Node-RED with RabbitMQ Integration

This repository contains a Docker Compose setup that integrates RabbitMQ with AMQP into Node-RED. The integration with a message bus like RabbitMQ provides the ability to interact with the ProcessCube platform (processcube.io) in a decoupled manner. While we use RabbitMQ as an example here, the setup can be adapted to work with any message bus that supports the AMQP protocol.

Prerequisites

• Docker
• Docker Compose
• Node.js
• npm

Setup

To set up and run the services, follow these steps:

1. Install the necessary dependencies with npm:

npm install

1. Build the Docker images:

docker compose build

Start the services:

docker compose up

After the services (RabbitMQ and Node-RED) are running, you can access RabbitMQ via the management portal on localhost port 5672. Use guest for both the username and password to log in.

Node-RED

Node-RED is a programming tool for wiring together hardware devices, APIs and online services in new and interesting ways. In this setup, Node-RED is configured to use a custom node for RabbitMQ integration via AMQP.

You need to use the amqp-config node with a correct AMQP URL that can access a running RabbitMQ instance. See the rabbitmq service in the Docker Compose file for more details.

You can add an amqp-in node and subscribe to a sample exchange to receive messages and process them with a flow in Node-RED. Alternatively, you can publish an exchange with a routing key to send messages to other decoupled systems after processing in a Node-RED flow.

RabbitMQ

RabbitMQ is an open-source message-broker software that originally implemented the Advanced Message Queuing Protocol (AMQP) and has since been extended with a plug-in architecture to support Streaming Text Oriented Messaging Protocol (STOMP), Message Queuing Telemetry Transport (MQTT), and other protocols.

In this setup, RabbitMQ is available for management at port 15672 and for AMQP connections at port 5672.