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# Copyright (c) 2011-2012 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 oslo.config import cfg
from nova.scheduler import filters
isolated_opts = [
cfg.ListOpt('isolated_images',
default=[],
help='Images to run on isolated host'),
cfg.ListOpt('isolated_hosts',
default=[],
help='Host reserved for specific images'),
]
CONF = cfg.CONF
CONF.register_opts(isolated_opts)
class IsolatedHostsFilter(filters.BaseHostFilter):
"""Returns host."""
def host_passes(self, host_state, filter_properties):
spec = filter_properties.get('request_spec', {})
props = spec.get('instance_properties', {})
image_ref = props.get('image_ref')
image_isolated = image_ref in CONF.isolated_images
host_isolated = host_state.host in CONF.isolated_hosts
return image_isolated == host_isolated
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