Creating a RabbitMQ Cluster on a Single Machine
Creating a RabbitMQ Cluster on a Single Machine
Learn more about installing a cluster on a single machine and how to add more nodes to your cluster.
Join the DZone community and get the full member experience.
Join For FreeWSO2 is the only open source vendor to be named a leader in The Forrester Wave™: API Management Solutions, Q4 2018 Report. Download the report now or try out our product for free.
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 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_NODE_PORT=5674
RABBITMQ_NODENAME=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:
BOOT FAILED
===========
Error description:
{could_not_start,rabbitmq_mqtt,
{{shutdown,
{failed_to_start_child,'rabbit_mqtt_listener_sup_:::1883',
{shutdown,
{failed_to_start_child,tcp_listener,
{cannot_listen,{0,0,0,0,0,0,0,0},1883,eaddrinuse}}}}},
{rabbit_mqtt,start,[normal,[]]}}}This means that the Rabbit MQTT for the currently running node is using port 1883.
BOOT FAILED
===========
Error description:
{could_not_start,rabbitmq_stomp,
{{shutdown,
{failed_to_start_child,'rabbit_stomp_listener_sup_:::61613',
{shutdown,
{failed_to_start_child,tcp_listener,
{cannot_listen,{0,0,0,0,0,0,0,0},61613,eaddrinuse}}}}},
{rabbit_stomp,start,[normal,[]]}}}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_NODE_PORT=5674
RABBITMQ_NODENAME=hare@localhost
RABBITMQ_SERVER_START_ARGS="
-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_appRead the WSO2 Methodology for Agility to see how you can transform your integration projects from semi-agile to a scalable continuous agile approach.
Like This Article? Read More From DZone
Published at DZone with permission of Alex Theedom , DZone MVB. See the original article here.
Opinions expressed by DZone contributors are their own.
{{ parent.title || parent.header.title}}
{{ parent.tldr }}
{{ parent.linkDescription }}
{{ parent.urlSource.name }}