Golang util.IsReady函数代码示例

// SetUpAt creates new directory and clones a git repo.
func (b *gitRepoVolumeBuilder) SetUpAt(dir string) error {
	if volumeutil.IsReady(b.getMetaDir()) {
		return nil
	}

	// Wrap EmptyDir, let it do the setup.
	wrapped, err := b.plugin.host.NewWrapperBuilder(wrappedVolumeSpec, &b.pod, b.opts)
	if err != nil {
		return err
	}
	if err := wrapped.SetUpAt(dir); err != nil {
		return err
	}

	args := []string{"clone", b.source}

	if len(b.target) != 0 {
		args = append(args, b.target)
	}
	if output, err := b.execCommand("git", args, dir); err != nil {
		return fmt.Errorf("failed to exec 'git %s': %s: %v",
			strings.Join(args, " "), output, err)
	}

	files, err := ioutil.ReadDir(dir)
	if err != nil {
		return err
	}

	if len(b.revision) == 0 {
		// Done!
		volumeutil.SetReady(b.getMetaDir())
		return nil
	}

	var subdir string

	switch {
	case b.target == ".":
		// if target dir is '.', use the current dir
		subdir = path.Join(dir)
	case len(files) == 1:
		// if target is not '.', use the generated folder
		subdir = path.Join(dir, files[0].Name())
	default:
		// if target is not '.', but generated many files, it's wrong
		return fmt.Errorf("unexpected directory contents: %v", files)
	}

	if output, err := b.execCommand("git", []string{"checkout", b.revision}, subdir); err != nil {
		return fmt.Errorf("failed to exec 'git checkout %s': %s: %v", b.revision, output, err)
	}
	if output, err := b.execCommand("git", []string{"reset", "--hard"}, subdir); err != nil {
		return fmt.Errorf("failed to exec 'git reset --hard': %s: %v", output, err)
	}

	volumeutil.SetReady(b.getMetaDir())
	return nil
}

func (b *secretVolumeBuilder) SetUpAt(dir string, fsGroup *int64) error {
	notMnt, err := b.mounter.IsLikelyNotMountPoint(dir)
	// Getting an os.IsNotExist err from is a contingency; the directory
	// may not exist yet, in which case, setup should run.
	if err != nil && !os.IsNotExist(err) {
		return err
	}

	// If the plugin readiness file is present for this volume and
	// the setup dir is a mountpoint, this volume is already ready.
	if volumeutil.IsReady(b.getMetaDir()) && !notMnt {
		return nil
	}

	glog.V(3).Infof("Setting up volume %v for pod %v at %v", b.volName, b.pod.UID, dir)

	// Wrap EmptyDir, let it do the setup.
	wrapped, err := b.plugin.host.NewWrapperBuilder(b.volName, wrappedVolumeSpec, &b.pod, *b.opts)
	if err != nil {
		return err
	}
	if err := wrapped.SetUpAt(dir, fsGroup); err != nil {
		return err
	}

	kubeClient := b.plugin.host.GetKubeClient()
	if kubeClient == nil {
		return fmt.Errorf("Cannot setup secret volume %v because kube client is not configured", b.volName)
	}

	secret, err := kubeClient.Core().Secrets(b.pod.Namespace).Get(b.secretName)
	if err != nil {
		glog.Errorf("Couldn't get secret %v/%v", b.pod.Namespace, b.secretName)
		return err
	} else {
		totalBytes := totalSecretBytes(secret)
		glog.V(3).Infof("Received secret %v/%v containing (%v) pieces of data, %v total bytes",
			b.pod.Namespace,
			b.secretName,
			len(secret.Data),
			totalBytes)
	}

	for name, data := range secret.Data {
		hostFilePath := path.Join(dir, name)
		glog.V(3).Infof("Writing secret data %v/%v/%v (%v bytes) to host file %v", b.pod.Namespace, b.secretName, name, len(data), hostFilePath)
		err := b.writer.WriteFile(hostFilePath, data, 0444)
		if err != nil {
			glog.Errorf("Error writing secret data to host path: %v, %v", hostFilePath, err)
			return err
		}
	}

	volume.SetVolumeOwnership(b, fsGroup)

	volumeutil.SetReady(b.getMetaDir())

	return nil
}

// SetUpAt creates new directory.
func (ed *emptyDir) SetUpAt(dir string) error {
	isMnt, err := ed.mounter.IsMountPoint(dir)
	// Getting an os.IsNotExist err from is a contingency; the directory
	// may not exist yet, in which case, setup should run.
	if err != nil && !os.IsNotExist(err) {
		return err
	}

	// If the plugin readiness file is present for this volume, and the
	// storage medium is the default, then the volume is ready.  If the
	// medium is memory, and a mountpoint is present, then the volume is
	// ready.
	if volumeutil.IsReady(ed.getMetaDir()) {
		if ed.medium == api.StorageMediumMemory && isMnt {
			return nil
		} else if ed.medium == api.StorageMediumDefault {
			return nil
		}
	}

