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https://github.com/NVIDIA/nvidia-container-toolkit
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d4e21fdd10
A driverRoot defines both the driver library root and the root for device nodes. In the case of preinstalled drivers or the driver container, these are equal, but in cases such as GKE they do not match. In this case, drivers are extracted to a folder and devices exist at the root /. The changes here add a devRoot option to the nvcdi API that allows the parent of /dev to be specified explicitly. Signed-off-by: Evan Lezar <elezar@nvidia.com>
61 lines
2.2 KiB
Go
61 lines
2.2 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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// 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, image image.CUDA) (oci.SpecModifier, error) {
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if required, reason := requiresGraphicsModifier(image); !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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d, err := discover.NewGraphicsDiscoverer(
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logger,
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cfg,
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image.DevicesFromEnvvars(visibleDevicesEnvvar),
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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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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.DevicesFromEnvvars(visibleDevicesEnvvar); len(devices.List()) == 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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