62 lines
2.6 KiB
Python
62 lines
2.6 KiB
Python
# 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 oslo.config import cfg
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from nova.scheduler import filters
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from nova.virt import hardware
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CONF = cfg.CONF
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CONF.import_opt('cpu_allocation_ratio', 'nova.scheduler.filters.core_filter')
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CONF.import_opt('ram_allocation_ratio', 'nova.scheduler.filters.ram_filter')
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class NUMATopologyFilter(filters.BaseHostFilter):
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"""Filter on requested NUMA topology."""
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def host_passes(self, host_state, filter_properties):
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ram_ratio = CONF.ram_allocation_ratio
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cpu_ratio = CONF.cpu_allocation_ratio
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request_spec = filter_properties.get('request_spec', {})
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instance = request_spec.get('instance_properties', {})
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instance_topology = hardware.instance_topology_from_instance(instance)
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host_topology, _fmt = hardware.host_topology_and_format_from_host(
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host_state)
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if instance_topology:
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if host_topology:
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if not hardware.VirtNUMAHostTopology.can_fit_instances(
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host_topology, [instance_topology]):
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return False
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limit_cells = []
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usage_after_instance = (
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hardware.VirtNUMAHostTopology.usage_from_instances(
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host_topology, [instance_topology]))
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for cell in usage_after_instance.cells:
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max_cell_memory = int(cell.memory * ram_ratio)
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max_cell_cpu = len(cell.cpuset) * cpu_ratio
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if (cell.memory_usage > max_cell_memory or
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cell.cpu_usage > max_cell_cpu):
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return False
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limit_cells.append(
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hardware.VirtNUMATopologyCellLimit(
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cell.id, cell.cpuset, cell.memory,
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max_cell_cpu, max_cell_memory))
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host_state.limits['numa_topology'] = (
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hardware.VirtNUMALimitTopology(
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cells=limit_cells).to_json())
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return True
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else:
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return False
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else:
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return True
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