# 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
import re
import six
from keystoneclient import access
from keystoneclient import adapter
from keystoneclient.auth.identity import base
from keystoneclient import discover
import requests
from cinderclient import exceptions
from cinderclient.openstack.common import importutils
from cinderclient.openstack.common.gettextutils import _
from oslo_utils 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']
# tell keystoneclient that we can ignore the /v1|v2/{project_id} component of
# the service catalog when doing discovery lookups
for svc in ('volume', 'volumev2'):
discover.add_catalog_discover_hack(svc, re.compile('/v[12]/\w+/?$'), '/')
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 url: '%(url)s'. It must include one of: %(version)s.")
% {'url': url, 'version': ', '.join(_VALID_VERSIONS)})
raise exceptions.UnsupportedVersion(msg)
class SessionClient(adapter.LegacyJsonAdapter):
def request(self, *args, **kwargs):
kwargs.setdefault('authenticated', False)
# Note(tpatil): The standard call raises errors from
# keystoneclient, here we need to raise the cinderclient errors.
raise_exc = kwargs.pop('raise_exc', True)
resp, body = super(SessionClient, self).request(*args,
raise_exc=False,
**kwargs)
if raise_exc and resp.status_code >= 400:
raise exceptions.from_response(resp, body)
return resp, body
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):
try:
version = get_volume_api_from_url(self.get_endpoint())
except exceptions.UnsupportedVersion as e:
msg = (_("Service catalog returned invalid url.\n"
"%s") % six.text_type(e.message))
raise exceptions.UnsupportedVersion(msg)
return version
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)
body = None
if resp.text:
try:
body = json.loads(resp.text)
except ValueError as e:
self._logger.debug("Load http response text error: %s", e)
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):
try:
version = get_volume_api_from_url(self.management_url)
except exceptions.UnsupportedVersion as e:
if self.management_url == self.bypass_url:
msg = (_("Invalid url was specified in --bypass-url or "
"environment variable CINDERCLIENT_BYPASS_URL.\n"
"%s") % six.text_type(e.message))
else:
msg = (_("Service catalog returned invalid url.\n"
"%s") % six.text_type(e.message))
raise exceptions.UnsupportedVersion(msg)
return version
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,
service_name=self.service_name)
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 set_management_url(self, url):
self.management_url = url
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)