295 lines
10 KiB
Python
295 lines
10 KiB
Python
# 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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from urllib import parse as urlparse
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from oslo_log import log as logging
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from oslo_utils import versionutils
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from sqlalchemy.sql.expression import asc
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from sqlalchemy.sql import false
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from sqlalchemy.sql import true
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import nova.conf
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from nova.db.sqlalchemy import api as db_api
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from nova.db.sqlalchemy import api_models
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from nova import exception
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from nova.objects import base
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from nova.objects import fields
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CONF = nova.conf.CONF
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LOG = logging.getLogger(__name__)
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def _parse_netloc(netloc):
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"""Parse a user:pass@host:port and return a dict suitable for formatting
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a cell mapping template.
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"""
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these = {
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'username': None,
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'password': None,
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'hostname': None,
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'port': None,
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}
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if '@' in netloc:
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userpass, hostport = netloc.split('@', 1)
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else:
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hostport = netloc
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userpass = ''
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if hostport.startswith('['):
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host_end = hostport.find(']')
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if host_end < 0:
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raise ValueError('Invalid IPv6 URL')
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these['hostname'] = hostport[1:host_end]
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these['port'] = hostport[host_end + 1:]
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elif ':' in hostport:
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these['hostname'], these['port'] = hostport.split(':', 1)
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else:
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these['hostname'] = hostport
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if ':' in userpass:
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these['username'], these['password'] = userpass.split(':', 1)
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else:
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these['username'] = userpass
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return these
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@base.NovaObjectRegistry.register
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class CellMapping(base.NovaTimestampObject, base.NovaObject):
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# Version 1.0: Initial version
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# Version 1.1: Added disabled field
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VERSION = '1.1'
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CELL0_UUID = '00000000-0000-0000-0000-000000000000'
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fields = {
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'id': fields.IntegerField(read_only=True),
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'uuid': fields.UUIDField(),
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'name': fields.StringField(nullable=True),
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'transport_url': fields.StringField(),
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'database_connection': fields.StringField(),
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'disabled': fields.BooleanField(default=False),
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}
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def obj_make_compatible(self, primitive, target_version):
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super(CellMapping, self).obj_make_compatible(primitive, target_version)
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target_version = versionutils.convert_version_to_tuple(target_version)
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if target_version < (1, 1):
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if 'disabled' in primitive:
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del primitive['disabled']
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@property
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def identity(self):
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if 'name' in self and self.name:
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return '%s(%s)' % (self.uuid, self.name)
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else:
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return self.uuid
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@staticmethod
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def _format_url(url, default):
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default_url = urlparse.urlparse(default)
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subs = {
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'username': default_url.username,
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'password': default_url.password,
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'hostname': default_url.hostname,
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'port': default_url.port,
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'scheme': default_url.scheme,
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'query': default_url.query,
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'fragment': default_url.fragment,
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'path': default_url.path.lstrip('/'),
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}
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# NOTE(danms): oslo.messaging has an extended format for the URL
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# which we need to support:
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# scheme://user:pass@host:port[,user1:pass@host1:port, ...]/path
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# Encode these values, if they exist, as indexed keys like
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# username1, password1, hostname1, port1.
