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https://github.com/NVIDIA/nvidia-container-toolkit
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efae501834
This change adds support for an NVIDIA_NVSWITCH environment variable. When set to `enabled` this striggers the injection of all available /dev/nvidia-nvswitch* device nodes. Signed-off-by: Evan Lezar <elezar@nvidia.com>
80 lines
2.6 KiB
Go
80 lines
2.6 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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nvidiaMOFEDEnvvar = "NVIDIA_MOFED"
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nvidiaNVSWITCHEnvvar = "NVIDIA_NVSWITCH"
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)
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// NewFeatureGatedModifier creates the modifiers for optional features.
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// These include:
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//
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// NVIDIA_GDS=enabled
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// NVIDIA_MOFED=enabled
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// NVIDIA_NVSWITCH=enabled
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//
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// If not devices are selected, no changes are made.
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func NewFeatureGatedModifier(logger logger.Interface, cfg *config.Config, image image.CUDA) (oci.SpecModifier, error) {
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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 discoverers []discover.Discover
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driverRoot := cfg.NVIDIAContainerCLIConfig.Root
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devRoot := cfg.NVIDIAContainerCLIConfig.Root
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if image.Getenv(nvidiaGDSEnvvar) == "enabled" {
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d, err := discover.NewGDSDiscoverer(logger, driverRoot, devRoot)
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if err != nil {
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return nil, fmt.Errorf("failed to construct discoverer for GDS devices: %w", err)
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}
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discoverers = append(discoverers, d)
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}
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if image.Getenv(nvidiaMOFEDEnvvar) == "enabled" {
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d, err := discover.NewMOFEDDiscoverer(logger, devRoot)
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if err != nil {
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return nil, fmt.Errorf("failed to construct discoverer for MOFED devices: %w", err)
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}
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discoverers = append(discoverers, d)
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}
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if image.Getenv(nvidiaNVSWITCHEnvvar) == "enabled" {
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d, err := discover.NewNvSwitchDiscoverer(logger, devRoot)
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if err != nil {
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return nil, fmt.Errorf("failed to construct discoverer for NVSWITCH devices: %w", err)
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}
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discoverers = append(discoverers, d)
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}
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return NewModifierFromDiscoverer(logger, discover.Merge(discoverers...))
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}
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