80 lines
3.3 KiB
Python
80 lines
3.3 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 vmware_nsxlib.v3 import utils
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class NsxLibNativeDhcp(utils.NsxLibApiBase):
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def build_server_config(self, network, subnet, port, tags,
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default_dns_nameservers=None,
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default_dns_domain=None):
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# Prepare the configuration 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_nameservers = subnet['dns_nameservers']
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if not dns_nameservers or not validators.is_attr_set(dns_nameservers):
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# use the default one , or the globally configured one
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if default_dns_nameservers is not None:
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dns_nameservers = default_dns_nameservers
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else:
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dns_nameservers = self.nsxlib_config.dns_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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name = utils.get_name_and_uuid(network['name'] or 'dhcpserver',
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network['id'])
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dns_domain = network.get('dns_domain')
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if dns_domain:
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domain_name = dns_domain['dns_domain']
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else:
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# use the default one , or the globally configured one
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if default_dns_domain is not None:
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domain_name = default_dns_domain
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else:
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domain_name = self.nsxlib_config.dns_domain
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return {'name': name,
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'server_ip': server_ip,
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'dns_nameservers': dns_nameservers,
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'domain_name': domain_name,
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'gateway_ip': gateway_ip,
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'options': options,
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'tags': tags}
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