RabbitMQ集群安装rabbitmq_delayed_message

RabbitMQ集群安装rabbitmq_delayed_message_exchange

1、单节点安装rabbitmq安装延迟队列

安装延迟队列rabbitmq_delayed_message_exchange可以参考这个文章： rabbitmq安装延迟队列-CSDN博客

2、集群安装rabbitmq_delayed_message_exchange

在第二个节点 join_cluster 之后，start_app 就会报错了

(CaseClauseError) no case clause matching: {:error, {:timeout_waiting_for_tables, [:rabbit@mq2, :rabbit@mq1], [:rabbit_delayed_messagerabbit@mq1, :rabbit_delayed_messagerabbit@mq1_index]}} 
(rabbitmqctl 3.8.0-dev) lib/rabbitmq/cli/plugins/plugins_helpers.ex:107: 
RabbitMQ.CLI.Plugins.Helpers.update_enabled_plugins/4 
(rabbitmqctl 3.8.0-dev) lib/rabbitmq/cli/plugins/commands/enable_command.ex:121: anonymous fn/6 in RabbitMQ.CLI.Plugins.Commands.EnableCommand.do_run/2(elixir 1.10.4) lib/stream.ex:1325: anonymous fn/2 in Stream.iterate/2 
(elixir 1.10.4) lib/stream.ex:1538: Stream.do_unfold/4 
(elixir 1.10.4) lib/stream.ex:1609: Enumerable.Stream.do_each/4 
(elixir 1.10.4) lib/stream.ex:956: Stream.do_enum_transform/7 
(elixir 1.10.4) lib/stream.ex:1609: Enumerable.Stream.do_each/4 
(elixir 1.10.4) lib/enum.ex:2161: Enum.reduce_while/3 {:case_clause, {:error, {:timeout_waiting_for_tables, [:rabbit@mq2, :rabbit@mq1], [:rabbit_delayed_messagerabbit@mq1, :rabbit_delayed_messagerabbit@mq1_index]}}}

找了很多资料最后发现原因是：rabbitmq_delayed_message_exchange插件需要用disc类型,集群的所有节点都需要改成disc类型

#将node2加入node1时，指定node2为内存节点（node2默认加入之后默认是ram节点）
rabbitmqctl join_cluster rabbit@node1 --ram
#若集群已搭建好，可以切换节点类型
rabbitmqctl change_cluster_node_type disc

第二个节点修改成 disc 节点之后，就可以start_app了。