ee09d2f624
Mostly trivial import changes. - oslo.i18n no longer provide install() method to inject _() into globals(), so removed all calls to it; - removed Babel from dependencies (it will now be grabbed by oslo.i18n); - updated tox.ini to ignore import violations for oslo.i18n. Change-Id: I6623d551f512fb7fe9bf35ee734ed6d4c6cbc287
267 lines
10 KiB
Python
267 lines
10 KiB
Python
# Copyright (c) 2014 OpenStack Foundation.
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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 eventlet
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from novaclient import exceptions as nova_exceptions
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import novaclient.v1_1.client as nclient
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from novaclient.v1_1.contrib import server_external_events
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from oslo.config import cfg
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from sqlalchemy.orm import attributes as sql_attr
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from neutron.common import constants
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from neutron import context
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from neutron.i18n import _LE, _LI, _LW
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from neutron import manager
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from neutron.openstack.common import log as logging
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from neutron.openstack.common import uuidutils
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LOG = logging.getLogger(__name__)
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VIF_UNPLUGGED = 'network-vif-unplugged'
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VIF_PLUGGED = 'network-vif-plugged'
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NEUTRON_NOVA_EVENT_STATUS_MAP = {constants.PORT_STATUS_ACTIVE: 'completed',
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constants.PORT_STATUS_ERROR: 'failed',
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constants.PORT_STATUS_DOWN: 'completed'}
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class Notifier(object):
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def __init__(self):
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# TODO(arosen): we need to cache the endpoints and figure out
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# how to deal with different regions here....
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if cfg.CONF.nova_admin_tenant_id:
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bypass_url = "%s/%s" % (cfg.CONF.nova_url,
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cfg.CONF.nova_admin_tenant_id)
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else:
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bypass_url = None
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self.nclient = nclient.Client(
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username=cfg.CONF.nova_admin_username,
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api_key=cfg.CONF.nova_admin_password,
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project_id=cfg.CONF.nova_admin_tenant_name,
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tenant_id=cfg.CONF.nova_admin_tenant_id,
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auth_url=cfg.CONF.nova_admin_auth_url,
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cacert=cfg.CONF.nova_ca_certificates_file,
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insecure=cfg.CONF.nova_api_insecure,
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bypass_url=bypass_url,
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region_name=cfg.CONF.nova_region_name,
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extensions=[server_external_events])
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self.pending_events = []
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self._waiting_to_send = False
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def queue_event(self, event):
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"""Called to queue sending an event with the next batch of events.
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Sending events individually, as they occur, has been problematic as it
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can result in a flood of sends. Previously, there was a loopingcall
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thread that would send batched events on a periodic interval. However,
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maintaining a persistent thread in the loopingcall was also
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problematic.
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This replaces the loopingcall with a mechanism that creates a
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short-lived thread on demand when the first event is queued. That
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thread will sleep once for the same send_events_interval to allow other
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events to queue up in pending_events and then will send them when it
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wakes.
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If a thread is already alive and waiting, this call will simply queue
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the event and return leaving it up to the thread to send it.
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:param event: the event that occurred.
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"""
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if not event:
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return
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self.pending_events.append(event)
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if self._waiting_to_send:
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return
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self._waiting_to_send = True
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def last_out_sends():
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eventlet.sleep(cfg.CONF.send_events_interval)
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self._waiting_to_send = False
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self.send_events()
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eventlet.spawn_n(last_out_sends)
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def _is_compute_port(self, port):
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try:
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if (port['device_id'] and uuidutils.is_uuid_like(port['device_id'])
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and port['device_owner'].startswith('compute:')):
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return True
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except (KeyError, AttributeError):
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pass
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return False
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def _get_network_changed_event(self, device_id):
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return {'name': 'network-changed',
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'server_uuid': device_id}
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@property
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def _plugin(self):
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# NOTE(arosen): this cannot be set in __init__ currently since
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# this class is initialized at the same time as NeutronManager()
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# which is decorated with synchronized()
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if not hasattr(self, '_plugin_ref'):
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self._plugin_ref = manager.NeutronManager.get_plugin()
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return self._plugin_ref
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def send_network_change(self, action, original_obj,
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returned_obj):
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"""Called when a network change is made that nova cares about.
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:param action: the event that occurred.
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:param original_obj: the previous value of resource before action.
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:param returned_obj: the body returned to client as result of action.
