144 lines
3.3 KiB
Go
144 lines
3.3 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 containers
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import (
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"errors"
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"github.com/containerd/console"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/cio"
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"github.com/containerd/containerd/cmd/ctr/commands"
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"github.com/containerd/containerd/cmd/ctr/commands/tasks"
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"github.com/containerd/containerd/errdefs"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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)
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var restoreCommand = cli.Command{
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Name: "restore",
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Usage: "Restore a container from checkpoint",
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ArgsUsage: "CONTAINER REF",
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Flags: []cli.Flag{
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cli.BoolFlag{
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Name: "rw",
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Usage: "Restore the rw layer from the checkpoint",
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},
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cli.BoolFlag{
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Name: "live",
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Usage: "Restore the runtime and memory data from the checkpoint",
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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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ref := context.Args().Get(1)
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if ref == "" {
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return errors.New("ref must be provided")
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}
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client, ctx, cancel, err := commands.NewClient(context)
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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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checkpoint, err := client.GetImage(ctx, ref)
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if err != nil {
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if !errdefs.IsNotFound(err) {
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return err
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}
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// TODO (ehazlett): consider other options (always/never fetch)
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ck, err := client.Fetch(ctx, ref)
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if err != nil {
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return err
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}
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checkpoint = containerd.NewImage(client, ck)
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}
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opts := []containerd.RestoreOpts{
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containerd.WithRestoreImage,
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containerd.WithRestoreSpec,
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containerd.WithRestoreRuntime,
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}
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if context.Bool("rw") {
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opts = append(opts, containerd.WithRestoreRW)
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}
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ctr, err := client.Restore(ctx, id, checkpoint, opts...)
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if err != nil {
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return err
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}
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topts := []containerd.NewTaskOpts{}
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if context.Bool("live") {
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topts = append(topts, containerd.WithTaskCheckpoint(checkpoint))
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}
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spec, err := ctr.Spec(ctx)
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if err != nil {
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return err
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}
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useTTY := spec.Process.Terminal
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var con console.Console
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if useTTY {
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con = console.Current()
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defer con.Reset()
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if err := con.SetRaw(); err != nil {
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return err
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}
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}
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task, err := tasks.NewTask(ctx, client, ctr, "", con, false, "", []cio.Opt{}, topts...)
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if err != nil {
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return err
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}
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var statusC <-chan containerd.ExitStatus
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if useTTY {
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if statusC, err = task.Wait(ctx); err != nil {
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return err
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}
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}
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if err := task.Start(ctx); err != nil {
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return err
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}
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if !useTTY {
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return nil
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}
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if err := tasks.HandleConsoleResize(ctx, task, con); err != nil {
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logrus.WithError(err).Error("console resize")
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}
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status := <-statusC
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code, _, err := status.Result()
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if err != nil {
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return err
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}
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if _, err := task.Delete(ctx); err != nil {
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return err
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}
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if code != 0 {
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return cli.NewExitError("", int(code))
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}
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return nil
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},
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}
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