I create an instance of KeyStone like so:
import cherrypy
from keystoneauth1 import session as session
from keystoneclient.v3 import client as client
from keystoneauth1.identity import v3
auth = v3.Password(auth_url = KEYSTONE_URL, username = cherrypy.session['username'], password = cherrypy.session['password'], user_domain_name=OPENSTACK_DEFAULT_DOMAIN, project_name = 'admin', project_id = 'c9aee696c4b54f12a645af2c951327dc', project_domain_name = 'default')
sess = session.Session(auth=auth)
keystoneClient = client.Client(session=sess)
When I perform this code as well:
projectList = keystoneClient.projects.list()
print projectList
The following error occurs:
HTTP Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/cherrypy/_cprequest.py", line 656, in respond
response.body = self.handler()
File "/usr/lib/python2.7/site-packages/cherrypy/lib/encoding.py", line 188, in __call__
self.body = self.oldhandler(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/cherrypy/lib/jsontools.py", line 61, in json_handler
value = cherrypy.serving.request._json_inner_handler(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/cherrypy/_cpdispatch.py", line 34, in __call__
return self.callable(*self.args, **self.kwargs)
File "/var/www/frontend/controllers/api/user.py", line 58, in PUT
projectList = keystoneClient.projects.list()
File "/usr/lib/python2.7/site-packages/positional/__init__.py", line 101, in inner
return wrapped(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/keystoneclient/v3/projects.py", line 107, in list
**kwargs)
File "/usr/lib/python2.7/site-packages/keystoneclient/base.py", line 75, in func
return f(*args, **new_kwargs)
File "/usr/lib/python2.7/site-packages/keystoneclient/base.py", line 383, in list
self.collection_key)
File "/usr/lib/python2.7/site-packages/keystoneclient/base.py", line 124, in _list
resp, body = self.client.get(url, **kwargs)
File "/usr/lib/python2.7/site-packages/keystoneauth1/adapter.py", line 173, in get
return self.request(url, 'GET', **kwargs)
File "/usr/lib/python2.7/site-packages/keystoneauth1/adapter.py", line 331, in request
resp = super(LegacyJsonAdapter, self).request(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/keystoneauth1/adapter.py", line 98, in request
return self.session.request(url, method, **kwargs)
File "/usr/lib/python2.7/site-packages/positional/__init__.py", line 101, in inner
return wrapped(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/keystoneauth1/session.py", line 387, in request
auth_headers = self.get_auth_headers(auth)
File "/usr/lib/python2.7/site-packages/keystoneauth1/session.py", line 647, in get_auth_headers
return auth.get_headers(self, **kwargs)
File "/usr/lib/python2.7/site-packages/keystoneauth1/plugin.py", line 84, in get_headers
token = self.get_token(session)
File "/usr/lib/python2.7/site-packages/keystoneauth1/identity/base.py", line 90, in get_token
return self.get_access(session).auth_token
File "/usr/lib/python2.7/site-packages/keystoneauth1/identity/base.py", line 136, in get_access
self.auth_ref = self.get_auth_ref(session)
File "/usr/lib/python2.7/site-packages/keystoneauth1/identity/v3/base.py", line 167, in get_auth_ref
authenticated=False, log=False, **rkwargs)
File "/usr/lib/python2.7/site-packages/keystoneauth1/session.py", line 595, in post
return self.request(url, 'POST', **kwargs)
File "/usr/lib/python2.7/site-packages/positional/__init__.py", line 101, in inner
return wrapped(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/keystoneauth1/session.py", line 469, in request
resp = send(**kwargs)
File "/usr/lib/python2.7/site-packages/keystoneauth1/session.py", line 507, in _send_request
raise exceptions.SSLError(msg)
SSLError: SSL exception connecting to https://dev-openstack.nubes.rl.ac.uk:5000/v3/auth/tokens: HTTPSConnectionPool(host='dev-openstack.nubes.rl.ac.uk', port=5000): Max retries exceeded with url: /v3/auth/tokens (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')],)",),))
The same occurs whether I do this or I use Nova to list the VMs running, so I'm thinking it's something to do with the authenication maybe, although I could be wrong. I would like to understand:
The error seems pretty clear: "certificate verify failed". You have an SSL certificate validation problem. You need to place a trusted CA certificate where the requests library (used by all OpenStack clients for HTTP operations) will find it, which may be both OS and distribution specific.
If you have the Python certifi module installed, requests will use that to locate a CA certificate bundle. If you distribution customizes certifi appropriately, it will point at the same certificate bundle that is used by other system tools. For example, on my (Fedora) system:
>>> import certifi
>>> certifi.where()
'/etc/pki/tls/certs/ca-bundle.crt'
If certifi is available but has not been customized by your distribution, the CA bundle will be the file cacert.pem contained in the certifi module directory.
If certifi is not available, then requests will default to using it's own cacert.pem located in the requests module directory.
Your job is to (a) figure out which of those CA bundles is being used and then (b) install the CA certificate used to sign your openstack SSL certificates into that file.
Alternately, you can set the OS_CACERT environment file to point to an appropriate certificate bundle.
See also this bug