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Engine: 'export' returns a raw archive of a container's filesystem

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This commit is contained in:
Solomon Hykes 2013-12-08 01:33:37 +00:00
parent 50f3a696bd
commit 9656cdf0c2
2 changed files with 24 additions and 11 deletions
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9
api.go
View file

@ -173,10 +173,11 @@ func getContainersExport(srv *Server, version float64, w http.ResponseWriter, r
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
if err := srv.ContainerExport(name, w); err != nil {
utils.Errorf("%s", err)
job := srv.Eng.Job("export", vars["name"])
if err := job.Stdout.Add(w); err != nil {
return err
}
if err := job.Run(); err != nil {
return err
}
return nil

26
server.go
View file

@ -70,6 +70,10 @@ func jobInitApi(job *engine.Job) engine.Status {
if srv.runtime.networkManager.bridgeNetwork != nil {
job.Eng.Hack_SetGlobalVar("httpapi.bridgeIP", srv.runtime.networkManager.bridgeNetwork.IP)
}
if err := job.Eng.Register("export", srv.ContainerExport); err != nil {
job.Error(err)
return engine.StatusErr
}
if err := job.Eng.Register("create", srv.ContainerCreate); err != nil {
job.Error(err)
return engine.StatusErr
@ -190,22 +194,30 @@ func (srv *Server) ContainerKill(name string, sig int) error {
return nil
}
func (srv *Server) ContainerExport(name string, out io.Writer) error {
func (srv *Server) ContainerExport(job *engine.Job) engine.Status {
if len(job.Args) != 1 {
job.Errorf("Usage: %s container_id", job.Name)
return engine.StatusErr
}
name := job.Args[0]
if container := srv.runtime.Get(name); container != nil {
data, err := container.Export()
if err != nil {
return err
job.Errorf("%s: %s", name, err)
return engine.StatusErr
}
// Stream the entire contents of the container (basically a volatile snapshot)
if _, err := io.Copy(out, data); err != nil {
return err
if _, err := io.Copy(job.Stdout, data); err != nil {
job.Errorf("%s: %s", name, err)
return engine.StatusErr
}
// FIXME: factor job-specific LogEvent to engine.Job.Run()
srv.LogEvent("export", container.ID, srv.runtime.repositories.ImageName(container.Image))
return nil
return engine.StatusOK
}
return fmt.Errorf("No such container: %s", name)
job.Errorf("No such container: %s", name)
return engine.StatusErr
}
// ImageExport exports all images with the given tag. All versions