Hello,

I'm trying to figure out how to federate my cloudwatch_exporter metrics. 

The default metrics are 10m old, I understand that this is needed because 
cloudwatch consolidate metrics over time. My prometheus is scraping the 
exporter and saving the values with the original timestamp. Federation 
queries (as they are instant queries) cannot retrieve those metrics.

So, I think that my only options are:

   - set_timestamp -> false (fake illusion of real time metric, which are 
   really 10m old)
   - delay_seconds -> 1s-5m (metric might not be consolidated in cloudwatch)

There's anything else I can try? I don't like any of those two methods for 
the exposed reasons. I've been looking at the changes in stale logic for 
2.0, but I don't know if this applies to me or how to do it: 

If you're federating instance-level metrics, switch to only aggregated 
> metrics
>

So, what's the recommended way to overcome this?

Many thanks.

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