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RabbitMQ cluster on a single machine

If you are having problems setting up a cluster on a single machine then the following post might help answer some questions.

I assume that you have already set up RabbitMQ on your local machine (rabbit@localhost) and want to know how to add two more nodes and cluster them.

These instructions relate to the installation on a MacBook Pro running OS X Yosemite.

As you already have an installation of RabbitMQ all you need to do is instantiate instances on new nodes. The following command will instantiate an instance of Rabbit on a node called hare@localhost.

        rabbitmq-server &

Ensure the port number is different to the port currently in use.

A sticking point are the ports bound by Rabbit to plug-ins. You might see the following error:


Error description:

This means that the Rabbit MQTT for the currently running node is using port 1883.


Error description:

This means that the Rabbit STOMP for the currently running node is using port 61613.

To resolve this conflict add an argument to RABBITMQ_SERVER_START_ARGS specifying a new port for the plug-in.

A list of installed plug-in is shown in the RabbitMQ web interface in the overview tab under ports and contexts.

The following shows how to configure ports for the Rabbit management and Rabbit MQTT

        -rabbitmq_management listener [{port,15674}] 
        -rabbitmq_mqtt tcp_listeners [1884]" 
    rabbitmq-server &


Now add the node to the cluster. Stop the instance, join it to another node and start.

rabbitmqctl -n hare@localhost stop_app

rabbitmqctl -n hare@localhost join_cluster rabbit@localhost

rabbitmqctl -n hare@localhost start_app







About Alex (67 Articles)
Enterprise Developer. Passionate about the Java EE eco-system, Java 8 and microservices. Author, trainer, conference speaker and blogger. Oracle certified.

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