1e72de9e88
Add a function which takes a stack domain username/password and returns a token - this is for "one time" use, e.g for callback signals to wait conditions via the native API. blueprint: native-waitcondition Change-Id: I6f4666728c5ecadb1d9d081fb825a77cd598fd47
636 lines
28 KiB
Python
636 lines
28 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Keystone Client functionality for use by resources."""
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from collections import namedtuple
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import copy
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import json
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import uuid
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from keystoneclient.auth.identity import v3 as kc_auth_v3
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import keystoneclient.exceptions as kc_exception
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from keystoneclient import session
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from keystoneclient.v3 import client as kc_v3
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from oslo.config import cfg
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from heat.common import context
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from heat.common import exception
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from heat.openstack.common.gettextutils import _
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from heat.openstack.common import importutils
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from heat.openstack.common import log as logging
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LOG = logging.getLogger('heat.common.keystoneclient')
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AccessKey = namedtuple('AccessKey', ['id', 'access', 'secret'])
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_default_keystone_backend = "heat.common.heat_keystoneclient.KeystoneClientV3"
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keystone_opts = [
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cfg.StrOpt('keystone_backend',
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default=_default_keystone_backend,
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help="Fully qualified class name to use as a keystone backend.")
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]
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cfg.CONF.register_opts(keystone_opts)
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class KeystoneClientV3(object):
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"""Wrap keystone client so we can encapsulate logic used in resources.
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Note this is intended to be initialized from a resource on a per-session
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basis, so the session context is passed in on initialization
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Also note that a copy of this is created every resource as self.keystone()
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via the code in engine/client.py, so there should not be any need to
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directly instantiate instances of this class inside resources themselves.
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"""
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def __init__(self, context):
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# If a trust_id is specified in the context, we immediately
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# authenticate so we can populate the context with a trust token
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# otherwise, we delay client authentication until needed to avoid
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# unnecessary calls to keystone.
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#
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# Note that when you obtain a token using a trust, it cannot be
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# used to reauthenticate and get another token, so we have to
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# get a new trust-token even if context.auth_token is set.
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#
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# - context.auth_url is expected to contain a versioned keystone
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# path, we will work with either a v2.0 or v3 path
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self.context = context
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self._client = None
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self._admin_client = None
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self._domain_admin_client = None
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if self.context.auth_url:
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self.v3_endpoint = self.context.auth_url.replace('v2.0', 'v3')
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else:
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# Import auth_token to have keystone_authtoken settings setup.
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importutils.import_module('keystoneclient.middleware.auth_token')
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self.v3_endpoint = cfg.CONF.keystone_authtoken.auth_uri.replace(
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'v2.0', 'v3')
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if self.context.trust_id:
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# Create a client with the specified trust_id, this
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# populates self.context.auth_token with a trust-scoped token
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self._client = self._v3_client_init()
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# The stack domain user ID should be set in heat.conf
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# It can be created via python-openstackclient
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# openstack --os-identity-api-version=3 domain create heat
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# If the domain is specified, then you must specify a domain
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# admin user. If no domain is specified, we fall back to
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# legacy behavior with warnings.
