[Hawkular-dev] Proposing closer integration of APM and "Hawkular metrics" on Kubernetes / OpenShift

[Heiko W.Rupp]

On 28 Feb 2017, at 0:23, neil.okamoto+hawkular at gmail.com wrote:

> From the outside looking in, this proposal seems to assume 
> monitoring/metrics are similar enough to APM traces that they can and 
> should converge in a single collection system. Whereas

Scenario 2 may be unclear here. I did not try to imply that this
may be the same collection system or that they are close enough,
but rather the same "forwarding" system.
Right now one would e.g. deploy Jolokia + DropWizard Metrics
to expose the classic metrics and also the APM agent for the
traces.
This means double configuration, potentially duplicated code
and a lot more places for errors.

> I would have expected the proposal was to combine the in the 
> presentation/UI *after* collection. Am I misunderstanding?

No. And this was the main focus of the 1st scenario.

> Because I would have thought the characteristics of these systems 
> would be unique enough to stay separate, e.g. the traffic rates for 
> metrics vs traces would be different, the ‘schema’ of what needs 
> to be forwarded and stored is different, and for sure the APM traces 
> need to be correlated based on their trace IDs and otherwise filtered 
> based on somewhat arbitrary tags supplied in the instrumentation.

Absolutely.

And still when you have a trace like the following

![](cid:6EE38915-A238-4335-8A96-839E1905C916 at redhat.com "Bildschirmfoto 
2017-02-28 um 10.38.00.png")

one wants to find out why it took 800ms and where the difference on 
600ms was spent. Here looking at data from the underlying pod or even 
node may be very helpful. Which is where the classical monitoring data 
comes into play.
Similarly if you have a service scaled to 3 instances and you get a 
larger variation in request time, the pod information may help you 
pinpoint the variations

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