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Adjust collector to use separate connection per scrape (#931)

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Fixes #921

Signed-off-by: Joe Adams <github@joeadams.io>
This commit is contained in:
Joe Adams
2023-10-10 07:07:37 -04:00
committed by GitHub
parent f0f051cb9a
commit 2a5692c028
2 changed files with 13 additions and 3 deletions
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9
collector/collector.go
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@@ -167,19 +167,22 @@ func (p PostgresCollector) Describe(ch chan<- *prometheus.Desc) {
func (p PostgresCollector) Collect(ch chan<- prometheus.Metric) {
ctx := context.TODO()
// copy the instance so that concurrent scrapes have independent instances
inst := p.instance.copy()
// Set up the database connection for the collector.
err := p.instance.setup()
err := inst.setup()
if err != nil {
level.Error(p.logger).Log("msg", "Error opening connection to database", "err", err)
return
}
defer p.instance.Close()
defer inst.Close()
wg := sync.WaitGroup{}
wg.Add(len(p.Collectors))
for name, c := range p.Collectors {
go func(name string, c Collector) {
execute(ctx, name, c, p.instance, ch, p.logger)
execute(ctx, name, c, inst, ch, p.logger)
wg.Done()
}(name, c)
}