80 lines
2.7 KiB
Python
80 lines
2.7 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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devices_group = cfg.OptGroup(
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name='devices',
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title='physical or virtual device options')
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vgpu_opts = [
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cfg.ListOpt('enabled_vgpu_types',
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default=[],
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help="""
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The vGPU types enabled in the compute node.
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Some pGPUs (e.g. NVIDIA GRID K1) support different vGPU types. User can use
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this option to specify a list of enabled vGPU types that may be assigned to a
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guest instance.
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If more than one single vGPU type is provided, then for each *vGPU type* an
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additional section, ``[vgpu_$(VGPU_TYPE)]``, must be added to the configuration
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file. Each section then **must** be configured with a single configuration
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option, ``device_addresses``, which should be a list of PCI addresses
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corresponding to the physical GPU(s) to assign to this type.
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If one or more sections are missing (meaning that a specific type is not wanted
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to use for at least one physical GPU) or if no device addresses are provided,
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then Nova will only use the first type that was provided by
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``[devices]/enabled_vgpu_types``.
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If the same PCI address is provided for two different types, nova-compute will
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return an InvalidLibvirtGPUConfig exception at restart.
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An example is as the following::
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[devices]
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enabled_vgpu_types = nvidia-35, nvidia-36
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[vgpu_nvidia-35]
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device_addresses = 0000:84:00.0,0000:85:00.0
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[vgpu_nvidia-36]
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device_addresses = 0000:86:00.0
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""")
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]
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def register_opts(conf):
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conf.register_group(devices_group)
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conf.register_opts(vgpu_opts, group=devices_group)
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def register_dynamic_opts(conf):
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"""Register dynamically-generated options and groups.
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This must be called by the service that wishes to use the options **after**
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the initial configuration has been loaded.
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"""
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opt = cfg.ListOpt('device_addresses', default=[],
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item_type=cfg.types.String())
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# Register the '[vgpu_$(VGPU_TYPE)]/device_addresses' opts, implicitly
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# registering the '[vgpu_$(VGPU_TYPE)]' groups in the process
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for vgpu_type in conf.devices.enabled_vgpu_types:
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conf.register_opt(opt, group='vgpu_%s' % vgpu_type)
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def list_opts():
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return {devices_group: vgpu_opts}
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