mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2025-06-26 18:18:24 +00:00
107 lines
3.5 KiB
Go
107 lines
3.5 KiB
Go
/**
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# Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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**/
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package modifier
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import (
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"fmt"
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"tags.cncf.io/container-device-interface/pkg/parser"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/config"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/modifier/cdi"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
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"github.com/NVIDIA/nvidia-container-toolkit/pkg/nvcdi"
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"github.com/NVIDIA/nvidia-container-toolkit/pkg/nvcdi/spec"
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)
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const (
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automaticDeviceVendor = "runtime.nvidia.com"
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automaticDeviceClass = "gpu"
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automaticDeviceKind = automaticDeviceVendor + "/" + automaticDeviceClass
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)
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func newAutomaticCDISpecModifier(logger logger.Interface, cfg *config.Config, devices []string) (oci.SpecModifier, error) {
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logger.Debugf("Generating in-memory CDI specs for devices %v", devices)
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// TODO: We should try to load the kernel modules and create the device nodes here.
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// Failures should raise a warning and not error out.
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spec, err := generateAutomaticCDISpec(logger, cfg, devices)
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if err != nil {
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return nil, fmt.Errorf("failed to generate CDI spec: %w", err)
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}
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cdiModifier, err := cdi.New(
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cdi.WithLogger(logger),
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cdi.WithSpec(spec.Raw()),
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)
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if err != nil {
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return nil, fmt.Errorf("failed to construct CDI modifier: %w", err)
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}
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return cdiModifier, nil
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}
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func generateAutomaticCDISpec(logger logger.Interface, cfg *config.Config, devices []string) (spec.Interface, error) {
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cdilib, err := nvcdi.New(
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nvcdi.WithLogger(logger),
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nvcdi.WithNVIDIACDIHookPath(cfg.NVIDIACTKConfig.Path),
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nvcdi.WithDriverRoot(cfg.NVIDIAContainerCLIConfig.Root),
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nvcdi.WithVendor("runtime.nvidia.com"),
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nvcdi.WithClass("gpu"),
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)
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if err != nil {
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return nil, fmt.Errorf("failed to construct CDI library: %w", err)
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}
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identifiers := []string{}
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for _, device := range devices {
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_, _, id := parser.ParseDevice(device)
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identifiers = append(identifiers, id)
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}
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deviceSpecs, err := cdilib.GetDeviceSpecsByID(identifiers...)
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if err != nil {
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return nil, fmt.Errorf("failed to get CDI device specs: %w", err)
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}
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commonEdits, err := cdilib.GetCommonEdits()
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if err != nil {
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return nil, fmt.Errorf("failed to get common CDI spec edits: %w", err)
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}
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return spec.New(
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spec.WithDeviceSpecs(deviceSpecs),
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spec.WithEdits(*commonEdits.ContainerEdits),
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spec.WithVendor("runtime.nvidia.com"),
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spec.WithClass("gpu"),
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)
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}
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// filterAutomaticDevices searches for "automatic" device names in the input slice.
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// "Automatic" devices are a well-defined list of CDI device names which, when requested,
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// trigger the generation of a CDI spec at runtime. This removes the need to generate a
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// CDI spec on the system a-priori as well as keep it up-to-date.
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func filterAutomaticDevices(devices []string) []string {
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var automatic []string
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for _, device := range devices {
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vendor, class, _ := parser.ParseDevice(device)
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if vendor == automaticDeviceVendor && class == automaticDeviceClass {
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automatic = append(automatic, device)
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}
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}
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return automatic
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}
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