517de47726
Note that previously several notification drivers created an admin context and embedded it in their messages. Those drivers now use the passed-in context instead if it's available. For blueprint novaplugins. Change-Id: Icb89030256022d0a68db4a147611fd37fe83316a
82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
# Copyright 2011 OpenStack LLC.
|
|
# 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.
|
|
|
|
from nova import context
|
|
from nova import db
|
|
from nova import log as logging
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
def notify(_context, message):
|
|
"""Look for specific compute manager events and interprete them
|
|
so as to keep the Capacity table up to date.
|
|
|
|
NOTE: the True/False return codes are only for testing.
|
|
"""
|
|
|
|
# The event_type must start with 'compute.instance.'
|
|
event_type = message.get('event_type', None)
|
|
preamble = 'compute.instance.'
|
|
if not event_type or not event_type.startswith(preamble):
|
|
return False
|
|
|
|
# Events we're interested in end with .start and .end
|
|
event = event_type[len(preamble):]
|
|
parts = event.split('.')
|
|
suffix = parts[-1].lower()
|
|
event = event[:(-len(suffix) - 1)]
|
|
|
|
if suffix not in ['start', 'end']:
|
|
return False
|
|
started = suffix == 'start'
|
|
ended = suffix == 'end'
|
|
|
|
if started and event == 'create':
|
|
# We've already updated this stuff in the scheduler. Don't redo the
|
|
# work here.
|
|
return False
|
|
|
|
work = 1 if started else -1
|
|
|
|
# Extract the host name from the publisher id ...
|
|
publisher_preamble = 'compute.'
|
|
publisher = message.get('publisher_id', None)
|
|
if not publisher or not publisher.startswith(publisher_preamble):
|
|
return False
|
|
host = publisher[len(publisher_preamble):]
|
|
|
|
# If we deleted an instance, make sure we reclaim the resources.
|
|
# We may need to do something explicit for rebuild/migrate.
|
|
free_ram_mb = 0
|
|
free_disk_gb = 0
|
|
vms = 0
|
|
if ended and event == 'delete':
|
|
vms = -1
|
|
payload = message.get('payload', {})
|
|
free_ram_mb = payload.get('memory_mb', 0)
|
|
free_disk_gb = payload.get('disk_gb', 0)
|
|
|
|
LOG.debug("EventType=%(event_type)s -> host %(host)s: "
|
|
"ram %(free_ram_mb)d, disk %(free_disk_gb)d, "
|
|
"work %(work)d, vms%(vms)d" % locals())
|
|
|
|
db.api.compute_node_utilization_update(context.get_admin_context(), host,
|
|
free_ram_mb_delta=free_ram_mb, free_disk_gb_delta=free_disk_gb,
|
|
work_delta=work, vm_delta=vms)
|
|
|
|
return True
|