mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-26 22:09:35 +00:00
126 lines
3.4 KiB
Go
126 lines
3.4 KiB
Go
/**
|
|
# Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
**/
|
|
|
|
package crio
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
|
|
"github.com/pelletier/go-toml"
|
|
log "github.com/sirupsen/logrus"
|
|
)
|
|
|
|
// LoadConfig loads the cri-o config from disk
|
|
func LoadConfig(config string) (*toml.Tree, error) {
|
|
log.Infof("Loading config: %v", config)
|
|
|
|
info, err := os.Stat(config)
|
|
if os.IsExist(err) && info.IsDir() {
|
|
return nil, fmt.Errorf("config file is a directory")
|
|
}
|
|
|
|
configFile := config
|
|
if os.IsNotExist(err) {
|
|
configFile = "/dev/null"
|
|
log.Infof("Config file does not exist, creating new one")
|
|
}
|
|
|
|
cfg, err := toml.LoadFile(configFile)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
log.Infof("Successfully loaded config")
|
|
|
|
return cfg, nil
|
|
}
|
|
|
|
// UpdateConfig updates the cri-o config to include the NVIDIA Container Runtime
|
|
func UpdateConfig(config *toml.Tree, runtimeClass string, runtimePath string, setAsDefault bool) error {
|
|
switch runc := config.Get("crio.runtime.runtimes.runc").(type) {
|
|
case *toml.Tree:
|
|
runc, _ = toml.Load(runc.String())
|
|
config.SetPath([]string{"crio", "runtime", "runtimes", runtimeClass}, runc)
|
|
}
|
|
|
|
config.SetPath([]string{"crio", "runtime", "runtimes", runtimeClass, "runtime_path"}, runtimePath)
|
|
config.SetPath([]string{"crio", "runtime", "runtimes", runtimeClass, "runtime_type"}, "oci")
|
|
|
|
if setAsDefault {
|
|
config.SetPath([]string{"crio", "runtime", "default_runtime"}, runtimeClass)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// RevertConfig reverts the cri-o config to remove the NVIDIA Container Runtime
|
|
func RevertConfig(config *toml.Tree, runtimeClass string) error {
|
|
if runtime, ok := config.GetPath([]string{"crio", "runtime", "default_runtime"}).(string); ok {
|
|
if runtimeClass == runtime {
|
|
config.DeletePath([]string{"crio", "runtime", "default_runtime"})
|
|
}
|
|
}
|
|
|
|
runtimeClassPath := []string{"crio", "runtime", "runtimes", runtimeClass}
|
|
config.DeletePath(runtimeClassPath)
|
|
for i := 0; i < len(runtimeClassPath); i++ {
|
|
remainingPath := runtimeClassPath[:len(runtimeClassPath)-i]
|
|
if entry, ok := config.GetPath(remainingPath).(*toml.Tree); ok {
|
|
if len(entry.Keys()) != 0 {
|
|
break
|
|
}
|
|
config.DeletePath(remainingPath)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// FlushConfig flushes the updated/reverted config out to disk
|
|
func FlushConfig(config string, cfg *toml.Tree) error {
|
|
log.Infof("Flushing config")
|
|
|
|
output, err := cfg.ToTomlString()
|
|
if err != nil {
|
|
return fmt.Errorf("unable to convert to TOML: %v", err)
|
|
}
|
|
|
|
switch len(output) {
|
|
case 0:
|
|
err := os.Remove(config)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to remove empty file: %v", err)
|
|
}
|
|
log.Infof("Config empty, removing file")
|
|
default:
|
|
f, err := os.Create(config)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to open '%v' for writing: %v", config, err)
|
|
}
|
|
defer f.Close()
|
|
|
|
_, err = f.WriteString(output)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to write output: %v", err)
|
|
}
|
|
}
|
|
|
|
log.Infof("Successfully flushed config")
|
|
|
|
return nil
|
|
}
|