RabbitMQ Federation集群

Federated Exchanges:联盟交换模式图下图

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Federation插件，使得不同集群的节点之间可以传递消息，从而模拟出类似集群的效果。这样可以有几点好处：
松耦合：联合在一起的不同集群可以有各自的用户，权限等信息，无需一致；此外，这些集群的RabbitMQ和Erlang的版本可以不一致。
消息发布到上游队列服务节点upstream exchange 的同时会把消息复制到下游的federated exchange队列节点。
upstream exchange与federated exchange不必在同一个节点或在同一集群。实质上upstream exchange会把交换器或者队列绑定到federated exchange服务器的交换器或者队列上，并把消息复制到federated exchange服务器上。
远程网络连接友好：由于通信是遵循AMQP协议的，故而对断断续续的网络连接容忍度高。

如何开始？

前提需要安装插件[Federation plugin]

windows安装

rabbitmq-plugins enable rabbitmq_federation
rabbitmq-plugins enable rabbitmq_federation_management

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linux安装

进入到队列服务节点：
rabbitmq-plugins enable rabbitmq_federation

root@fcjrabbit1:/# rabbitmq-plugins enable rabbitmq_federation
Enabling plugins on node rabbit@fcjrabbit1:
rabbitmq_federation
The following plugins have been configured:
  rabbitmq_federation
  rabbitmq_management
  rabbitmq_management_agent
  rabbitmq_web_dispatch
Applying plugin configuration to rabbit@fcjrabbit1...
The following plugins have been enabled:
  rabbitmq_federation

rabbitmq-plugins enable rabbitmq_federation_management

Enabling plugins on node rabbit@fcjrabbit1:
rabbitmq_federation_management
The following plugins have been configured:
  rabbitmq_federation
  rabbitmq_federation_management
  rabbitmq_management
  rabbitmq_management_agent
  rabbitmq_web_dispatch
Applying plugin configuration to rabbit@fcjrabbit1...
The following plugins have been enabled:
  rabbitmq_federation_management

started 1 plugins.
root@fcjrabbit1:/#

安装成功后，打开web监控界面，在选项admin看到federation的信息
定义Federation策略