Open Stack

Hi folks,

Currently, a notification message will be emitted when updating an alarm 
(state transition, attribute updating, creation),  this functionality 
was added by change[1], but the change didn't describe any purpose. So I 
wonder whether there is any usage of this type of notification, we can 
get the whole details about alarm change by alarm-history API. the 
notification is implicitly ignored by default, because the 
"notification_driver"config option won't be configured by default.  if 
we enable this option in aodh.conf and enable the "store_events" in 
ceilometer.conf, this type of notifications will be stored as events. so 
maybe some users want to aggregate this with events ? what's your opinion ?

I have made a change try to deprecate this notification, see [2].

[1] https://review.openstack.org/#/c/48949/
[2] https://review.openstack.org/#/c/246727/

BR
Liu sheng
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