110 lines
2.6 KiB
Go
110 lines
2.6 KiB
Go
package daemon
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/docker/docker/api"
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"github.com/docker/docker/api/types"
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)
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var (
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validCheckpointNameChars = api.RestrictedNameChars
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validCheckpointNamePattern = api.RestrictedNamePattern
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)
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// CheckpointCreate checkpoints the process running in a container with CRIU
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func (daemon *Daemon) CheckpointCreate(name string, config types.CheckpointCreateOptions) error {
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container, err := daemon.GetContainer(name)
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if err != nil {
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return err
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}
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if !container.IsRunning() {
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return fmt.Errorf("Container %s not running", name)
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}
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var checkpointDir string
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if config.CheckpointDir != "" {
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checkpointDir = config.CheckpointDir
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} else {
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checkpointDir = container.CheckpointDir()
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}
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if !validCheckpointNamePattern.MatchString(config.CheckpointID) {
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return fmt.Errorf("Invalid checkpoint ID (%s), only %s are allowed", config.CheckpointID, validCheckpointNameChars)
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}
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err = daemon.containerd.CreateCheckpoint(container.ID, config.CheckpointID, checkpointDir, config.Exit)
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if err != nil {
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return fmt.Errorf("Cannot checkpoint container %s: %s", name, err)
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}
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daemon.LogContainerEvent(container, "checkpoint")
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return nil
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}
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// CheckpointDelete deletes the specified checkpoint
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func (daemon *Daemon) CheckpointDelete(name string, config types.CheckpointDeleteOptions) error {
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container, err := daemon.GetContainer(name)
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if err != nil {
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return err
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}
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var checkpointDir string
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if config.CheckpointDir != "" {
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checkpointDir = config.CheckpointDir
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} else {
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checkpointDir = container.CheckpointDir()
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}
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return os.RemoveAll(filepath.Join(checkpointDir, config.CheckpointID))
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}
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// CheckpointList lists all checkpoints of the specified container
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func (daemon *Daemon) CheckpointList(name string, config types.CheckpointListOptions) ([]types.Checkpoint, error) {
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var out []types.Checkpoint
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container, err := daemon.GetContainer(name)
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if err != nil {
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return nil, err
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}
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var checkpointDir string
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if config.CheckpointDir != "" {
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checkpointDir = config.CheckpointDir
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} else {
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checkpointDir = container.CheckpointDir()
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}
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if err := os.MkdirAll(checkpointDir, 0755); err != nil {
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return nil, err
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}
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dirs, err := ioutil.ReadDir(checkpointDir)
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if err != nil {
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return nil, err
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}
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for _, d := range dirs {
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if !d.IsDir() {
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continue
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}
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path := filepath.Join(checkpointDir, d.Name(), "config.json")
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data, err := ioutil.ReadFile(path)
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if err != nil {
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return nil, err
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}
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var cpt types.Checkpoint
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if err := json.Unmarshal(data, &cpt); err != nil {
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return nil, err
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}
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out = append(out, cpt)
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}
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return out, nil
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}
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