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vmagent: update SD duration histogram metric if SD is active (#2677)

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The change updates histogram for registering SD update duration
only SD is considered as `active`. SD is active if at least
one scraper for this SD has started.

This change supposed to reduce metrics cardinality produced
by duration histogram which gets updated even if SD isn't configured.

See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2671

Signed-off-by: hagen1778 <roman@victoriametrics.com>
This commit is contained in:
Roman Khavronenko 2022-06-07 14:46:44 +02:00 committed by GitHub
parent a93deb307f
commit 63b538ecd1
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1 changed files with 5 additions and 1 deletions
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6
lib/promscrape/scraper.go
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@ -256,7 +256,11 @@ func (scfg *scrapeConfig) run(globalStopCh <-chan struct{}) {
sws := scfg.getScrapeWork(cfg, swsPrev)
sg.update(sws)
swsPrev = sws
scfg.discoveryDuration.UpdateDuration(startTime)
if sg.scrapersStarted.Get() > 0 {
// update duration only if at least one scraper has started
// otherwise this SD is considered as inactive
scfg.discoveryDuration.UpdateDuration(startTime)
}
}
updateScrapeWork(cfg)
atomic.AddInt32(&PendingScrapeConfigs, -1)