[Hawkular-dev] agent "new server" event

[Jay Shaughnessy]

The idea to limit inventory's responsibilities, and then the metrics TTL 
discussion, sort of led me towards another idea.  Perhaps we could 
eliminate inventory and metrics from this feature, and also let the 
agent be "dumb" and just configuration driven.  We could add agent 
meta-data on resource types we want reported when newly-discovered.  I 
suppose we could have a variety of notification-types but 
"on-initial-discovery" would be the only thing of interest at the 
moment, and only on server types.

The agent could make a rest call to hServices (glue code) notifying of a 
new resource discovery.  It could report this multiple times (like on 
every startup).  The glue code would just check to see if there was 
already an event for this and if not it would generate one.  This is via 
the alerting API, bypassing metrics and inventory, no TTL issues, etc.  
The logic is centralized and the agent doesn't really have to do 
anything very smart (I think).  We could feasibly do other things in the 
hServices code, like update an existing event (via tag) each time to 
keep track of recency, perhaps allowing some sort of event generation 
for "removed resource" when we haven't been updated in a long time.

Thoughts?


On 3/29/2017 11:40 AM, Heiko W.Rupp wrote:
> On 29 Mar 2017, at 15:22, John Sanda wrote:
>
>>> This needs to be well documented as this is not what you
>>> expect when you delete metrics in an urgency to free up space.
>> [..] It needs to be included in the user guide as well.
> This is what I meant. Sorry for not being more clear.
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