324 lines
14 KiB
Python
324 lines
14 KiB
Python
# Copyright 2013 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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#
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_utils import excutils
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from neutron.api.v2 import attributes as attr
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from neutron.common import constants as const
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from neutron.common import exceptions as n_exc
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from neutron.db import db_base_plugin_v2
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from neutron.db import l3_db
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from neutron.extensions import external_net
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from neutron.i18n import _LE, _LI
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from vmware_nsx.neutron.plugins.vmware.common import exceptions as p_exc
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from vmware_nsx.neutron.plugins.vmware.dhcp_meta import constants as d_const
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from vmware_nsx.neutron.plugins.vmware.nsxlib import lsn as lsn_api
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LOG = logging.getLogger(__name__)
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dhcp_opts = [
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cfg.ListOpt('extra_domain_name_servers',
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deprecated_group='NVP_DHCP',
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default=[],
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help=_('Comma separated list of additional '
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'domain name servers')),
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cfg.StrOpt('domain_name',
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deprecated_group='NVP_DHCP',
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default='openstacklocal',
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help=_('Domain to use for building the hostnames')),
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cfg.IntOpt('default_lease_time', default=43200,
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deprecated_group='NVP_DHCP',
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help=_("Default DHCP lease time")),
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]
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metadata_opts = [
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cfg.StrOpt('metadata_server_address',
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deprecated_group='NVP_METADATA',
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default='127.0.0.1',
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help=_("IP address used by Metadata server.")),
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cfg.IntOpt('metadata_server_port',
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deprecated_group='NVP_METADATA',
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default=8775,
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help=_("TCP Port used by Metadata server.")),
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cfg.StrOpt('metadata_shared_secret',
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deprecated_group='NVP_METADATA',
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default='',
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help=_('Shared secret to sign instance-id request'),
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secret=True)
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]
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def register_dhcp_opts(config):
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config.CONF.register_opts(dhcp_opts, group="NSX_DHCP")
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def register_metadata_opts(config):
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config.CONF.register_opts(metadata_opts, group="NSX_METADATA")
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class DhcpAgentNotifyAPI(object):
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def __init__(self, plugin, lsn_manager):
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self.plugin = plugin
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self.lsn_manager = lsn_manager
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self._handle_subnet_dhcp_access = {'create': self._subnet_create,
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'update': self._subnet_update,
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'delete': self._subnet_delete}
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def notify(self, context, data, methodname):
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[resource, action, _e] = methodname.split('.')
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if resource == 'subnet':
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self._handle_subnet_dhcp_access[action](context, data['subnet'])
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elif resource == 'port' and action == 'update':
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self._port_update(context, data['port'])
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def _port_update(self, context, port):
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# With no fixed IP's there's nothing that can be updated
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if not port["fixed_ips"]:
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return
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network_id = port['network_id']
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subnet_id = port["fixed_ips"][0]['subnet_id']
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filters = {'network_id': [network_id]}
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# Because NSX does not support updating a single host entry we
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# got to build the whole list from scratch and update in bulk
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ports = self.plugin.get_ports(context, filters)
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if not ports:
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return
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dhcp_conf = [
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{'mac_address': p['mac_address'],
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'ip_address': p["fixed_ips"][0]['ip_address']}
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for p in ports if is_user_port(p)
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]
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meta_conf = [
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{'instance_id': p['device_id'],
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'ip_address': p["fixed_ips"][0]['ip_address']}
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for p in ports if is_user_port(p, check_dev_id=True)
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]
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self.lsn_manager.lsn_port_update(
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context, network_id, subnet_id, dhcp=dhcp_conf, meta=meta_conf)
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def _subnet_create(self, context, subnet, clean_on_err=True):
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if subnet['enable_dhcp']:
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network_id = subnet['network_id']
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# Create port for DHCP service
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dhcp_port = {
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"name": "",
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"admin_state_up": True,
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"device_id": "",
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"device_owner": const.DEVICE_OWNER_DHCP,
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"network_id": network_id,
