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absent_over_time and absent #2893

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cyriltovena opened this issue Nov 6, 2020 · 2 comments · Fixed by #3053
Closed

absent_over_time and absent #2893

cyriltovena opened this issue Nov 6, 2020 · 2 comments · Fixed by #3053

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@cyriltovena
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cyriltovena commented Nov 6, 2020 •
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Like for Prometheus https://prometheus.io/docs/prometheus/latest/querying/functions/#absent_over_time

absent_over_time can be useful for alerting when a stream disappears for too long. aka something stopped logging.

absent() should also be implemented for vectors generated by range aggregations.
@cyriltovena cyriltovena changed the title absent_over_time absent_over_time and absent Nov 6, 2020
@tabnul
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tabnul commented Dec 2, 2020

eagerly waiting for this too.
what are possible workarounds?
I am thinking of a time function like in prometheus (Extract last log record time from current time and alert if there is a result bigger than 5 minutes), but this doesnt seem possible either.

@ruanbekker
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Hey @tabnul , I made a workaround that fits my use-case, where I alert to slack when log content is not visible within one minute using AWS Lambda and CloudWatch Events:

cyriltovena added a commit to cyriltovena/loki that referenced this issue Dec 7, 2020
@cyriltovena
Add absent_over_time
e7e4015 
This adds absent_over_time which is super useful when alerting, it can be combine with any logql selector including parsers and filter to returns a timeseries with 1  when logs go missing.

Fixes grafana#2893

Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>
@cyriltovena cyriltovena mentioned this issue Dec 7, 2020
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cyriltovena added a commit that referenced this issue Dec 8, 2020
@cyriltovena
Add absent_over_time (#3053)
6d85c7c 
* Add absent_over_time

This adds absent_over_time which is super useful when alerting, it can be combine with any logql selector including parsers and filter to returns a timeseries with 1  when logs go missing.

Fixes #2893

Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>

* Adds comment.

Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com>
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Add absent_over_time cyriltovena/loki
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@ruanbekker @cyriltovena @tabnul