mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-12-01 16:52:54 +00:00
104 lines
3.1 KiB
Go
104 lines
3.1 KiB
Go
/**
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# Copyright (c) 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 discover
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import (
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"path/filepath"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/lookup"
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"github.com/container-orchestrated-devices/container-device-interface/pkg/cdi"
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"github.com/sirupsen/logrus"
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)
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const (
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nvidiaCTKExecutable = "nvidia-ctk"
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nvidiaCTKDefaultFilePath = "/usr/bin/nvidia-ctk"
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)
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var _ Discover = (*Hook)(nil)
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// Devices returns an empty list of devices for a Hook discoverer.
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func (h Hook) Devices() ([]Device, error) {
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return nil, nil
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}
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// Mounts returns an empty list of mounts for a Hook discoverer.
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func (h Hook) Mounts() ([]Mount, error) {
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return nil, nil
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}
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// Hooks allows the Hook type to also implement the Discoverer interface.
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// It returns a single hook
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func (h Hook) Hooks() ([]Hook, error) {
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return []Hook{h}, nil
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}
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// CreateCreateSymlinkHook creates a hook which creates a symlink from link -> target.
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func CreateCreateSymlinkHook(nvidiaCTKPath string, links []string) Discover {
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if len(links) == 0 {
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return None{}
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}
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var args []string
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for _, link := range links {
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args = append(args, "--link", link)
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}
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return CreateNvidiaCTKHook(
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nvidiaCTKPath,
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"create-symlinks",
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args...,
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)
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}
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// CreateNvidiaCTKHook creates a hook which invokes the NVIDIA Container CLI hook subcommand.
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func CreateNvidiaCTKHook(nvidiaCTKPath string, hookName string, additionalArgs ...string) Hook {
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return Hook{
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Lifecycle: cdi.CreateContainerHook,
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Path: nvidiaCTKPath,
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Args: append([]string{filepath.Base(nvidiaCTKPath), "hook", hookName}, additionalArgs...),
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}
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}
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// FindNvidiaCTK locates the nvidia-ctk executable to be used in hooks.
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// If an nvidia-ctk path is specified as an absolute path, it is used directly
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// without checking for existence of an executable at that path.
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func FindNvidiaCTK(logger *logrus.Logger, nvidiaCTKPath string) string {
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if filepath.IsAbs(nvidiaCTKPath) {
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logger.Debugf("Using specified NVIDIA Container Toolkit CLI path %v", nvidiaCTKPath)
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return nvidiaCTKPath
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}
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if nvidiaCTKPath == "" {
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nvidiaCTKPath = nvidiaCTKExecutable
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}
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logger.Debugf("Locating NVIDIA Container Toolkit CLI as %v", nvidiaCTKPath)
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lookup := lookup.NewExecutableLocator(logger, "")
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hookPath := nvidiaCTKDefaultFilePath
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targets, err := lookup.Locate(nvidiaCTKPath)
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if err != nil {
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logger.Warnf("Failed to locate %v: %v", nvidiaCTKPath, err)
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} else if len(targets) == 0 {
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logger.Warnf("%v not found", nvidiaCTKPath)
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} else {
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logger.Debugf("Found %v candidates: %v", nvidiaCTKPath, targets)
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hookPath = targets[0]
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}
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logger.Debugf("Using NVIDIA Container Toolkit CLI path %v", hookPath)
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return hookPath
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}
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