Fix rapl collector log noise

SuperQ · SuperQ · commit dc5a94c803e8 · 2021-02-05T18:16:17.000+01:00
Catch permission denined errors in the rapl collector.

Signed-off-by: Ben Kochie &lt;superq@gmail.com&gt;
diff --git a/collector/rapl_linux.go b/collector/rapl_linux.go
@@ -60,6 +60,10 @@ func (c *raplCollector) Update(ch chan<- prometheus.Metric) error {
 			level.Debug(c.logger).Log("msg", "Platform doesn't have powercap files present", "err", err)
 			return ErrNoData
 		}
+		if errors.Is(err, os.ErrPermission) {
+			level.Debug(c.logger).Log("msg", "Can't access powercap files", "err", err)
+			return ErrNoData
+		}
 		return fmt.Errorf("failed to retrieve rapl stats: %w", err)
 	}
 

Original file line number	Diff line number	Diff line change
`@@ -60,6 +60,10 @@ func (c *raplCollector) Update(ch chan<- prometheus.Metric) error {`
`60`	`60`	`level.Debug(c.logger).Log("msg", "Platform doesn't have powercap files present", "err", err)`
`61`	`61`	`return ErrNoData`
`62`	`62`	`}`
	`63`	`+ if errors.Is(err, os.ErrPermission) {`
	`64`	`+ level.Debug(c.logger).Log("msg", "Can't access powercap files", "err", err)`
	`65`	`+ return ErrNoData`
	`66`	`+ }`
`63`	`67`	`return fmt.Errorf("failed to retrieve rapl stats: %w", err)`
`64`	`68`	`}`
`65`	`69`