Chris Dent
def4b17934
nova/db/__init__.py was importing * from nova.db.api. This meant that any time any code anywhere within the nova.db package was imported then nova.db.api was too, leading to a cascade of imports that may not have been desired. Also, in general, code in __init__.py is a pain. Therefore, this change adjusts code that so that either: * nova.db.api is used directly * nova.db.api is imported as 'db' In either case, the functionality remains the same. The primary goal of this change was to make it possible to import the model files without having to import the db api. Moving the model files to a different place in the directory hierarchy was considered, but given that "code in __init__.py is a pain" this mode was chosen. This looks like a very large change, but it is essentially adjusting package names, many in mocks. Change-Id: Ic1fd7c87ceda05eeb96735da2a415ef37060bb1a
230 lines
9.2 KiB
Python
230 lines
9.2 KiB
Python
# Copyright 2014 Red Hat, Inc.
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#
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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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import netaddr
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from oslo_utils import versionutils
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import nova.conf
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from nova.db import api as db
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from nova import exception
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from nova.i18n import _
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from nova import objects
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from nova.objects import base as obj_base
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from nova.objects import fields
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CONF = nova.conf.CONF
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# TODO(berrange): Remove NovaObjectDictCompat
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@obj_base.NovaObjectRegistry.register
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class Network(obj_base.NovaPersistentObject, obj_base.NovaObject,
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obj_base.NovaObjectDictCompat):
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# Version 1.0: Initial version
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# Version 1.1: Added in_use_on_host()
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# Version 1.2: Added mtu, dhcp_server, enable_dhcp, share_address
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VERSION = '1.2'
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fields = {
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'id': fields.IntegerField(),
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'label': fields.StringField(),
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'injected': fields.BooleanField(),
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'cidr': fields.IPV4NetworkField(nullable=True),
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'cidr_v6': fields.IPV6NetworkField(nullable=True),
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'multi_host': fields.BooleanField(),
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'netmask': fields.IPV4AddressField(nullable=True),
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'gateway': fields.IPV4AddressField(nullable=True),
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'broadcast': fields.IPV4AddressField(nullable=True),
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'netmask_v6': fields.IPV6AddressField(nullable=True),
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'gateway_v6': fields.IPV6AddressField(nullable=True),
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'bridge': fields.StringField(nullable=True),
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'bridge_interface': fields.StringField(nullable=True),
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'dns1': fields.IPAddressField(nullable=True),
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'dns2': fields.IPAddressField(nullable=True),
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'vlan': fields.IntegerField(nullable=True),
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'vpn_public_address': fields.IPAddressField(nullable=True),
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'vpn_public_port': fields.IntegerField(nullable=True),
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'vpn_private_address': fields.IPAddressField(nullable=True),
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'dhcp_start': fields.IPV4AddressField(nullable=True),
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'rxtx_base': fields.IntegerField(nullable=True),
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'project_id': fields.UUIDField(nullable=True),
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'priority': fields.IntegerField(nullable=True),
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'host': fields.StringField(nullable=True),
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'uuid': fields.UUIDField(),
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'mtu': fields.IntegerField(nullable=True),
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'dhcp_server': fields.IPAddressField(nullable=True),
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'enable_dhcp': fields.BooleanField(),
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'share_address': fields.BooleanField(),
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}
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@staticmethod
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def _convert_legacy_ipv6_netmask(netmask):
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"""Handle netmask_v6 possibilities from the database.
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Historically, this was stored as just an integral CIDR prefix,
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but in the future it should be stored as an actual netmask.
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Be tolerant of either here.