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self._stack_domain_is_id = True
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self._stack_domain_id = None
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self.stack_domain = cfg.CONF.stack_user_domain_id
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if not self.stack_domain and cfg.CONF.stack_user_domain_name:
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self.stack_domain = cfg.CONF.stack_user_domain_name
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self._stack_domain_is_id = False
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self.domain_admin_user = cfg.CONF.stack_domain_admin
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self.domain_admin_password = cfg.CONF.stack_domain_admin_password
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if self.stack_domain:
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if not (self.domain_admin_user and self.domain_admin_password):
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raise exception.Error(_('heat.conf misconfigured, cannot '
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'specify "stack_user_domain_id" or '
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'"stack_user_domain_name" without '
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'"stack_domain_admin" and '
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'"stack_domain_admin_password"'))
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else:
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LOG.warning(_('stack_user_domain_id or stack_user_domain_name not '
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'set in heat.conf falling back to using default'))
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LOG.debug('Using stack domain %s' % self.stack_domain)
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@property
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def client(self):
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if not self._client:
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# Create connection to v3 API
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self._client = self._v3_client_init()
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return self._client
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@property
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def admin_client(self):
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if not self._admin_client:
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# Create admin client connection to v3 API
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admin_creds = self._service_admin_creds()
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admin_creds.update(self._ssl_options())
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c = kc_v3.Client(**admin_creds)
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if c.authenticate():
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self._admin_client = c
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else:
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LOG.error(_("Admin client authentication failed"))
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raise exception.AuthorizationFailure()
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return self._admin_client
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@property
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def domain_admin_client(self):
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if not self._domain_admin_client:
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# Create domain admin client connection to v3 API
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admin_creds = self._domain_admin_creds()
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admin_creds.update(self._ssl_options())
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c = kc_v3.Client(**admin_creds)
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# Note we must specify the domain when getting the token
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# as only a domain scoped token can create projects in the domain
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if self._stack_domain_is_id:
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auth_kwargs = {'domain_id': self.stack_domain}
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else:
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auth_kwargs = {'domain_name': self.stack_domain}
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if c.authenticate(**auth_kwargs):
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self._domain_admin_client = c
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else:
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LOG.error(_("Domain admin client authentication failed"))
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raise exception.AuthorizationFailure()
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return self._domain_admin_client
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def _v3_client_init(self):
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kwargs = {
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'auth_url': self.v3_endpoint,
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'endpoint': self.v3_endpoint
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}
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# Note try trust_id first, as we can't reuse auth_token in that case
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if self.context.trust_id is not None:
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# We got a trust_id, so we use the admin credentials
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# to authenticate with the trust_id so we can use the
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# trust impersonating the trustor user.
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kwargs.update(self._service_admin_creds())
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kwargs['trust_id'] = self.context.trust_id
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kwargs.pop('project_name')
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elif self.context.auth_token_info is not None:
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# The auth_ref version must be set according to the token version
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if 'access' in self.context.auth_token_info:
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kwargs['auth_ref'] = copy.deepcopy(
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self.context.auth_token_info['access'])
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kwargs['auth_ref']['version'] = 'v2.0'
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kwargs['auth_ref']['token']['id'] = self.context.auth_token
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elif 'token' in self.context.auth_token_info:
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kwargs['auth_ref'] = copy.deepcopy(
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self.context.auth_token_info['token'])
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kwargs['auth_ref']['version'] = 'v3'
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kwargs['auth_ref']['auth_token'] = self.context.auth_token
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else:
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LOG.error(_('Unknown version in auth_token_info'))
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raise exception.AuthorizationFailure(
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_('Unknown token version'))
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elif self.context.auth_token is not None:
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kwargs['token'] = self.context.auth_token
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kwargs['project_id'] = self.context.tenant_id
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elif self.context.password is not None:
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kwargs['username'] = self.context.username
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kwargs['password'] = self.context.password
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kwargs['project_id'] = self.context.tenant_id
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else:
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LOG.error(_("Keystone v3 API connection failed, no password "
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"trust or auth_token!"))
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raise exception.AuthorizationFailure()
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kwargs.update(self._ssl_options())
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client = kc_v3.Client(**kwargs)
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# If auth_ref has already be specified via auth_token_info, don't
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# authenticate as we want to reuse, rather than request a new token
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if 'auth_ref' not in kwargs:
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client.authenticate()
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# If we are authenticating with a trust set the context auth_token
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# with the trust scoped token
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if 'trust_id' in kwargs:
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# Sanity check
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if not client.auth_ref.trust_scoped:
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LOG.error(_("trust token re-scoping failed!"))
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raise exception.AuthorizationFailure()
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# Sanity check that impersonation is effective
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if self.context.trustor_user_id != client.auth_ref.user_id:
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LOG.error(_("Trust impersonation failed"))
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raise exception.AuthorizationFailure()
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return client
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def _service_admin_creds(self):
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# Import auth_token to have keystone_authtoken settings setup.
