ComputeService computeService = iaas.getComputeService();
IaasContext ctxt = null;
if ((ctxt = subjectedSerCtxt.getIaasContext(iaas.getType())) == null) {
ctxt = subjectedSerCtxt.addIaasContext(iaas.getType());
}
// get list of node Ids which are belong to this domain- sub
// domain
List<String> nodeIds = ctxt.getNodeIds();