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"tenant_id": subnet["tenant_id"],
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"mac_address": attr.ATTR_NOT_SPECIFIED,
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"fixed_ips": [{"subnet_id": subnet['id']}]
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}
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try:
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# This will end up calling handle_port_dhcp_access
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# down below as well as handle_port_metadata_access
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self.plugin.create_port(context, {'port': dhcp_port})
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except p_exc.PortConfigurationError as e:
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LOG.error(_LE("Error while creating subnet %(cidr)s for "
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"network %(network)s. Please, contact "
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"administrator"),
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{"cidr": subnet["cidr"],
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"network": network_id})
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db_base_plugin_v2.NeutronDbPluginV2.delete_port(
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self.plugin, context, e.port_id)
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if clean_on_err:
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self.plugin.delete_subnet(context, subnet['id'])
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raise n_exc.Conflict()
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def _subnet_update(self, context, subnet):
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network_id = subnet['network_id']
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try:
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lsn_id, lsn_port_id = self.lsn_manager.lsn_port_get(
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context, network_id, subnet['id'])
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self.lsn_manager.lsn_port_dhcp_configure(
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context, lsn_id, lsn_port_id, subnet)
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except p_exc.LsnPortNotFound:
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# It's possible that the subnet was created with dhcp off;
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# check if the subnet was uplinked onto a router, and if so
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# remove the patch attachment between the metadata port and
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# the lsn port, in favor on the one we'll be creating during
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# _subnet_create
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self.lsn_manager.lsn_port_dispose(
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context, network_id, d_const.METADATA_MAC)
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# also, check that a dhcp port exists first and provision it
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# accordingly
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filters = dict(network_id=[network_id],
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device_owner=[const.DEVICE_OWNER_DHCP])
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ports = self.plugin.get_ports(context, filters=filters)
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if ports:
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handle_port_dhcp_access(
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self.plugin, context, ports[0], 'create_port')
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else:
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self._subnet_create(context, subnet, clean_on_err=False)
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def _subnet_delete(self, context, subnet):
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# FIXME(armando-migliaccio): it looks like that a subnet filter
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# is ineffective; so filter by network for now.
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network_id = subnet['network_id']
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filters = dict(network_id=[network_id],
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device_owner=[const.DEVICE_OWNER_DHCP])
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# FIXME(armando-migliaccio): this may be race-y
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ports = self.plugin.get_ports(context, filters=filters)
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if ports:
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# This will end up calling handle_port_dhcp_access
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# down below as well as handle_port_metadata_access
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self.plugin.delete_port(context, ports[0]['id'])
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def is_user_port(p, check_dev_id=False):
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usable = p['fixed_ips'] and p['device_owner'] not in d_const.SPECIAL_OWNERS
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return usable if not check_dev_id else usable and p['device_id']
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def check_services_requirements(cluster):
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ver = cluster.api_client.get_version()
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# It sounds like 4.1 is the first one where DHCP in NSX
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# will have the experimental feature
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if ver.major >= 4 and ver.minor >= 1:
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cluster_id = cfg.CONF.default_service_cluster_uuid
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if not lsn_api.service_cluster_exists(cluster, cluster_id):
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raise p_exc.ServiceClusterUnavailable(cluster_id=cluster_id)
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else:
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raise p_exc.InvalidVersion(version=ver)
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def handle_network_dhcp_access(plugin, context, network, action):
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LOG.info(_LI("Performing DHCP %(action)s for resource: %(resource)s"),
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{"action": action, "resource": network})
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if action == 'create_network':
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network_id = network['id']
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if network.get(external_net.EXTERNAL):
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LOG.info(_LI("Network %s is external: no LSN to create"),
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network_id)
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return
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plugin.lsn_manager.lsn_create(context, network_id)
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elif action == 'delete_network':
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# NOTE(armando-migliaccio): on delete_network, network
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# is just the network id
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network_id = network
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plugin.lsn_manager.lsn_delete_by_network(context, network_id)
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LOG.info(_LI("Logical Services Node for network "
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"%s configured successfully"), network_id)
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def handle_port_dhcp_access(plugin, context, port, action):
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LOG.info(_LI("Performing DHCP %(action)s for resource: %(resource)s"),
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{"action": action, "resource": port})
