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Create checkpointed image in client

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Allow a user provided name for the checkpoint as well as a default
generated name for the checkpoint image.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This commit is contained in:
Michael Crosby 2017-10-17 12:05:11 -04:00
parent a19fd6ed6e
commit e201be5196
8 changed files with 73 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
cmd/ctr/checkpoint.go
View File

@ -4,7 +4,6 @@ import (
"fmt"
"github.com/containerd/containerd"
"github.com/containerd/containerd/images"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
@ -49,20 +48,7 @@ var taskCheckpointCommand = cli.Command{
if err != nil {
return err
}
labels := map[string]string{
"containerd.io/checkpoint": "true",
}
img := images.Image{
Name: checkpoint.Digest.String(),
Target: checkpoint,
Labels: labels,
}
_, err = client.ImageService().Create(ctx, img)
if err != nil {
return err
}
fmt.Println(checkpoint.Digest.String())
fmt.Println(checkpoint.Name())
return nil
},
}

9
cmd/ctr/run.go
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@ -9,7 +9,6 @@ import (
"github.com/containerd/console"
"github.com/containerd/containerd"
"github.com/containerd/containerd/containers"
digest "github.com/opencontainers/go-digest"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
@ -97,7 +96,6 @@ var runCommand = cli.Command{
Action: func(context *cli.Context) error {
var (
err error
checkpointIndex digest.Digest
ctx, cancel = appContext(context)
id = context.Args().Get(1)
@ -112,11 +110,6 @@ var runCommand = cli.Command{
if id == "" {
return errors.New("container id must be provided")
}
if raw := context.String("checkpoint"); raw != "" {
if checkpointIndex, err = digest.Parse(raw); err != nil {
return err
}
}
client, err := newClient(context)
if err != nil {
return err
@ -128,7 +121,7 @@ var runCommand = cli.Command{
if context.Bool("rm") {
defer container.Delete(ctx, containerd.WithSnapshotCleanup)
}
task, err := newTask(ctx, container, checkpointIndex, tty)
task, err := newTask(ctx, client, container, context.String("checkpoint"), tty)
if err != nil {
return err
}

20
cmd/ctr/run_unix.go
View File

@ -11,8 +11,6 @@ import (
"github.com/containerd/console"
"github.com/containerd/containerd"
digest "github.com/opencontainers/go-digest"
"github.com/opencontainers/image-spec/specs-go/v1"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
@ -67,15 +65,11 @@ func newContainer(ctx gocontext.Context, client *containerd.Client, context *cli
)
if raw := context.String("checkpoint"); raw != "" {
checkpointIndex, err := digest.Parse(raw)
im, err := client.GetImage(ctx, raw)
if err != nil {
return nil, err
}
if checkpointIndex != "" {
return client.NewContainer(ctx, id, containerd.WithCheckpoint(v1.Descriptor{
Digest: checkpointIndex,
}, id))
}
return client.NewContainer(ctx, id, containerd.WithCheckpoint(im, id))
}
var (
@ -120,7 +114,7 @@ func newContainer(ctx gocontext.Context, client *containerd.Client, context *cli
return client.NewContainer(ctx, id, cOpts...)
}
func newTask(ctx gocontext.Context, container containerd.Container, checkpoint digest.Digest, tty bool) (containerd.Task, error) {
func newTask(ctx gocontext.Context, client *containerd.Client, container containerd.Container, checkpoint string, tty bool) (containerd.Task, error) {
if checkpoint == "" {
io := containerd.Stdio
if tty {
@ -128,7 +122,9 @@ func newTask(ctx gocontext.Context, container containerd.Container, checkpoint d
}
return container.NewTask(ctx, io)
}
return container.NewTask(ctx, containerd.Stdio, containerd.WithTaskCheckpoint(v1.Descriptor{
Digest: checkpoint,
}))
im, err := client.GetImage(ctx, checkpoint)
if err != nil {
return nil, err
}
return container.NewTask(ctx, containerd.Stdio, containerd.WithTaskCheckpoint(im))
}

3
cmd/ctr/run_windows.go
View File

@ -9,7 +9,6 @@ import (
"github.com/containerd/containerd/containers"
"github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/log"
digest "github.com/opencontainers/go-digest"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
@ -118,7 +117,7 @@ func newContainer(ctx gocontext.Context, client *containerd.Client, context *cli
)
}
func newTask(ctx gocontext.Context, container containerd.Container, _ digest.Digest, tty bool) (containerd.Task, error) {
func newTask(ctx gocontext.Context, client *containerd.Client, container containerd.Container, _ string, tty bool) (containerd.Task, error) {
io := containerd.Stdio
if tty {
io = containerd.StdioTerminal

3
cmd/ctr/start.go
View File

@ -2,7 +2,6 @@ package main
import (
"github.com/containerd/console"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
@ -41,7 +40,7 @@ var taskStartCommand = cli.Command{
tty := spec.Process.Terminal
task, err := newTask(ctx, container, digest.Digest(""), tty)
task, err := newTask(ctx, client, container, "", tty)
if err != nil {
return err
}

