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OpenStack Study: nova_ipam_lib.py**** CubicPower OpenStack Study ****
# Copyright 2011 Nicira Networks, Inc # All Rights Reserved. # # 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 ipv6 from nova.objects import fixed_ip as fixed_ip_obj from nova.objects import floating_ip as floating_ip_obj from nova.objects import network as network_obj from nova.objects import virtual_interface as vif_obj
**** CubicPower OpenStack Study **** def get_ipam_lib(net_man): return NeutronNovaIPAMLib(net_man)
**** CubicPower OpenStack Study **** class NeutronNovaIPAMLib(object): """Implements Neutron IP Address Management (IPAM) interface using the local Nova database. This implementation is inline with how IPAM is used by other NetworkManagers. """
**** CubicPower OpenStack Study **** def __init__(self, net_manager): """Holds a reference to the "parent" network manager, used to take advantage of various FlatManager methods to avoid code duplication. """ self.net_manager = net_manager
**** CubicPower OpenStack Study **** def get_subnets_by_net_id(self, context, tenant_id, net_id, _vif_id=None): """Returns information about the IPv4 and IPv6 subnets associated with a Neutron Network UUID. """ n = network_obj.Network.get_by_uuid(context.elevated(), net_id) subnet_v4 = { 'network_id': n.uuid, 'cidr': n.cidr, 'gateway': n.gateway, 'broadcast': n.broadcast, 'netmask': n.netmask, 'version': 4, 'dns1': n.dns1, 'dns2': n.dns2} #TODO(tr3buchet): I'm noticing we've assumed here that all dns is v4. # this is probably bad as there is no way to add v6 # dns to nova subnet_v6 = { 'network_id': n.uuid, 'cidr': n.cidr_v6, 'gateway': n.gateway_v6, 'broadcast': None, 'netmask': n.netmask_v6, 'version': 6, 'dns1': None, 'dns2': None} def ips_to_strs(net): for key, value in net.items(): if isinstance(value, netaddr.ip.BaseIP): net[key] = str(value) return net return [ips_to_strs(subnet_v4), ips_to_strs(subnet_v6)]
**** CubicPower OpenStack Study **** def ips_to_strs(net): for key, value in net.items(): if isinstance(value, netaddr.ip.BaseIP): net[key] = str(value) return net return [ips_to_strs(subnet_v4), ips_to_strs(subnet_v6)]
**** CubicPower OpenStack Study **** def get_routes_by_ip_block(self, context, block_id, project_id): """Returns the list of routes for the IP block.""" return []
**** CubicPower OpenStack Study **** def get_v4_ips_by_interface(self, context, net_id, vif_id, project_id): """Returns a list of IPv4 address strings associated with the specified virtual interface, based on the fixed_ips table. """ # TODO(tr3buchet): link fixed_ips to vif by uuid so only 1 db call vif_rec = vif_obj.VirtualInterface.get_by_uuid(context, vif_id) if not vif_rec: return [] fixed_ips = fixed_ip_obj.FixedIPList.get_by_virtual_interface_id( context, vif_rec.id) return [str(fixed_ip.address) for fixed_ip in fixed_ips]
**** CubicPower OpenStack Study **** def get_v6_ips_by_interface(self, context, net_id, vif_id, project_id): """Returns a list containing a single IPv6 address strings associated with the specified virtual interface. """ admin_context = context.elevated() network = network_obj.Network.get_by_uuid(admin_context, net_id) vif_rec = vif_obj.VirtualInterface.get_by_uuid(context, vif_id) if network.cidr_v6 and vif_rec and vif_rec.address: ip = ipv6.to_global(network.cidr_v6, vif_rec.address, project_id) return [ip] return []
**** CubicPower OpenStack Study **** def get_floating_ips_by_fixed_address(self, context, fixed_address): return floating_ip_obj.FloatingIPList.get_by_fixed_address( context, fixed_address)
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