183 lines
7.4 KiB
Python
183 lines
7.4 KiB
Python
# Copyright 2014 VMware, Inc.
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#
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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 neutron_lib.api.definitions import external_net as extnet_apidef
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from neutron_lib import constants as const
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from neutron_lib import exceptions as n_exc
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from oslo_log import log as logging
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from vmware_nsx._i18n import _
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from vmware_nsx.common import exceptions as p_exc
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from vmware_nsx.dhcp_meta import nsx
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from vmware_nsx.dhcp_meta import rpc
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LOG = logging.getLogger(__name__)
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class DhcpMetadataBuilder(object):
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def __init__(self, plugin, agent_notifier):
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self.plugin = plugin
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self.notifier = agent_notifier
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def dhcp_agent_get_all(self, context, network_id):
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"""Return the agents managing the network."""
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return self.plugin.list_dhcp_agents_hosting_network(
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context, network_id)['agents']
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def dhcp_port_get_all(self, context, network_id):
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"""Return the dhcp ports allocated for the network."""
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filters = {
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'network_id': [network_id],
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'device_owner': [const.DEVICE_OWNER_DHCP]
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}
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return self.plugin.get_ports(context, filters=filters)
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def router_id_get(self, context, subnet=None):
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"""Return the router and interface used for the subnet."""
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if not subnet:
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return None
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network_id = subnet['network_id']
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filters = {
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'network_id': [network_id],
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'device_owner': [const.DEVICE_OWNER_ROUTER_INTF]
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}
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ports = self.plugin.get_ports(context, filters=filters)
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for port in ports:
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if port['fixed_ips'][0]['subnet_id'] == subnet['id']:
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return port['device_id']
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def metadata_deallocate(self, context, router_id, subnet_id):
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"""Deallocate metadata services for the subnet."""
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interface = {'subnet_id': subnet_id}
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self.plugin.remove_router_interface(context, router_id, interface)
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def metadata_allocate(self, context, router_id, subnet_id):
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"""Allocate metadata resources for the subnet via the router."""
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interface = {'subnet_id': subnet_id}
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self.plugin.add_router_interface(context, router_id, interface)
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def dhcp_deallocate(self, context, network_id, agents, ports):
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"""Deallocate dhcp resources for the network."""
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for agent in agents:
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self.plugin.remove_network_from_dhcp_agent(
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context, agent['id'], network_id)
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for port in ports:
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try:
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self.plugin.delete_port(context, port['id'])
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except n_exc.PortNotFound:
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LOG.error('Port %s is already gone', port['id'])
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def dhcp_allocate(self, context, network_id, subnet):
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"""Allocate dhcp resources for the subnet."""
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# Create LSN resources
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network_data = {'id': network_id}
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nsx.handle_network_dhcp_access(self.plugin, context,
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network_data, 'create_network')
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if subnet:
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subnet_data = {'subnet': subnet}
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self.notifier.notify(context, subnet_data, 'subnet.create.end')
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# Get DHCP host and metadata entries created for the LSN
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port = {
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'network_id': network_id,
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'fixed_ips': [{'subnet_id': subnet['id']}]
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}
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self.notifier.notify(context, {'port': port}, 'port.update.end')
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class MigrationManager(object):
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def __init__(self, plugin, lsn_manager, agent_notifier):
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self.plugin = plugin
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self.manager = lsn_manager
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self.builder = DhcpMetadataBuilder(plugin, agent_notifier)
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def validate(self, context, network_id):
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"""Validate and return subnet's dhcp info for migration."""
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network = self.plugin.get_network(context, network_id)
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if self.manager.lsn_exists(context, network_id):
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reason = _("LSN already exist")
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raise p_exc.LsnMigrationConflict(net_id=network_id, reason=reason)
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if network[extnet_apidef.EXTERNAL]:
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reason = _("Cannot migrate an external network")
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raise n_exc.BadRequest(resource='network', msg=reason)
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filters = {'network_id': [network_id]}
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subnets = self.plugin.get_subnets(context, filters=filters)
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count = len(subnets)
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if count == 0:
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return None
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elif count == 1 and subnets[0]['cidr'] == rpc.METADATA_SUBNET_CIDR:
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reason = _("Cannot migrate a 'metadata' network")
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raise n_exc.BadRequest(resource='network', msg=reason)
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elif count > 1:
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reason = _("Unable to support multiple subnets per network")
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raise p_exc.LsnMigrationConflict(net_id=network_id, reason=reason)
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else:
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return subnets[0]
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def migrate(self, context, network_id, subnet=None):
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"""Migrate subnet resources to LSN."""
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router_id = self.builder.router_id_get(context, subnet)
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if router_id and subnet:
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# Deallocate resources taken for the router, if any
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self.builder.metadata_deallocate(context, router_id, subnet['id'])
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if subnet:
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# Deallocate reources taken for the agent, if any
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agents = self.builder.dhcp_agent_get_all(context, network_id)
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ports = self.builder.dhcp_port_get_all(context, network_id)
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self.builder.dhcp_deallocate(context, network_id, agents, ports)
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# (re)create the configuration for LSN
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self.builder.dhcp_allocate(context, network_id, subnet)
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if router_id and subnet:
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# Allocate resources taken for the router, if any
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self.builder.metadata_allocate(context, router_id, subnet['id'])
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def report(self, context, network_id, subnet_id=None):
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"""Return a report of the dhcp and metadata resources in use."""
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if subnet_id:
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lsn_id, lsn_port_id = self.manager.lsn_port_get(
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context, network_id, subnet_id, raise_on_err=False)
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else:
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filters = {'network_id': [network_id]}
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subnets = self.plugin.get_subnets(context, filters=filters)
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if subnets:
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lsn_id, lsn_port_id = self.manager.lsn_port_get(
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context, network_id, subnets[0]['id'], raise_on_err=False)
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else:
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lsn_id = self.manager.lsn_get(context, network_id,
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raise_on_err=False)
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lsn_port_id = None
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if lsn_id:
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ports = [lsn_port_id] if lsn_port_id else []
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report = {
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'type': 'lsn',
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'services': [lsn_id],
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'ports': ports
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}
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else:
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agents = self.builder.dhcp_agent_get_all(context, network_id)
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ports = self.builder.dhcp_port_get_all(context, network_id)
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report = {
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'type': 'agent',
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'services': [a['id'] for a in agents],
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'ports': [p['id'] for p in ports]
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}
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return report
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