250 lines
9.6 KiB
Python
250 lines
9.6 KiB
Python
# Copyright (c) 2014 OpenStack Foundation.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
import eventlet
|
|
from novaclient import exceptions as nova_exceptions
|
|
import novaclient.v1_1.client as nclient
|
|
from novaclient.v1_1.contrib import server_external_events
|
|
from oslo.config import cfg
|
|
from sqlalchemy.orm import attributes as sql_attr
|
|
|
|
from neutron.common import constants
|
|
from neutron import context
|
|
from neutron import manager
|
|
from neutron.openstack.common import log as logging
|
|
from neutron.openstack.common import uuidutils
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
VIF_UNPLUGGED = 'network-vif-unplugged'
|
|
VIF_PLUGGED = 'network-vif-plugged'
|
|
NEUTRON_NOVA_EVENT_STATUS_MAP = {constants.PORT_STATUS_ACTIVE: 'completed',
|
|
constants.PORT_STATUS_ERROR: 'failed',
|
|
constants.PORT_STATUS_DOWN: 'completed'}
|
|
|
|
|
|
class Notifier(object):
|
|
|
|
def __init__(self):
|
|
# TODO(arosen): we need to cache the endpoints and figure out
|
|
# how to deal with different regions here....
|
|
bypass_url = "%s/%s" % (cfg.CONF.nova_url,
|
|
cfg.CONF.nova_admin_tenant_id)
|
|
self.nclient = nclient.Client(
|
|
username=cfg.CONF.nova_admin_username,
|
|
api_key=cfg.CONF.nova_admin_password,
|
|
project_id=None,
|
|
tenant_id=cfg.CONF.nova_admin_tenant_id,
|
|
auth_url=cfg.CONF.nova_admin_auth_url,
|
|
cacert=cfg.CONF.nova_ca_certificates_file,
|
|
insecure=cfg.CONF.nova_api_insecure,
|
|
bypass_url=bypass_url,
|
|
region_name=cfg.CONF.nova_region_name,
|
|
extensions=[server_external_events])
|
|
self.pending_events = []
|
|
self._waiting_to_send = False
|
|
|
|
def queue_event(self, event):
|
|
"""Called to queue sending an event with the next batch of events.
|
|
|
|
Sending events individually, as they occur, has been problematic as it
|
|
can result in a flood of sends. Previously, there was a loopingcall
|
|
thread that would send batched events on a periodic interval. However,
|
|
maintaining a persistent thread in the loopingcall was also
|
|
problematic.
|
|
|
|
This replaces the loopingcall with a mechanism that creates a
|
|
short-lived thread on demand when the first event is queued. That
|
|
thread will sleep once for the same send_events_interval to allow other
|
|
events to queue up in pending_events and then will send them when it
|
|
wakes.
|
|
|
|
If a thread is already alive and waiting, this call will simply queue
|
|
the event and return leaving it up to the thread to send it.
|
|
|
|
:param event: the event that occurred.
|
|
"""
|
|
if not event:
|
|
return
|
|
|
|
self.pending_events.append(event)
|
|
|
|
if self._waiting_to_send:
|
|
return
|
|
|
|
self._waiting_to_send = True
|
|
|
|
def last_out_sends():
|
|
eventlet.sleep(cfg.CONF.send_events_interval)
|
|
self._waiting_to_send = False
|
|
self.send_events()
|
|
|
|
eventlet.spawn_n(last_out_sends)
|
|
|
|
def _is_compute_port(self, port):
|
|
try:
|
|
if (port['device_id'] and uuidutils.is_uuid_like(port['device_id'])
|
|
and port['device_owner'].startswith('compute:')):
|
|
return True
|
|
except (KeyError, AttributeError):
|
|
pass
|
|
return False
|
|
|
|
def _get_network_changed_event(self, device_id):
|
|
return {'name': 'network-changed',
|
|
'server_uuid': device_id}
|
|
|
|
@property
|
|
def _plugin(self):
|
|
# NOTE(arosen): this cannot be set in __init__ currently since
|
|
# this class is initialized at the same time as NeutronManager()
|
|
# which is decorated with synchronized()
|
|
if not hasattr(self, '_plugin_ref'):
|
|
self._plugin_ref = manager.NeutronManager.get_plugin()
|
|
return self._plugin_ref
|
|
|
|
def send_network_change(self, action, original_obj,
|
|
returned_obj):
|
|
"""Called when a network change is made that nova cares about.
|
|
|
|
:param action: the event that occurred.
|
|
:param original_obj: the previous value of resource before action.
|
|
:param returned_obj: the body returned to client as result of action.
