Пример #1
0
func (b *Builder) getStage1Manifest() (*schema.ImageManifest, error) {
	content, err := ioutil.ReadFile(rktcommon.Stage1ManifestPath(b.pod.Root))
	if err != nil {
		return nil, errs.WithEF(err, b.fields.WithField("file", rktcommon.Stage1ManifestPath(b.pod.Root)), "Failed to read stage1 manifest")
	}

	im := &schema.ImageManifest{}
	err = im.UnmarshalJSON(content)
	if err != nil {
		return nil, errs.WithEF(err, b.fields.WithField("content", string(content)).
			WithField("file", rktcommon.Stage1ManifestPath(b.pod.Root)), "Cannot unmarshall json content from file")
	}
	return im, nil
}
Пример #2
0
// getStage1Entrypoint retrieves the named entrypoint from the stage1 manifest for a given pod
func getStage1Entrypoint(cdir string, entrypoint string) (string, error) {
	b, err := ioutil.ReadFile(common.Stage1ManifestPath(cdir))
	if err != nil {
		return "", errwrap.Wrap(errors.New("error reading pod manifest"), err)
	}

	s1m := schema.ImageManifest{}
	if err := json.Unmarshal(b, &s1m); err != nil {
		return "", errwrap.Wrap(errors.New("error unmarshaling stage1 manifest"), err)
	}

	if ep, ok := s1m.Annotations.Get(entrypoint); ok {
		return ep, nil
	}

	return "", fmt.Errorf("entrypoint %q not found", entrypoint)
}
Пример #3
0
// supportsMutableEnvironment returns whether the given stage1 image supports mutable pod operations.
// It introspects the stage1 manifest and checks the presence of app* entrypoints.
func supportsMutableEnvironment(cdir string) (bool, error) {
	b, err := ioutil.ReadFile(common.Stage1ManifestPath(cdir))
	if err != nil {
		return false, errwrap.Wrap(errors.New("error reading pod manifest"), err)
	}

	s1m := schema.ImageManifest{}
	if err := json.Unmarshal(b, &s1m); err != nil {
		return false, errwrap.Wrap(errors.New("error unmarshaling stage1 manifest"), err)
	}

	_, appRmOk := s1m.Annotations.Get(appRmEntrypoint)
	_, appStartOk := s1m.Annotations.Get(appStartEntrypoint)
	_, appStopOk := s1m.Annotations.Get(appStopEntrypoint)

	return appRmOk && appStartOk && appStopOk, nil
}
Пример #4
0
// getStage1InterfaceVersion retrieves the interface version from the stage1
// manifest for a given pod
func getStage1InterfaceVersion(cdir string) (int, error) {
	b, err := ioutil.ReadFile(common.Stage1ManifestPath(cdir))
	if err != nil {
		return -1, errwrap.Wrap(errors.New("error reading pod manifest"), err)
	}

	s1m := schema.ImageManifest{}
	if err := json.Unmarshal(b, &s1m); err != nil {
		return -1, errwrap.Wrap(errors.New("error unmarshaling stage1 manifest"), err)
	}

	if iv, ok := s1m.Annotations.Get(interfaceVersion); ok {
		v, err := strconv.Atoi(iv)
		if err != nil {
			return -1, errwrap.Wrap(errors.New("error parsing interface version"), err)
		}
		return v, nil
	}

	// "interface-version" annotation not found, assume version 1
	return 1, nil
}