feat(mountstats): added operations errors

feat(mountstats): fixed indentation bug

feat(mountstats): fixed indentation bug

collector/mountstats_linux.go

@@ -53,6 +53,7 @@ type mountStatsCollector struct {
 	NFSOperationsQueueTimeSecondsTotal    *prometheus.Desc
 	NFSOperationsResponseTimeSecondsTotal *prometheus.Desc
 	NFSOperationsRequestTimeSecondsTotal  *prometheus.Desc
+	NFSOperationsErrorsTotal              *prometheus.Desc
 
 	// Transport statistics
 	NFSTransportBindTotal              *prometheus.Desc
@@ -322,6 +323,13 @@ func NewMountStatsCollector(logger log.Logger) (Collector, error) {
 			nil,
 		),
 
+		NFSOperationsErrorsTotal: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, subsystem, "operations_errors_total"),
+			"Number of errors for a given operation",
+			opLabels,
+			nil,
+		),
+
 		NFSEventInodeRevalidateTotal: prometheus.NewDesc(
 			prometheus.BuildFQName(namespace, subsystem, "event_inode_revalidate_total"),
 			"Number of times cached inode attributes are re-validated from the server.",
@@ -745,6 +753,13 @@ func (c *mountStatsCollector) updateNFSStats(ch chan<- prometheus.Metric, s *pro
 			float64(op.CumulativeTotalRequestMilliseconds%float64Mantissa)/1000.0,
 			opLabelValues...,
 		)
+
+		ch <- prometheus.MustNewConstMetric(
+			c.NFSOperationsErrorsTotal,
+			prometheus.CounterValue,
+			float64(op.Errors%float64Mantissa),
+			opLabelValues...,
+		)
 	}
 
 	ch <- prometheus.MustNewConstMetric(