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
110 lines
4.9 KiB
Python
110 lines
4.9 KiB
Python
# Copyright 2016 VMware, Inc. 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 logging
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from neutron.callbacks import registry
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from neutron_lib import constants as const
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from oslo_config import cfg
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from vmware_nsx._i18n import _LI
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from vmware_nsx.common import nsx_constants
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from vmware_nsx.dhcp_meta import rpc as nsx_rpc
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from vmware_nsx.nsxlib.v3 import client
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from vmware_nsx.nsxlib.v3 import cluster
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from vmware_nsx.nsxlib.v3 import native_dhcp
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from vmware_nsx.nsxlib.v3 import resources
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from vmware_nsx.shell.admin.plugins.common import constants
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from vmware_nsx.shell.admin.plugins.common import formatters
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from vmware_nsx.shell.admin.plugins.common import utils as admin_utils
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from vmware_nsx.shell.admin.plugins.nsxv3.resources import utils
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import vmware_nsx.shell.nsxadmin as shell
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LOG = logging.getLogger(__name__)
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neutron_client = utils.NeutronDbClient()
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@admin_utils.output_header
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def list_dhcp_bindings(resource, event, trigger, **kwargs):
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"""List DHCP bindings in Neutron."""
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ports = neutron_client.get_ports()
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comp_ports = [port for port in ports if port['device_owner'].startswith(
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const.DEVICE_OWNER_COMPUTE_PREFIX)]
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LOG.info(formatters.output_formatter(constants.DHCP_BINDING, comp_ports,
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['id', 'mac_address', 'fixed_ips']))
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@admin_utils.output_header
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def nsx_update_dhcp_bindings(resource, event, trigger, **kwargs):
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"""Resync DHCP bindings for NSXv3 CrossHairs."""
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cluster_api = cluster.NSXClusteredAPI()
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nsx_client = client.NSX3Client(cluster_api)
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client._set_default_api_cluster(cluster_api)
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port_resource = resources.LogicalPort(nsx_client)
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dhcp_server_resource = resources.LogicalDhcpServer(nsx_client)
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port_bindings = {} # lswitch_id: [(mac, ip, prefix_length), ...]
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server_bindings = {} # lswitch_id: dhcp_server_id
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ports = neutron_client.get_ports()
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for port in ports:
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network_id = port['network_id']
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device_owner = port['device_owner']
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if device_owner == const.DEVICE_OWNER_DHCP:
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# For each DHCP-enabled network, create a logical DHCP server
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# and update the attachment type to DHCP on the corresponding
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# logical port of the Neutron DHCP port.
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subnet_id = port['fixed_ips'][0]['subnet_id']
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subnet = neutron_client.get_subnet(subnet_id)
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network = neutron_client.get_network(port['network_id'])
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if len(port['fixed_ips']) > 1:
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LOG.info(_LI("Network %(network)s has multiple subnets - "
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"only enable native DHCP on subnet %(subnet)s"),
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{'network': port['network_id'], 'subnet': subnet_id})
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server_data = native_dhcp.build_dhcp_server_config(
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network, subnet, port, 'NSX Neutron plugin upgrade')
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dhcp_server = dhcp_server_resource.create(**server_data)
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lswitch_id, lport_id = neutron_client.get_lswitch_and_lport_id(
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port['id'])
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port_resource.update(lport_id, dhcp_server['id'],
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attachment_type=nsx_constants.ATTACHMENT_DHCP)
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server_bindings[lswitch_id] = dhcp_server['id']
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elif device_owner.startswith(const.DEVICE_OWNER_COMPUTE_PREFIX):
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lswitch_id = neutron_client.net_id_to_lswitch_id(network_id)
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bindings = port_bindings.get(lswitch_id, [])
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bindings.append((port['mac_address'],
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port['fixed_ips'][0]['ip_address']))
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port_bindings[lswitch_id] = bindings
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# Populate mac/IP bindings in each logical DHCP server.
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for lswitch_id, bindings in port_bindings.items():
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dhcp_server_id = server_bindings[lswitch_id]
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for (mac, ip) in bindings:
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hostname = 'host-%s' % ip.replace('.', '-')
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options = {'option121': {'static_routes': [
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{'network': '%s' % nsx_rpc.METADATA_DHCP_ROUTE,
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'next_hop': ip}]}}
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dhcp_server_resource.create_binding(
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dhcp_server_id, mac, ip, hostname,
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cfg.CONF.nsx_v3.dhcp_lease_time, options)
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registry.subscribe(list_dhcp_bindings,
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constants.DHCP_BINDING,
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shell.Operations.LIST.value)
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registry.subscribe(nsx_update_dhcp_bindings,
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constants.DHCP_BINDING,
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shell.Operations.NSX_UPDATE.value)
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