47 lines
1.7 KiB
Python
47 lines
1.7 KiB
Python
# Copyright (c) 2014 ThoughtWorks
|
|
# 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 oslo.config import cfg
|
|
from nova import db
|
|
from nova.openstack.common import log as logging
|
|
from nova.scheduler import filters
|
|
|
|
opts = [
|
|
cfg.BoolOpt('cloud_burst',
|
|
help='Switch to enable could bursting'),
|
|
cfg.StrOpt('cloud_burst_availability_zone',
|
|
help='The availability zone of only compute hosts with the public cloud driver'),
|
|
]
|
|
CONF = cfg.CONF
|
|
CONF.register_opts(opts)
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
class CloudBurstFilter(filters.BaseHostFilter):
|
|
"""Filter for cloud burst availability zone"""
|
|
|
|
run_filter_once_per_request = True
|
|
|
|
def host_passes(self, host_state, filter_properties):
|
|
context = filter_properties['context'].elevated()
|
|
metadata = db.aggregate_metadata_get_by_host(context, host_state.host, key='availability_zone')
|
|
|
|
if CONF.cloud_burst:
|
|
return CONF.cloud_burst_availability_zone in metadata['availability_zone']
|
|
else:
|
|
return CONF.cloud_burst_availability_zone not in metadata['availability_zone']
|
|
|
|
return True
|