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if port["device_owner"] == const.DEVICE_OWNER_DHCP:
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network_id = port["network_id"]
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if action == "create_port":
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# at this point the port must have a subnet and a fixed ip
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subnet_id = port["fixed_ips"][0]['subnet_id']
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subnet = plugin.get_subnet(context, subnet_id)
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subnet_data = {
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"mac_address": port["mac_address"],
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"ip_address": subnet['cidr'],
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"subnet_id": subnet['id']
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}
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try:
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plugin.lsn_manager.lsn_port_dhcp_setup(
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context, network_id, port['id'], subnet_data, subnet)
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except p_exc.PortConfigurationError:
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LOG.error(_LE("Error while configuring DHCP for "
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"port %s"), port['id'])
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raise n_exc.NeutronException()
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elif action == "delete_port":
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plugin.lsn_manager.lsn_port_dispose(context, network_id,
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port['mac_address'])
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elif port["device_owner"] != const.DEVICE_OWNER_DHCP:
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if port.get("fixed_ips"):
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# do something only if there are IP's and dhcp is enabled
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subnet_id = port["fixed_ips"][0]['subnet_id']
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if not plugin.get_subnet(context, subnet_id)['enable_dhcp']:
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LOG.info(_LI("DHCP is disabled for subnet %s: nothing "
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"to do"), subnet_id)
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return
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host_data = {
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"mac_address": port["mac_address"],
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"ip_address": port["fixed_ips"][0]['ip_address']
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}
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network_id = port["network_id"]
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if action == "create_port":
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handler = plugin.lsn_manager.lsn_port_dhcp_host_add
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elif action == "delete_port":
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handler = plugin.lsn_manager.lsn_port_dhcp_host_remove
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try:
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handler(context, network_id, subnet_id, host_data)
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except p_exc.PortConfigurationError:
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with excutils.save_and_reraise_exception():
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if action == 'create_port':
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db_base_plugin_v2.NeutronDbPluginV2.delete_port(
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plugin, context, port['id'])
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LOG.info(_LI("DHCP for port %s configured successfully"), port['id'])
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def handle_port_metadata_access(plugin, context, port, is_delete=False):
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if is_user_port(port, check_dev_id=True):
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network_id = port["network_id"]
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network = plugin.get_network(context, network_id)
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if network[external_net.EXTERNAL]:
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LOG.info(_LI("Network %s is external: nothing to do"),
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network_id)
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return
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subnet_id = port["fixed_ips"][0]['subnet_id']
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host_data = {
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"instance_id": port["device_id"],
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"tenant_id": port["tenant_id"],
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"ip_address": port["fixed_ips"][0]['ip_address']
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}
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LOG.info(_LI("Configuring metadata entry for port %s"), port)
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if not is_delete:
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handler = plugin.lsn_manager.lsn_port_meta_host_add
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else:
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handler = plugin.lsn_manager.lsn_port_meta_host_remove
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try:
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handler(context, network_id, subnet_id, host_data)
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except p_exc.PortConfigurationError:
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with excutils.save_and_reraise_exception():
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if not is_delete:
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db_base_plugin_v2.NeutronDbPluginV2.delete_port(
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plugin, context, port['id'])
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LOG.info(_LI("Metadata for port %s configured successfully"),
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port['id'])
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def handle_router_metadata_access(plugin, context, router_id, interface=None):
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LOG.info(_LI("Handle metadata access via router: %(r)s and "
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"interface %(i)s"), {'r': router_id, 'i': interface})
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if interface:
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try:
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plugin.get_port(context, interface['port_id'])
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is_enabled = True
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except n_exc.NotFound:
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is_enabled = False
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subnet_id = interface['subnet_id']
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try:
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plugin.lsn_manager.lsn_metadata_configure(
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context, subnet_id, is_enabled)
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except p_exc.NsxPluginException:
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with excutils.save_and_reraise_exception():
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if is_enabled:
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l3_db.L3_NAT_db_mixin.remove_router_interface(
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plugin, context, router_id, interface)
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LOG.info(_LI("Metadata for router %s handled successfully"), router_id)
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