mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
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aca0c7bc5a
This change adds a Devices abstraction to the CUDA image utilities. This allows for checking whether a devices is selected, for example. Signed-off-by: Evan Lezar <elezar@nvidia.com>
68 lines
2.1 KiB
Go
68 lines
2.1 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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"strings"
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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/oci"
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"github.com/sirupsen/logrus"
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)
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// NewGraphicsModifier constructs a modifier that injects graphics-related modifications into an OCI runtime specification.
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// The value of the NVIDIA_DRIVER_CAPABILITIES environment variable is checked to determine if this modification should be made.
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func NewGraphicsModifier(logger *logrus.Logger, 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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var hasGraphics bool
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for _, c := range strings.Split(image["NVIDIA_DRIVER_CAPABILITIES"], ",") {
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if c == "graphics" || c == "all" {
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hasGraphics = true
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break
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}
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}
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if !hasGraphics {
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logger.Debugf("Capability %q not selected", "graphics")
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return nil, nil
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}
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d, err := discover.NewGraphicsDiscoverer(logger, cfg.NVIDIAContainerCLIConfig.Root)
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if err != nil {
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return nil, fmt.Errorf("failed to construct discoverer: %v", err)
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}
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return NewModifierFromDiscoverer(logger, d)
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}
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