Example #1
0
// machineVolumeParams retrieves VolumeParams for the volumes that should be
// provisioned with, and attached to, the machine. The client should ignore
// parameters that it does not know how to handle.
func (p *ProvisionerAPI) machineVolumeParams(m *state.Machine) ([]params.VolumeParams, error) {
	volumeAttachments, err := m.VolumeAttachments()
	if err != nil {
		return nil, err
	}
	if len(volumeAttachments) == 0 {
		return nil, nil
	}
	envConfig, err := p.st.EnvironConfig()
	if err != nil {
		return nil, err
	}
	poolManager := poolmanager.New(state.NewStateSettings(p.st))
	allVolumeParams := make([]params.VolumeParams, 0, len(volumeAttachments))
	for _, volumeAttachment := range volumeAttachments {
		volumeTag := volumeAttachment.Volume()
		volume, err := p.st.Volume(volumeTag)
		if err != nil {
			return nil, errors.Annotatef(err, "getting volume %q", volumeTag.Id())
		}
		storageInstance, err := common.MaybeAssignedStorageInstance(
			volume.StorageInstance, p.st.StorageInstance,
		)
		if err != nil {
			return nil, errors.Annotatef(err, "getting volume %q storage instance", volumeTag.Id())
		}
		volumeParams, err := common.VolumeParams(volume, storageInstance, envConfig, poolManager)
		if err != nil {
			return nil, errors.Annotatef(err, "getting volume %q parameters", volumeTag.Id())
		}
		provider, err := registry.StorageProvider(storage.ProviderType(volumeParams.Provider))
		if err != nil {
			return nil, errors.Annotate(err, "getting storage provider")
		}
		if provider.Dynamic() {
			// Leave dynamic storage to the storage provisioner.
			continue
		}
		volumeAttachmentParams, ok := volumeAttachment.Params()
		if !ok {
			// Attachment is already provisioned; this is an insane
			// state, so we should not proceed with the volume.
			return nil, errors.Errorf(
				"volume %s already attached to machine %s",
				volumeTag.Id(), m.Id(),
			)
		}
		// Not provisioned yet, so ask the cloud provisioner do it.
		volumeParams.Attachment = &params.VolumeAttachmentParams{
			volumeTag.String(),
			m.Tag().String(),
			"", // we're creating the volume, so it has no volume ID.
			"", // we're creating the machine, so it has no instance ID.
			volumeParams.Provider,
			volumeAttachmentParams.ReadOnly,
		}
		allVolumeParams = append(allVolumeParams, volumeParams)
	}
	return allVolumeParams, nil
}
Example #2
0
// FilesystemParams returns the parameters for creating the filesystems
// with the specified tags.
func (s *StorageProvisionerAPI) FilesystemParams(args params.Entities) (params.FilesystemParamsResults, error) {
	canAccess, err := s.getStorageEntityAuthFunc()
	if err != nil {
		return params.FilesystemParamsResults{}, err
	}
	envConfig, err := s.st.EnvironConfig()
	if err != nil {
		return params.FilesystemParamsResults{}, err
	}
	results := params.FilesystemParamsResults{
		Results: make([]params.FilesystemParamsResult, len(args.Entities)),
	}
	poolManager := poolmanager.New(s.settings)
	one := func(arg params.Entity) (params.FilesystemParams, error) {
		tag, err := names.ParseFilesystemTag(arg.Tag)
		if err != nil || !canAccess(tag) {
			return params.FilesystemParams{}, common.ErrPerm
		}
		filesystem, err := s.st.Filesystem(tag)
		if errors.IsNotFound(err) {
			return params.FilesystemParams{}, common.ErrPerm
		} else if err != nil {
			return params.FilesystemParams{}, err
		}
		storageInstance, err := common.MaybeAssignedStorageInstance(
			filesystem.Storage,
			s.st.StorageInstance,
		)
		if err != nil {
			return params.FilesystemParams{}, err
		}
		filesystemParams, err := common.FilesystemParams(
			filesystem, storageInstance, envConfig, poolManager,
		)
		if err != nil {
			return params.FilesystemParams{}, err
		}
		return filesystemParams, nil
	}
	for i, arg := range args.Entities {
		var result params.FilesystemParamsResult
		filesystemParams, err := one(arg)
		if err != nil {
			result.Error = common.ServerError(err)
		} else {
			result.Result = filesystemParams
		}
		results.Results[i] = result
	}
	return results, nil
}
Example #3
0
// VolumeParams returns the parameters for creating or destroying
// the volumes with the specified tags.
func (s *StorageProvisionerAPI) VolumeParams(args params.Entities) (params.VolumeParamsResults, error) {
	canAccess, err := s.getStorageEntityAuthFunc()
	if err != nil {
		return params.VolumeParamsResults{}, err
	}
	envConfig, err := s.st.EnvironConfig()
	if err != nil {
		return params.VolumeParamsResults{}, err
	}
	results := params.VolumeParamsResults{
		Results: make([]params.VolumeParamsResult, len(args.Entities)),
	}
	poolManager := poolmanager.New(s.settings)
	one := func(arg params.Entity) (params.VolumeParams, error) {
		tag, err := names.ParseVolumeTag(arg.Tag)
		if err != nil || !canAccess(tag) {
			return params.VolumeParams{}, common.ErrPerm
		}
		volume, err := s.st.Volume(tag)
		if errors.IsNotFound(err) {
			return params.VolumeParams{}, common.ErrPerm
		} else if err != nil {
			return params.VolumeParams{}, err
		}
		volumeAttachments, err := s.st.VolumeAttachments(tag)
		if err != nil {
			return params.VolumeParams{}, err
		}
		storageInstance, err := common.MaybeAssignedStorageInstance(
			volume.StorageInstance,
			s.st.StorageInstance,
		)
		if err != nil {
			return params.VolumeParams{}, err
		}
		volumeParams, err := common.VolumeParams(volume, storageInstance, envConfig, poolManager)
		if err != nil {
			return params.VolumeParams{}, err
		}
		if len(volumeAttachments) == 1 {
			// There is exactly one attachment to be made, so make
			// it immediately. Otherwise we will defer attachments
			// until later.
			volumeAttachment := volumeAttachments[0]
			volumeAttachmentParams, ok := volumeAttachment.Params()
			if !ok {
				return params.VolumeParams{}, errors.Errorf(
					"volume %q is already attached to machine %q",
					volumeAttachment.Volume().Id(),
					volumeAttachment.Machine().Id(),
				)
			}
			machineTag := volumeAttachment.Machine()
			instanceId, err := s.st.MachineInstanceId(machineTag)
			if errors.IsNotProvisioned(err) {
				// Leave the attachment until later.
				instanceId = ""
			} else if err != nil {
				return params.VolumeParams{}, err
			}
			volumeParams.Attachment = &params.VolumeAttachmentParams{
				tag.String(),
				machineTag.String(),
				"", // volume ID
				string(instanceId),
				volumeParams.Provider,
				volumeAttachmentParams.ReadOnly,
			}
		}
		return volumeParams, nil
	}
	for i, arg := range args.Entities {
		var result params.VolumeParamsResult
		volumeParams, err := one(arg)
		if err != nil {
			result.Error = common.ServerError(err)
		} else {
			result.Result = volumeParams
		}
		results.Results[i] = result
	}
	return results, nil
}