mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 16:29:18 +00:00
7d76243783
This change copies the code from container-config/cmd to
tools/container. This allows the code to be built and
added to the container image without additional refactoring.
As the configuration utilities are incorporated into the cmds
of the nvidia-container-toolkit, the code will be moved from tools.
Files copied from:
383587f766
Signed-off-by: Evan Lezar <elezar@nvidia.com>
117 lines
3.6 KiB
Go
117 lines
3.6 KiB
Go
/**
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# Copyright (c) 2020-2021, 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 main
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import (
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"github.com/pelletier/go-toml"
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)
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// UpdateReverter defines the interface for applying and reverting configurations
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type UpdateReverter interface {
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Update(o *options) error
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Revert(o *options) error
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}
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type config struct {
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*toml.Tree
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version int64
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cri string
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binaryKey string
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}
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// update adds the specified runtime class to the the containerd config.
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// if set-as default is specified, the runtime class is also set as the
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// default runtime.
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func (config *config) update(runtimeClass string, runtimeType string, runtimeBinary string, setAsDefault bool) {
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config.Set("version", config.version)
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runcPath := config.runcPath()
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runtimeClassPath := config.runtimeClassPath(runtimeClass)
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switch runc := config.GetPath(runcPath).(type) {
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case *toml.Tree:
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runc, _ = toml.Load(runc.String())
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config.SetPath(runtimeClassPath, runc)
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}
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config.initRuntime(runtimeClassPath, runtimeType, runtimeBinary)
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if setAsDefault {
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defaultRuntimeNamePath := config.defaultRuntimeNamePath()
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config.SetPath(defaultRuntimeNamePath, runtimeClass)
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}
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}
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// revert removes the configuration applied in an update call.
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func (config *config) revert(runtimeClass string) {
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runtimeClassPath := config.runtimeClassPath(runtimeClass)
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defaultRuntimeNamePath := config.defaultRuntimeNamePath()
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config.DeletePath(runtimeClassPath)
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if runtime, ok := config.GetPath(defaultRuntimeNamePath).(string); ok {
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if runtimeClass == runtime {
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config.DeletePath(defaultRuntimeNamePath)
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}
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}
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for i := 0; i < len(runtimeClassPath); i++ {
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if runtimes, ok := config.GetPath(runtimeClassPath[:len(runtimeClassPath)-i]).(*toml.Tree); ok {
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if len(runtimes.Keys()) == 0 {
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config.DeletePath(runtimeClassPath[:len(runtimeClassPath)-i])
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}
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}
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}
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if len(config.Keys()) == 1 && config.Keys()[0] == "version" {
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config.Delete("version")
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}
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}
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// initRuntime creates a runtime config if it does not exist and ensures that the
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// runtimes binary path is specified.
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func (config *config) initRuntime(path []string, runtimeType string, binary string) {
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if config.GetPath(path) == nil {
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config.SetPath(append(path, "runtime_type"), runtimeType)
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config.SetPath(append(path, "runtime_root"), "")
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config.SetPath(append(path, "runtime_engine"), "")
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config.SetPath(append(path, "privileged_without_host_devices"), false)
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}
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binaryPath := append(path, "options", config.binaryKey)
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config.SetPath(binaryPath, binary)
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}
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func (config config) runcPath() []string {
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return config.runtimeClassPath("runc")
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}
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func (config config) runtimeClassBinaryPath(runtimeClass string) []string {
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return append(config.runtimeClassPath(runtimeClass), "options", config.binaryKey)
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}
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func (config config) runtimeClassPath(runtimeClass string) []string {
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return append(config.containerdPath(), "runtimes", runtimeClass)
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}
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func (config config) defaultRuntimeNamePath() []string {
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return append(config.containerdPath(), "default_runtime_name")
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}
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func (config config) containerdPath() []string {
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return []string{"plugins", config.cri, "containerd"}
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}
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