mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-25 13:35:00 +00:00
127 lines
3.3 KiB
Go
127 lines
3.3 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 discover
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import (
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"fmt"
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"path/filepath"
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"sort"
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"strings"
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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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// NewLDCacheUpdateHook creates a discoverer that updates the ldcache for the specified mounts. A logger can also be specified
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func NewLDCacheUpdateHook(logger *logrus.Logger, mounts Discover, cfg *Config) (Discover, error) {
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d := ldconfig{
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logger: logger,
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mountsFrom: mounts,
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lookup: lookup.NewExecutableLocator(logger, cfg.Root),
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nvidiaCTKExecutablePath: cfg.NVIDIAContainerToolkitCLIExecutablePath,
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}
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return &d, nil
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}
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const (
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nvidiaCTKDefaultFilePath = "/usr/bin/nvidia-ctk"
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)
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type ldconfig struct {
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None
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logger *logrus.Logger
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mountsFrom Discover
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lookup lookup.Locator
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nvidiaCTKExecutablePath string
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}
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// Hooks checks the required mounts for libraries and returns a hook to update the LDcache for the discovered paths.
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func (d ldconfig) Hooks() ([]Hook, error) {
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mounts, err := d.mountsFrom.Mounts()
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if err != nil {
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return nil, fmt.Errorf("failed to discover mounts for ldcache update: %v", err)
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}
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libDirs := getLibDirs(mounts)
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hookPath := nvidiaCTKDefaultFilePath
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targets, err := d.lookup.Locate(d.nvidiaCTKExecutablePath)
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if err != nil {
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d.logger.Warnf("Failed to locate %v: %v", d.nvidiaCTKExecutablePath, err)
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} else if len(targets) == 0 {
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d.logger.Warnf("%v not found", d.nvidiaCTKExecutablePath)
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} else {
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d.logger.Debugf("Found %v candidates: %v", d.nvidiaCTKExecutablePath, targets)
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hookPath = targets[0]
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}
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d.logger.Debugf("Using NVIDIA Container Toolkit CLI path %v", hookPath)
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args := []string{hookPath, "hook", "update-ldcache"}
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for _, f := range libDirs {
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args = append(args, "--folder", f)
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}
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h := Hook{
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Lifecycle: cdi.CreateContainerHook,
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Path: hookPath,
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Args: args,
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}
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return []Hook{h}, nil
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}
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// getLibDirs extracts the library dirs from the specified mounts
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func getLibDirs(mounts []Mount) []string {
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var paths []string
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checked := make(map[string]bool)
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for _, m := range mounts {
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dir := filepath.Dir(m.Path)
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if dir == "" {
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continue
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}
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_, exists := checked[dir]
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if exists {
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continue
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}
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checked[dir] = isLibName(filepath.Base(m.Path))
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if checked[dir] {
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paths = append(paths, dir)
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}
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}
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sort.Strings(paths)
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return paths
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}
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// isLibName checks if the specified filename is a library (i.e. ends in `.so*`)
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func isLibName(filename string) bool {
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parts := strings.Split(filename, ".")
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for _, p := range parts {
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if p == "so" {
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return true
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}
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}
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return false
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}
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