# Copyright (c) 2011 OpenStack Foundation
# Copyright 2010 Jacob Kaplan-Moss
# Copyright 2011 Piston Cloud Computing, Inc.
# All Rights Reserved.
#
# 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.
"""
OpenStack Client interface. Handles the REST calls and responses.
"""
from __future__ import print_function
import logging
from keystoneclient import access
from keystoneclient import adapter
from keystoneclient.auth.identity import base
import requests
from cinderclient import exceptions
from cinderclient.openstack.common import importutils
from cinderclient.openstack.common import strutils
osprofiler_web = importutils.try_import("osprofiler.web")
try:
import urlparse
except ImportError:
import urllib.parse as urlparse
try:
from eventlet import sleep
except ImportError:
from time import sleep
try:
import json
except ImportError:
import simplejson as json
# Python 2.5 compat fix
if not hasattr(urlparse, 'parse_qsl'):
import cgi
urlparse.parse_qsl = cgi.parse_qsl
_VALID_VERSIONS = ['v1', 'v2']
def get_volume_api_from_url(url):
scheme, netloc, path, query, frag = urlparse.urlsplit(url)
components = path.split("/")
for version in _VALID_VERSIONS:
if version in components:
return version[1:]
msg = "Invalid client version '%s'. must be one of: %s" % (
(version, ', '.join(_VALID_VERSIONS)))
raise exceptions.UnsupportedVersion(msg)
class SessionClient(adapter.LegacyJsonAdapter):
def request(self, *args, **kwargs):
kwargs.setdefault('authenticated', False)
return super(SessionClient, self).request(*args, **kwargs)
def _cs_request(self, url, method, **kwargs):
# this function is mostly redundant but makes compatibility easier
kwargs.setdefault('authenticated', True)
return self.request(url, method, **kwargs)
def get(self, url, **kwargs):
return self._cs_request(url, 'GET', **kwargs)
def post(self, url, **kwargs):
return self._cs_request(url, 'POST', **kwargs)
def put(self, url, **kwargs):
return self._cs_request(url, 'PUT', **kwargs)
def delete(self, url, **kwargs):
return self._cs_request(url, 'DELETE', **kwargs)
def get_volume_api_version_from_endpoint(self):
return get_volume_api_from_url(self.get_endpoint())
def authenticate(self, auth=None):
self.invalidate(auth)
return self.get_token(auth)
@property
def service_catalog(self):
# NOTE(jamielennox): This is ugly and should be deprecated.
auth = self.auth or self.session.auth
if isinstance(auth, base.BaseIdentityPlugin):
return auth.get_access(self.session).service_catalog
raise AttributeError('There is no service catalog for this type of '
'auth plugin.')
class HTTPClient(object):
USER_AGENT = 'python-cinderclient'
def __init__(self, user, password, projectid, auth_url=None,
insecure=False, timeout=None, tenant_id=None,
proxy_tenant_id=None, proxy_token=None, region_name=None,
endpoint_type='publicURL', service_type=None,
service_name=None, volume_service_name=None,
bypass_url=None, retries=None,
http_log_debug=False, cacert=None,
auth_system='keystone', auth_plugin=None):
self.user = user
self.password = password
self.projectid = projectid
self.tenant_id = tenant_id
if auth_system and auth_system != 'keystone' and not auth_plugin:
raise exceptions.AuthSystemNotFound(auth_system)
if not auth_url and auth_system and auth_system != 'keystone':
auth_url = auth_plugin.get_auth_url()
if not auth_url:
raise exceptions.EndpointNotFound()
self.auth_url = auth_url.rstrip('/') if auth_url else None
self.version = 'v1'
self.region_name = region_name
self.endpoint_type = endpoint_type
self.service_type = service_type
self.service_name = service_name
self.volume_service_name = volume_service_name
self.bypass_url = bypass_url.rstrip('/') if bypass_url else bypass_url
self.retries = int(retries or 0)
self.http_log_debug = http_log_debug
self.management_url = self.bypass_url or None
self.auth_token = None
self.proxy_token = proxy_token
self.proxy_tenant_id = proxy_tenant_id
self.timeout = timeout
if insecure:
self.verify_cert = False
else:
if cacert:
self.verify_cert = cacert
else:
self.verify_cert = True
self.auth_system = auth_system
self.auth_plugin = auth_plugin
self._logger = logging.getLogger(__name__)
def http_log_req(self, args, kwargs):
if not self.http_log_debug:
return
string_parts = ['curl -i']
for element in args:
if element in ('GET', 'POST', 'DELETE', 'PUT'):
string_parts.append(' -X %s' % element)
else:
string_parts.append(' %s' % element)
for element in kwargs['headers']:
header = ' -H "%s: %s"' % (element, kwargs['headers'][element])
