feat(scheduler): support filtering storage via medium

pkg/scheduler/algorithm/predicates/disk_schedtag_predicate.go

@@ -120,7 +120,14 @@ func (p *DiskSchedtagPredicate) IsResourceFitInput(u *core.Unit, c core.Candidat
 			}
 		}
 	}
-
+	if len(d.Medium) != 0 {
+		if storage.MediumType != d.Medium {
+			return &FailReason{
+				fmt.Sprintf("Storage %s medium %s != %s", storage.Name, storage.MediumType, d.Medium),
+				StorageMedium,
+			}
+		}
+	}
 	storageTypes := p.GetHypervisorDriver().GetStorageTypes()
 	if len(storageTypes) != 0 && !utils.IsInStringArray(storage.StorageType, storageTypes) {
 		return &FailReason{

pkg/scheduler/algorithm/predicates/error.go

@@ -126,4 +126,5 @@ const (
 	StorageMatch     = "storage_match"
 	StorageType      = "storage_type"
 	StorageOwnership = "storage_ownership"
+	StorageMedium    = "storage_medium"
 )