diff options
Diffstat (limited to 'keystone-moon/keystone/catalog/backends/sql.py')
| -rw-r--r-- | keystone-moon/keystone/catalog/backends/sql.py | 337 |
1 files changed, 337 insertions, 0 deletions
diff --git a/keystone-moon/keystone/catalog/backends/sql.py b/keystone-moon/keystone/catalog/backends/sql.py new file mode 100644 index 00000000..8ab82305 --- /dev/null +++ b/keystone-moon/keystone/catalog/backends/sql.py @@ -0,0 +1,337 @@ +# Copyright 2012 OpenStack Foundation +# Copyright 2012 Canonical Ltd. +# +# 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. + +import itertools + +from oslo_config import cfg +import six +import sqlalchemy +from sqlalchemy.sql import true + +from keystone import catalog +from keystone.catalog import core +from keystone.common import sql +from keystone import exception + + +CONF = cfg.CONF + + +class Region(sql.ModelBase, sql.DictBase): + __tablename__ = 'region' + attributes = ['id', 'description', 'parent_region_id'] + id = sql.Column(sql.String(255), primary_key=True) + description = sql.Column(sql.String(255), nullable=False) + # NOTE(jaypipes): Right now, using an adjacency list model for + # storing the hierarchy of regions is fine, since + # the API does not support any kind of querying for + # more complex hierarchical queries such as "get me only + # the regions that are subchildren of this region", etc. + # If, in the future, such queries are needed, then it + # would be possible to add in columns to this model for + # "left" and "right" and provide support for a nested set + # model. + parent_region_id = sql.Column(sql.String(255), nullable=True) + + # TODO(jaypipes): I think it's absolutely stupid that every single model + # is required to have an "extra" column because of the + # DictBase in the keystone.common.sql.core module. Forcing + # tables to have pointless columns in the database is just + # bad. Remove all of this extra JSON blob stuff. + # See: https://bugs.launchpad.net/keystone/+bug/1265071 + extra = sql.Column(sql.JsonBlob()) + endpoints = sqlalchemy.orm.relationship("Endpoint", backref="region") + + +class Service(sql.ModelBase, sql.DictBase): + __tablename__ = 'service' + attributes = ['id', 'type', 'enabled'] + id = sql.Column(sql.String(64), primary_key=True) + type = sql.Column(sql.String(255)) + enabled = sql.Column(sql.Boolean, nullable=False, default=True, + server_default=sqlalchemy.sql.expression.true()) + extra = sql.Column(sql.JsonBlob()) + endpoints = sqlalchemy.orm.relationship("Endpoint", backref="service") + + +class Endpoint(sql.ModelBase, sql.DictBase): + __tablename__ = 'endpoint' + attributes = ['id', 'interface', 'region_id', 'service_id', 'url', + 'legacy_endpoint_id', 'enabled'] + id = sql.Column(sql.String(64), primary_key=True) + legacy_endpoint_id = sql.Column(sql.String(64)) + interface = sql.Column(sql.String(8), nullable=False) + region_id = sql.Column(sql.String(255), + sql.ForeignKey('region.id', + ondelete='RESTRICT'), + nullable=True, + default=None) + service_id = sql.Column(sql.String(64), + sql.ForeignKey('service.id'), + nullable=False) + url = sql.Column(sql.Text(), nullable=False) + enabled = sql.Column(sql.Boolean, nullable=False, default=True, + server_default=sqlalchemy.sql.expression.true()) + extra = sql.Column(sql.JsonBlob()) + + +class Catalog(catalog.Driver): + # Regions + def list_regions(self, hints): + session = sql.get_session() + regions = session.query(Region) + regions = sql.filter_limit_query(Region, regions, hints) + return [s.to_dict() for s in list(regions)] + + def _get_region(self, session, region_id): + ref = session.query(Region).get(region_id) + if not ref: + raise exception.RegionNotFound(region_id=region_id) + return ref + + def _delete_child_regions(self, session, region_id, root_region_id): + """Delete all child regions. + + Recursively delete any region that has the supplied region + as its parent. + """ + children = session.query(Region).filter_by(parent_region_id=region_id) + for child in children: + if child.id == root_region_id: + # Hit a circular region hierarchy + return + self._delete_child_regions(session, child.id, root_region_id) + session.delete(child) + + def _check_parent_region(self, session, region_ref): + """Raise a NotFound if the parent region does not exist. + + If the region_ref has a specified parent_region_id, check that + the parent exists, otherwise, raise a NotFound. + """ + parent_region_id = region_ref.get('parent_region_id') + if parent_region_id is not None: + # This will raise NotFound if the parent doesn't exist, + # which is the behavior we want. + self._get_region(session, parent_region_id) + + def _has_endpoints(self, session, region, root_region): + if region.endpoints is not None and len(region.endpoints) > 0: + return True + + q = session.query(Region) + q = q.filter_by(parent_region_id=region.id) + for child in q.all(): + if child.id == root_region.id: + # Hit a circular region hierarchy + return False + if self._has_endpoints(session, child, root_region): + return True + return False + + def get_region(self, region_id): + session = sql.get_session() + return self._get_region(session, region_id).to_dict() + + def delete_region(self, region_id): + session = sql.get_session() + with session.begin(): + ref = self._get_region(session, region_id) + if self._has_endpoints(session, ref, ref): + raise exception.RegionDeletionError(region_id=region_id) + self._delete_child_regions(session, region_id, region_id) + session.delete(ref) + + @sql.handle_conflicts(conflict_type='region') + def create_region(self, region_ref): + session = sql.get_session() + with session.begin(): + self._check_parent_region(session, region_ref) + region = Region.from_dict(region_ref) + session.add(region) + return region.to_dict() + + def update_region(self, region_id, region_ref): + session = sql.get_session() + with session.begin(): + self._check_parent_region(session, region_ref) + ref = self._get_region(session, region_id) + old_dict = ref.to_dict() + old_dict.update(region_ref) + self._ensure_no_circle_in_hierarchical_regions(old_dict) + new_region = Region.from_dict(old_dict) + for attr in Region.attributes: + if attr != 'id': + setattr(ref, attr, getattr(new_region, attr)) + return ref.to_dict() + + # Services + @sql.truncated + def list_services(self, hints): + session = sql.get_session() + services = session.query(Service) + services = sql.filter_limit_query(Service, services, hints) + return [s.to_dict() for s in list(services)] + + def _get_service(self, session, service_id): + ref = session.query(Service).get(service_id) + if not ref: + raise exception.ServiceNotFound(service_id=service_id) + return ref + + def get_service(self, service_id): + session = sql.get_session() + return self._get_service(session, service_id).to_dict() + + def delete_service(self, service_id): + session = sql.get_session() + with session.begin(): + ref = self._get_service(session, service_id) + session.query(Endpoint).filter_by(service_id=service_id).delete() + session.delete(ref) + + def create_service(self, service_id, service_ref): + session = sql.get_session() + with session.begin(): + service = Service.from_dict(service_ref) + session.add(service) + return service.to_dict() + + def update_service(self, service_id, service_ref): + session = sql.get_session() + with session.begin(): + ref = self._get_service(session, service_id) + old_dict = ref.to_dict() + old_dict.update(service_ref) + new_service = Service.from_dict(old_dict) + for attr in Service.attributes: + if attr != 'id': + setattr(ref, attr, getattr(new_service, attr)) + ref.extra = new_service.extra + return ref.to_dict() + + # Endpoints + def create_endpoint(self, endpoint_id, endpoint_ref): + session = sql.get_session() + new_endpoint = Endpoint.from_dict(endpoint_ref) + + with session.begin(): + session.add(new_endpoint) + return new_endpoint.to_dict() + + def delete_endpoint(self, endpoint_id): + session = sql.get_session() + with session.begin(): + ref = self._get_endpoint(session, endpoint_id) + session.delete(ref) + + def _get_endpoint(self, session, endpoint_id): + try: + return session.query(Endpoint).filter_by(id=endpoint_id).one() + except sql.NotFound: + raise exception.EndpointNotFound(endpoint_id=endpoint_id) + + def get_endpoint(self, endpoint_id): + session = sql.get_session() + return self._get_endpoint(session, endpoint_id).to_dict() + + @sql.truncated + def list_endpoints(self, hints): + session = sql.get_session() + endpoints = session.query(Endpoint) + endpoints = sql.filter_limit_query(Endpoint, endpoints, hints) + return [e.to_dict() for e in list(endpoints)] + + def update_endpoint(self, endpoint_id, endpoint_ref): + session = sql.get_session() + + with session.begin(): + ref = self._get_endpoint(session, endpoint_id) + old_dict = ref.to_dict() + old_dict.update(endpoint_ref) + new_endpoint = Endpoint.from_dict(old_dict) + for attr in Endpoint.attributes: + if attr != 'id': + setattr(ref, attr, getattr(new_endpoint, attr)) + ref.extra = new_endpoint.extra + return ref.to_dict() + + def get_catalog(self, user_id, tenant_id): + substitutions = dict( + itertools.chain(six.iteritems(CONF), + six.iteritems(CONF.eventlet_server))) + substitutions.update({'tenant_id': tenant_id, 'user_id': user_id}) + + session = sql.get_session() + endpoints = (session.query(Endpoint). + options(sql.joinedload(Endpoint.service)). + filter(Endpoint.enabled == true()).all()) + + catalog = {} + + for endpoint in endpoints: + if not endpoint.service['enabled']: + continue + try: + url = core.format_url(endpoint['url'], substitutions) + except exception.MalformedEndpoint: + continue # this failure is already logged in format_url() + + region = endpoint['region_id'] + service_type = endpoint.service['type'] + default_service = { + 'id': endpoint['id'], + 'name': endpoint.service.extra.get('name', ''), + 'publicURL': '' + } + catalog.setdefault(region, {}) + catalog[region].setdefault(service_type, default_service) + interface_url = '%sURL' % endpoint['interface'] + catalog[region][service_type][interface_url] = url + + return catalog + + def get_v3_catalog(self, user_id, tenant_id): + d = dict( + itertools.chain(six.iteritems(CONF), + six.iteritems(CONF.eventlet_server))) + d.update({'tenant_id': tenant_id, + 'user_id': user_id}) + + session = sql.get_session() + services = (session.query(Service).filter(Service.enabled == true()). + options(sql.joinedload(Service.endpoints)). + all()) + + def make_v3_endpoints(endpoints): + for endpoint in (ep.to_dict() for ep in endpoints if ep.enabled): + del endpoint['service_id'] + del endpoint['legacy_endpoint_id'] + del endpoint['enabled'] + endpoint['region'] = endpoint['region_id'] + try: + endpoint['url'] = core.format_url(endpoint['url'], d) + except exception.MalformedEndpoint: + continue # this failure is already logged in format_url() + + yield endpoint + + def make_v3_service(svc): + eps = list(make_v3_endpoints(svc.endpoints)) + service = {'endpoints': eps, 'id': svc.id, 'type': svc.type} + service['name'] = svc.extra.get('name', '') + return service + + return [make_v3_service(svc) for svc in services] |