node_key	ip	hostname	node_name
emqx01	10.2.203.108	sqjcmqtt01	emqx@10.2.203.108
emqx02	10.2.203.109	sqjcmqtt02	emqx@10.2.203.109
emqx03	10.2.203.110	sqjcmqtt03	emqx@10.2.203.110