skip filtering using sid with replicationClass

skip filtering using sid with replicationClass if peerclass
is not found

Signed-off-by: rakeshgm <rakeshgm@redhat.com>

internal/controller/volumereplicationgroup_controller.go

@@ -854,7 +854,7 @@ func (v *VRGInstance) separatePVCsUsingStorageClassProvisioner(pvcList *corev1.P
 
 		switch len(v.instance.Spec.Async.PeerClasses) {
 		case 0:
-			v.log.Info("validate using sc provisioner")
+			v.log.Info("validate using only sc provisioner")
 
 			replicationClassMatchFound := false
 

internal/controller/vrg_volrep.go

@@ -1269,6 +1269,8 @@ func (v *VRGInstance) selectVolumeReplicationClass(
 		return nil, fmt.Errorf("missing storageID label in storageclass of pvc %s", namespacedName)
 	}
 
+	peerClasses := len(v.instance.Spec.Async.PeerClasses)
+
 	matchingReplicationClassList := []*volrep.VolumeReplicationClass{}
 
 	for index := range v.replClassList.Items {
@@ -1285,13 +1287,22 @@ func (v *VRGInstance) selectVolumeReplicationClass(
 			continue
 		}
 
-		sIDFromReplicationClass, exists := replicationClass.GetLabels()[StorageIDLabel]
-		if !exists {
-			continue
-		}
+		// if peerClasses does not exist, replicationClasses would not have sid in
+		// older ramen versions, this check is neeed because we need to handle upgrade
+		// scenario where sid is not present in replicatioClass.    
 
-		if sIDFromReplicationClass != sID {
-			continue
+		// if peerClass exist, continue to check if sid matches, or skip the check and proceed 
+		// to append to matchingReplicationClassList
+		if peerClasses != 0 {
+
+			sIDFromReplicationClass, exists := replicationClass.GetLabels()[StorageIDLabel]
+			if !exists {
+				continue
+			}
+
+			if sIDFromReplicationClass != sID {
+				continue
+			}
 		}
 
 		matchingReplicationClassList = append(matchingReplicationClassList, replicationClass)