[Pacemaker] [Fuel][HA] Notifying clones of offline nodes

Andrew Beekhof andrew at beekhof.net
Tue May 27 16:49:35 EDT 2014

On 28 May 2014, at 1:20 am, Lars Marowsky-Bree <lmb at suse.com> wrote:

> On 2014-05-27T10:02:44, Andrew Beekhof <andrew at beekhof.net> wrote:
>>> 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?
>> Currently no, but it sounds like a useful feature to add.
> Didn't we generate notifications for nodes that were fenced, just as if
> the instances on them were stopped?

Not that I recall.  But thats exactly what we'd want to do I think.
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