string_parts.append(header)
if 'data' in kwargs:
if "password" in kwargs['data']:
data = strutils.mask_password(kwargs['data'])
else:
data = kwargs['data']
string_parts.append(" -d '%s'" % (data))
self._logger.debug("\nREQ: %s\n" % "".join(string_parts))
def http_log_resp(self, resp):
if not self.http_log_debug:
return
self._logger.debug(
"RESP: [%s] %s\nRESP BODY: %s\n",
resp.status_code,
resp.headers,
resp.text)
def request(self, url, method, **kwargs):
kwargs.setdefault('headers', kwargs.get('headers', {}))
kwargs['headers']['User-Agent'] = self.USER_AGENT
kwargs['headers']['Accept'] = 'application/json'
if osprofiler_web:
kwargs['headers'].update(osprofiler_web.get_trace_id_headers())
if 'body' in kwargs:
kwargs['headers']['Content-Type'] = 'application/json'
kwargs['data'] = json.dumps(kwargs['body'])
del kwargs['body']
if self.timeout:
kwargs.setdefault('timeout', self.timeout)
self.http_log_req((url, method,), kwargs)
resp = requests.request(
method,
url,
verify=self.verify_cert,
**kwargs)
self.http_log_resp(resp)
if resp.text:
try:
body = json.loads(resp.text)
except ValueError:
pass
body = None
else:
body = None
if resp.status_code >= 400:
raise exceptions.from_response(resp, body)
return resp, body
def _cs_request(self, url, method, **kwargs):
auth_attempts = 0
attempts = 0
backoff = 1
while True:
attempts += 1
if not self.management_url or not self.auth_token:
self.authenticate()
kwargs.setdefault('headers', {})['X-Auth-Token'] = self.auth_token
if self.projectid:
kwargs['headers']['X-Auth-Project-Id'] = self.projectid
try:
resp, body = self.request(self.management_url + url, method,
**kwargs)
return resp, body
except exceptions.BadRequest as e:
if attempts > self.retries:
raise
except exceptions.Unauthorized:
if auth_attempts > 0:
raise
self._logger.debug("Unauthorized, reauthenticating.")
self.management_url = self.auth_token = None
# First reauth. Discount this attempt.
attempts -= 1
auth_attempts += 1
continue
except exceptions.ClientException as e:
if attempts > self.retries:
raise
if 500 <= e.code <= 599:
pass
else:
raise
except requests.exceptions.ConnectionError as e:
self._logger.debug("Connection error: %s" % e)
if attempts > self.retries:
msg = 'Unable to establish connection: %s' % e
raise exceptions.ConnectionError(msg)
except requests.exceptions.Timeout as e:
self._logger.debug("Timeout error: %s" % e)
if attempts > self.retries:
raise
self._logger.debug(
"Failed attempt(%s of %s), retrying in %s seconds" %
(attempts, self.retries, backoff))
sleep(backoff)
backoff *= 2
def get(self, url, **kwargs):
return self._cs_request(url, 'GET', **kwargs)
def post(self, url, **kwargs):
return self._cs_request(url, 'POST', **kwargs)
def put(self, url, **kwargs):
return self._cs_request(url, 'PUT', **kwargs)
def delete(self, url, **kwargs):
return self._cs_request(url, 'DELETE', **kwargs)
def get_volume_api_version_from_endpoint(self):
return get_volume_api_from_url(self.management_url)
def _extract_service_catalog(self, url, resp, body, extract_token=True):
"""See what the auth service told us and process the response.
We may get redirected to another site, fail or actually get
back a service catalog with a token and our endpoints.
"""
if resp.status_code == 200: # content must always present
try:
self.auth_url = url
self.auth_ref = access.AccessInfo.factory(resp, body)
self.service_catalog = self.auth_ref.service_catalog
if extract_token:
self.auth_token = self.auth_ref.auth_token
management_url = self.service_catalog.url_for(
region_name=self.region_name,
endpoint_type=self.endpoint_type,
service_type=self.service_type)
self.management_url = management_url.rstrip('/')
return None
except exceptions.AmbiguousEndpoints:
print("Found more than one valid endpoint. Use a more "
"restrictive filter")
raise
except KeyError:
raise exceptions.AuthorizationFailure()
except exceptions.EndpointNotFound:
print("Could not find any suitable endpoint. Correct region?")
raise
elif resp.status_code == 305:
return resp['location']
else:
raise exceptions.from_response(resp, body)
def _fetch_endpoints_from_auth(self, url):
"""We have a token, but don't know the final endpoint for
the region. We have to go back to the auth service and
ask again. This request requires an admin-level token
to work. The proxy token supplied could be from a low-level enduser.
We can't get this from the keystone service endpoint, we have to use
the admin endpoint.
This will overwrite our admin token with the user token.
