Receive Handshake status 502 Bad Gateway during overcloud deployment

Issue

When running openstack overcloud deploy I receive a traceback showing the following error:

  File "/usr/lib/python2.7/site-packages/websocket/_handshake.py", line 152, in _get_resp_headers
    raise WebSocketBadStatusException("Handshake status %d %s", status, status_message)
WebSocketBadStatusException: Handshake status 502 Bad Gateway