[rabbitmq-discuss] Upgrading erlang, rabbitmq in a cluster.

Mon Nov 12 13:46:41 GMT 2012

On 11/12/2012 01:38 PM, Emile Joubert wrote:
> Hi,
>
> On 12/11/12 11:32, Jean Paul Galea wrote:
>> The question is, how do we keep these two nodes up to date with the
>> latest versions, without suffering downtime?
>
> Details on how to upgrade a cluster are relevant in your case:
> http://www.rabbitmq.com/clustering.html#upgrading
>
> It is not possible to upgrade a cluster without downtime, since all
> nodes need to run the same version of RabbitMQ. All the nodes in the
> cluster have to be shut down during upgrade, implying downtime.
>
> The interruptions can be as short as a server reboot. The impact of the
> broker downtime can also be minimised by having publishers and consumers
> automatically retry failed connections to the broker. Persistent
> messages that exist in queues are preserved when the broker is upgraded,
> so messages won't be lost due to upgrades.
>
>
>
> -Emile

OK, thanks for clarifying!