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OpenStack Index

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# Copyright (c) 2011-2013 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.

from nova import db

from nova.openstack.common.gettextutils import _

from nova.openstack.common import log as logging

from nova.scheduler import filters

LOG = logging.getLogger(__name__)

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class AggregateMultiTenancyIsolation(filters.BaseHostFilter):

"""Isolate tenants in specific aggregates."""

# Aggregate data and tenant do not change within a request

run_filter_once_per_request = True

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def host_passes(self, host_state, filter_properties):

"""If a host is in an aggregate that has the metadata key

"filter_tenant_id" it can only create instances from that tenant(s).

A host can be in different aggregates.

If a host doesn't belong to an aggregate with the metadata key

"filter_tenant_id" it can create instances from all tenants.

spec = filter_properties.get('request_spec', {})

props = spec.get('instance_properties', {})

tenant_id = props.get('project_id')

context = filter_properties['context'].elevated()

metadata = db.aggregate_metadata_get_by_host(context, host_state.host,

key="filter_tenant_id")

if metadata != {}:

if tenant_id not in metadata["filter_tenant_id"]:

LOG.debug(_("%s fails tenant id on aggregate"), host_state)