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Conditions

  • Memory: Nodes hosting RabbitMQ should have at least 128MB of memory available at all times
  • Memory: RabbitMQ will not accept any new messages when it detects that it's using more than 40% of the available memory
  • Disk free space limit: The default limit for RabbitMQ to block all publishers is 50MB, this is low and should be changed to a more sensible value (follow the link below)
  • Users: Delete the default user (guest). Default user only can connect from localhost by default, because it has well-known credentials
  • File handles limit: Make sure your environment allows for at least 50K open file descriptors for effective RabbitMQ user, including in development environments.

For more information on the (minimum) requirements, please read the following: https://www.rabbitmq.com/production-checklist.html

Terminology

  • Exchange: An exchange is a very simple thing. On one side it receives messages from producers and the other side it pushes them to queues.
  • Queue: They store messages that are consumed by applications.
  • Message: An item that is put on the queue.Producer: Producing means nothing more than sending. A program that sends messages is a producer.
  • Consumer: Consuming has a similar meaning to receiving. A consumer is a program that mostly waits to receive messages.

How to setup the queue

At this moment the only supported Queue is RabbitMQ. First you need to download the rabbitmq-server-3.6.14 from here, please choose the correct version for your operating system.

Installation

First install RabbitMQ using the installation manual for you operating system. You can find these manuals under Installation Guides.

After RabbitMQ is installed we need to activate the management-plugin to be able to access the management user interface of RabbitMQ.

  1. Go to the /sbin folder of the installation folder of RabbitMQ  and open a command prompt

  2. Enable the management plugin that is included with RabbitMQ server;
    run 'rabbitmq-plugins enable rabbitmq_management' from the command prompt

  3. The RabbitMQ dashboard should now be accessible through http://localhost:15672, default user is 'guest' with password 'guest'

    1. Be aware that by default, the guest user can only login from localhost

    2. add a new user so you can remove the guest user. please see: https://www.rabbitmq.com/access-control.html
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