b5cb3b4158
Rename the module to fit with the repo rename Change-Id: I8f3c5a3d1f481a82d742b0b00a52a6d78d76630d
146 lines
5.0 KiB
Python
146 lines
5.0 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
""" Lightweight (keystone) client for the OpenStack Identity API """
|
|
|
|
import logging
|
|
import requests
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class KeystoneException(Exception):
|
|
def __init__(self, message, exc=None, response=None):
|
|
if exc:
|
|
message += "\nReason: %s" % exc
|
|
super(KeystoneException, self).__init__(message)
|
|
|
|
self.response = response
|
|
self.exception = exc
|
|
|
|
|
|
class InvalidResponse(KeystoneException):
|
|
def __init__(self, exc, response):
|
|
super(InvalidResponse, self).__init__(
|
|
"Invalid response from ident", exc, response)
|
|
|
|
|
|
class MissingServices(KeystoneException):
|
|
def __init__(self, message, exc, response):
|
|
super(MissingServices, self).__init__(
|
|
"MissingServices: " + message, exc, response)
|
|
|
|
|
|
class ClientV3(object):
|
|
"""Light weight client for the OpenStack Identity API V3.
|
|
|
|
:param string username: Username for authentication.
|
|
:param string password: Password for authentication.
|
|
:param string tenant_name: Tenant name.
|
|
:param string auth_url: Keystone service endpoint for authorization.
|
|
|
|
"""
|
|
|
|
def __init__(self, auth_url, username, password, tenant_name):
|
|
"""Initialize a new client"""
|
|
|
|
self.auth_url = auth_url
|
|
self.username = username
|
|
self.password = password
|
|
self.tenant_name = tenant_name
|
|
self._auth_token = None
|
|
self._services = ()
|
|
self._services_by_name = {}
|
|
|
|
@property
|
|
def auth_token(self):
|
|
"""Return token string usable for X-Auth-Token """
|
|
# actualize token
|
|
self.refresh()
|
|
return self._auth_token
|
|
|
|
@property
|
|
def services(self):
|
|
"""Return list of services retrieved from identity server """
|
|
return self._services
|
|
|
|
def refresh(self):
|
|
"""Refresh token and services list (getting it from identity server) """
|
|
headers = {'Accept': 'application/json'}
|
|
url = self.auth_url.rstrip('/') + '/auth/tokens'
|
|
params = {
|
|
'auth': {
|
|
'identity': {
|
|
'methods': ['password'],
|
|
'password': {
|
|
'user': {
|
|
'name': self.username,
|
|
'domain': {'id': 'default'},
|
|
'password': self.password
|
|
}
|
|
}
|
|
},
|
|
'scope': {
|
|
'project': {
|
|
'name': self.tenant_name,
|
|
'domain': {'id': 'default'}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
resp = requests.post(url, json=params, headers=headers)
|
|
resp_data = None
|
|
# processing response
|
|
try:
|
|
resp.raise_for_status()
|
|
resp_data = resp.json()['token']
|
|
self._services = tuple(resp_data['catalog'])
|
|
self._services_by_name = {
|
|
service['name']: service for service in self._services
|
|
}
|
|
self._auth_token = resp.headers['X-Subject-Token']
|
|
except (TypeError, KeyError, ValueError,
|
|
requests.exceptions.HTTPError) as e:
|
|
LOG.exception("Error processing response from keystone")
|
|
raise InvalidResponse(e, resp_data)
|
|
return resp_data
|
|
|
|
def get_service_endpoint(self, name, urlkey="internalURL", region=None):
|
|
"""Return url endpoint of service
|
|
|
|
possible values of urlkey = 'adminURL' | 'publicURL' | 'internalURL'
|
|
provide region if more endpoints are available
|
|
"""
|
|
|
|
try:
|
|
endpoints = self._services_by_name[name]['endpoints']
|
|
if not endpoints:
|
|
raise MissingServices("Missing name '%s' in received services"
|
|
% name,
|
|
None, self._services)
|
|
|
|
if region:
|
|
for ep in endpoints:
|
|
if ep['region'] == region and ep['interface'] in urlkey:
|
|
return ep["url"].rstrip('/')
|
|
else:
|
|
for ep in endpoints:
|
|
if ep['interface'] in urlkey:
|
|
return ep["url"].rstrip('/')
|
|
raise MissingServices("No valid endpoints found")
|
|
except (KeyError, ValueError) as e:
|
|
LOG.exception("Error while processing endpoints")
|
|
raise MissingServices("Missing data in received services",
|
|
e, self._services)
|