mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 16:29:18 +00:00
120 lines
3.7 KiB
Go
120 lines
3.7 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 config
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import (
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"fmt"
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"io"
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"os"
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"path"
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"github.com/pelletier/go-toml"
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)
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const (
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configOverride = "XDG_CONFIG_HOME"
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configFilePath = "nvidia-container-runtime/config.toml"
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)
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var (
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// DefaultExecutableDir specifies the default path to use for executables if they cannot be located in the path.
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DefaultExecutableDir = "/usr/bin"
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// NVIDIAContainerRuntimeHookExecutable is the executable name for the NVIDIA Container Runtime Hook
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NVIDIAContainerRuntimeHookExecutable = "nvidia-container-runtime-hook"
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// NVIDIAContainerToolkitExecutable is the executable name for the NVIDIA Container Toolkit (an alias for the NVIDIA Container Runtime Hook)
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NVIDIAContainerToolkitExecutable = "nvidia-container-toolkit"
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configDir = "/etc/"
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)
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// Config represents the contents of the config.toml file for the NVIDIA Container Toolkit
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// Note: This is currently duplicated by the HookConfig in cmd/nvidia-container-toolkit/hook_config.go
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type Config struct {
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AcceptEnvvarUnprivileged bool `toml:"accept-nvidia-visible-devices-envvar-when-unprivileged"`
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NVIDIAContainerCLIConfig ContainerCLIConfig `toml:"nvidia-container-cli"`
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NVIDIACTKConfig CTKConfig `toml:"nvidia-ctk"`
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NVIDIAContainerRuntimeConfig RuntimeConfig `toml:"nvidia-container-runtime"`
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}
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// GetConfig sets up the config struct. Values are read from a toml file
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// or set via the environment.
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func GetConfig() (*Config, error) {
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if XDGConfigDir := os.Getenv(configOverride); len(XDGConfigDir) != 0 {
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configDir = XDGConfigDir
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}
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configFilePath := path.Join(configDir, configFilePath)
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tomlFile, err := os.Open(configFilePath)
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if err != nil {
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return getDefaultConfig(), nil
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}
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defer tomlFile.Close()
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cfg, err := loadConfigFrom(tomlFile)
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if err != nil {
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return nil, fmt.Errorf("failed to read config values: %v", err)
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}
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return cfg, nil
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}
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// loadRuntimeConfigFrom reads the config from the specified Reader
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func loadConfigFrom(reader io.Reader) (*Config, error) {
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toml, err := toml.LoadReader(reader)
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if err != nil {
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return nil, err
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}
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return getConfigFrom(toml)
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}
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// getConfigFrom reads the nvidia container runtime config from the specified toml Tree.
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func getConfigFrom(toml *toml.Tree) (*Config, error) {
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cfg := getDefaultConfig()
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if toml == nil {
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return cfg, nil
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}
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cfg.AcceptEnvvarUnprivileged = toml.GetDefault("accept-nvidia-visible-devices-envvar-when-unprivileged", cfg.AcceptEnvvarUnprivileged).(bool)
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cfg.NVIDIAContainerCLIConfig = *getContainerCLIConfigFrom(toml)
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cfg.NVIDIACTKConfig = *getCTKConfigFrom(toml)
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runtimeConfig, err := getRuntimeConfigFrom(toml)
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if err != nil {
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return nil, fmt.Errorf("failed to load nvidia-container-runtime config: %v", err)
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}
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cfg.NVIDIAContainerRuntimeConfig = *runtimeConfig
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return cfg, nil
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}
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// getDefaultConfig defines the default values for the config
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func getDefaultConfig() *Config {
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c := Config{
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AcceptEnvvarUnprivileged: true,
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NVIDIAContainerCLIConfig: *getDefaultContainerCLIConfig(),
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NVIDIACTKConfig: *getDefaultCTKConfig(),
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NVIDIAContainerRuntimeConfig: *GetDefaultRuntimeConfig(),
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}
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return &c
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}
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