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Container: Better serialization/reloading support

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This commit is contained in:
Andrea Luzzardi 2013-01-22 11:13:22 -08:00
parent 78c02daf47
commit 8e9bb02ce5
1 changed files with 16 additions and 20 deletions
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36
container.go
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@ -16,12 +16,15 @@ import (
type Container struct { type Container struct {
Id string Id string
Root string Root string
Created time.Time
Path string Path string
Args []string Args []string
*Config Config *Config
*Filesystem Filesystem *Filesystem
*State State *State
lxcConfigPath string lxcConfigPath string
cmd *exec.Cmd cmd *exec.Cmd
@ -38,6 +41,7 @@ func createContainer(id string, root string, command string, args []string, laye
container := &Container{ container := &Container{
Id: id, Id: id,
Root: root, Root: root,
Created: time.Now(),
Path: command, Path: command,
Args: args, Args: args,
Config: config, Config: config,
@ -52,7 +56,6 @@ func createContainer(id string, root string, command string, args []string, laye
if err := os.Mkdir(root, 0700); err != nil { if err := os.Mkdir(root, 0700); err != nil {
return nil, err return nil, err
} }
if err := container.save(); err != nil { if err := container.save(); err != nil {
return nil, err return nil, err
} }
@ -63,32 +66,23 @@ func createContainer(id string, root string, command string, args []string, laye
} }
func loadContainer(containerPath string) (*Container, error) { func loadContainer(containerPath string) (*Container, error) {
configPath := path.Join(containerPath, "config.json") data, err := ioutil.ReadFile(path.Join(containerPath, "config.json"))
fi, err := os.Open(configPath)
if err != nil { if err != nil {
return nil, err return nil, err
} }
defer fi.Close() var container *Container
enc := json.NewDecoder(fi) if err := json.Unmarshal(data, container); err != nil {
container := &Container{}
if err := enc.Decode(container); err != nil {
return nil, err return nil, err
} }
return container, nil return container, nil
} }
func (container *Container) save() error { func (container *Container) save() (err error) {
configPath := path.Join(container.Root, "config.json") data, err := json.Marshal(container)
fo, err := os.Create(configPath)
if err != nil { if err != nil {
return err return
} }
defer fo.Close() return ioutil.WriteFile(path.Join(container.Root, "config.json"), data, 0700)
enc := json.NewEncoder(fo)
if err := enc.Encode(container); err != nil {
return err
}
return nil
} }
func (container *Container) generateLXCConfig() error { func (container *Container) generateLXCConfig() error {
@ -125,6 +119,7 @@ func (container *Container) Start() error {
return err return err
} }
container.State.setRunning(container.cmd.Process.Pid) container.State.setRunning(container.cmd.Process.Pid)
container.save()
go container.monitor() go container.monitor()
// Wait until we are out of the STARTING state before returning // Wait until we are out of the STARTING state before returning
@ -189,6 +184,7 @@ func (container *Container) monitor() {
// Report status back // Report status back
container.State.setStopped(exitCode) container.State.setStopped(exitCode)
container.save()
} }
func (container *Container) kill() error { func (container *Container) kill() error {