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importutils.import_module('keystoneclient.middleware.auth_token')
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creds = {
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'username': cfg.CONF.keystone_authtoken.admin_user,
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'password': cfg.CONF.keystone_authtoken.admin_password,
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'auth_url': self.v3_endpoint,
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'endpoint': self.v3_endpoint,
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'project_name': cfg.CONF.keystone_authtoken.admin_tenant_name}
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return creds
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def _domain_admin_creds(self):
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creds = {
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'username': self.domain_admin_user,
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'password': self.domain_admin_password,
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'auth_url': self.v3_endpoint,
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'endpoint': self.v3_endpoint}
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if self._stack_domain_is_id:
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creds['user_domain_id'] = self.stack_domain
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else:
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creds['user_domain_name'] = self.stack_domain
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return creds
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def _ssl_options(self):
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opts = {'cacert': self._get_client_option('ca_file'),
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'insecure': self._get_client_option('insecure'),
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'cert': self._get_client_option('cert_file'),
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'key': self._get_client_option('key_file')}
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return opts
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def _get_client_option(self, option):
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try:
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cfg.CONF.import_opt(option, 'heat.common.config',
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group='clients_keystone')
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return getattr(cfg.CONF.clients_keystone, option)
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except (cfg.NoSuchGroupError, cfg.NoSuchOptError):
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cfg.CONF.import_opt(option, 'heat.common.config', group='clients')
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return getattr(cfg.CONF.clients, option)
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def create_trust_context(self):
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"""Create a trust using the trustor identity in the current context.
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The trust is created with the trustee as the heat service user.
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If the current context already contains a trust_id, we do nothing
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and return the current context.
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Returns a context containing the new trust_id.
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"""
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if self.context.trust_id:
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return self.context
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# We need the service admin user ID (not name), as the trustor user
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# can't lookup the ID in keystoneclient unless they're admin
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# workaround this by getting the user_id from admin_client
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trustee_user_id = self.admin_client.auth_ref.user_id
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trustor_user_id = self.client.auth_ref.user_id
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trustor_project_id = self.client.auth_ref.project_id
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roles = cfg.CONF.trusts_delegated_roles
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trust = self.client.trusts.create(trustor_user=trustor_user_id,
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trustee_user=trustee_user_id,
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project=trustor_project_id,
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impersonation=True,
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role_names=roles)
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trust_context = context.RequestContext.from_dict(
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self.context.to_dict())
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trust_context.trust_id = trust.id
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trust_context.trustor_user_id = trustor_user_id
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return trust_context
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def delete_trust(self, trust_id):
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"""Delete the specified trust."""
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try:
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self.client.trusts.delete(trust_id)
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except kc_exception.NotFound:
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pass
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def _get_username(self, username):
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if(len(username) > 64):
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LOG.warning(_("Truncating the username %s to the last 64 "
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"characters.") % username)
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#get the last 64 characters of the username
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return username[-64:]
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def create_stack_user(self, username, password=''):
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"""Create a user defined as part of a stack.
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The user is defined either via template or created internally by a
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resource. This user will be added to the heat_stack_user_role as
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defined in the config.
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Returns the keystone ID of the resulting user.
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"""
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# FIXME(shardy): There's duplicated logic between here and
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# create_stack_domain user, but this function is expected to
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# be removed after the transition of all resources to domain
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# users has been completed
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stack_user_role = self.client.roles.list(
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name=cfg.CONF.heat_stack_user_role)
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if len(stack_user_role) == 1:
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role_id = stack_user_role[0].id
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# Create the user
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user = self.client.users.create(
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name=self._get_username(username), password=password,
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default_project=self.context.tenant_id)
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# Add user to heat_stack_user_role
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LOG.debug("Adding user %(user)s to role %(role)s" % {
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'user': user.id, 'role': role_id})
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self.client.roles.grant(role=role_id, user=user.id,
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project=self.context.tenant_id)
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else:
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LOG.error(_("Failed to add user %(user)s to role %(role)s, "
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"check role exists!") % {
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'user': username,
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'role': cfg.CONF.heat_stack_user_role})
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raise exception.Error(_("Can't find role %s")
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% cfg.CONF.heat_stack_user_role)
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return user.id
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def stack_domain_user_token(self, username, project_id, password):
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"""Get a token for a stack domain user."""
