func mountPodStage1(ts *treestore.Store, p *pkgPod.Pod) error { if !p.UsesOverlay() { return nil } s1Id, err := p.GetStage1TreeStoreID() if err != nil { return errwrap.Wrap(errors.New("error getting stage1 treeStoreID"), err) } s1rootfs := ts.GetRootFS(s1Id) stage1Dir := common.Stage1RootfsPath(p.Path()) overlayDir := filepath.Join(p.Path(), "overlay") imgDir := filepath.Join(overlayDir, s1Id) upperDir := filepath.Join(imgDir, "upper") workDir := filepath.Join(imgDir, "work") opts := fmt.Sprintf("lowerdir=%s,upperdir=%s,workdir=%s", s1rootfs, upperDir, workDir) if err := syscall.Mount("overlay", stage1Dir, "overlay", 0, opts); err != nil { return errwrap.Wrap(errors.New("error mounting stage1"), err) } return nil }