[openstack-dev] [Ceilometer] [Heat] Ceilometer aware people, please advise us on processing notifications..

Angus Salkeld angus.salkeld at RACKSPACE.COM
Tue Jun 24 04:19:25 UTC 2014


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On 24/06/14 09:28, Clint Byrum wrote:
> Hello! I would like to turn your attention to this specification draft
> that I've written:
> 
> https://review.openstack.org/#/c/100012/1/specs/convergence-continuous-observer.rst
> 
> Angus has suggested that perhaps Ceilometer is a better place to handle
> this. Can you please comment on the review, or can we have a brief
> mailing list discussion about how best to filter notifications?
> 
> Basically in Heat when a user boots an instance, we would like to act as
> soon as it is active, and not have to poll the nova API to know when
> that is. Angus has suggested that perhaps we can just tell ceilometer to
> hit Heat with a web hook when that happens.

We could have a per-resource webhook (either the signal or something like it)
that is just a logical notification/kick to go and re-check the resource state.

The other part of this is when we turn on continuous convergence, we could
get an alarm whenever that resource changes state (or what ever we are interested
in - as long as it is in the notification payload).

Given the number of resources we want to manage the alarm sub-system will need to
be scalable. I'd rather Ceilometer solve that than Heat.

Aside:
One thing is do we need to continuously monitor the "properties"? Because the notifications
won't tell us that.

- -Angus

> 
> Thanks!
> 
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
> 

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