mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 16:29:18 +00:00
179d8655f9
This change creates an nvidia-cdi-hook binary for implementing CDI hooks. This allows for these hooks to be separated from the nvidia-ctk command which may, for example, require libnvidia-ml to support other functionality. The nvidia-ctk hook subcommand is maintained as an alias for the time being to allow for existing CDI specifications referring to this path to work as expected. Signed-off-by: Avi Deitcher <avi@deitcher.net>
81 lines
2.2 KiB
Go
81 lines
2.2 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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"tags.cncf.io/container-device-interface/pkg/cdi"
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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(nvidiaCDIHookPath 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 CreateNvidiaCDIHook(
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nvidiaCDIHookPath,
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"create-symlinks",
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args...,
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)
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}
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// CreateNvidiaCDIHook creates a hook which invokes the NVIDIA Container CLI hook subcommand.
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func CreateNvidiaCDIHook(nvidiaCDIHookPath string, hookName string, additionalArgs ...string) Hook {
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return cdiHook(nvidiaCDIHookPath).Create(hookName, additionalArgs...)
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}
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type cdiHook string
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func (c cdiHook) Create(name string, args ...string) Hook {
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return Hook{
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Lifecycle: cdi.CreateContainerHook,
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Path: string(c),
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Args: append(c.requiredArgs(name), args...),
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}
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}
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func (c cdiHook) requiredArgs(name string) []string {
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base := filepath.Base(string(c))
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if base == "nvidia-ctk" {
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return []string{base, "hook", name}
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}
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return []string{base, name}
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}
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