mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 16:29:18 +00:00
137 lines
3.5 KiB
Go
137 lines
3.5 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/NVIDIA/nvidia-container-toolkit/pkg/config/engine"
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"github.com/pelletier/go-toml"
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)
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// Config represents the cri-o config
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type Config toml.Tree
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// New creates a cri-o config with the specified options
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func New(opts ...Option) (engine.Interface, error) {
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b := &builder{}
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for _, opt := range opts {
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opt(b)
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}
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return b.build()
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}
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// AddRuntime adds a new runtime to the crio config
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func (c *Config) AddRuntime(name string, path string, setAsDefault bool) error {
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if c == nil {
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return fmt.Errorf("config is nil")
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}
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config := (toml.Tree)(*c)
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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", name}, runc)
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}
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config.SetPath([]string{"crio", "runtime", "runtimes", name, "runtime_path"}, path)
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config.SetPath([]string{"crio", "runtime", "runtimes", name, "runtime_type"}, "oci")
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if setAsDefault {
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config.SetPath([]string{"crio", "runtime", "default_runtime"}, name)
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}
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*c = (Config)(config)
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return nil
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}
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// DefaultRuntime returns the default runtime for the cri-o config
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func (c Config) DefaultRuntime() string {
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config := (toml.Tree)(c)
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if runtime, ok := config.GetPath([]string{"crio", "runtime", "default_runtime"}).(string); ok {
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return runtime
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}
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return ""
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}
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// RemoveRuntime removes a runtime from the cri-o config
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func (c *Config) RemoveRuntime(name string) error {
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if c == nil {
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return nil
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}
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config := (toml.Tree)(*c)
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if runtime, ok := config.GetPath([]string{"crio", "runtime", "default_runtime"}).(string); ok {
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if runtime == name {
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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", name}
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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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*c = (Config)(config)
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return nil
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}
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// Save writes the config to the specified path
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func (c Config) Save(path string) (int64, error) {
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config := (toml.Tree)(c)
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output, err := config.ToTomlString()
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if err != nil {
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return 0, fmt.Errorf("unable to convert to TOML: %v", err)
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}
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if path == "" {
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os.Stdout.WriteString(fmt.Sprintf("%s\n", output))
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return int64(len(output)), nil
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}
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if len(output) == 0 {
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err := os.Remove(path)
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if err != nil {
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return 0, fmt.Errorf("unable to remove empty file: %v", err)
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}
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return 0, nil
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}
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f, err := os.Create(path)
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if err != nil {
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return 0, fmt.Errorf("unable to open '%v' for writing: %v", path, err)
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}
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defer f.Close()
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n, err := f.WriteString(output)
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if err != nil {
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return 0, fmt.Errorf("unable to write output: %v", err)
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}
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return int64(n), err
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}
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