Open Stack

On 05/26/2014 11:16 AM, Vladimir Kuklin wrote:
> Hi all
>
> We are working on HA solutions for OpenStack(-related) services and
> figured out that sometimes we need clones to be notified if one of the
> cluster nodes running clone instances goes offline. E.g., we need this
> information to make RabbitMQ AMQP broker cluster to forget this node
> until it goes up again. This is easily achievable if we stop the
> instance on the node - then notification is sent to clone instances and
> everything is fine. But what can we do if node goes offline
> unexpectedly? Is there any way to notify other clones that the slave is
> dead and perform corresponding actions?
>
> One of the ways we figured out is to implement additional cluster
> monitoring action in resource OCF and purge "dead" nodes, but it looks a
> little bit overwhelming and inconvenient. Is there a chance we missed
> some attributes that allow configuration of such behaviour that
> pacemaker notifies other clones on node offline/fence/cold_shutdown ?

Ping. Hi Vladimir, did you ever get any response about this? I'm also 
interested in the answers...

Best,
-jay