mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 16:29:18 +00:00
80 lines
2.7 KiB
Go
80 lines
2.7 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/lookup/root"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
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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 logger.Interface, cfg *config.Config, containerImage image.CUDA, driver *root.Driver) (oci.SpecModifier, error) {
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if required, reason := requiresGraphicsModifier(containerImage); !required {
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logger.Infof("No graphics modifier required: %v", reason)
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return nil, nil
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}
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nvidiaCDIHookPath := cfg.NVIDIACTKConfig.Path
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mounts, err := discover.NewGraphicsMountsDiscoverer(
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logger,
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driver,
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nvidiaCDIHookPath,
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)
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if err != nil {
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return nil, fmt.Errorf("failed to create mounts discoverer: %v", err)
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}
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// In standard usage, the devRoot is the same as the driver.Root.
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devRoot := driver.Root
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drmNodes, err := discover.NewDRMNodesDiscoverer(
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logger,
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containerImage.DevicesFromEnvvars(image.EnvVarNvidiaVisibleDevices),
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devRoot,
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nvidiaCDIHookPath,
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)
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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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d := discover.Merge(
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drmNodes,
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mounts,
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)
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return NewModifierFromDiscoverer(logger, d)
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}
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// requiresGraphicsModifier determines whether a graphics modifier is required.
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func requiresGraphicsModifier(cudaImage image.CUDA) (bool, string) {
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if devices := cudaImage.VisibleDevicesFromEnvVar(); len(devices) == 0 {
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return false, "no devices requested"
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}
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if !cudaImage.GetDriverCapabilities().Any(image.DriverCapabilityGraphics, image.DriverCapabilityDisplay) {
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return false, "no required capabilities requested"
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}
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return true, ""
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}
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