In the previous post, I described what a cluster is and how to setup a RabbitMQ cluster on Raspberry Pi with a few Zero W’s. I’ve built a 5 node cluster, with one master and 4 followers. But this is not enough, I’d like my cluster to be accessible from a single location, it doesn’t really matter which node my applications connect to, since I would work only with HA or Quorum queues. For the latter, a new blog post is coming up where I’ll go through exhaustive details on these queues, their pros, cons and usage examples.Continue reading
In this blog post I will show you how to build and configure a 5-node Raspberry Pi cluster and use RabbitMQ’s clustering capabilities on the above to scale the message broker horizontally.
Having a system which is composed by distributed applications is a great idea, but a way to communicate with each other is required. A very popular architecture is the so called MDA or Message Driven Architecture, where a system is composed from autonomous components that communicate with each other via messages. The part which facilitates communication is the message broker, effectively decoupling applications, which don’t communicate directly, rather they publish messages to the message broker and the latter is responsible to forward them to interested parties, i.e. other applications.
A message broker that is particularly powerful and interesting is RabbitMQ, one of the most popular open source tools for that job, used worldwide by large enterprises to small startups.
In this post, I’m going to explore RabbitMQ’s basics, by creating a simple RabbitMQ producer and consumer in .NET Core with C#. Then, I will take discussion to how AMQP works at a low-level, using the code example demonstrated.