mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-29 07:21:46 +00:00
127 lines
3.3 KiB
Go
127 lines
3.3 KiB
Go
/**
|
|
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
**/
|
|
|
|
package discover
|
|
|
|
import (
|
|
"fmt"
|
|
"path/filepath"
|
|
"sort"
|
|
"strings"
|
|
|
|
"github.com/NVIDIA/nvidia-container-toolkit/internal/lookup"
|
|
"github.com/container-orchestrated-devices/container-device-interface/pkg/cdi"
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
// NewLDCacheUpdateHook creates a discoverer that updates the ldcache for the specified mounts. A logger can also be specified
|
|
func NewLDCacheUpdateHook(logger *logrus.Logger, mounts Discover, cfg *Config) (Discover, error) {
|
|
d := ldconfig{
|
|
logger: logger,
|
|
mountsFrom: mounts,
|
|
lookup: lookup.NewExecutableLocator(logger, cfg.Root),
|
|
nvidiaCTKExecutablePath: cfg.NVIDIAContainerToolkitCLIExecutablePath,
|
|
}
|
|
|
|
return &d, nil
|
|
}
|
|
|
|
const (
|
|
nvidiaCTKDefaultFilePath = "/usr/bin/nvidia-ctk"
|
|
)
|
|
|
|
type ldconfig struct {
|
|
None
|
|
logger *logrus.Logger
|
|
mountsFrom Discover
|
|
lookup lookup.Locator
|
|
nvidiaCTKExecutablePath string
|
|
}
|
|
|
|
// Hooks checks the required mounts for libraries and returns a hook to update the LDcache for the discovered paths.
|
|
func (d ldconfig) Hooks() ([]Hook, error) {
|
|
mounts, err := d.mountsFrom.Mounts()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to discover mounts for ldcache update: %v", err)
|
|
}
|
|
|
|
libDirs := getLibDirs(mounts)
|
|
|
|
hookPath := nvidiaCTKDefaultFilePath
|
|
targets, err := d.lookup.Locate(d.nvidiaCTKExecutablePath)
|
|
if err != nil {
|
|
d.logger.Warnf("Failed to locate %v: %v", d.nvidiaCTKExecutablePath, err)
|
|
} else if len(targets) == 0 {
|
|
d.logger.Warnf("%v not found", d.nvidiaCTKExecutablePath)
|
|
} else {
|
|
d.logger.Debugf("Found %v candidates: %v", d.nvidiaCTKExecutablePath, targets)
|
|
hookPath = targets[0]
|
|
}
|
|
d.logger.Debugf("Using NVIDIA Container Toolkit CLI path %v", hookPath)
|
|
|
|
args := []string{hookPath, "hook", "update-ldcache"}
|
|
for _, f := range libDirs {
|
|
args = append(args, "--folder", f)
|
|
}
|
|
h := Hook{
|
|
Lifecycle: cdi.CreateContainerHook,
|
|
Path: hookPath,
|
|
Args: args,
|
|
}
|
|
|
|
return []Hook{h}, nil
|
|
}
|
|
|
|
// getLibDirs extracts the library dirs from the specified mounts
|
|
func getLibDirs(mounts []Mount) []string {
|
|
var paths []string
|
|
checked := make(map[string]bool)
|
|
|
|
for _, m := range mounts {
|
|
dir := filepath.Dir(m.Path)
|
|
if dir == "" {
|
|
continue
|
|
}
|
|
|
|
_, exists := checked[dir]
|
|
if exists {
|
|
continue
|
|
}
|
|
checked[dir] = isLibName(filepath.Base(m.Path))
|
|
|
|
if checked[dir] {
|
|
paths = append(paths, dir)
|
|
}
|
|
}
|
|
|
|
sort.Strings(paths)
|
|
|
|
return paths
|
|
}
|
|
|
|
// isLibName checks if the specified filename is a library (i.e. ends in `.so*`)
|
|
func isLibName(filename string) bool {
|
|
parts := strings.Split(filename, ".")
|
|
|
|
for _, p := range parts {
|
|
if p == "so" {
|
|
return true
|
|
}
|
|
}
|
|
|
|
return false
|
|
}
|