On Friday, 16 October 2020 02:17:03 UTC+1, sangjae lee wrote:
>
> i really want solve this issue.
> when docker instance down, firing and catch immediately, after docker 
> instance is restart, resolve message is exactly comming.
>
>
If you *know* which docker instances should be there, then you can write a 
query using absent(). With "or" you can write an expression with alerts on 
a threshold *or* the value is completely missing.  See:
https://www.robustperception.io/absent-alerting-for-jobs
https://www.robustperception.io/absent-alerting-for-scraped-metrics

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