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promtool: Fix panic on extended tsdb analyze (#13976)

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Currently, running promtool tsdb analyze with the --extended flag
will cause an 'index out of range' error if running it
against a block that does not have any native histogram chunks.

This change ensures that promtool won't try to display data that doesn't exist.

Signed-off-by: Will Hegedus <whegedus@linode.com>
This commit is contained in:
Will Hegedus 2024-04-23 21:35:34 -04:00 committed by GitHub
parent 76b0318ed5
commit bd1878700b
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1 changed files with 4 additions and 0 deletions
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4
cmd/promtool/tsdb.go
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@ -838,6 +838,10 @@ func backfillOpenMetrics(path, outputDir string, humanReadable, quiet bool, maxB
}
func displayHistogram(dataType string, datas []int, total int) {
if len(datas) == 0 {
fmt.Printf("%s: N/A\n\n", dataType)
return
}
slices.Sort(datas)
start, end, step := generateBucket(datas[0], datas[len(datas)-1])
sum := 0