5dc1c19037
This patch allows VMs on Neutron networks to switch from Neutron DHCP service to NSX native DHCP service. It also includes admin tool to enable native DHCP on existing Neutron networks. Change-Id: I4739443aa743744d80afc2acdd8b11229e0f076c
63 lines
2.5 KiB
Python
63 lines
2.5 KiB
Python
# Copyright 2016 VMware, Inc.
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# All Rights Reserved
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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 neutron_lib.api import validators
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from neutron_lib import constants
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from oslo_config import cfg
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from vmware_nsx.common import utils
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def build_dhcp_server_config(network, subnet, port, project_name):
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# Prepare the configutation for a new logical DHCP server.
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server_ip = "%s/%u" % (port['fixed_ips'][0]['ip_address'],
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netaddr.IPNetwork(subnet['cidr']).prefixlen)
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dns_servers = subnet['dns_nameservers']
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if not dns_servers or not validators.is_attr_set(dns_servers):
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dns_servers = cfg.CONF.nsx_v3.nameservers
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gateway_ip = subnet['gateway_ip']
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if not validators.is_attr_set(gateway_ip):
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gateway_ip = None
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# The following code is based on _generate_opts_per_subnet() in
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# neutron/agent/linux/dhcp.py. It prepares DHCP options for a subnet.
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# Add route for directly connected network.
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host_routes = [{'network': subnet['cidr'], 'next_hop': '0.0.0.0'}]
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# Copy routes from subnet host_routes attribute.
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for hr in subnet['host_routes']:
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if hr.destination == constants.IPv4_ANY:
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if not gateway_ip:
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gateway_ip = hr.nexthop
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else:
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host_routes.append({'network': hr.destination,
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'next_hop': hr.nexthop})
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# If gateway_ip is defined, add default route via this gateway.
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if gateway_ip:
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host_routes.append({'network': constants.IPv4_ANY,
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'next_hop': gateway_ip})
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options = {'option121': {'static_routes': host_routes}}
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tags = utils.build_v3_tags_payload(
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network, resource_type='os-neutron-net-id', project_name=project_name)
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return {'dhcp_profile_id': cfg.CONF.nsx_v3.dhcp_profile_uuid,
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'server_ip': server_ip,
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'dns_servers': dns_servers,
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'domain_name': cfg.CONF.nsx_v3.dns_domain,
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'gateway_ip': gateway_ip,
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'options': options,
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'tags': tags}
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