|
|
"""
|
|
|
|
if not cfg.CONF.notify_nova_on_port_data_changes:
|
|
return
|
|
|
|
event = self.create_port_changed_event(action, original_obj,
|
|
returned_obj)
|
|
self.queue_event(event)
|
|
|
|
def create_port_changed_event(self, action, original_obj, returned_obj):
|
|
port = None
|
|
if action == 'update_port':
|
|
port = returned_obj['port']
|
|
|
|
elif action in ['update_floatingip', 'create_floatingip',
|
|
'delete_floatingip']:
|
|
# NOTE(arosen) if we are associating a floatingip the
|
|
# port_id is in the returned_obj. Otherwise on disassociate
|
|
# it's in the original_object
|
|
port_id = (returned_obj['floatingip'].get('port_id') or
|
|
original_obj.get('port_id'))
|
|
|
|
if port_id is None:
|
|
return
|
|
|
|
ctx = context.get_admin_context()
|
|
port = self._plugin.get_port(ctx, port_id)
|
|
|
|
if port and self._is_compute_port(port):
|
|
return self._get_network_changed_event(port['device_id'])
|
|
|
|
def record_port_status_changed(self, port, current_port_status,
|
|
previous_port_status, initiator):
|
|
"""Determine if nova needs to be notified due to port status change.
|
|
"""
|
|
# clear out previous _notify_event
|
|
port._notify_event = None
|
|
# If there is no device_id set there is nothing we can do here.
|
|
if not port.device_id:
|
|
LOG.debug(_("device_id is not set on port yet."))
|
|
return
|
|
|
|
if not port.id:
|
|
LOG.warning(_("Port ID not set! Nova will not be notified of "
|
|
"port status change."))
|
|
return
|
|
|
|
# We only want to notify about nova ports.
|
|
if not self._is_compute_port(port):
|
|
return
|
|
|
|
# We notify nova when a vif is unplugged which only occurs when
|
|
# the status goes from ACTIVE to DOWN.
|
|
if (previous_port_status == constants.PORT_STATUS_ACTIVE and
|
|
current_port_status == constants.PORT_STATUS_DOWN):
|
|
event_name = VIF_UNPLUGGED
|
|
|
|
# We only notify nova when a vif is plugged which only occurs
|
|
# when the status goes from:
|
|
# NO_VALUE/DOWN/BUILD -> ACTIVE/ERROR.
|
|
elif (previous_port_status in [sql_attr.NO_VALUE,
|
|
constants.PORT_STATUS_DOWN,
|
|
constants.PORT_STATUS_BUILD]
|
|
and current_port_status in [constants.PORT_STATUS_ACTIVE,
|
|
constants.PORT_STATUS_ERROR]):
|
|
event_name = VIF_PLUGGED
|
|
# All the remaining state transitions are of no interest to nova
|
|
else:
|
|
LOG.debug(_("Ignoring state change previous_port_status: "
|
|
"%(pre_status)s current_port_status: %(cur_status)s"
|
|
" port_id %(id)s") %
|
|
{'pre_status': previous_port_status,
|
|
'cur_status': current_port_status,
|
|
'id': port.id})
|
|
return
|
|
|
|
port._notify_event = (
|
|
{'server_uuid': port.device_id,
|
|
'name': event_name,
|
|
'status': NEUTRON_NOVA_EVENT_STATUS_MAP.get(current_port_status),
|
|
'tag': port.id})
|
|
|
|
def send_port_status(self, mapper, connection, port):
|
|
event = getattr(port, "_notify_event", None)
|
|
self.queue_event(event)
|
|
port._notify_event = None
|
|
|
|
def send_events(self):
|
|
if not self.pending_events:
|
|
return
|
|
|
|
batched_events = self.pending_events
|
|
self.pending_events = []
|
|
|
|
LOG.debug(_("Sending events: %s"), batched_events)
|
|
try:
|
|
response = self.nclient.server_external_events.create(
|
|
batched_events)
|
|
except nova_exceptions.NotFound:
|
|
LOG.warning(_("Nova returned NotFound for event: %s"),
|
|
batched_events)
|
|
except Exception:
|
|
LOG.exception(_("Failed to notify nova on events: %s"),
|
|
batched_events)
|
|
else:
|
|
if not isinstance(response, list):
|
|
LOG.error(_("Error response returned from nova: %s"),
|
|
response)
|
|
return
|
|
response_error = False
|
|
for event in response:
|
|
try:
|
|
code = event['code']
|
|
except KeyError:
|
|
response_error = True
|
|
continue
|
|
if code != 200:
|
|
LOG.warning(_("Nova event: %s returned with failed "
|
|
"status"), event)
|
|
else:
|
|
LOG.info(_("Nova event response: %s"), event)
|
|
if response_error:
|
|
LOG.error(_("Error response returned from nova: %s"),
|
|
response)
|