4ad3cae6ff
This is feature patch (3 of 3) that introduces support for transitioning existing NSX-based deployments from the agent based model of providing dhcp and metadata proxy services to the new agentless based mode. In 'combined' mode, existing networks will still be served by the existing infrastructure, whereas new networks will be served by the new infrastructure. Networks may be migrated to the model using a new CLI tool provided, called 'neutron-nsx-manage'. Currently the tool provides two admin-only commands: neutron-nsx-manage net-report <net-id-or-name> This will check that the network can be migrated and returns the resources currently in use. And: neutron-nsx-manage net-migrate <net-id-or-name> This will move the network over the new model and deallocate resources from the agent. Once a network has been migrated there is no turning back. Completes-blueprint nsx-integrated-services Change-Id: I37c9aa0e76124e1023899106406de7be6714c24d
158 lines
6.9 KiB
Python
158 lines
6.9 KiB
Python
# Copyright 2013 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 oslo.config import cfg
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from neutron.api.rpc.agentnotifiers import dhcp_rpc_agent_api
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from neutron.common import constants as const
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from neutron.common import topics
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from neutron.openstack.common import importutils
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from neutron.openstack.common import log as logging
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from neutron.openstack.common import rpc
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from neutron.plugins.nicira.common import config
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from neutron.plugins.nicira.common import exceptions as nsx_exc
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from neutron.plugins.nicira.dhcp_meta import combined
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from neutron.plugins.nicira.dhcp_meta import lsnmanager
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from neutron.plugins.nicira.dhcp_meta import migration
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from neutron.plugins.nicira.dhcp_meta import nsx as nsx_svc
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from neutron.plugins.nicira.dhcp_meta import rpc as nsx_rpc
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from neutron.plugins.nicira.extensions import lsn
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LOG = logging.getLogger(__name__)
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class DhcpMetadataAccess(object):
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def setup_dhcpmeta_access(self):
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"""Initialize support for DHCP and Metadata services."""
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self._init_extensions()
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if cfg.CONF.NSX.agent_mode == config.AgentModes.AGENT:
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self._setup_rpc_dhcp_metadata()
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mod = nsx_rpc
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elif cfg.CONF.NSX.agent_mode == config.AgentModes.AGENTLESS:
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self._setup_nsx_dhcp_metadata()
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mod = nsx_svc
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elif cfg.CONF.NSX.agent_mode == config.AgentModes.COMBINED:
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notifier = self._setup_nsx_dhcp_metadata()
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self._setup_rpc_dhcp_metadata(notifier=notifier)
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mod = combined
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else:
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error = _("Invalid agent_mode: %s") % cfg.CONF.NSX.agent_mode
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LOG.error(error)
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raise nsx_exc.NvpPluginException(err_msg=error)
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self.handle_network_dhcp_access_delegate = (
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mod.handle_network_dhcp_access
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)
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self.handle_port_dhcp_access_delegate = (
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mod.handle_port_dhcp_access
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)
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self.handle_port_metadata_access_delegate = (
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mod.handle_port_metadata_access
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)
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self.handle_metadata_access_delegate = (
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mod.handle_router_metadata_access
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)
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def _setup_rpc_dhcp_metadata(self, notifier=None):
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self.topic = topics.PLUGIN
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self.conn = rpc.create_connection(new=True)
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self.dispatcher = nsx_rpc.NVPRpcCallbacks().create_rpc_dispatcher()
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self.conn.create_consumer(self.topic, self.dispatcher, fanout=False)
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self.agent_notifiers[const.AGENT_TYPE_DHCP] = (
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notifier or dhcp_rpc_agent_api.DhcpAgentNotifyAPI())
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self.conn.consume_in_thread()
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self.network_scheduler = importutils.import_object(
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cfg.CONF.network_scheduler_driver
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)
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self.supported_extension_aliases.extend(
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['agent', 'dhcp_agent_scheduler'])
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def _setup_nsx_dhcp_metadata(self):
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self._check_services_requirements()
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nsx_svc.register_dhcp_opts(cfg)
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nsx_svc.register_metadata_opts(cfg)
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lsnmanager.register_lsn_opts(cfg)
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lsn_manager = lsnmanager.PersistentLsnManager(self)
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self.lsn_manager = lsn_manager
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if cfg.CONF.NSX.agent_mode == config.AgentModes.AGENTLESS:
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notifier = nsx_svc.DhcpAgentNotifyAPI(self, lsn_manager)
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self.agent_notifiers[const.AGENT_TYPE_DHCP] = notifier
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# In agentless mode, ports whose owner is DHCP need to
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# be special cased; so add it to the list of special
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# owners list
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if const.DEVICE_OWNER_DHCP not in self.port_special_owners:
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self.port_special_owners.append(const.DEVICE_OWNER_DHCP)
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elif cfg.CONF.NSX.agent_mode == config.AgentModes.COMBINED:
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# This becomes ineffective, as all new networks creations
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# are handled by Logical Services Nodes in NSX
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cfg.CONF.set_override('network_auto_schedule', False)
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LOG.warn(_('network_auto_schedule has been disabled'))
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notifier = combined.DhcpAgentNotifyAPI(self, lsn_manager)
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self.supported_extension_aliases.append(lsn.EXT_ALIAS)
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# Add the capability to migrate dhcp and metadata services over
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self.migration_manager = (
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migration.MigrationManager(self, lsn_manager, notifier))
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return notifier
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def _init_extensions(self):
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extensions = (lsn.EXT_ALIAS, 'agent', 'dhcp_agent_scheduler')
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for ext in extensions:
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if ext in self.supported_extension_aliases:
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self.supported_extension_aliases.remove(ext)
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def _check_services_requirements(self):
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try:
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error = None
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nsx_svc.check_services_requirements(self.cluster)
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except nsx_exc.NvpInvalidVersion:
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error = _("Unable to run Neutron with config option '%s', as NSX "
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"does not support it") % cfg.CONF.NSX.agent_mode
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except nsx_exc.ServiceClusterUnavailable:
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error = _("Unmet dependency for config option "
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"'%s'") % cfg.CONF.NSX.agent_mode
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if error:
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LOG.exception(error)
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raise nsx_exc.NvpPluginException(err_msg=error)
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def get_lsn(self, context, network_id, fields=None):
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report = self.migration_manager.report(context, network_id)
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return {'network': network_id, 'report': report}
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def create_lsn(self, context, lsn):
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network_id = lsn['lsn']['network']
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subnet = self.migration_manager.validate(context, network_id)
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subnet_id = None if not subnet else subnet['id']
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self.migration_manager.migrate(context, network_id, subnet)
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r = self.migration_manager.report(context, network_id, subnet_id)
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return {'network': network_id, 'report': r}
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def handle_network_dhcp_access(self, context, network, action):
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self.handle_network_dhcp_access_delegate(self, context,
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network, action)
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def handle_port_dhcp_access(self, context, port_data, action):
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self.handle_port_dhcp_access_delegate(self, context, port_data, action)
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def handle_port_metadata_access(self, context, port, is_delete=False):
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self.handle_port_metadata_access_delegate(self, context,
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port, is_delete)
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def handle_router_metadata_access(self, context,
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router_id, interface=None):
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self.handle_metadata_access_delegate(self, context,
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router_id, interface)
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