53 lines
1.9 KiB
Python
53 lines
1.9 KiB
Python
# Copyright (c) 2013 ISP RAS.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from nova.openstack.common import log as logging
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from nova.scheduler import filters
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LOG = logging.getLogger(__name__)
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class PciPassthroughFilter(filters.BaseHostFilter):
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"""Pci Passthrough Filter based on PCI request
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Filter that schedules instances on a host if the host has devices
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to meet the device requests in the 'extra_specs' for the flavor.
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PCI resource tracker provides updated summary information about the
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PCI devices for each host, like::
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| [{"count": 5, "vendor_id": "8086", "product_id": "1520",
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| "extra_info":'{}'}],
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and VM requests PCI devices via PCI requests, like::
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| [{"count": 1, "vendor_id": "8086", "product_id": "1520",}].
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The filter checks if the host passes or not based on this information.
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"""
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def host_passes(self, host_state, filter_properties):
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"""Return true if the host has the required PCI devices."""
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pci_requests = filter_properties.get('pci_requests')
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if not pci_requests:
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return True
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if not host_state.pci_stats.support_requests(pci_requests.requests):
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LOG.debug("%(host_state)s doesn't have the required PCI devices"
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" (%(requests)s)",
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{'host_state': host_state, 'requests': pci_requests})
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return False
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return True
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