Add Single or Non RAC Database in SRVCTL or Cluster

srvctl add database -d singledbc -o /opt/oracle/ora12201 -dbtype single -node node1server.com
srvctl add service -d singledbc -pdb singledb -s singledbsvc
srvctl start service -d singledbc -s singledbsvc

srvctl stop database -d singledb -o immediate;
srvctl start database -d singledb

alter system set remote_listener=’scanlistener:1521′;