9ba07fdf9f
This patch series adds the ability for a user to specify a tag to be applied to a network interface or a disk when booting an instance. This tag is then exposed through the metadata API. For example, a user boots a VM with two network interfaces. One is connected to a private network, the other to the public Internet. There is currently no direct way to tell which interface is which. Specifying tags allows the user to distinguish between the two interfaces. This patch contains the database migration to add a 'tag' column to the virtual_interfaces and block_device_mapping tables as well as the corresponding change to the VirtualInterface and BlockDeviceMapping objects. Implements: blueprint virt-device-role-tagging Co-authored-by: Vladik Romanovsky <vromanso@redhat.com> Change-Id: Ic8be3de4e970116772f9b6ce01c55e26b829e6cb
117 lines
4.3 KiB
Python
117 lines
4.3 KiB
Python
# Copyright (C) 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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from oslo_utils import versionutils
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from nova import db
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from nova import exception
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from nova import objects
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from nova.objects import base
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from nova.objects import fields
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@base.NovaObjectRegistry.register
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class VirtualInterface(base.NovaPersistentObject, base.NovaObject):
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# Version 1.0: Initial version
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# Version 1.1: Add tag field
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VERSION = '1.1'
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fields = {
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'id': fields.IntegerField(),
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'address': fields.StringField(nullable=True),
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'network_id': fields.IntegerField(),
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'instance_uuid': fields.UUIDField(),
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'uuid': fields.UUIDField(),
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'tag': fields.StringField(nullable=True),
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}
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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, 1) and 'tag' in primitive:
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del primitive['tag']
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@staticmethod
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def _from_db_object(context, vif, db_vif):
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for field in vif.fields:
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setattr(vif, field, db_vif[field])
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vif._context = context
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vif.obj_reset_changes()
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return vif
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@base.remotable_classmethod
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def get_by_id(cls, context, vif_id):
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db_vif = db.virtual_interface_get(context, vif_id)
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if db_vif:
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return cls._from_db_object(context, cls(), db_vif)
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@base.remotable_classmethod
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def get_by_uuid(cls, context, vif_uuid):
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db_vif = db.virtual_interface_get_by_uuid(context, vif_uuid)
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if db_vif:
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return cls._from_db_object(context, cls(), db_vif)
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@base.remotable_classmethod
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def get_by_address(cls, context, address):
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db_vif = db.virtual_interface_get_by_address(context, address)
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if db_vif:
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return cls._from_db_object(context, cls(), db_vif)
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@base.remotable_classmethod
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def get_by_instance_and_network(cls, context, instance_uuid, network_id):
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db_vif = db.virtual_interface_get_by_instance_and_network(context,
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instance_uuid, network_id)
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if db_vif:
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return cls._from_db_object(context, cls(), db_vif)
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@base.remotable
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def create(self):
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if self.obj_attr_is_set('id'):
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raise exception.ObjectActionError(action='create',
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reason='already created')
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updates = self.obj_get_changes()
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db_vif = db.virtual_interface_create(self._context, updates)
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self._from_db_object(self._context, self, db_vif)
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@base.remotable_classmethod
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def delete_by_instance_uuid(cls, context, instance_uuid):
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db.virtual_interface_delete_by_instance(context, instance_uuid)
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@base.NovaObjectRegistry.register
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class VirtualInterfaceList(base.ObjectListBase, base.NovaObject):
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# Version 1.0: Initial version
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VERSION = '1.0'
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fields = {
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'objects': fields.ListOfObjectsField('VirtualInterface'),
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}
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@base.remotable_classmethod
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def get_all(cls, context):
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db_vifs = db.virtual_interface_get_all(context)
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return base.obj_make_list(context, cls(context),
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objects.VirtualInterface, db_vifs)
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@staticmethod
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@db.select_db_reader_mode
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def _db_virtual_interface_get_by_instance(context, instance_uuid,
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use_slave=False):
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return db.virtual_interface_get_by_instance(context, instance_uuid)
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@base.remotable_classmethod
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def get_by_instance_uuid(cls, context, instance_uuid, use_slave=False):
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db_vifs = cls._db_virtual_interface_get_by_instance(
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context, instance_uuid, use_slave=use_slave)
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return base.obj_make_list(context, cls(context),
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objects.VirtualInterface, db_vifs)
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