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Merge pull request #72 from jacksontj/master

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Fixes for crashes with conflicting metric values
This commit is contained in:
Tobias Schmidt 2017-07-18 20:19:59 +02:00 committed by GitHub
commit 8b40f781ef
2 changed files with 50 additions and 27 deletions
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69
exporter.go
View file

@ -69,7 +69,7 @@ func NewCounterContainer() *CounterContainer {
}
}
func (c *CounterContainer) Get(metricName string, labels prometheus.Labels) prometheus.Counter {
func (c *CounterContainer) Get(metricName string, labels prometheus.Labels) (prometheus.Counter, error) {
hash := hashNameAndLabels(metricName, labels)
counter, ok := c.Elements[hash]
if !ok {
@ -78,12 +78,12 @@ func (c *CounterContainer) Get(metricName string, labels prometheus.Labels) prom
Help: defaultHelp,
ConstLabels: labels,
})
c.Elements[hash] = counter
if err := prometheus.Register(counter); err != nil {
log.Fatalf(regErrF, metricName, err)
return nil, err
}
c.Elements[hash] = counter
}
return counter
return counter, nil
}
type GaugeContainer struct {
@ -96,7 +96,7 @@ func NewGaugeContainer() *GaugeContainer {
}
}
func (c *GaugeContainer) Get(metricName string, labels prometheus.Labels) prometheus.Gauge {
func (c *GaugeContainer) Get(metricName string, labels prometheus.Labels) (prometheus.Gauge, error) {
hash := hashNameAndLabels(metricName, labels)
gauge, ok := c.Elements[hash]
if !ok {
@ -105,12 +105,12 @@ func (c *GaugeContainer) Get(metricName string, labels prometheus.Labels) promet
Help: defaultHelp,
ConstLabels: labels,
})
c.Elements[hash] = gauge
if err := prometheus.Register(gauge); err != nil {
log.Fatalf(regErrF, metricName, err)
return nil, err
}
c.Elements[hash] = gauge
}
return gauge
return gauge, nil
}
type SummaryContainer struct {
@ -123,7 +123,7 @@ func NewSummaryContainer() *SummaryContainer {
}
}
func (c *SummaryContainer) Get(metricName string, labels prometheus.Labels) prometheus.Summary {
func (c *SummaryContainer) Get(metricName string, labels prometheus.Labels) (prometheus.Summary, error) {
hash := hashNameAndLabels(metricName, labels)
summary, ok := c.Elements[hash]
if !ok {
@ -133,12 +133,12 @@ func (c *SummaryContainer) Get(metricName string, labels prometheus.Labels) prom
Help: defaultHelp,
ConstLabels: labels,
})
c.Elements[hash] = summary
if err := prometheus.Register(summary); err != nil {
log.Fatalf(regErrF, metricName, err)
return nil, err
}
c.Elements[hash] = summary
}
return summary
return summary, nil
}
type Event interface {
@ -233,10 +233,6 @@ func (b *Exporter) Listen(e <-chan Events) {
switch ev := event.(type) {
case *CounterEvent:
counter := b.Counters.Get(
b.suffix(metricName, "counter"),
prometheusLabels,
)
// We don't accept negative values for counters. Incrementing the counter with a negative number
// will cause the exporter to panic. Instead we will warn and continue to the next event.
if event.Value() < 0.0 {
@ -244,32 +240,51 @@ func (b *Exporter) Listen(e <-chan Events) {
continue
}
counter.Add(event.Value())
counter, err := b.Counters.Get(
b.suffix(metricName, "counter"),
prometheusLabels,
)
if err == nil {
counter.Add(event.Value())
eventStats.WithLabelValues("counter").Inc()
eventStats.WithLabelValues("counter").Inc()
} else {
log.Errorf(regErrF, metricName, err)
conflictingEventStats.WithLabelValues("counter").Inc()
}
case *GaugeEvent:
gauge := b.Gauges.Get(
gauge, err := b.Gauges.Get(
b.suffix(metricName, "gauge"),
prometheusLabels,
)
if ev.relative {
gauge.Add(event.Value())
if err == nil {
if ev.relative {
gauge.Add(event.Value())
} else {
gauge.Set(event.Value())
}
eventStats.WithLabelValues("gauge").Inc()
} else {
gauge.Set(event.Value())
log.Errorf(regErrF, metricName, err)
conflictingEventStats.WithLabelValues("gauge").Inc()
}
eventStats.WithLabelValues("gauge").Inc()
case *TimerEvent:
summary := b.Summaries.Get(
summary, err := b.Summaries.Get(
b.suffix(metricName, "timer"),
prometheusLabels,
)
summary.Observe(event.Value())
if err == nil {
summary.Observe(event.Value())
eventStats.WithLabelValues("timer").Inc()
eventStats.WithLabelValues("timer").Inc()
} else {
log.Errorf(regErrF, metricName, err)
conflictingEventStats.WithLabelValues("timer").Inc()
}
default:
log.Errorln("Unsupported event type")

8
telemetry.go
View file

@ -47,6 +47,13 @@ var (
Name: "statsd_exporter_loaded_mappings",
Help: "The current number of configured metric mappings.",
})
conflictingEventStats = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "statsd_exporter_events_conflict_total",
Help: "The total number of StatsD events with conflicting names.",
},
[]string{"type"},
)
)
func init() {
@ -54,4 +61,5 @@ func init() {
prometheus.MustRegister(networkStats)
prometheus.MustRegister(configLoads)
prometheus.MustRegister(mappingsCount)
prometheus.MustRegister(conflictingEventStats)
}