mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 13:05:17 +00:00
113 lines
2.8 KiB
Go
113 lines
2.8 KiB
Go
package main
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import (
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"fmt"
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"log"
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"os"
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"path"
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"reflect"
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"strings"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/config"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/config/image"
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)
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const (
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configPath = "/etc/nvidia-container-runtime/config.toml"
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driverPath = "/run/nvidia/driver"
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)
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// HookConfig : options for the nvidia-container-runtime-hook.
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type HookConfig config.Config
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func getDefaultHookConfig() (HookConfig, error) {
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defaultCfg, err := config.GetDefault()
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if err != nil {
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return HookConfig{}, err
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}
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return *(*HookConfig)(defaultCfg), nil
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}
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// loadConfig loads the required paths for the hook config.
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func loadConfig() (*config.Config, error) {
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var configPaths []string
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var required bool
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if len(*configflag) != 0 {
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configPaths = append(configPaths, *configflag)
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required = true
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} else {
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configPaths = append(configPaths, path.Join(driverPath, configPath), configPath)
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}
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for _, p := range configPaths {
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cfg, err := config.New(
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config.WithConfigFile(p),
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config.WithRequired(true),
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)
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if err == nil {
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return cfg.Config()
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} else if os.IsNotExist(err) && !required {
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continue
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}
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return nil, fmt.Errorf("couldn't open required configuration file: %v", err)
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}
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return config.GetDefault()
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}
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func getHookConfig() (*HookConfig, error) {
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cfg, err := loadConfig()
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if err != nil {
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return nil, fmt.Errorf("failed to load config: %v", err)
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}
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config := (*HookConfig)(cfg)
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allSupportedDriverCapabilities := image.SupportedDriverCapabilities
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if config.SupportedDriverCapabilities == "all" {
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config.SupportedDriverCapabilities = allSupportedDriverCapabilities.String()
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}
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configuredCapabilities := image.NewDriverCapabilities(config.SupportedDriverCapabilities)
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// We ensure that the configured value is a subset of all supported capabilities
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if !allSupportedDriverCapabilities.IsSuperset(configuredCapabilities) {
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configName := config.getConfigOption("SupportedDriverCapabilities")
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log.Panicf("Invalid value for config option '%v'; %v (supported: %v)\n", configName, config.SupportedDriverCapabilities, allSupportedDriverCapabilities.String())
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}
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return config, nil
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}
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// getConfigOption returns the toml config option associated with the
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// specified struct field.
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func (c HookConfig) getConfigOption(fieldName string) string {
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t := reflect.TypeOf(c)
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f, ok := t.FieldByName(fieldName)
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if !ok {
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return fieldName
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}
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v, ok := f.Tag.Lookup("toml")
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if !ok {
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return fieldName
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}
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return v
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}
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// getSwarmResourceEnvvars returns the swarm resource envvars for the config.
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func (c *HookConfig) getSwarmResourceEnvvars() []string {
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if c.SwarmResource == "" {
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return nil
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}
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candidates := strings.Split(c.SwarmResource, ",")
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var envvars []string
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for _, c := range candidates {
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trimmed := strings.TrimSpace(c)
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if len(trimmed) > 0 {
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envvars = append(envvars, trimmed)
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}
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}
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return envvars
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}
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