VerneMQ 保留的消息
创建时间：2024-08-17 12:22:02
vmq-admin retain show
$ vmq-admin retain show --payload --topic=some/topic
+---------+
| payload |
+---------+
|a-message|
+---------+
$ vmq-admin retain show --payload a-message --topic
+-------------+
| topic |
+-------------+
| some/topic |
|another/topic|
+-------------+