Golang StorageInstance.Kind方法代码示例

// TODO(axw) move this and createParamsStorageInstance to
// apiserver/common/storage.go, alongside StorageAttachmentInfo.
func (api *API) isPersistent(si state.StorageInstance) (bool, error) {
	if si.Kind() != state.StorageKindBlock {
		// TODO(axw) when we support persistent filesystems,
		// e.g. CephFS, we'll need to do the same thing as
		// we do for volumes for filesystems.
		return false, nil
	}
	volume, err := api.storage.StorageInstanceVolume(si.StorageTag())
	if err != nil {
		return false, err
	}
	// If the volume is not provisioned, we read its config attributes.
	if params, ok := volume.Params(); ok {
		_, cfg, err := common.StoragePoolConfig(params.Pool, api.poolManager)
		if err != nil {
			return false, err
		}
		return cfg.IsPersistent(), nil
	}
	// If the volume is provisioned, we look at its provisioning info.
	info, err := volume.Info()
	if err != nil {
		return false, err
	}
	return info.Persistent, nil
}

func createStorageDetails(st storageAccess, si state.StorageInstance) (*params.StorageDetails, error) {
	// Get information from underlying volume or filesystem.
	var persistent bool
	var statusEntity status.StatusGetter
	if si.Kind() != state.StorageKindBlock {
		// TODO(axw) when we support persistent filesystems,
		// e.g. CephFS, we'll need to do set "persistent"
		// here too.
		filesystem, err := st.StorageInstanceFilesystem(si.StorageTag())
		if err != nil {
			return nil, errors.Trace(err)
		}
		statusEntity = filesystem
	} else {
		volume, err := st.StorageInstanceVolume(si.StorageTag())
		if err != nil {
			return nil, errors.Trace(err)
		}
		if info, err := volume.Info(); err == nil {
			persistent = info.Persistent
		}
		statusEntity = volume
	}
	status, err := statusEntity.Status()
	if err != nil {
		return nil, errors.Trace(err)
	}

	// Get unit storage attachments.
	var storageAttachmentDetails map[string]params.StorageAttachmentDetails
	storageAttachments, err := st.StorageAttachments(si.StorageTag())
	if err != nil {
		return nil, errors.Trace(err)
	}
	if len(storageAttachments) > 0 {
		storageAttachmentDetails = make(map[string]params.StorageAttachmentDetails)
		for _, a := range storageAttachments {
			machineTag, location, err := storageAttachmentInfo(st, a)
			if err != nil {
				return nil, errors.Trace(err)
			}
			details := params.StorageAttachmentDetails{
				a.StorageInstance().String(),
				a.Unit().String(),
				machineTag.String(),
				location,
			}
			storageAttachmentDetails[a.Unit().String()] = details
		}
	}

	return &params.StorageDetails{
		StorageTag:  si.Tag().String(),
		OwnerTag:    si.Owner().String(),
		Kind:        params.StorageKind(si.Kind()),
		Status:      common.EntityStatusFromState(status),
		Persistent:  persistent,
		Attachments: storageAttachmentDetails,
	}, nil
}

func createParamsStorageInstance(si state.StorageInstance, persistent bool) params.StorageDetails {
	result := params.StorageDetails{
		OwnerTag:   si.Owner().String(),
		StorageTag: si.Tag().String(),
		Kind:       params.StorageKind(si.Kind()),
		Status:     "pending",
		Persistent: persistent,
	}
	return result
}