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Add support for specifying a checkpoint directory. (#245)

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Signed-off-by: Ross Boucher <rboucher@gmail.com>
This commit is contained in:
Ross Boucher 2016-05-25 20:42:37 -04:00 • committed by Michael Crosby
parent 76dd6710dc
commit e756ae42d1
10 changed files with 291 additions and 228 deletions
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40
runtime/container.go
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@ -22,7 +22,7 @@ type Container interface {
// Path returns the path to the bundle
Path() string
// Start starts the init process of the container
Start(checkpoint string, s Stdio) (Process, error)
Start(checkpointPath string, s Stdio) (Process, error)
// Exec starts another process in an existing container
Exec(string, specs.ProcessSpec, Stdio) (Process, error)
// Delete removes the container's state and any resources
@ -38,11 +38,11 @@ type Container interface {
// RemoveProcess removes the specified process from the container
RemoveProcess(string) error
// Checkpoints returns all the checkpoints for a container
Checkpoints() ([]Checkpoint, error)
Checkpoints(checkpointDir string) ([]Checkpoint, error)
// Checkpoint creates a new checkpoint
Checkpoint(Checkpoint) error
Checkpoint(checkpoint Checkpoint, checkpointDir string) error
// DeleteCheckpoint deletes the checkpoint for the provided name
DeleteCheckpoint(name string) error
DeleteCheckpoint(name string, checkpointDir string) error
// Labels are user provided labels for the container
Labels() []string
// Pids returns all pids inside the container
@ -290,8 +290,12 @@ func (c *container) Resume() error {
return nil
}
func (c *container) Checkpoints() ([]Checkpoint, error) {
dirs, err := ioutil.ReadDir(filepath.Join(c.bundle, "checkpoints"))
func (c *container) Checkpoints(checkpointDir string) ([]Checkpoint, error) {
if checkpointDir == "" {
checkpointDir = filepath.Join(c.bundle, "checkpoints")
}
dirs, err := ioutil.ReadDir(checkpointDir)
if err != nil {
return nil, err
}
@ -300,7 +304,7 @@ func (c *container) Checkpoints() ([]Checkpoint, error) {
if !d.IsDir() {
continue
}
path := filepath.Join(c.bundle, "checkpoints", d.Name(), "config.json")
path := filepath.Join(checkpointDir, d.Name(), "config.json")
data, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
@ -314,11 +318,16 @@ func (c *container) Checkpoints() ([]Checkpoint, error) {
return out, nil
}
func (c *container) Checkpoint(cpt Checkpoint) error {
if err := os.MkdirAll(filepath.Join(c.bundle, "checkpoints"), 0755); err != nil {
func (c *container) Checkpoint(cpt Checkpoint, checkpointDir string) error {
if checkpointDir == "" {
checkpointDir = filepath.Join(c.bundle, "checkpoints")
}
if err := os.MkdirAll(checkpointDir, 0755); err != nil {
return err
}
path := filepath.Join(c.bundle, "checkpoints", cpt.Name)
path := filepath.Join(checkpointDir, cpt.Name)
if err := os.Mkdir(path, 0755); err != nil {
return err
}
@ -360,11 +369,14 @@ func (c *container) Checkpoint(cpt Checkpoint) error {
return err
}
func (c *container) DeleteCheckpoint(name string) error {
return os.RemoveAll(filepath.Join(c.bundle, "checkpoints", name))
func (c *container) DeleteCheckpoint(name string, checkpointDir string) error {
if checkpointDir == "" {
checkpointDir = filepath.Join(c.bundle, "checkpoints")
}
return os.RemoveAll(filepath.Join(checkpointDir, name))
}
func (c *container) Start(checkpoint string, s Stdio) (Process, error) {
func (c *container) Start(checkpointPath string, s Stdio) (Process, error) {
processRoot := filepath.Join(c.root, c.id, InitProcessID)
if err := os.Mkdir(processRoot, 0755); err != nil {
return nil, err
@ -381,7 +393,7 @@ func (c *container) Start(checkpoint string, s Stdio) (Process, error) {
return nil, err
}
config := &processConfig{
checkpoint: checkpoint,
checkpoint: checkpointPath,
root: processRoot,
id: InitProcessID,
c: c,