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
}
