x/vmware-nsx
Code Issues Proposed changes
593aa60ee9
vmware-nsx/neutron/notifiers/nova.py
Edgar Magana 1c5f329623 Fix for multiple misspelled words 
In Neutron code, a few misspelled words have been found.
This commit fix them all to this date.

Change-Id: Ic11b8ec0adf83a6675f7295e557f436051aa26cd
Closes-Bug: 1323344
2014-05-23 17:07:56 -07:00

251 lines
9.6 KiB
Python
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# 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 initalized 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):
batched_events = []
for event in range(len(self.pending_events)):
batched_events.append(self.pending_events.pop())
if not batched_events:
return
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)
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