[rabbitmq-discuss] Bringing down Nodes in a cluster

[Michael Klishin]

On 28 Feb 2014, at 12:27, Patrick Long <pat at munkiisoft.com> wrote:

> So I can stop the node by using stop_app or I can stop the RabbitMQ service on that node. Is one better that the other?

Stop the service. stop_app does not stop the VM, which may be necessary with some upgrades
(e.g. you also want to upgrade the Erlang VM).

Use stop_app when resetting nodes, as described in “Breaking up a cluster” [1].

> When Ops want to update a machine that is a Node in a 3 node RabbitMQ cluster what is the recommended approach?
> 
> Is it to stop the service on one node, run Windows Update etc etc then bring that node back. Once that node is confirmed move to next node always ensuring there is at least one synchronised slave? 

See “Breaking up a cluster” in [1].

Removing nodes from the cluster and bringing them back one by one is a good
strategy.

HTH.

1. http://www.rabbitmq.com/clustering.html

MK

Software Engineer, Pivotal/RabbitMQ