[Hawkular-dev] availability and metric endpoints

[Lukas Krejci]

On Friday, March 20, 2015 09:03:19 mike thompson wrote:
> > On 20 Mar 2015, at 08:19, Lukas Krejci <lkrejci at redhat.com> wrote:
> > 
> > I think the "metrics" should actually be dropped instead of "numeric”.
> 
> The only thing about ‘numeric’ is that it is not very specific. Numeric just
> means number — every metric is a number so its really not adding anything.
> Even availability data is numeric.

Isn't metrics going to store "events" eventually, too? Those would be textual, 
wouldn't they?

Also, IMHO, even config could be stored in metrics. Even though that is a bit 
of a stretch, configuration is after all a time series of structured data...

You're right that at the moment numeric doesn't add much information. So maybe 
instead of that, the type would specify what should be done with the metric?

Something along the lines of dropwizard-metrics' distinction between a meter, 
counter, gauge, histogram, etc?

So like:

http://asdf.com/hawkular/metrics/tenant1/histogram/{id}
http://asdf.com/hawkular/metrics/tenant1/counter/{id}


> > Hawk metrics will never deal with anything else than some kind of metric,
> > so way have it in the path? On the other hand having the type of the
> > metric in the path is IMHO more useful.
> > 
> > It is the context root of the metrics rest web app that should be called
> > "metrics", IMHO.
> > 
> > So the paths in metrics would look like:
> > 
> > /{tenantId}/numeric/data
> > /{tenantId}/availability/data
> > 
> > and the REST API user would reach those on the URLs like:
> > 
> > http://asdf.com/hawkular/metrics/tenant1/numeric/{id}/data
> > 
> > conversely, inventory could be reached on the same host like:
> > 
> > http://asdf.com/hawkular/inventory/tenant1/production/resources/{id}
> > 
> > On Friday, March 20, 2015 11:00:22 John Sanda wrote:
> >> There has been some good discussion around availability lately. I want to
> >> add one more to the mix, but hopefully this one is not as in-depth as
> >> some
> >> of the other topics. Right in metrics we have endpoints like,
> >> 
> >> POST   /metrics/numeric/data
> >> GET     /metrics/numeric/{id}/data
> >> POST  /metrics/availability/data
> >> GET    /metrics/availability/{id}/data
> >> 
> >> I would like to change these to,
> >> 
> >> POST   /metrics/data
> >> GET     /metrics/{id}/data
> >> POST  /availability/data
> >> GET    /availability/{id}/data
> >> 
> >> I think the “metrics” prefix is awkward and unnecessary. I think that it
> >> is
> >> intuitive enough that metrics on its own refers to numeric data.
> >> Thoughts?
> >> 
> >> 
> >> - John
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> > 
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