// 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 volumeStorageAttachmentInfo(
st StorageInterface,
storageInstance state.StorageInstance,
machineTag names.MachineTag,
) (*storage.StorageAttachmentInfo, error) {
storageTag := storageInstance.StorageTag()
volume, err := st.StorageInstanceVolume(storageTag)
if err != nil {
return nil, errors.Annotate(err, "getting volume")
}
volumeInfo, err := volume.Info()
if err != nil {
return nil, errors.Annotate(err, "getting volume info")
}
volumeAttachment, err := st.VolumeAttachment(machineTag, volume.VolumeTag())
if err != nil {
return nil, errors.Annotate(err, "getting volume attachment")
}
volumeAttachmentInfo, err := volumeAttachment.Info()
if err != nil {
return nil, errors.Annotate(err, "getting volume attachment info")
}
devicePath, err := volumeAttachmentDevicePath(
volumeInfo,
volumeAttachmentInfo,
)
if err != nil {
return nil, errors.Trace(err)
}
return &storage.StorageAttachmentInfo{
storage.StorageKindBlock,
devicePath,
}, nil
}
// storageTags returns the tags that should be set on a volume or filesystem,
// if the provider supports them.
func storageTags(
storageInstance state.StorageInstance,
cfg *config.Config,
) (map[string]string, error) {
storageTags := tags.ResourceTags(names.NewModelTag(cfg.UUID()), cfg)
if storageInstance != nil {
storageTags[tags.JujuStorageInstance] = storageInstance.Tag().Id()
storageTags[tags.JujuStorageOwner] = storageInstance.Owner().Id()
}
return storageTags, nil
}
func volumeStorageAttachmentInfo(
st StorageInterface,
storageInstance state.StorageInstance,
machineTag names.MachineTag,
) (*storage.StorageAttachmentInfo, error) {
storageTag := storageInstance.StorageTag()
volume, err := st.StorageInstanceVolume(storageTag)
if err != nil {
return nil, errors.Annotate(err, "getting volume")
}
volumeInfo, err := volume.Info()
if err != nil {
return nil, errors.Annotate(err, "getting volume info")
}
volumeAttachment, err := st.VolumeAttachment(machineTag, volume.VolumeTag())
if err != nil {
return nil, errors.Annotate(err, "getting volume attachment")
}
volumeAttachmentInfo, err := volumeAttachment.Info()
if err != nil {
return nil, errors.Annotate(err, "getting volume attachment info")
}
blockDevices, err := st.BlockDevices(machineTag)
if err != nil {
return nil, errors.Annotate(err, "getting block devices")
}
blockDevice, ok := MatchingBlockDevice(
blockDevices,
volumeInfo,
volumeAttachmentInfo,
)
if !ok {
// We must not say that a block-kind storage attachment is
// provisioned until its block device has shown up on the
// machine, otherwise the charm may attempt to use it and
// fail.
return nil, errors.NotProvisionedf("%v", names.ReadableString(storageTag))
}
devicePath, err := volumeAttachmentDevicePath(
volumeInfo,
volumeAttachmentInfo,
*blockDevice,
)
if err != nil {
return nil, errors.Trace(err)
}
return &storage.StorageAttachmentInfo{
storage.StorageKindBlock,
devicePath,
}, nil
}
// storageTags returns the tags that should be set on a volume or filesystem,
// if the provider supports them.
func storageTags(
storageInstance state.StorageInstance,
modelUUID, controllerUUID string,
tagger tags.ResourceTagger,
) (map[string]string, error) {
storageTags := tags.ResourceTags(
names.NewModelTag(modelUUID),
names.NewControllerTag(controllerUUID),
tagger,
)
if storageInstance != nil {
storageTags[tags.JujuStorageInstance] = storageInstance.Tag().Id()
storageTags[tags.JujuStorageOwner] = storageInstance.Owner().Id()
}
return storageTags, nil
}
func filesystemStorageAttachmentInfo(
st StorageInterface,
storageInstance state.StorageInstance,
machineTag names.MachineTag,
) (*storage.StorageAttachmentInfo, error) {
storageTag := storageInstance.StorageTag()
filesystem, err := st.StorageInstanceFilesystem(storageTag)
if err != nil {
return nil, errors.Annotate(err, "getting filesystem")
}
filesystemAttachment, err := st.FilesystemAttachment(machineTag, filesystem.FilesystemTag())
if err != nil {
return nil, errors.Annotate(err, "getting filesystem attachment")
}
filesystemAttachmentInfo, err := filesystemAttachment.Info()
if err != nil {
return nil, errors.Annotate(err, "getting filesystem attachment info")
}
return &storage.StorageAttachmentInfo{
storage.StorageKindFilesystem,
filesystemAttachmentInfo.MountPoint,
}, 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
}
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 ¶ms.StorageDetails{
StorageTag: si.Tag().String(),
OwnerTag: si.Owner().String(),
Kind: params.StorageKind(si.Kind()),
Status: common.EntityStatusFromState(status),
Persistent: persistent,
Attachments: storageAttachmentDetails,
}, nil
}