RabbitMQ 3.7.18安装延时插件rabbitmq-delayed-message-exchange后启动报错

环境：

安装请参考：

https://blog.csdn.net/qq_37487520/article/details/126079651
https://www.cnblogs.com/myifb/articles/16638251.html

启用插件时，不用写插件版本号：rabbitmq-plugins enable rabbitmq_delayed_message_exchange

报错原因：

https://blog.csdn.net/xcy1193068639/article/details/96486344

就是需要在节点类型为disc的节点上运行。

解决

https://linuxhub.cn/2018/08/13/conf-rabbitmq-node.html

[root@middlewareserver3 plugins]# rabbitmqctl cluster_status
Cluster status of node rabbit@middlewareserver3 ...
[{nodes,[{disc,[rabbit@middlewareserver1]},
         {ram,[rabbit@middlewareserver3,rabbit@middlewareserver2]}]},
 {running_nodes,[rabbit@middlewareserver2,rabbit@middlewareserver1,
                 rabbit@middlewareserver3]},
 {cluster_name,<<"rabbit@middlewareserver1">>},
 {partitions,[]},
 {alarms,[{rabbit@middlewareserver2,[]},
          {rabbit@middlewareserver1,[]},
          {rabbit@middlewareserver3,[]}]}]
[root@middlewareserver3 plugins]# rabbitmqctl -n rabbit@middlewareserver3 stop_app
Stopping rabbit application on node rabbit@middlewareserver3 ...
[root@middlewareserver3 plugins]# rabbitmqctl -n rabbit@middlewareserver3 change_cluster_node_type disc
Turning rabbit@middlewareserver3 into a disc node
[root@middlewareserver3 plugins]# rabbitmqctl -n rabbit@middlewareserver3 start_app