I am struggling with PromQL over an issue dealing with a metric that
changes less frequently than the scrape interval. I am trying to use
Prometheus as a pseudo event tracker and hoping to get some advice on how
to best try and accomplish my goal.
I have a random job that runs at different intervals depending on the
situation. Some instances of the job run every five minutes and some run
only once an hour or once a day. The job created a node_exporter textfile
snippet that gets scraped on 30 second interval.
Below is an example of a metric that changes only every five minutes with
the lesser scrape interval. In this scenario all the points with same value
are from the same job run. I really only care about one of those.
I have no way to know what the interval is between set for all my different
jobs. All I know is that when the value changes, a new set is in play.
What I want to do in "reduce" my dataset to deal with only distinct values.
I want to collapse these 27 entries into 3 by taking either the first or
last value of each "set".
I can not find a PromQL function/operator that does what I want. Maybe I
need to use recording rules?
All and any help is greatly appreciated.
metric_name{instance="hostname.example.net", job="external/generic",
mode="pull", name="snafu"}
9973997301 <http://voice.google.com/calls?a=nc,%2B19973997301>
<http://voice.google.com/calls?a=nc,%2B19973997301>@1673997343.774
9973997301 <http://voice.google.com/calls?a=nc,%2B19973997301>
<http://voice.google.com/calls?a=nc,%2B19973997301>
<http://voice.google.com/calls?a=nc,%2B19973997301>
<http://voice.google.com/calls?a=nc,%2B19973997301>
<http://voice.google.com/calls?a=nc,%2B19973997301>
<http://voice.google.com/calls?a=nc,%2B19973997301>
<http://voice.google.com/calls?a=nc,%2B19973997301>
<http://voice.google.com/calls?a=nc,%2B19973997301>@1673997373.764
9973997301 @1673997403.764 9973997301 @1673997433.764 9973997301
@1673997463.764 9973997301 @1673997493.764 9973997301 @1673997523.764
9973997301 @1673997553.764 9973997301 @1673997583.764
9973997601 <http://voice.google.com/calls?a=nc,%2B19973997601>
<http://voice.google.com/calls?a=nc,%2B19973997601>@1673997613.764
9973997601 <http://voice.google.com/calls?a=nc,%2B19973997601>
<http://voice.google.com/calls?a=nc,%2B19973997601>
<http://voice.google.com/calls?a=nc,%2B19973997601>
<http://voice.google.com/calls?a=nc,%2B19973997601>
<http://voice.google.com/calls?a=nc,%2B19973997601>
<http://voice.google.com/calls?a=nc,%2B19973997601>
<http://voice.google.com/calls?a=nc,%2B19973997601>
<http://voice.google.com/calls?a=nc,%2B19973997601>@1673997643.764
9973997601 @1673997673.764 9973997601 @1673997703.774 9973997601
@1673997733.764 9973997601 @1673997763.764 9973997601 @1673997793.764
9973997601 @1673997823.764 9973997601 @1673997853.863
9973997901 <http://voice.google.com/calls?a=nc,%2B19973997901>
<http://voice.google.com/calls?a=nc,%2B19973997901>@1673997913.764
9973997901 <http://voice.google.com/calls?a=nc,%2B19973997901>
<http://voice.google.com/calls?a=nc,%2B19973997901>
<http://voice.google.com/calls?a=nc,%2B19973997901>
<http://voice.google.com/calls?a=nc,%2B19973997901>
<http://voice.google.com/calls?a=nc,%2B19973997901>
<http://voice.google.com/calls?a=nc,%2B19973997901>
<http://voice.google.com/calls?a=nc,%2B19973997901>
<http://voice.google.com/calls?a=nc,%2B19973997901>@1673997943.767
9973997901 @1673997973.764 9973997901 @1673998003.764 9973997901
@1673998033.764 9973997901 @1673998063.764 9973997901 @1673998093.764
9973997901 @1673998123.764 9973997901 @1673998153.764
I have tried many of the PromQL functions/operators to try and reduce my
sets. The count_vaules() operator is the closest I have come but that works
only with instant vectors not range vectors.
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