abbec62620
This allows one to manage the checkpoints by using the `ctr image` command. The image is created with label "containerd.io/checkpoint". By default, it is not included in the output of `ctr images ls`. We can list the images by using the following command: $ ctr images ls labels.containerd.\"io/checkpoint\"==true Fixes #1026 Signed-off-by: Jacob Wen <jian.w.wen@oracle.com>
69 lines
1.4 KiB
Go
69 lines
1.4 KiB
Go
package main
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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/images"
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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 taskCheckpointCommand = cli.Command{
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Name: "checkpoint",
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Usage: "checkpoint a container",
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ArgsUsage: "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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},
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Action: func(context *cli.Context) error {
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var (
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ctx, cancel = appContext(context)
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id = context.Args().First()
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)
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defer cancel()
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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, err := newClient(context)
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if err != nil {
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return err
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}
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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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var opts []containerd.CheckpointTaskOpts
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if context.Bool("exit") {
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opts = append(opts, containerd.WithExit)
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}
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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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labels := map[string]string{
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"containerd.io/checkpoint": "true",
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}
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img := images.Image{
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Name: checkpoint.Digest.String(),
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Target: checkpoint,
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Labels: labels,
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}
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_, err = client.ImageService().Create(ctx, img)
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if err != nil {
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return err
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}
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fmt.Println(checkpoint.Digest.String())
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return nil
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},
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}
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