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"""
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if not cfg.CONF.notify_nova_on_port_data_changes:
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return
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# When neutron re-assigns floating ip from an original instance
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# port to a new instance port without disassociate it first, an
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# event should be sent for original instance, that will make nova
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# know original instance's info, and update database for it.
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if (action == 'update_floatingip'
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and returned_obj['floatingip'].get('port_id')
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and original_obj.get('port_id')):
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disassociate_returned_obj = {'floatingip': {'port_id': None}}
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event = self.create_port_changed_event(action, original_obj,
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disassociate_returned_obj)
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self.queue_event(event)
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event = self.create_port_changed_event(action, original_obj,
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returned_obj)
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self.queue_event(event)
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def create_port_changed_event(self, action, original_obj, returned_obj):
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port = None
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if action == 'update_port':
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port = returned_obj['port']
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elif action in ['update_floatingip', 'create_floatingip',
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'delete_floatingip']:
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# NOTE(arosen) if we are associating a floatingip the
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# port_id is in the returned_obj. Otherwise on disassociate
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# it's in the original_object
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port_id = (returned_obj['floatingip'].get('port_id') or
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original_obj.get('port_id'))
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if port_id is None:
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return
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ctx = context.get_admin_context()
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port = self._plugin.get_port(ctx, port_id)
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if port and self._is_compute_port(port):
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return self._get_network_changed_event(port['device_id'])
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def record_port_status_changed(self, port, current_port_status,
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previous_port_status, initiator):
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"""Determine if nova needs to be notified due to port status change.
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"""
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# clear out previous _notify_event
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port._notify_event = None
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# If there is no device_id set there is nothing we can do here.
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if not port.device_id:
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LOG.debug("device_id is not set on port yet.")
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return
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if not port.id:
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LOG.warning(_LW("Port ID not set! Nova will not be notified of "
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"port status change."))
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return
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# We only want to notify about nova ports.
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if not self._is_compute_port(port):
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return
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# We notify nova when a vif is unplugged which only occurs when
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# the status goes from ACTIVE to DOWN.
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if (previous_port_status == constants.PORT_STATUS_ACTIVE and
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current_port_status == constants.PORT_STATUS_DOWN):
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event_name = VIF_UNPLUGGED
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# We only notify nova when a vif is plugged which only occurs
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# when the status goes from:
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# NO_VALUE/DOWN/BUILD -> ACTIVE/ERROR.
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elif (previous_port_status in [sql_attr.NO_VALUE,
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constants.PORT_STATUS_DOWN,
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constants.PORT_STATUS_BUILD]
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and current_port_status in [constants.PORT_STATUS_ACTIVE,
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constants.PORT_STATUS_ERROR]):
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event_name = VIF_PLUGGED
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# All the remaining state transitions are of no interest to nova
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else:
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LOG.debug("Ignoring state change previous_port_status: "
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"%(pre_status)s current_port_status: %(cur_status)s"
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" port_id %(id)s",
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{'pre_status': previous_port_status,
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'cur_status': current_port_status,
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'id': port.id})
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return
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port._notify_event = (
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{'server_uuid': port.device_id,
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'name': event_name,
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'status': NEUTRON_NOVA_EVENT_STATUS_MAP.get(current_port_status),
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'tag': port.id})
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def send_port_status(self, mapper, connection, port):
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event = getattr(port, "_notify_event", None)
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self.queue_event(event)
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port._notify_event = None
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def send_events(self):
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if not self.pending_events:
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return
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batched_events = self.pending_events
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self.pending_events = []
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LOG.debug("Sending events: %s", batched_events)
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try:
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response = self.nclient.server_external_events.create(
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batched_events)
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except nova_exceptions.NotFound:
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LOG.warning(_LW("Nova returned NotFound for event: %s"),
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batched_events)
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except Exception:
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LOG.exception(_LE("Failed to notify nova on events: %s"),
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batched_events)
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else:
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if not isinstance(response, list):
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LOG.error(_LE("Error response returned from nova: %s"),
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response)
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return
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response_error = False
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for event in response:
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try:
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code = event['code']
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except KeyError:
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response_error = True
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continue
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if code != 200:
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LOG.warning(_LW("Nova event: %s returned with failed "
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"status"), event)
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else:
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LOG.info(_LI("Nova event response: %s"), event)
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if response_error:
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LOG.error(_LE("Error response returned from nova: %s"),
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response)
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