// TODO(sgotti) I'm not sure setting default os and arch also for image
// dependencies is correct since it may break noarch dependencies. Reference:
// https://github.com/coreos/rkt/pull/2317
func (db *distBundle) setAppDefaults() error {
app := db.dist.(*dist.Appc).App()
if _, ok := app.Labels["arch"]; !ok {
app.Labels["arch"] = runtime.GOARCH
}
if _, ok := app.Labels["os"]; !ok {
app.Labels["os"] = runtime.GOOS
}
if err := types.IsValidOSArch(app.Labels, stage0.ValidOSArch); err != nil {
return errwrap.Wrap(fmt.Errorf("invalid Appc distribution %q", db.image), err)
}
db.dist = dist.NewAppcFromApp(app)
return nil
}
func newAppBundle(name string) (*appBundle, error) {
app, err := discovery.NewAppFromString(name)
if err != nil {
return nil, errwrap.Wrap(fmt.Errorf("invalid image name %q", name), err)
}
if _, ok := app.Labels["arch"]; !ok {
app.Labels["arch"] = runtime.GOARCH
}
if _, ok := app.Labels["os"]; !ok {
app.Labels["os"] = runtime.GOOS
}
if err := types.IsValidOSArch(app.Labels, stage0.ValidOSArch); err != nil {
return nil, errwrap.Wrap(fmt.Errorf("invalid image name %q", name), err)
}
bundle := &appBundle{
App: app,
Str: name,
}
return bundle, nil
}
// prepareAppImage renders and verifies the tree cache of the app image that
// corresponds to the given app name.
// When useOverlay is false, it attempts to render and expand the app image
func prepareAppImage(cfg PrepareConfig, appName types.ACName, img types.Hash, cdir string, useOverlay bool) error {
debug("Loading image %s", img.String())
am, err := cfg.Store.GetImageManifest(img.String())
if err != nil {
return errwrap.Wrap(errors.New("error getting the manifest"), err)
}
if _, hasOS := am.Labels.Get("os"); !hasOS {
return fmt.Errorf("missing os label in the image manifest")
}
if _, hasArch := am.Labels.Get("arch"); !hasArch {
return fmt.Errorf("missing arch label in the image manifest")
}
if err := types.IsValidOSArch(am.Labels.ToMap(), ValidOSArch); err != nil {
return err
}
appInfoDir := common.AppInfoPath(cdir, appName)
if err := os.MkdirAll(appInfoDir, defaultRegularDirPerm); err != nil {
return errwrap.Wrap(errors.New("error creating apps info directory"), err)
}
if useOverlay {
if cfg.PrivateUsers.Shift > 0 {
return fmt.Errorf("cannot use both overlay and user namespace: not implemented yet. (Try --no-overlay)")
}
treeStoreID, _, err := cfg.Store.RenderTreeStore(img.String(), false)
if err != nil {
return errwrap.Wrap(errors.New("error rendering tree image"), err)
}
if !cfg.SkipTreeStoreCheck {
hash, err := cfg.Store.CheckTreeStore(treeStoreID)
if err != nil {
log.PrintE("warning: tree cache is in a bad state: %v. Rebuilding...", err)
var err error
treeStoreID, hash, err = cfg.Store.RenderTreeStore(img.String(), true)
if err != nil {
return errwrap.Wrap(errors.New("error rendering tree image"), err)
}
}
cfg.CommonConfig.RootHash = hash
}
if err := ioutil.WriteFile(common.AppTreeStoreIDPath(cdir, appName), []byte(treeStoreID), defaultRegularFilePerm); err != nil {
return errwrap.Wrap(errors.New("error writing app treeStoreID"), err)
}
} else {
ad := common.AppPath(cdir, appName)
err := os.MkdirAll(ad, defaultRegularDirPerm)
if err != nil {
return errwrap.Wrap(errors.New("error creating image directory"), err)
}
shiftedUid, shiftedGid, err := cfg.PrivateUsers.ShiftRange(uint32(os.Getuid()), uint32(os.Getgid()))
if err != nil {
return errwrap.Wrap(errors.New("error getting uid, gid"), err)
}
if err := os.Chown(ad, int(shiftedUid), int(shiftedGid)); err != nil {
return errwrap.Wrap(fmt.Errorf("error shifting app %q's stage2 dir", appName), err)
}
if err := aci.RenderACIWithImageID(img, ad, cfg.Store, cfg.PrivateUsers); err != nil {
return errwrap.Wrap(errors.New("error rendering ACI"), err)
}
}
if err := writeManifest(*cfg.CommonConfig, img, appInfoDir); err != nil {
return err
}
return nil
}