Is it possible to run more than one rabbitmq instance on one machine?-Collection of common programming errors

One approach that I took when testing out clustering on my dev machine was to fire up several VMs. I had several for Rabbit and one for HAProxy.

While you can, as per one of the other answers, run multiple instances on a single OS instance, the multiple VM approach allowed me to mimic the intended production environment more closely.

NB. I have chosen to interpret your ‘one machine’ as meaning a physical machine for the purpose of this answer. If your meaning was ‘virtual’ then I defer to the other answer posted against this question which details how to accomplish this.