Golang Filesystem.Params Examples

Example #1

File: filesystems.go Project: bac/juju

// FilesystemParams returns the parameters for creating or destroying the
// given filesystem.
func FilesystemParams(
	f state.Filesystem,
	storageInstance state.StorageInstance,
	modelUUID, controllerUUID string,
	environConfig *config.Config,
	poolManager poolmanager.PoolManager,
	registry storage.ProviderRegistry,
) (params.FilesystemParams, error) {

	var pool string
	var size uint64
	if stateFilesystemParams, ok := f.Params(); ok {
		pool = stateFilesystemParams.Pool
		size = stateFilesystemParams.Size
	} else {
		filesystemInfo, err := f.Info()
		if err != nil {
			return params.FilesystemParams{}, errors.Trace(err)
		}
		pool = filesystemInfo.Pool
		size = filesystemInfo.Size
	}

	filesystemTags, err := storageTags(storageInstance, modelUUID, controllerUUID, environConfig)
	if err != nil {
		return params.FilesystemParams{}, errors.Annotate(err, "computing storage tags")
	}

	providerType, cfg, err := StoragePoolConfig(pool, poolManager, registry)
	if err != nil {
		return params.FilesystemParams{}, errors.Trace(err)
	}
	result := params.FilesystemParams{
		f.Tag().String(),
		"", // volume tag
		size,
		string(providerType),
		cfg.Attrs(),
		filesystemTags,
		nil, // attachment params set by the caller
	}

	volumeTag, err := f.Volume()
	if err == nil {
		result.VolumeTag = volumeTag.String()
	} else if err != state.ErrNoBackingVolume {
		return params.FilesystemParams{}, errors.Trace(err)
	}

	return result, nil
}