4bccdcced1
Initial connectivity between the Nova compute node and the cascade_service. Change-Id: I9ba0b56c0c0641b73145153df277e6688c47bdf8
133 lines
4.1 KiB
Python
133 lines
4.1 KiB
Python
# Copyright 2015 Huawei Technologies Co., Ltd.
|
|
#
|
|
# 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 socket import gethostname
|
|
|
|
from oslo_config import cfg
|
|
|
|
from nova import exception
|
|
from nova import objects
|
|
from nova.scheduler import driver
|
|
from nova.scheduler.manager import SchedulerManager
|
|
|
|
from tricircle.common.utils import get_import_path
|
|
|
|
from tricircle.cascade_service import site_manager
|
|
from tricircle.cascade_service.compute import NovaService
|
|
|
|
cfg.CONF.import_opt('scheduler_topic', 'nova.scheduler.rpcapi')
|
|
|
|
_REPORT_INTERVAL = 30
|
|
_REPORT_INTERVAL_MAX = 60
|
|
|
|
|
|
def _get_import_path(klass):
|
|
return "%s.%s" % (klass.__module__, klass.__name__)
|
|
|
|
|
|
def create_server():
|
|
return NovaService(
|
|
host=gethostname(),
|
|
binary="nova-scheduler",
|
|
topic="scheduler", # TODO(saggi): get from conf
|
|
db_allowed=False,
|
|
periodic_enable=True,
|
|
report_interval=_REPORT_INTERVAL,
|
|
periodic_interval_max=_REPORT_INTERVAL_MAX,
|
|
manager=get_import_path(SchedulerManager),
|
|
scheduler_driver=get_import_path(TricircleSchedulerDriver),
|
|
)
|
|
|
|
|
|
class _AvailabilityZone(object):
|
|
def __init__(self, name, host_manager):
|
|
self.name = name
|
|
self._host_manager = host_manager
|
|
self._site_manager = site_manager.get_instance()
|
|
|
|
@property
|
|
def host_aggregates(self):
|
|
for aggregate in self._host_manager.aggregates:
|
|
if aggregate.metadata[u'availability_zone'] == self.name:
|
|
yield aggregate
|
|
|
|
@property
|
|
def member_hosts(self):
|
|
for aggregate in self.host_aggregates:
|
|
for host in aggregate.hosts:
|
|
yield host
|
|
|
|
@property
|
|
def valid_sites(self):
|
|
for host in self.member_hosts:
|
|
yield self._site_manager.get_site(host)
|
|
|
|
|
|
class _HostManager(object):
|
|
def __init__(self):
|
|
self.aggregates = []
|
|
|
|
# Required methods from OpenStack interface
|
|
|
|
def update_aggregates(self, aggregates):
|
|
# This is not called reliably enough to trust
|
|
# we just reload the aggregates on every call
|
|
pass
|
|
|
|
def delete_aggregate(self, aggregate):
|
|
# This is not called reliably enough to trust
|
|
# we just reload the aggregates on every call
|
|
pass
|
|
|
|
def update_instance_info(self, context, host_name, instance_info):
|
|
pass
|
|
|
|
def delete_instance_info(self, context, host_name, instance_uuid):
|
|
pass
|
|
|
|
def sync_instance_info(self, context, host_name, instance_uuids):
|
|
pass
|
|
|
|
# Tricircle only methods
|
|
|
|
def get_availability_zone(self, az_name):
|
|
return _AvailabilityZone(az_name, self)
|
|
|
|
def reload_aggregates(self, context):
|
|
self.aggregates = objects.AggregateList.get_all(context)
|
|
|
|
|
|
class TricircleSchedulerDriver(driver.Scheduler):
|
|
def __init__(self):
|
|
super(TricircleSchedulerDriver, self).__init__()
|
|
self.host_manager = _HostManager()
|
|
self._site_manager = site_manager.get_instance()
|
|
|
|
def select_destinations(self, ctxt, request_spec, filter_properties):
|
|
self.host_manager.reload_aggregates(ctxt)
|
|
availability_zone = self.host_manager.get_availability_zone(
|
|
request_spec[u'instance_properties'][u'availability_zone'])
|
|
|
|
for site in availability_zone.valid_sites:
|
|
site.prepare_for_instance(request_spec, filter_properties)
|
|
return [{
|
|
'host': site.name,
|
|
'nodename': site.get_nodes()[0].hypervisor_hostname,
|
|
'limits': None,
|
|
}]
|
|
else:
|
|
raise exception.NoValidHost(
|
|
"No sites match requested availability zone")
|