mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-25 21:39:10 +00:00
62 lines
1.9 KiB
Go
62 lines
1.9 KiB
Go
/**
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# Copyright (c) 2022, 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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"github.com/NVIDIA/nvidia-container-toolkit/internal/config"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/config/image"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/discover"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
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)
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const (
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nvidiaGDSEnvvar = "NVIDIA_GDS"
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)
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// NewGDSModifier creates the modifiers for GDS devices.
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// If the spec does not contain the NVIDIA_GDS=enabled environment variable no changes are made.
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func NewGDSModifier(logger logger.Interface, cfg *config.Config, ociSpec oci.Spec) (oci.SpecModifier, error) {
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rawSpec, err := ociSpec.Load()
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if err != nil {
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return nil, fmt.Errorf("failed to load OCI spec: %v", err)
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}
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image, err := image.NewCUDAImageFromSpec(rawSpec)
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if err != nil {
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return nil, err
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}
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if devices := image.DevicesFromEnvvars(visibleDevicesEnvvar); len(devices.List()) == 0 {
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logger.Infof("No modification required; no devices requested")
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return nil, nil
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}
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if gds, _ := image[nvidiaGDSEnvvar]; gds != "enabled" {
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return nil, nil
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}
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d, err := discover.NewGDSDiscoverer(logger, cfg.NVIDIAContainerCLIConfig.Root)
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if err != nil {
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return nil, fmt.Errorf("failed to construct discoverer for GDS devices: %v", err)
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}
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return NewModifierFromDiscoverer(logger, d)
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}
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