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if ',' in default_url.netloc:
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netlocs = default_url.netloc.split(',')
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index = 0
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for netloc in netlocs:
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index += 1
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these = _parse_netloc(netloc)
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for key in these:
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subs['%s%i' % (key, index)] = these[key]
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return url.format(**subs)
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@staticmethod
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def format_db_url(url):
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if CONF.database.connection is None:
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if '{' in url:
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LOG.error('Cell mapping database_connection is a template, '
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'but [database]/connection is not set')
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return url
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try:
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return CellMapping._format_url(url, CONF.database.connection)
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except Exception:
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LOG.exception('Failed to parse [database]/connection to '
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'format cell mapping')
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return url
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@staticmethod
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def format_mq_url(url):
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if CONF.transport_url is None:
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if '{' in url:
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LOG.error('Cell mapping transport_url is a template, but '
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'[DEFAULT]/transport_url is not set')
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return url
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try:
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return CellMapping._format_url(url, CONF.transport_url)
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except Exception:
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LOG.exception('Failed to parse [DEFAULT]/transport_url to '
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'format cell mapping')
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return url
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@staticmethod
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def _from_db_object(context, cell_mapping, db_cell_mapping):
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for key in cell_mapping.fields:
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val = db_cell_mapping[key]
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if key == 'database_connection':
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val = cell_mapping.format_db_url(val)
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elif key == 'transport_url':
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val = cell_mapping.format_mq_url(val)
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setattr(cell_mapping, key, val)
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cell_mapping.obj_reset_changes()
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cell_mapping._context = context
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return cell_mapping
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_by_uuid_from_db(context, uuid):
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db_mapping = context.session.query(api_models.CellMapping).filter_by(
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uuid=uuid).first()
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if not db_mapping:
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raise exception.CellMappingNotFound(uuid=uuid)
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return db_mapping
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@base.remotable_classmethod
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def get_by_uuid(cls, context, uuid):
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db_mapping = cls._get_by_uuid_from_db(context, uuid)
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return cls._from_db_object(context, cls(), db_mapping)
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@staticmethod
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@db_api.api_context_manager.writer
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def _create_in_db(context, updates):
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db_mapping = api_models.CellMapping()
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db_mapping.update(updates)
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db_mapping.save(context.session)
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return db_mapping
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@base.remotable
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def create(self):
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db_mapping = self._create_in_db(self._context, self.obj_get_changes())
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self._from_db_object(self._context, self, db_mapping)
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@staticmethod
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@db_api.api_context_manager.writer
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def _save_in_db(context, uuid, updates):
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db_mapping = context.session.query(
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api_models.CellMapping).filter_by(uuid=uuid).first()
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if not db_mapping:
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raise exception.CellMappingNotFound(uuid=uuid)
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db_mapping.update(updates)
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context.session.add(db_mapping)
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return db_mapping
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@base.remotable
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def save(self):
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changes = self.obj_get_changes()
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db_mapping = self._save_in_db(self._context, self.uuid, changes)
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self._from_db_object(self._context, self, db_mapping)
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self.obj_reset_changes()
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@staticmethod
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@db_api.api_context_manager.writer
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def _destroy_in_db(context, uuid):
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result = context.session.query(api_models.CellMapping).filter_by(
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uuid=uuid).delete()
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if not result:
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raise exception.CellMappingNotFound(uuid=uuid)
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@base.remotable
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def destroy(self):
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self._destroy_in_db(self._context, self.uuid)
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def is_cell0(self):
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return self.obj_attr_is_set('uuid') and self.uuid == self.CELL0_UUID
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@base.NovaObjectRegistry.register
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class CellMappingList(base.ObjectListBase, base.NovaObject):
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# Version 1.0: Initial version
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# Version 1.1: Add get_by_disabled()
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VERSION = '1.1'
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fields = {
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'objects': fields.ListOfObjectsField('CellMapping'),
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}
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_all_from_db(context):
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return context.session.query(api_models.CellMapping).order_by(
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asc(api_models.CellMapping.id)).all()
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@base.remotable_classmethod
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def get_all(cls, context):
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db_mappings = cls._get_all_from_db(context)
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return base.obj_make_list(context, cls(), CellMapping, db_mappings)
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_by_disabled_from_db(context, disabled):
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if disabled:
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return context.session.query(api_models.CellMapping).filter_by(
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disabled=true()).order_by(asc(api_models.CellMapping.id)).all()
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else:
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return context.session.query(api_models.CellMapping).filter_by(
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disabled=false()).order_by(asc(
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api_models.CellMapping.id)).all()
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@base.remotable_classmethod
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def get_by_disabled(cls, context, disabled):
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db_mappings = cls._get_by_disabled_from_db(context, disabled)
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return base.obj_make_list(context, cls(), CellMapping, db_mappings)
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@staticmethod
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@db_api.api_context_manager.reader
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def _get_by_project_id_from_db(context, project_id):
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# SELECT DISTINCT cell_id FROM instance_mappings \
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# WHERE project_id = $project_id;
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cell_ids = context.session.query(
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api_models.InstanceMapping.cell_id).filter_by(
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project_id=project_id).distinct().subquery()
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# SELECT cell_mappings WHERE cell_id IN ($cell_ids);
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return context.session.query(api_models.CellMapping).filter(
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api_models.CellMapping.id.in_(cell_ids)).all()
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@classmethod
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def get_by_project_id(cls, context, project_id):
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"""Return a list of CellMapping objects which correspond to cells in
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which project_id has InstanceMappings.
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"""
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db_mappings = cls._get_by_project_id_from_db(context, project_id)
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return base.obj_make_list(context, cls(), CellMapping, db_mappings)
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