12
container_opts_unix.go
View File

@ -24,11 +24,14 @@ import (
// WithCheckpoint allows a container to be created from the checkpointed information
// provided by the descriptor. The image, snapshot, and runtime specifications are
// restored on the container
func WithCheckpoint(desc v1.Descriptor, snapshotKey string) NewContainerOpts {
func WithCheckpoint(im Image, snapshotKey string) NewContainerOpts {
// set image and rw, and spec
return func(ctx context.Context, client *Client, c *containers.Container) error {
id := desc.Digest
store := client.ContentStore()
var (
desc = im.Target()
id = desc.Digest
store = client.ContentStore()
)
index, err := decodeIndex(ctx, store, id)
if err != nil {
return err
@ -85,8 +88,9 @@ func WithCheckpoint(desc v1.Descriptor, snapshotKey string) NewContainerOpts {
// WithTaskCheckpoint allows a task to be created with live runtime and memory data from a
// previous checkpoint. Additional software such as CRIU may be required to
// restore a task from a checkpoint
func WithTaskCheckpoint(desc v1.Descriptor) NewTaskOpts {
func WithTaskCheckpoint(im Image) NewTaskOpts {
return func(ctx context.Context, c *Client, info *TaskInfo) error {
desc := im.Target()
id := desc.Digest
index, err := decodeIndex(ctx, c.ContentStore(), id)
if err != nil {

57
task.go
View File

@ -17,6 +17,7 @@ import (
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/diff"
"github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/log"
"github.com/containerd/containerd/mount"
"github.com/containerd/containerd/plugin"
@ -88,6 +89,7 @@ func WithStdinCloser(r *IOCloseInfo) {
// CheckpointTaskInfo allows specific checkpoint information to be set for the task
type CheckpointTaskInfo struct {
Name string
// ParentCheckpoint is the digest of a parent checkpoint
ParentCheckpoint digest.Digest
// Options hold runtime specific settings for checkpointing a task
@ -124,7 +126,7 @@ type Task interface {
// OCI Index that can be push and pulled from a remote resource.
//
// Additional software like CRIU maybe required to checkpoint and restore tasks
Checkpoint(context.Context, ...CheckpointTaskOpts) (v1.Descriptor, error)
Checkpoint(context.Context, ...CheckpointTaskOpts) (Image, error)
// Update modifies executing tasks with updated settings
Update(context.Context, ...UpdateTaskOpts) error
// LoadProcess loads a previously created exec'd process
@ -350,46 +352,73 @@ func (t *task) Resize(ctx context.Context, w, h uint32) error {
return errdefs.FromGRPC(err)
}
func (t *task) Checkpoint(ctx context.Context, opts ...CheckpointTaskOpts) (d v1.Descriptor, err error) {
func (t *task) Checkpoint(ctx context.Context, opts ...CheckpointTaskOpts) (Image, error) {
request := &tasks.CheckpointTaskRequest{
ContainerID: t.id,
}
var i CheckpointTaskInfo
for _, o := range opts {
if err := o(&i); err != nil {
return d, err
return nil, err
}
}
const checkpointDateFormat = "01-02-2006-15:04:05"
// set a default name
if i.Name == "" {
i.Name = fmt.Sprintf("io.containerd/checkpoint/%s:%s", t.id, time.Now().Format(checkpointDateFormat))
}
request.ParentCheckpoint = i.ParentCheckpoint
if i.Options != nil {
any, err := typeurl.MarshalAny(i.Options)
if err != nil {
return d, err
return nil, err
}
request.Options = any
}
// make sure we pause it and resume after all other filesystem operations are completed
if err := t.Pause(ctx); err != nil {
return d, err
return nil, err
}
defer t.Resume(ctx)
cr, err := t.client.ContainerService().Get(ctx, t.id)
if err != nil {
return d, err
return nil, err
}
index := v1.Index{
Annotations: make(map[string]string),
}
var index v1.Index
if err := t.checkpointTask(ctx, &index, request); err != nil {
return d, err
return nil, err
}
if cr.Image != "" {
if err := t.checkpointImage(ctx, &index, cr.Image); err != nil {
return d, err
return nil, err
}
if err := t.checkpointRWSnapshot(ctx, &index, cr.Snapshotter, cr.SnapshotKey); err != nil {
return d, err
}
index.Annotations = make(map[string]string)
index.Annotations["image.name"] = cr.Image
return t.writeIndex(ctx, &index)
}
if cr.SnapshotKey != "" {
if err := t.checkpointRWSnapshot(ctx, &index, cr.Snapshotter, cr.SnapshotKey); err != nil {
return nil, err
}
}
desc, err := t.writeIndex(ctx, &index)
if err != nil {
return nil, err
}
im := images.Image{
Name: i.Name,
Target: desc,
Labels: map[string]string{
"containerd.io/checkpoint": "true",
},
}
if im, err = t.client.ImageService().Create(ctx, im); err != nil {
return nil, err
}
return &image{
client: t.client,
i: im,
}, nil
}
// UpdateTaskInfo allows updated specific settings to be changed on a task

8
task_opts.go
View File

@ -28,6 +28,14 @@ func WithExit(r *CheckpointTaskInfo) error {
return nil
}
// WithCheckpointName sets the image name for the checkpoint
func WithCheckpointName(name string) CheckpointTaskOpts {
return func(r *CheckpointTaskInfo) error {
r.Name = name
return nil
}
}
// ProcessDeleteOpts allows the caller to set options for the deletion of a task
type ProcessDeleteOpts func(context.Context, Process) error