db_sentinel_master_name=os.getenv('DBAAS_MASTER_NAME'),
db_cluster_addr_list=os.getenv('DBAAS_CLUSTER_ADDR_LIST'),
db_type=backend_type)
db_sentinel_master_name=os.getenv('DBAAS_MASTER_NAME'),
db_cluster_addr_list=os.getenv('DBAAS_CLUSTER_ADDR_LIST'),
db_type=backend_type)