As explained in IRC, that looks like a configuration problem :

- 
https://github.com/openstack/python-ironicclient/blob/master/ironicclient/client.py#L78
 takes the endpoint value from ironic_url in parameters
- whose value is taken from a config opt 
https://github.com/openstack/nova/blob/master/nova/api/openstack/compute/baremetal_nodes.py#L60
- where 
https://github.com/openstack/nova/blob/master/nova/conf/ironic.py#L29-L31 is 
default to None (meaning you have to set it)


** Changed in: python-ironicclient
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1569242

Title:
  api error on running command : nova baremetal-node-list

Status in OpenStack Compute (nova):
  Invalid
Status in python-ironicclient:
  Invalid

Bug description:
   nova baremetal-node-list
  ERROR (ClientException): Unexpected API Error. Please report this at 
http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  <class 'ironicclient.exc.AmbiguousAuthSystem'> (HTTP 500) (Request-ID: 
req-bebb641d-18e6-4016-8939-860216fcc754)

  This is the nova-api log

  2016-04-12 14:55:36.671 ERROR nova.api.openstack.extensions 
[req-f6b69035-d1ee-487a-9380-b5c715cbb368 admin admin] Unexpected exception in 
API method
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions Traceback (most 
recent call last):
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions   File 
"/opt/stack/nova/nova/api/openstack/extensions.py", line 478, in wrapped
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions     return 
f(*args, **kwargs)
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions   File 
"/opt/stack/nova/nova/api/openstack/compute/baremetal_nodes.py", line 90, in 
index
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions     icli = 
_get_ironic_client()
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions   File 
"/opt/stack/nova/nova/api/openstack/compute/baremetal_nodes.py", line 61, in 
_get_ironic_client
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions     icli = 
ironic_client.get_client(CONF.ironic.api_version, **kwargs)
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions   File 
"/usr/local/lib/python2.7/dist-packages/ironicclient/client.py", line 137, in 
get_client
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions     raise 
exc.AmbiguousAuthSystem(exception_msg)
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions 
AmbiguousAuthSystem: Must provide Keystone credentials or user-defined endpoint 
and token
  2016-04-12 14:55:36.671 TRACE nova.api.openstack.extensions 
  2016-04-12 14:55:36.746 INFO nova.api.openstack.wsgi 
[req-f6b69035-d1ee-487a-9380-b5c715cbb368 admin admin] HTTP exception thrown: 
Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and 
attach the Nova API log if possible.
  <class 'ironicclient.exc.AmbiguousAuthSystem'>
  2016-04-12 14:55:36.750 DEBUG nova.api.openstack.wsgi 
[req-f6b69035-d1ee-487a-9380-b5c715cbb368 admin admin] Returning 500 to user: 
Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and 
attach the Nova API log if possible.
  <class 'ironicclient.exc.AmbiguousAuthSystem'> from (pid=3874) __call__ 
/opt/stack/nova/nova/api/openstack/wsgi.py:1070
  2016-04-12 14:55:36.766 INFO nova.osapi_compute.wsgi.server 
[req-f6b69035-d1ee-487a-9380-b5c715cbb368 admin admin] 192.168.122.72 "GET 
/v2.1/os-baremetal-nodes HTTP/1.1" status: 500 len: 513 time: 1.7956100

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