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"""
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try:
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prefix = int(netmask)
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return netaddr.IPNetwork('1::/%i' % prefix).netmask
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except ValueError:
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pass
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try:
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return netaddr.IPNetwork(netmask).netmask
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except netaddr.AddrFormatError:
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raise ValueError(_('IPv6 netmask "%s" must be a netmask '
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'or integral prefix') % netmask)
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def obj_make_compatible(self, primitive, target_version):
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target_version = versionutils.convert_version_to_tuple(target_version)
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if target_version < (1, 2):
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if 'mtu' in primitive:
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del primitive['mtu']
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if 'enable_dhcp' in primitive:
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del primitive['enable_dhcp']
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if 'dhcp_server' in primitive:
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del primitive['dhcp_server']
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if 'share_address' in primitive:
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del primitive['share_address']
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@staticmethod
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def _from_db_object(context, network, db_network):
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for field in network.fields:
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db_value = db_network[field]
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if field is 'netmask_v6' and db_value is not None:
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db_value = network._convert_legacy_ipv6_netmask(db_value)
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if field is 'dhcp_server' and db_value is None:
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db_value = db_network['gateway']
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if field is 'share_address' and CONF.share_dhcp_address:
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db_value = CONF.share_dhcp_address
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network[field] = db_value
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network._context = context
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network.obj_reset_changes()
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return network
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@obj_base.remotable_classmethod
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def get_by_id(cls, context, network_id, project_only='allow_none'):
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db_network = db.network_get(context, network_id,
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project_only=project_only)
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return cls._from_db_object(context, cls(), db_network)
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@obj_base.remotable_classmethod
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def get_by_uuid(cls, context, network_uuid):
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db_network = db.network_get_by_uuid(context, network_uuid)
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return cls._from_db_object(context, cls(), db_network)
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@obj_base.remotable_classmethod
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def get_by_cidr(cls, context, cidr):
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db_network = db.network_get_by_cidr(context, cidr)
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return cls._from_db_object(context, cls(), db_network)
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@obj_base.remotable_classmethod
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def associate(cls, context, project_id, network_id=None, force=False):
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db.network_associate(context, project_id, network_id=network_id,
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force=force)
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@obj_base.remotable_classmethod
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def disassociate(cls, context, network_id, host=False, project=False):
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db.network_disassociate(context, network_id, host, project)
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@obj_base.remotable_classmethod
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def in_use_on_host(cls, context, network_id, host):
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return db.network_in_use_on_host(context, network_id, host)
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def _get_primitive_changes(self):
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changes = {}
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for key, value in self.obj_get_changes().items():
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if isinstance(value, netaddr.IPAddress):
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changes[key] = str(value)
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else:
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changes[key] = value
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return changes
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@obj_base.remotable
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def create(self):
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updates = self._get_primitive_changes()
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if 'id' in updates:
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raise exception.ObjectActionError(action='create',
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reason='already created')
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db_network = db.network_create_safe(self._context, updates)
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self._from_db_object(self._context, self, db_network)
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@obj_base.remotable
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def destroy(self):
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db.network_delete_safe(self._context, self.id)
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self.deleted = True
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self.obj_reset_changes(['deleted'])
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@obj_base.remotable
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def save(self):
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context = self._context
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updates = self._get_primitive_changes()
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if 'netmask_v6' in updates:
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# NOTE(danms): For some reason, historical code stores the
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# IPv6 netmask as just the CIDR mask length, so convert that
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# back here before saving for now.
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updates['netmask_v6'] = netaddr.IPNetwork(
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updates['netmask_v6']).netmask
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set_host = 'host' in updates
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if set_host:
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db.network_set_host(context, self.id, updates.pop('host'))
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if updates:
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db_network = db.network_update(context, self.id, updates)
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elif set_host:
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db_network = db.network_get(context, self.id)
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else:
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db_network = None
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if db_network is not None:
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self._from_db_object(context, self, db_network)
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@obj_base.NovaObjectRegistry.register
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class NetworkList(obj_base.ObjectListBase, obj_base.NovaObject):
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# Version 1.0: Initial version
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# Version 1.1: Added get_by_project()
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# Version 1.2: Network <= version 1.2
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VERSION = '1.2'
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fields = {
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'objects': fields.ListOfObjectsField('Network'),
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}
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@obj_base.remotable_classmethod
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def get_all(cls, context, project_only='allow_none'):
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db_networks = db.network_get_all(context, project_only)
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return obj_base.obj_make_list(context, cls(context), objects.Network,
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db_networks)
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@obj_base.remotable_classmethod
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def get_by_uuids(cls, context, network_uuids, project_only='allow_none'):
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db_networks = db.network_get_all_by_uuids(context, network_uuids,
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project_only)
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return obj_base.obj_make_list(context, cls(context), objects.Network,
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db_networks)
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@obj_base.remotable_classmethod
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def get_by_host(cls, context, host):
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db_networks = db.network_get_all_by_host(context, host)
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return obj_base.obj_make_list(context, cls(context), objects.Network,
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db_networks)
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@obj_base.remotable_classmethod
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def get_by_project(cls, context, project_id, associate=True):
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db_networks = db.project_get_networks(context, project_id,
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associate=associate)
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return obj_base.obj_make_list(context, cls(context), objects.Network,
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db_networks)
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