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if not self.stack_domain:
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# Note, no legacy fallback path as we don't want to deploy
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# tokens for non stack-domain users inside instances
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msg = _('Cannot get stack domain user token, no stack domain id '
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'configured, please fix your heat.conf')
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raise exception.Error(msg)
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# Create a keystoneclient session, then request a token with no
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# catalog (the token is expected to be used inside an instance
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# where a specific endpoint will be specified, and user-data
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# space is limited..)
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if self._stack_domain_is_id:
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auth = kc_auth_v3.Password(auth_url=self.v3_endpoint,
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username=username,
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password=password,
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project_id=project_id,
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user_domain_id=self.stack_domain)
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else:
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auth = kc_auth_v3.Password(auth_url=self.v3_endpoint,
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username=username,
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password=password,
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project_id=project_id,
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user_domain_name=self.stack_domain)
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sess = session.Session(auth=auth)
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# Note we do this directly via a post as there's currently
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# no way to get a nocatalog token via keystoneclient
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token_url = "%s/auth/tokens?nocatalog" % self.v3_endpoint
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headers = {'Accept': 'application/json'}
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if self._stack_domain_is_id:
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domain = {'id': self.stack_domain}
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else:
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domain = {'name': self.stack_domain}
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body = {'auth': {'scope':
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{'project': {'id': project_id}},
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'identity': {'password': {'user': {
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'domain': domain,
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'password': password, 'name': username}},
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'methods': ['password']}}}
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t = sess.post(token_url, headers=headers, json=body,
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authenticated=False)
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return t.headers['X-Subject-Token']
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def create_stack_domain_user(self, username, project_id, password=None):
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"""Create a domain user defined as part of a stack.
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The user is defined either via template or created internally by a
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resource. This user will be added to the heat_stack_user_role as
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defined in the config, and created in the specified project (which is
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expected to be in the stack_domain).
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Returns the keystone ID of the resulting user.
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"""
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if not self.stack_domain:
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# FIXME(shardy): Legacy fallback for folks using old heat.conf
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# files which lack domain configuration
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LOG.warning(_('Falling back to legacy non-domain user create, '
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'configure domain in heat.conf'))
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return self.create_stack_user(username=username, password=password)
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# We add the new user to a special keystone role
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# This role is designed to allow easier differentiation of the
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# heat-generated "stack users" which will generally have credentials
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# deployed on an instance (hence are implicitly untrusted)
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stack_user_role = self.domain_admin_client.roles.list(
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name=cfg.CONF.heat_stack_user_role)
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if len(stack_user_role) == 1:
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role_id = stack_user_role[0].id
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# Create user
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user = self.domain_admin_client.users.create(
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name=self._get_username(username), password=password,
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default_project=project_id, domain=self.stack_domain)
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# Add to stack user role
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LOG.debug("Adding user %(user)s to role %(role)s" % {
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'user': user.id, 'role': role_id})
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self.domain_admin_client.roles.grant(role=role_id, user=user.id,
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project=project_id)
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else:
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LOG.error(_("Failed to add user %(user)s to role %(role)s, "
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"check role exists!")
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% {'user': username,
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'role': cfg.CONF.heat_stack_user_role})
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raise exception.Error(_("Can't find role %s")
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% cfg.CONF.heat_stack_user_role)
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return user.id
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def _check_stack_domain_user(self, user_id, project_id, action):
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"""Sanity check that domain/project is correct."""
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user = self.domain_admin_client.users.get(user_id)
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if not self._stack_domain_id:
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if self._stack_domain_is_id:
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self._stack_domain_id = self.stack_domain
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else:
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domain = self.domain_admin_client.domains.get(
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self.stack_domain)
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self._stack_domain_id = domain.id
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if user.domain_id != self._stack_domain_id:
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raise ValueError(_('User %s in invalid domain') % action)
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if user.default_project_id != project_id:
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raise ValueError(_('User %s in invalid project') % action)
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def delete_stack_domain_user(self, user_id, project_id):
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if not self.stack_domain:
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# FIXME(shardy): Legacy fallback for folks using old heat.conf
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# files which lack domain configuration
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LOG.warning(_('Falling back to legacy non-domain user delete, '
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'configure domain in heat.conf'))
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return self.delete_stack_user(user_id)
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try:
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self._check_stack_domain_user(user_id, project_id, 'delete')
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self.domain_admin_client.users.delete(user_id)
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except kc_exception.NotFound:
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pass
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def delete_stack_user(self, user_id):
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|
try:
|
|
self.client.users.delete(user=user_id)
|
|
except kc_exception.NotFound:
|
|
pass
|
|
|
|
def create_stack_domain_project(self, stack_id):
|
|
"""Create a project in the heat stack-user domain."""
