rabbitmq_mqtt multiple node deployment #5688
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Hi expert, Would you help to confirm if we could deploy the rabbitmq cluster with rabbitmq_mqtt plugin on multiple node? From the doc, it is not supported.
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Replies: 1 comment 14 replies
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It specifically does not support clusters of two nodes (it can be formed but there is no such thing as a majority in a two node clusters). See this section in the Clustering guide. In other words, use three or five nodes clusters, with MQTT or any other feature that is based on Raft, e.g. quorum queues or streams. |
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if the number of the node must be a odd number, how could we control it if the scale is automatic, such as scale in/out with the k8s HPA which depend on the cpu and memory |
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This thread is going in too many directions but a short answer is: automatically scaling RabbitMQ is almost certainly a bad idea. And if you really think you need this, you will need to put a lot of effort into this. |
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@mkuratczyk Would you like to confirm one question? It is allowed to deploy the Rabbit free version for commercial usage? |
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It specifically does not support clusters of two nodes (it can be formed but there is no such thing as a majority in a two node clusters).
See this section in the Clustering guide.
In other words, use three or five nodes clusters, with MQTT or any other feature that is based on Raft, e.g. quorum queues or streams.