// 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 := storagecommon.MaybeAssignedStorageInstance( volume.StorageInstance, p.st.StorageInstance, ) if err != nil { return nil, errors.Annotatef(err, "getting volume %q storage instance", volumeTag.Id()) } volumeParams, err := storagecommon.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 = ¶ms.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 }