	// Determine the effective SELinuxOptions to use for this volume.
	securityContext := ""
	if selinuxEnabled() {
		securityContext, err = ed.determineEffectiveSELinuxOptions()
		if err != nil {
			return err
		}
	}

	switch ed.medium {
	case api.StorageMediumDefault:
		err = ed.setupDir(dir, securityContext)
	case api.StorageMediumMemory:
		err = ed.setupTmpfs(dir, securityContext)
	default:
		err = fmt.Errorf("unknown storage medium %q", ed.medium)
	}

	if err == nil {
		volumeutil.SetReady(ed.getMetaDir())
	}

	return err
}

/*
SetUpAt will setup a Flocker volume following this flow of calls to the Flocker
control service:

1. Get the dataset id for the given volume name/dir
2. It should already be there, if it's not the user needs to manually create it
3. Check the current Primary UUID
4. If it doesn't match with the Primary UUID that we got on 2, then we will
   need to update the Primary UUID for this volume.
5. Wait until the Primary UUID was updated or timeout.
*/
func (b flockerBuilder) SetUpAt(dir string, fsGroup *int64) error {
	if volumeutil.IsReady(b.getMetaDir()) {
		return nil
	}

	if b.client == nil {
		c, err := b.newFlockerClient()
		if err != nil {
			return err
		}
		b.client = c
	}

	datasetID, err := b.client.GetDatasetID(dir)
	if err != nil {
		return err
	}

	s, err := b.client.GetDatasetState(datasetID)
	if err != nil {
		return fmt.Errorf("The volume '%s' is not available in Flocker. You need to create this manually with Flocker CLI before using it.", dir)
	}

	primaryUUID, err := b.client.GetPrimaryUUID()
	if err != nil {
		return err
	}

	if s.Primary != primaryUUID {
		if err := b.updateDatasetPrimary(datasetID, primaryUUID); err != nil {
			return err
		}
		newState, err := b.client.GetDatasetState(datasetID)
		if err != nil {
			return fmt.Errorf("The volume '%s' migrated unsuccessfully.", datasetID)
		}
		b.flocker.path = newState.Path
	} else {
		b.flocker.path = s.Path
	}

	volumeutil.SetReady(b.getMetaDir())
	return nil
}

// SetUpAt creates new directory and clones a git repo.
func (b *gitRepoVolumeBuilder) SetUpAt(dir string) error {
	if volumeutil.IsReady(b.getMetaDir()) {
		return nil
	}

	// Wrap EmptyDir, let it do the setup.
	wrapped, err := b.plugin.host.NewWrapperBuilder(wrappedVolumeSpec, &b.pod, b.opts, b.mounter)
	if err != nil {
		return err
	}
	if err := wrapped.SetUpAt(dir); err != nil {
		return err
	}

	if output, err := b.execCommand("git", []string{"clone", b.source}, dir); err != nil {
		return fmt.Errorf("failed to exec 'git clone %s': %s: %v", b.source, output, err)
	}

	files, err := ioutil.ReadDir(dir)
	if err != nil {
		return err
	}
	if len(files) != 1 {
		return fmt.Errorf("unexpected directory contents: %v", files)
	}
	if len(b.revision) == 0 {
		// Done!
		volumeutil.SetReady(b.getMetaDir())
		return nil
	}

	subdir := path.Join(dir, files[0].Name())
	if output, err := b.execCommand("git", []string{"checkout", b.revision}, subdir); err != nil {
		return fmt.Errorf("failed to exec 'git checkout %s': %s: %v", b.revision, output, err)
	}
	if output, err := b.execCommand("git", []string{"reset", "--hard"}, subdir); err != nil {
		return fmt.Errorf("failed to exec 'git reset --hard': %s: %v", output, err)
	}

	volumeutil.SetReady(b.getMetaDir())
	return nil
}

// SetUpAt creates new directory.
func (ed *emptyDir) SetUpAt(dir string, fsGroup *int64) error {
	notMnt, err := ed.mounter.IsLikelyNotMountPoint(dir)
	// Getting an os.IsNotExist err from is a contingency; the directory
	// may not exist yet, in which case, setup should run.
	if err != nil && !os.IsNotExist(err) {
		return err
	}

	// If the plugin readiness file is present for this volume, and the
	// storage medium is the default, then the volume is ready.  If the
	// medium is memory, and a mountpoint is present, then the volume is
	// ready.
	if volumeutil.IsReady(ed.getMetaDir()) {
		if ed.medium == api.StorageMediumMemory && !notMnt {
			return nil
		} else if ed.medium == api.StorageMediumDefault {
			return nil
		}
	}

	switch ed.medium {
	case api.StorageMediumDefault:
		err = ed.setupDir(dir)
	case api.StorageMediumMemory:
		err = ed.setupTmpfs(dir)
	default:
		err = fmt.Errorf("unknown storage medium %q", ed.medium)
	}

	volume.SetVolumeOwnership(ed, fsGroup)

	if err == nil {
		volumeutil.SetReady(ed.getMetaDir())
	}

	return err
}