func InitPreStart(dockerSocket string, id containers.Identifier, imageName string) error { var ( err error imgInfo *dc.Image d *docker.DockerClient ) _, socketActivationType, err := containers.GetSocketActivation(id) if err != nil { fmt.Printf("init_pre_start: Error while parsing unit file: %v\n", err) return err } if _, err = user.Lookup(id.LoginFor()); err != nil { if _, ok := err.(user.UnknownUserError); !ok { return err } if err = createUser(id); err != nil { return err } } if d, err = docker.GetConnection(dockerSocket); err != nil { return err } if imgInfo, err = d.GetImage(imageName); err != nil { return err } if err := os.MkdirAll(id.HomePath(), 0700); err != nil { return err } u, _ := user.Lookup(id.LoginFor()) volumes := make([]string, 0, 10) for volPath := range imgInfo.Config.Volumes { volumes = append(volumes, volPath) } user := imgInfo.Config.User if user == "" { user = "******" } ports, err := containers.GetExistingPorts(id) if err != nil { fmt.Printf("container init pre-start: Unable to retrieve port mapping\n") return err } containerData := containers.ContainerInitScript{ imgInfo.Config.User == "", user, u.Uid, u.Gid, strings.Join(imgInfo.Config.Cmd, " "), len(volumes) > 0, strings.Join(volumes, " "), ports, socketActivationType == "proxied", } file, _, err := utils.OpenFileExclusive(path.Join(id.RunPathFor(), "container-init.sh"), 0700) if err != nil { fmt.Printf("container init pre-start: Unable to open script file: %v\n", err) return err } defer file.Close() if erre := containers.ContainerInitTemplate.Execute(file, containerData); erre != nil { fmt.Printf("container init pre-start: Unable to output template: ", erre) return erre } if err := file.Close(); err != nil { return err } file, _, err = utils.OpenFileExclusive(path.Join(id.RunPathFor(), "container-cmd.sh"), 0705) if err != nil { fmt.Printf("container init pre-start: Unable to open cmd script file: %v\n", err) return err } defer file.Close() if erre := containers.ContainerCmdTemplate.Execute(file, containerData); erre != nil { fmt.Printf("container init pre-start: Unable to output cmd template: ", erre) return erre } if err := file.Close(); err != nil { return err } return nil }