Prometheus promql: Difference between revisions
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= Comments = | = Comments = | ||
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# a comment | # a comment | ||
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== Floats == | == Floats == | ||
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<syntaxhighlight lang=" | <syntaxhighlight lang="bash"> | ||
23 | 23 | ||
-2.43 | -2.43 | ||
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These metric selectors can be composed and filtered. | These metric selectors can be composed and filtered. | ||
<syntaxhighlight lang=" | <syntaxhighlight lang="bash"> | ||
{__name__="your_metric_name"} | {__name__="your_metric_name"} # query all (you can match multiple metrics this way) | ||
your_metric_name | your_metric_name # query all | ||
your_metric_name[5min] | your_metric_name[5min] # lump data into 5min clumps | ||
your_metric_name{job="foo",group="bar"} | your_metric_name{job="foo",group="bar"} # filter by metric-labels | ||
</syntaxhighlight> | </syntaxhighlight> | ||
</blockquote><!-- Metric-Selector --> | </blockquote><!-- Metric-Selector --> | ||
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<blockquote> | <blockquote> | ||
label metrics support various matchers/operators | label metrics support various matchers/operators | ||
<syntaxhighlight lang=" | <syntaxhighlight lang="bash"> | ||
= | = # equal | ||
!= | != # not-equal | ||
=~ | =~ # regex match | ||
!~ | !~ # not regex match | ||
</syntaxhighlight> | </syntaxhighlight> | ||
</blockquote><!-- Operators --> | </blockquote><!-- Operators --> | ||
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are these aggregates averages? sums? greatest-value? | are these aggregates averages? sums? greatest-value? | ||
}} | }} | ||
<syntaxhighlight lang=" | <syntaxhighlight lang="bash"> | ||
your_metric_name[5min] | your_metric_name[5min] # lump data into 5min clumps | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Units | Units | ||
<syntaxhighlight lang=" | <syntaxhighlight lang="bash"> | ||
ms | ms # milliseconds | ||
s | s # seconds | ||
m | m # minutes | ||
h | h # hours | ||
d | d # days | ||
w | w # weeks | ||
y | y # years | ||
</syntaxhighlight> | </syntaxhighlight> | ||
</blockquote><!-- Clustering Metrics --> | </blockquote><!-- Clustering Metrics --> | ||
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== Query Time Ranges == | == Query Time Ranges == | ||
<blockquote> | <blockquote> | ||
<syntaxhighlight lang=" | <syntaxhighlight lang="bash"> | ||
your_metric_name offset 5min | your_metric_name offset 5min # query 5min-ago until present | ||
your_metric_name @ 1609746000 | your_metric_name @ 1609746000 # query at exactly '2021-01-04T07:40:00+00:00' | ||
</syntaxhighlight> | </syntaxhighlight> | ||
</blockquote><!-- Offset Time Ranges --> | </blockquote><!-- Offset Time Ranges --> | ||
</blockquote><!-- Queries --> | </blockquote><!-- Queries --> | ||
Revision as of 00:48, 18 February 2022
PromQL is prometheus's query language.
It's syntax is inspired by golang.
You can query prometheus from
- HTTP API
- in the UI's graph?
Documentation
official docs https://prometheus.io/docs/prometheus/latest/querying/basics/ official examples https://prometheus.io/docs/prometheus/latest/querying/examples/ re2 (regex engine) https://github.com/google/re2/wiki/Syntax
Comments
# a comment
Datatypes
Strings
# string "foo" `foo` # string-literal 'foo\nbar'Floats
23 -2.43 3.4e-9 0x8f -Inf NaN
Queries
Metric-Selector
The most basic query you can use is
your_metric_namewhich queries all samples for that metric.
These metric selectors can be composed and filtered.{__name__="your_metric_name"} # query all (you can match multiple metrics this way) your_metric_name # query all your_metric_name[5min] # lump data into 5min clumps your_metric_name{job="foo",group="bar"} # filter by metric-labelsOperators
label metrics support various matchers/operators
= # equal != # not-equal =~ # regex match !~ # not regex matchClustering Metrics
TODO:
are these aggregates averages? sums? greatest-value?
your_metric_name[5min] # lump data into 5min clumpsUnits
ms # milliseconds s # seconds m # minutes h # hours d # days w # weeks y # yearsQuery Time Ranges
your_metric_name offset 5min # query 5min-ago until present your_metric_name @ 1609746000 # query at exactly '2021-01-04T07:40:00+00:00'