"""
# GET ...:5001/v2.0/tokens/#####/endpoints
url = '/'.join([url, 'tokens', '%s?belongsTo=%s'
% (self.proxy_token, self.proxy_tenant_id)])
self._logger.debug("Using Endpoint URL: %s" % url)
resp, body = self.request(url, "GET",
headers={'X-Auth-Token': self.auth_token})
return self._extract_service_catalog(url, resp, body,
extract_token=False)
def authenticate(self):
magic_tuple = urlparse.urlsplit(self.auth_url)
scheme, netloc, path, query, frag = magic_tuple
port = magic_tuple.port
if port is None:
port = 80
path_parts = path.split('/')
for part in path_parts:
if len(part) > 0 and part[0] == 'v':
self.version = part
break
# TODO(sandy): Assume admin endpoint is 35357 for now.
# Ideally this is going to have to be provided by the service catalog.
new_netloc = netloc.replace(':%d' % port, ':%d' % (35357,))
admin_url = urlparse.urlunsplit((scheme, new_netloc,
path, query, frag))
auth_url = self.auth_url
if self.version == "v2.0":
while auth_url:
if not self.auth_system or self.auth_system == 'keystone':
auth_url = self._v2_auth(auth_url)
else:
auth_url = self._plugin_auth(auth_url)
# Are we acting on behalf of another user via an
# existing token? If so, our actual endpoints may
# be different than that of the admin token.
if self.proxy_token:
if self.bypass_url:
self.set_management_url(self.bypass_url)
else:
self._fetch_endpoints_from_auth(admin_url)
# Since keystone no longer returns the user token
# with the endpoints any more, we need to replace
# our service account token with the user token.
self.auth_token = self.proxy_token
else:
try:
while auth_url:
auth_url = self._v1_auth(auth_url)
# In some configurations cinder makes redirection to
# v2.0 keystone endpoint. Also, new location does not contain
# real endpoint, only hostname and port.
except exceptions.AuthorizationFailure:
if auth_url.find('v2.0') < 0:
auth_url = auth_url + '/v2.0'
self._v2_auth(auth_url)
if self.bypass_url:
self.set_management_url(self.bypass_url)
elif not self.management_url:
raise exceptions.Unauthorized('Cinder Client')
def _v1_auth(self, url):
if self.proxy_token:
raise exceptions.NoTokenLookupException()
headers = {'X-Auth-User': self.user,
'X-Auth-Key': self.password}
if self.projectid:
headers['X-Auth-Project-Id'] = self.projectid
resp, body = self.request(url, 'GET', headers=headers)
if resp.status_code in (200, 204): # in some cases we get No Content
try:
mgmt_header = 'x-server-management-url'
self.management_url = resp.headers[mgmt_header].rstrip('/')
self.auth_token = resp.headers['x-auth-token']
self.auth_url = url
except (KeyError, TypeError):
raise exceptions.AuthorizationFailure()
elif resp.status_code == 305:
return resp.headers['location']
else:
raise exceptions.from_response(resp, body)
def _plugin_auth(self, auth_url):
return self.auth_plugin.authenticate(self, auth_url)
def _v2_auth(self, url):
"""Authenticate against a v2.0 auth service."""
body = {"auth": {
"passwordCredentials": {"username": self.user,
"password": self.password}}}
if self.projectid:
body['auth']['tenantName'] = self.projectid
elif self.tenant_id:
body['auth']['tenantId'] = self.tenant_id
self._authenticate(url, body)
def _authenticate(self, url, body):
"""Authenticate and extract the service catalog."""
token_url = url + "/tokens"
# Make sure we follow redirects when trying to reach Keystone
resp, body = self.request(
token_url,
"POST",
body=body,
allow_redirects=True)
return self._extract_service_catalog(url, resp, body)
def _construct_http_client(username=None, password=None, project_id=None,
auth_url=None, insecure=False, timeout=None,
proxy_tenant_id=None, proxy_token=None,
region_name=None, endpoint_type='publicURL',
service_type='volume',
service_name=None, volume_service_name=None,
bypass_url=None, retries=None,
http_log_debug=False,
auth_system='keystone', auth_plugin=None,
cacert=None, tenant_id=None,
session=None,
auth=None,
**kwargs):
# Don't use sessions if third party plugin is used
if session and not auth_plugin:
kwargs.setdefault('user_agent', 'python-cinderclient')
kwargs.setdefault('interface', endpoint_type)
return SessionClient(session=session,
auth=auth,
service_type=service_type,
service_name=service_name,
region_name=region_name,
**kwargs)
else:
# FIXME(jamielennox): username and password are now optional. Need
# to test that they were provided in this mode.
return HTTPClient(username,
password,
projectid=project_id,
auth_url=auth_url,
insecure=insecure,
timeout=timeout,
tenant_id=tenant_id,
proxy_token=proxy_token,
proxy_tenant_id=proxy_tenant_id,
region_name=region_name,
endpoint_type=endpoint_type,
service_type=service_type,
service_name=service_name,
volume_service_name=volume_service_name,
bypass_url=bypass_url,
retries=retries,
http_log_debug=http_log_debug,
cacert=cacert,
auth_system=auth_system,
auth_plugin=auth_plugin,
)
def get_client_class(version):
version_map = {
'1': 'cinderclient.v1.client.Client',
'2': 'cinderclient.v2.client.Client',
}
try:
client_path = version_map[str(version)]
except (KeyError, ValueError):
msg = "Invalid client version '%s'. must be one of: %s" % (
(version, ', '.join(version_map)))
raise exceptions.UnsupportedVersion(msg)
return importutils.import_class(client_path)
def Client(version, *args, **kwargs):
client_class = get_client_class(version)
return client_class(*args, **kwargs)