', url)
  File "/usr/lib/python2.7/site-packages/ironicclient/common/http.py", line 558, in json_request
    resp = self._http_request(url, method, **kwargs)
  File "/usr/lib/python2.7/site-packages/ironicclient/common/http.py", line 188, in wrapper
    return func(self, url, method, **kwargs)
  File "/usr/lib/python2.7/site-packages/ironicclient/common/http.py", line 540, in _http_request
    error_json.get('debuginfo'), method, url)
Forbidden: Forbidden (HTTP 403)
2018-01-31 09:53:20,946 ERROR:
#############################################################################
Undercloud install failed.

Reason: Forbidden (HTTP 403)