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This has the advantage that the user doesn't need to list all labels they want to keep (as with "by") but without having to worry about inconsistent labels as when there's only one time series (as with "keeping_common"). Almost all aggregation should use this rather than the existing two options as it's much less error prone and easier to maintain due to not having to always add in "job" plus whatever other common job-level labels you have like "region".
116 lines
3.8 KiB
Plaintext
116 lines
3.8 KiB
Plaintext
load 5m
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http_requests{job="api-server", instance="0", group="production"} 0+10x10
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http_requests{job="api-server", instance="1", group="production"} 0+20x10
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http_requests{job="api-server", instance="0", group="canary"} 0+30x10
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http_requests{job="api-server", instance="1", group="canary"} 0+40x10
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http_requests{job="app-server", instance="0", group="production"} 0+50x10
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http_requests{job="app-server", instance="1", group="production"} 0+60x10
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http_requests{job="app-server", instance="0", group="canary"} 0+70x10
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http_requests{job="app-server", instance="1", group="canary"} 0+80x10
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load 5m
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foo{job="api-server", instance="0", region="europe"} 0+90x10
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foo{job="api-server"} 0+100x10
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# Simple sum.
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eval instant at 50m SUM BY (group) (http_requests{job="api-server"})
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{group="canary"} 700
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{group="production"} 300
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# Test alternative "by"-clause order.
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eval instant at 50m sum by (group) (http_requests{job="api-server"})
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{group="canary"} 700
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{group="production"} 300
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# Simple average.
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eval instant at 50m avg by (group) (http_requests{job="api-server"})
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{group="canary"} 350
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{group="production"} 150
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# Simple count.
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eval instant at 50m count by (group) (http_requests{job="api-server"})
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{group="canary"} 2
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{group="production"} 2
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# Simple without.
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eval instant at 50m sum without (instance) (http_requests{job="api-server"})
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{group="canary",job="api-server"} 700
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{group="production",job="api-server"} 300
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# Without with mismatched and missing labels. Do not do this.
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eval instant at 50m sum without (instance) (http_requests{job="api-server"} or foo)
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{group="canary",job="api-server"} 700
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{group="production",job="api-server"} 300
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{region="europe",job="api-server"} 900
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{job="api-server"} 1000
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# Lower-cased aggregation operators should work too.
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eval instant at 50m sum(http_requests) by (job) + min(http_requests) by (job) + max(http_requests) by (job) + avg(http_requests) by (job)
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{job="app-server"} 4550
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{job="api-server"} 1750
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# Test alternative "by"-clause order with "keep_common".
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eval instant at 50m sum by (group) keep_common (http_requests{job="api-server"})
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{group="canary", job="api-server"} 700
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{group="production", job="api-server"} 300
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# Test both alternative "by"-clause orders in one expression.
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# Public health warning: stick to one form within an expression (or even
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# in an organization), or risk serious user confusion.
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eval instant at 50m sum(sum by (group) keep_common (http_requests{job="api-server"})) by (job)
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{job="api-server"} 1000
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# Standard deviation and variance.
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eval instant at 50m stddev(http_requests)
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{} 229.12878474779
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eval instant at 50m stddev by (instance)(http_requests)
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{instance="0"} 223.60679774998
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{instance="1"} 223.60679774998
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eval instant at 50m stdvar(http_requests)
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{} 52500
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eval instant at 50m stdvar by (instance)(http_requests)
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{instance="0"} 50000
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{instance="1"} 50000
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# Regression test for missing separator byte in labelsToGroupingKey.
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clear
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load 5m
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label_grouping_test{a="aa", b="bb"} 0+10x10
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label_grouping_test{a="a", b="abb"} 0+20x10
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eval instant at 50m sum(label_grouping_test) by (a, b)
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{a="a", b="abb"} 200
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{a="aa", b="bb"} 100
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# Tests for min/max.
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clear
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load 5m
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http_requests{job="api-server", instance="0", group="production"} 1
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http_requests{job="api-server", instance="1", group="production"} 2
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http_requests{job="api-server", instance="0", group="canary"} NaN
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http_requests{job="api-server", instance="1", group="canary"} 3
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http_requests{job="api-server", instance="2", group="canary"} 4
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eval instant at 0m max(http_requests)
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{} 4
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eval instant at 0m min(http_requests)
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{} 1
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eval instant at 0m max by (group) (http_requests)
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{group="production"} 2
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{group="canary"} 4
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eval instant at 0m min by (group) (http_requests)
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{group="production"} 1
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{group="canary"} 3
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