6593399e9f
support checkpoint without committing a checkpoint dir into a checkpoint image and restore without untar image into checkpoint directory. support for both v1 and v2 runtime Signed-off-by: Ace-Tang <aceapril@126.com>
123 lines
3.1 KiB
Go
123 lines
3.1 KiB
Go
/*
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Copyright The containerd Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 tasks
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import (
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"fmt"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/cmd/ctr/commands"
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"github.com/containerd/containerd/runtime/linux/runctypes"
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"github.com/containerd/containerd/runtime/v2/runc/options"
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"github.com/pkg/errors"
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"github.com/urfave/cli"
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)
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var checkpointCommand = cli.Command{
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Name: "checkpoint",
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Usage: "checkpoint a container",
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ArgsUsage: "[flags] CONTAINER",
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Flags: []cli.Flag{
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cli.BoolFlag{
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Name: "exit",
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Usage: "stop the container after the checkpoint",
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},
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cli.StringFlag{
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Name: "image-path",
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Usage: "path to criu image files",
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},
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cli.StringFlag{
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Name: "work-path",
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Usage: "path to criu work files and logs",
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},
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},
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Action: func(context *cli.Context) error {
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id := context.Args().First()
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if id == "" {
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return errors.New("container id must be provided")
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}
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client, ctx, cancel, err := commands.NewClient(context, containerd.WithDefaultRuntime(context.String("runtime")))
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if err != nil {
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return err
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}
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defer cancel()
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container, err := client.LoadContainer(ctx, id)
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if err != nil {
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return err
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}
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task, err := container.Task(ctx, nil)
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if err != nil {
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return err
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}
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info, err := container.Info(ctx)
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if err != nil {
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return err
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}
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opts := []containerd.CheckpointTaskOpts{withCheckpointOpts(info.Runtime.Name, context)}
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checkpoint, err := task.Checkpoint(ctx, opts...)
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if err != nil {
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return err
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}
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if context.String("image-path") == "" {
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fmt.Println(checkpoint.Name())
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}
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return nil
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},
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}
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// withCheckpointOpts only suitable for runc runtime now
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func withCheckpointOpts(rt string, context *cli.Context) containerd.CheckpointTaskOpts {
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return func(r *containerd.CheckpointTaskInfo) error {
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imagePath := context.String("image-path")
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workPath := context.String("work-path")
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switch rt {
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case "io.containerd.runc.v1":
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if r.Options == nil {
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r.Options = &options.CheckpointOptions{}
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}
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opts, _ := r.Options.(*options.CheckpointOptions)
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if context.Bool("exit") {
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opts.Exit = true
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}
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if imagePath != "" {
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opts.ImagePath = imagePath
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}
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if workPath != "" {
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opts.WorkPath = workPath
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}
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case "io.containerd.runtime.v1.linux":
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if r.Options == nil {
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r.Options = &runctypes.CheckpointOptions{}
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}
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opts, _ := r.Options.(*runctypes.CheckpointOptions)
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if context.Bool("exit") {
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opts.Exit = true
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}
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if imagePath != "" {
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opts.ImagePath = imagePath
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}
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if workPath != "" {
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opts.WorkPath = workPath
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}
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}
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return nil
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}
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}
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