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Add internal metrics.

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This commit adds internal metrics so that we can assess how well the
bridge performs in production.
This commit is contained in:
Matt T. Proud 2013-07-03 15:25:52 +02:00
parent 3972654e3e
commit 4fc89e65c7
1 changed files with 40 additions and 1 deletions
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41
main.go
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@ -23,7 +23,7 @@ import (
var (
listeningAddress = flag.String("listeningAddress", ":8080", "The address on which to expose generated Prometheus metrics.")
statsdListeningAddress = flag.String("statsdListeningAddress", ":8126", "The UDP address on which to receive statsd metric lines.")
summaryFlushInterval = flag.Duration("summaryFlushInterval", time.Hour, "How frequently to reset all summary metrics.")
summaryFlushInterval = flag.Duration("summaryFlushInterval", 15*time.Minute, "How frequently to reset all summary metrics.")
)
type CounterContainer struct {
@ -146,14 +146,30 @@ func (b *Bridge) Listen(e <-chan Events) {
case *CounterEvent:
counter := b.Counters.Get(metricName + "_counter")
counter.IncrementBy(prometheus.NilLabels, event.Value())
eventStats.Increment(map[string]string{"type": "counter"})
case *GaugeEvent:
gauge := b.Gauges.Get(metricName + "_gauge")
gauge.Set(prometheus.NilLabels, event.Value())
eventStats.Increment(map[string]string{"type": "gauge"})
case *TimerEvent:
summary := b.Summaries.Get(metricName + "_timer")
summary.Add(prometheus.NilLabels, event.Value())
sum := b.Counters.Get(metricName + "_timer_total")
sum.IncrementBy(prometheus.NilLabels, event.Value())
count := b.Counters.Get(metricName + "_timer_count")
count.Increment(prometheus.NilLabels)
eventStats.Increment(map[string]string{"type": "timer"})
default:
log.Println("Unsupported event type")
eventStats.Increment(map[string]string{"type": "illegal"})
}
}
}
@ -217,6 +233,7 @@ func (l *StatsDListener) handlePacket(packet []byte, e chan<- Events) {
elements := strings.Split(line, ":")
if len(elements) < 2 {
networkStats.Increment(map[string]string{"type": "malformed_line"})
log.Println("Bad line from StatsD:", line)
continue
}
@ -226,6 +243,7 @@ func (l *StatsDListener) handlePacket(packet []byte, e chan<- Events) {
components := strings.Split(sample, "|")
samplingFactor := 1.0
if len(components) < 2 || len(components) > 3 {
networkStats.Increment(map[string]string{"type": "malformed_component"})
log.Println("Bad component on line:", line)
continue
}
@ -233,21 +251,25 @@ func (l *StatsDListener) handlePacket(packet []byte, e chan<- Events) {
value, err := strconv.ParseFloat(valueStr, 64)
if err != nil {
log.Printf("Bad value %s on line: %s", valueStr, line)
networkStats.Increment(map[string]string{"type": "malformed_value"})
continue
}
if len(components) == 3 {
if statType != "c" {
log.Println("Illegal sampling factor for non-counter metric on line", line)
networkStats.Increment(map[string]string{"type": "illegal_sample_factor"})
}
samplingStr := components[2]
if samplingStr[0] != '@' {
log.Printf("Invalid sampling factor %s on line %s", samplingStr, line)
networkStats.Increment(map[string]string{"type": "invalid_sample_factor"})
continue
}
samplingFactor, err = strconv.ParseFloat(samplingStr[1:], 64)
if err != nil {
log.Printf("Invalid sampling factor %s on line %s", samplingStr, line)
networkStats.Increment(map[string]string{"type": "invalid_sample_factor"})
continue
}
if samplingFactor == 0 {
@ -261,9 +283,11 @@ func (l *StatsDListener) handlePacket(packet []byte, e chan<- Events) {
event, err := buildEvent(statType, metric, value)
if err != nil {
log.Printf("Error building event on line %s: %s", line, err)
networkStats.Increment(map[string]string{"type": "illegal_event"})
continue
}
events = append(events, event)
networkStats.Increment(map[string]string{"type": "legal"})
}
}
e <- events
@ -303,6 +327,10 @@ func udpAddrFromString(addr string) *net.UDPAddr {
func main() {
flag.Parse()
log.Println("Starting StatsD -> Prometheus Bridge...")
log.Println("Accepting StatsD Traffic on", *statsdListeningAddress)
log.Println("Accepting Prometheus Requests on", *listeningAddress)
go serveHTTP()
events := make(chan Events, 1024)
@ -324,3 +352,14 @@ func main() {
}()
bridge.Listen(events)
}
var (
eventStats = prometheus.NewCounter()
networkStats = prometheus.NewCounter()
)
func init() {
prometheus.Register("statsd_bridge_events_total", "The total number of StatsD events seen.", prometheus.NilLabels, eventStats)
prometheus.Register("statsd_bridge_packets_total", "The total number of StatsD packets seen.", prometheus.NilLabels, networkStats)
}