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
}
// populateStatusFromGetter creates status information for machines, units.
func populateStatusFromGetter(agent *params.DetailedStatus, getter status.StatusGetter) {
statusInfo, err := getter.Status()
populateStatusFromStatusInfoAndErr(agent, statusInfo, err)
}