|
|
if not self.stack_domain:
|
|
# FIXME(shardy): Legacy fallback for folks using old heat.conf
|
|
# files which lack domain configuration
|
|
LOG.warning(_('Falling back to legacy non-domain project, '
|
|
'configure domain in heat.conf'))
|
|
return self.context.tenant_id
|
|
# Note we use the tenant ID not name to ensure uniqueness in a multi-
|
|
# domain environment (where the tenant name may not be globally unique)
|
|
project_name = ('%s-%s' % (self.context.tenant_id, stack_id))[:64]
|
|
desc = "Heat stack user project"
|
|
domain_project = self.domain_admin_client.projects.create(
|
|
name=project_name,
|
|
domain=self.stack_domain,
|
|
description=desc)
|
|
return domain_project.id
|
|
|
|
def delete_stack_domain_project(self, project_id):
|
|
if not self.stack_domain:
|
|
# FIXME(shardy): Legacy fallback for folks using old heat.conf
|
|
# files which lack domain configuration
|
|
LOG.warning(_('Falling back to legacy non-domain project, '
|
|
'configure domain in heat.conf'))
|
|
return
|
|
try:
|
|
self.domain_admin_client.projects.delete(project=project_id)
|
|
except kc_exception.NotFound:
|
|
pass
|
|
|
|
def _find_ec2_keypair(self, access, user_id=None):
|
|
"""Lookup an ec2 keypair by access ID."""
|
|
# FIXME(shardy): add filtering for user_id when keystoneclient
|
|
# extensible-crud-manager-operations bp lands
|
|
credentials = self.client.credentials.list()
|
|
for cr in credentials:
|
|
ec2_creds = json.loads(cr.blob)
|
|
if ec2_creds.get('access') == access:
|
|
return AccessKey(id=cr.id,
|
|
access=ec2_creds['access'],
|
|
secret=ec2_creds['secret'])
|
|
|
|
def delete_ec2_keypair(self, credential_id=None, access=None,
|
|
user_id=None):
|
|
"""Delete credential containing ec2 keypair."""
|
|
if credential_id:
|
|
try:
|
|
self.client.credentials.delete(credential_id)
|
|
except kc_exception.NotFound:
|
|
pass
|
|
elif access:
|
|
cred = self._find_ec2_keypair(access=access, user_id=user_id)
|
|
if cred:
|
|
self.client.credentials.delete(cred.id)
|
|
else:
|
|
raise ValueError("Must specify either credential_id or access")
|
|
|
|
def get_ec2_keypair(self, credential_id=None, access=None, user_id=None):
|
|
"""Get an ec2 keypair via v3/credentials, by id or access."""
