mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2025-06-26 18:18:24 +00:00
9d7a707405
This change adds an opt-in feature for creating .so symlinks to all injected driver files in a contianer. If features.dot-so-symlinks = true is set in the config.toml, the creation of symlinks for driver files is enabled. This can also be triggered on a per-container basis using the envvar NVIDIA_DOT_SO_SYMLINKS=enabled. Signed-off-by: Evan Lezar <elezar@nvidia.com>
116 lines
3.0 KiB
Go
116 lines
3.0 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 dotsosymlinks
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import (
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/urfave/cli/v2"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/lookup"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/oci"
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)
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type command struct {
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logger logger.Interface
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}
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type config struct {
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containerSpec string
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driverVersion string
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}
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// NewCommand constructs a hook command with the specified logger
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func NewCommand(logger logger.Interface) *cli.Command {
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c := command{
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logger: logger,
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}
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return c.build()
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}
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// build
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func (m command) build() *cli.Command {
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cfg := config{}
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// Create the '' command
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c := cli.Command{
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Name: "create-dot-so-symlinks",
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Usage: "A hook to create .so symlinks in the container.",
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Action: func(c *cli.Context) error {
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return m.run(c, &cfg)
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},
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}
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c.Flags = []cli.Flag{
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&cli.StringFlag{
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Name: "container-spec",
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Usage: "Specify the path to the OCI container spec. If empty or '-' the spec will be read from STDIN",
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Destination: &cfg.containerSpec,
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},
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&cli.StringFlag{
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Name: "driver-version",
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Usage: "specify the driver version for which the symlinks are to be created. This assumes driver libraries have the .so.`VERSION` suffix.",
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Destination: &cfg.driverVersion,
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Required: true,
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},
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}
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return &c
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}
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func (m command) run(c *cli.Context, cfg *config) error {
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s, err := oci.LoadContainerState(cfg.containerSpec)
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if err != nil {
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return fmt.Errorf("failed to load container state: %v", err)
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}
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containerRoot, err := s.GetContainerRoot()
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if err != nil {
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return fmt.Errorf("failed to determined container root: %v", err)
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}
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locator := lookup.NewLibraryLocator(
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lookup.WithLogger(m.logger),
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lookup.WithRoot(containerRoot),
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lookup.WithOptional(true),
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)
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libs, err := locator.Locate("*.so." + cfg.driverVersion)
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if err != nil {
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return fmt.Errorf("failed to locate libraries for driver version %v: %v", cfg.driverVersion, err)
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}
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for _, lib := range libs {
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if !strings.HasSuffix(lib, ".so."+cfg.driverVersion) {
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continue
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}
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libSoPath := strings.TrimSuffix(lib, "."+cfg.driverVersion)
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libSoXPaths, err := filepath.Glob(libSoPath + ".[0-9]")
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if len(libSoXPaths) != 1 || err != nil {
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continue
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}
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err = os.Symlink(filepath.Base(libSoXPaths[0]), libSoPath)
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if err != nil {
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continue
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}
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}
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return nil
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}
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