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OpenStack Study: network.py**** CubicPower OpenStack Study ****
# Copyright 2014 Red Hat, Inc. # # 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 netaddr from nova import db from nova import exception from nova.objects import base as obj_base from nova.objects import fields
**** CubicPower OpenStack Study **** class Network(obj_base.NovaPersistentObject, obj_base.NovaObject): # Version 1.0: Initial version # Version 1.1: Added in_use_on_host() VERSION = '1.1' fields = { 'id': fields.IntegerField(), 'label': fields.StringField(), 'injected': fields.BooleanField(), 'cidr': fields.IPV4NetworkField(nullable=True), 'cidr_v6': fields.IPV6NetworkField(nullable=True), 'multi_host': fields.BooleanField(), 'netmask': fields.IPV4AddressField(nullable=True), 'gateway': fields.IPV4AddressField(nullable=True), 'broadcast': fields.IPV4AddressField(nullable=True), 'netmask_v6': fields.IPV6AddressField(nullable=True), 'gateway_v6': fields.IPV6AddressField(nullable=True), 'bridge': fields.StringField(nullable=True), 'bridge_interface': fields.StringField(nullable=True), 'dns1': fields.IPAddressField(nullable=True), 'dns2': fields.IPAddressField(nullable=True), 'vlan': fields.IntegerField(nullable=True), 'vpn_public_address': fields.IPAddressField(nullable=True), 'vpn_public_port': fields.IntegerField(nullable=True), 'vpn_private_address': fields.IPAddressField(nullable=True), 'dhcp_start': fields.IPV4AddressField(nullable=True), 'rxtx_base': fields.IntegerField(nullable=True), 'project_id': fields.UUIDField(nullable=True), 'priority': fields.IntegerField(nullable=True), 'host': fields.StringField(nullable=True), 'uuid': fields.UUIDField(), } @staticmethod
**** CubicPower OpenStack Study **** def _convert_legacy_ipv6_netmask(netmask): """Handle netmask_v6 possibilities from the database. Historically, this was stored as just an integral CIDR prefix, but in the future it should be stored as an actual netmask. Be tolerant of either here. """ try: prefix = int(netmask) return netaddr.IPNetwork('1::/%i' % prefix).netmask except ValueError: pass try: return netaddr.IPNetwork(netmask).netmask except netaddr.AddrFormatError: raise ValueError('IPv6 netmask "%s" must be a netmask ' 'or integral prefix' % netmask) @staticmethod
**** CubicPower OpenStack Study **** def _from_db_object(context, network, db_network): for field in network.fields: db_value = db_network[field] if field is 'netmask_v6' and db_value is not None: db_value = network._convert_legacy_ipv6_netmask(db_value) network[field] = db_value network._context = context network.obj_reset_changes() return network @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_by_id(cls, context, network_id, project_only='allow_none'): db_network = db.network_get(context, network_id, project_only=project_only) return cls._from_db_object(context, cls(), db_network) @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_by_uuid(cls, context, network_uuid): db_network = db.network_get_by_uuid(context, network_uuid) return cls._from_db_object(context, cls(), db_network) @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_by_cidr(cls, context, cidr): db_network = db.network_get_by_cidr(context, cidr) return cls._from_db_object(context, cls(), db_network) @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def associate(cls, context, project_id, network_id=None, force=False): db.network_associate(context, project_id, network_id=network_id, force=force) @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def disassociate(cls, context, network_id, host=False, project=False): db.network_disassociate(context, network_id, host, project) @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def in_use_on_host(cls, context, network_id, host): return db.network_in_use_on_host(context, network_id, host)
**** CubicPower OpenStack Study **** def _get_primitive_changes(self): changes = {} for key, value in self.obj_get_changes().items(): if isinstance(value, netaddr.IPAddress): changes[key] = str(value) else: changes[key] = value return changes @obj_base.remotable
**** CubicPower OpenStack Study **** def create(self, context): updates = self._get_primitive_changes() if 'id' in updates: raise exception.ObjectActionError(action='create', reason='already created') db_network = db.network_create_safe(context, updates) self._from_db_object(context, self, db_network) @obj_base.remotable
**** CubicPower OpenStack Study **** def destroy(self, context): db.network_delete_safe(context, self.id) self.deleted = True self.obj_reset_changes(['deleted']) @obj_base.remotable
**** CubicPower OpenStack Study **** def save(self, context): updates = self._get_primitive_changes() if 'netmask_v6' in updates: # NOTE(danms): For some reason, historical code stores the # IPv6 netmask as just the CIDR mask length, so convert that # back here before saving for now. updates['netmask_v6'] = netaddr.IPNetwork( updates['netmask_v6']).netmask set_host = 'host' in updates if set_host: db.network_set_host(context, self.id, updates.pop('host')) if updates: db_network = db.network_update(context, self.id, updates) elif set_host: db_network = db.network_get(context, self.id) else: db_network = None if db_network is not None: self._from_db_object(context, self, db_network)
**** CubicPower OpenStack Study **** class NetworkList(obj_base.ObjectListBase, obj_base.NovaObject): # Version 1.0: Initial version # Version 1.1: Added get_by_project() VERSION = '1.1' fields = { 'objects': fields.ListOfObjectsField('Network'), } child_versions = { '1.0': '1.0', '1.1': '1.1', } @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_all(cls, context, project_only='allow_none'): db_networks = db.network_get_all(context, project_only) return obj_base.obj_make_list(context, cls(), Network, db_networks) @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_by_uuids(cls, context, network_uuids, project_only='allow_none'): db_networks = db.network_get_all_by_uuids(context, network_uuids, project_only) return obj_base.obj_make_list(context, cls(), Network, db_networks) @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_by_host(cls, context, host): db_networks = db.network_get_all_by_host(context, host) return obj_base.obj_make_list(context, cls(), Network, db_networks) @obj_base.remotable_classmethod
**** CubicPower OpenStack Study **** def get_by_project(cls, context, project_id, associate=True): db_networks = db.project_get_networks(context, project_id, associate=associate) return obj_base.obj_make_list(context, cls(), Network, db_networks)
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