mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-26 22:09:35 +00:00
9a697e340b
This adds support for updating crio configs (instead of installing hooks) and adds crio support to the nvidia-ctk runtime configure command. Signed-off-by: Evan Lezar <elezar@nvidia.com>
126 lines
3.4 KiB
Go
126 lines
3.4 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 crio
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import (
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"fmt"
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"os"
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"github.com/pelletier/go-toml"
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log "github.com/sirupsen/logrus"
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)
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// LoadConfig loads the cri-o config from disk
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func LoadConfig(config string) (*toml.Tree, error) {
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log.Infof("Loading config: %v", config)
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info, err := os.Stat(config)
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if os.IsExist(err) && info.IsDir() {
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return nil, fmt.Errorf("config file is a directory")
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}
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configFile := config
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if os.IsNotExist(err) {
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configFile = "/dev/null"
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log.Infof("Config file does not exist, creating new one")
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}
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cfg, err := toml.LoadFile(configFile)
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if err != nil {
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return nil, err
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}
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log.Infof("Successfully loaded config")
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return cfg, nil
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}
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// UpdateConfig updates the cri-o config to include the NVIDIA Container Runtime
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func UpdateConfig(config *toml.Tree, runtimeClass string, runtimePath string, setAsDefault bool) error {
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switch runc := config.Get("crio.runtime.runtimes.runc").(type) {
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case *toml.Tree:
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runc, _ = toml.Load(runc.String())
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config.SetPath([]string{"crio", "runtime", "runtimes", runtimeClass}, runc)
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}
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config.SetPath([]string{"crio", "runtime", "runtimes", runtimeClass, "runtime_path"}, runtimePath)
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config.SetPath([]string{"crio", "runtime", "runtimes", runtimeClass, "runtime_type"}, "oci")
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if setAsDefault {
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config.SetPath([]string{"crio", "runtime", "default_runtime"}, runtimeClass)
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}
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return nil
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}
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// RevertConfig reverts the cri-o config to remove the NVIDIA Container Runtime
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func RevertConfig(config *toml.Tree, runtimeClass string) error {
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if runtime, ok := config.GetPath([]string{"crio", "runtime", "default_runtime"}).(string); ok {
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if runtimeClass == runtime {
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config.DeletePath([]string{"crio", "runtime", "default_runtime"})
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}
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}
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runtimeClassPath := []string{"crio", "runtime", "runtimes", runtimeClass}
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config.DeletePath(runtimeClassPath)
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for i := 0; i < len(runtimeClassPath); i++ {
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remainingPath := runtimeClassPath[:len(runtimeClassPath)-i]
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if entry, ok := config.GetPath(remainingPath).(*toml.Tree); ok {
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if len(entry.Keys()) != 0 {
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break
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}
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config.DeletePath(remainingPath)
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}
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}
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return nil
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}
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// FlushConfig flushes the updated/reverted config out to disk
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func FlushConfig(config string, cfg *toml.Tree) error {
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log.Infof("Flushing config")
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output, err := cfg.ToTomlString()
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if err != nil {
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return fmt.Errorf("unable to convert to TOML: %v", err)
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}
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switch len(output) {
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case 0:
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err := os.Remove(config)
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if err != nil {
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return fmt.Errorf("unable to remove empty file: %v", err)
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}
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log.Infof("Config empty, removing file")
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default:
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f, err := os.Create(config)
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if err != nil {
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return fmt.Errorf("unable to open '%v' for writing: %v", config, err)
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}
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defer f.Close()
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_, err = f.WriteString(output)
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if err != nil {
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return fmt.Errorf("unable to write output: %v", err)
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}
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}
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log.Infof("Successfully flushed config")
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return nil
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}
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