|
|
# Note v3/credentials does not support filtering by access
|
|
# because it's stored in the credential blob, so we expect
|
|
# all resources to pass credential_id except where backwards
|
|
# compatibility is required (resource only has access stored)
|
|
# then we'll have to do a brute-force lookup locally
|
|
if credential_id:
|
|
cred = self.client.credentials.get(credential_id)
|
|
ec2_creds = json.loads(cred.blob)
|
|
return AccessKey(id=cred.id,
|
|
access=ec2_creds['access'],
|
|
secret=ec2_creds['secret'])
|
|
elif access:
|
|
return self._find_ec2_keypair(access=access, user_id=user_id)
|
|
else:
|
|
raise ValueError("Must specify either credential_id or access")
|
|
|
|
def create_ec2_keypair(self, user_id=None):
|
|
user_id = user_id or self.client.auth_ref.user_id
|
|
project_id = self.context.tenant_id
|
|
data_blob = {'access': uuid.uuid4().hex,
|
|
'secret': uuid.uuid4().hex}
|
|
ec2_creds = self.client.credentials.create(
|
|
user=user_id, type='ec2', data=json.dumps(data_blob),
|
|
project=project_id)
|
|
|
|
# Return a AccessKey namedtuple for easier access to the blob contents
|
|
# We return the id as the v3 api provides no way to filter by
|
|
# access in the blob contents, so it will be much more efficient
|
|
# if we manage credentials by ID instead
|
|
return AccessKey(id=ec2_creds.id,
|
|
access=data_blob['access'],
|
|
secret=data_blob['secret'])
|
|
|
|
def create_stack_domain_user_keypair(self, user_id, project_id):
|
|
if not self.stack_domain:
|
|
# FIXME(shardy): Legacy fallback for folks using old heat.conf
|
|
# files which lack domain configuration
|
|
LOG.warning(_('Falling back to legacy non-domain keypair, '
|
|
'configure domain in heat.conf'))
|
|
return self.create_ec2_keypair(user_id)
|
|
data_blob = {'access': uuid.uuid4().hex,
|
|
'secret': uuid.uuid4().hex}
|
|
creds = self.domain_admin_client.credentials.create(
|
|
user=user_id, type='ec2', data=json.dumps(data_blob),
|
|
project=project_id)
|
|
return AccessKey(id=creds.id,
|
|
access=data_blob['access'],
|
|
secret=data_blob['secret'])
|
|
|
|
def delete_stack_domain_user_keypair(self, user_id, project_id,
|
|
credential_id):
|
|
if not self.stack_domain:
|
|
# FIXME(shardy): Legacy fallback for folks using old heat.conf
|
|
# files which lack domain configuration
|
|
LOG.warning(_('Falling back to legacy non-domain keypair, '
|
|
'configure domain in heat.conf'))
|
|
return self.delete_ec2_keypair(credential_id=credential_id)
|
|
self._check_stack_domain_user(user_id, project_id, 'delete_keypair')
|
|
try:
|
|
self.domain_admin_client.credentials.delete(credential_id)
|
|
except kc_exception.NotFound:
|
|
pass
|
|
|
|
def disable_stack_user(self, user_id):
|
|
self.client.users.update(user=user_id, enabled=False)
|
|
|
|
def enable_stack_user(self, user_id):
|
|
self.client.users.update(user=user_id, enabled=True)
|
|
|
|
def disable_stack_domain_user(self, user_id, project_id):
|
|
if not self.stack_domain:
|
|
# FIXME(shardy): Legacy fallback for folks using old heat.conf
|
|
# files which lack domain configuration
|
|
LOG.warning(_('Falling back to legacy non-domain disable, '
|
|
'configure domain in heat.conf'))
|
|
return self.disable_stack_user(user_id)
|
|
self._check_stack_domain_user(user_id, project_id, 'disable')
|
|
self.domain_admin_client.users.update(user=user_id, enabled=False)
|
|
|
|
def enable_stack_domain_user(self, user_id, project_id):
|
|
if not self.stack_domain:
|
|
# FIXME(shardy): Legacy fallback for folks using old heat.conf
|
|
# files which lack domain configuration
|
|
LOG.warning(_('Falling back to legacy non-domain enable, '
|
|
'configure domain in heat.conf'))
|
|
return self.enable_stack_user(user_id)
|
|
self._check_stack_domain_user(user_id, project_id, 'enable')
|
|
self.domain_admin_client.users.update(user=user_id, enabled=True)
|
|
|
|
def url_for(self, **kwargs):
|
|
default_region_name = cfg.CONF.region_name_for_services
|
|
kwargs.setdefault('region_name', default_region_name)
|
|
return self.client.service_catalog.url_for(**kwargs)
|
|
|
|
@property
|
|
def auth_token(self):
|
|
return self.client.auth_token
|
|
|
|
|
|
class KeystoneClient(object):
|
|
|
|
"""Keystone Auth Client.
|
|
|
|
Delay choosing the backend client module until the client's class
|
|
needs to be initialized.
|
|
"""
|
|
|
|
def __new__(cls, context):
|
|
if cfg.CONF.keystone_backend == _default_keystone_backend:
|
|
return KeystoneClientV3(context)
|
|
else:
|
|
return importutils.import_object(
|
|
cfg.CONF.keystone_backend,
|
|
context
|
|
)
|