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On Thu, Jan 7, 2016 at 1:06 PM, AFEK, Ifat (Ifat) <
ifat.afek at alcatel-lucent.com> wrote:

> > -----Original Message-----
> > From: gord chung [mailto:gord at live.ca]
> > Sent: Wednesday, January 06, 2016 3:52 PM
> >
> > On 06/01/2016 8:11 AM, AFEK, Ifat (Ifat) wrote:
> > > Hi,
> > >
> > > We would like to be notified once an alarm state is changed, so we
> > prefer using the message bus.
> > > As far as I understand, ceilometer and aodh APIs do not provide
> > immediate notifications. If we use the APIs, we will have to poll the
> > data periodically and look for changes, and we will get them in delay.
> > By listening to the message bus we can get the notifications
> > immediately, like we do with other openstack components.
> > >
> > > Is there an advantage in using the API instead?
> > > And what do you mean by "aggregation on events data"? what kind of
> > aggregations can we do?
> > >
> > >
> > is the idea that you don't want to use a webhook to be notified? when
> > an alarm is computed by aodh-evaluator, it sends this alarm (via
> > message
> > queue) to aodh-notifier which in turns does the webhook. if you just
> > disable aodh-notifier, the alarm won't be consumed and you can listen
> > to it yourself.
>
> We have two motivations: one is that we want to get notifications on every
> change, but we don't want to register our webhook to each and every alarm;
> and the other is that we already listen to the message bus for other
> openstack components, so we would like to handle aodh the same way.
>
> If we disable aodh-notifier, won't it have other impacts on the system?
> What if someone else used a webhook, and won't be notified because we
> disabled the notifier?
>
> > alternatively, it was discussed that maybe adding a zaqar notifier
> > would be useful. that way, aodh-notifier would send alarm to zaqar and
> > you could configure it to requeue or maybe send a smtp.
>
> What are the advantages of using Zaqar over using the message bus? Is the
> solution you suggested already supported?
>


This work is currently in progress, I'm hoping to get this support into
Mitaka.


>
> Thanks,
> Ifat.
>
>
>
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-- 
--
Pradeep Kilambi; irc: prad
OpenStack Engineering
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