mirror of
https://github.com/prometheus/statsd_exporter.git
synced 2024-05-22 02:58:11 +00:00
Separate bridge into new file.
This commit is contained in:
Julius Volz
parent
fc22870425
commit
42ad6cb8d6
311
bridge.go
Normal file
311
bridge.go
Normal file
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@ -0,0 +1,311 @@
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// Copyright (c) 2013, Prometheus Team
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// All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"fmt"
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"log"
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"net"
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"strconv"
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"strings"
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"github.com/prometheus/client_golang/prometheus"
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)
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type CounterContainer struct {
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Elements map[string]prometheus.Counter
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}
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func NewCounterContainer() *CounterContainer {
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return &CounterContainer{
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Elements: make(map[string]prometheus.Counter),
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}
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}
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func (c *CounterContainer) Get(metricName string) prometheus.Counter {
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counter, ok := c.Elements[metricName]
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if !ok {
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counter = prometheus.NewCounter()
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c.Elements[metricName] = counter
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prometheus.Register(metricName, "", prometheus.NilLabels, counter)
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}
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return counter
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}
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type GaugeContainer struct {
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Elements map[string]prometheus.Gauge
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}
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func NewGaugeContainer() *GaugeContainer {
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return &GaugeContainer{
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Elements: make(map[string]prometheus.Gauge),
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}
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}
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func (c *GaugeContainer) Get(metricName string) prometheus.Gauge {
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gauge, ok := c.Elements[metricName]
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if !ok {
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gauge = prometheus.NewGauge()
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c.Elements[metricName] = gauge
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prometheus.Register(metricName, "", prometheus.NilLabels, gauge)
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}
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return gauge
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}
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type SummaryContainer struct {
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Elements map[string]prometheus.Histogram
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}
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func NewSummaryContainer() *SummaryContainer {
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return &SummaryContainer{
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Elements: make(map[string]prometheus.Histogram),
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}
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}
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func (c *SummaryContainer) Get(metricName string) prometheus.Histogram {
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summary, ok := c.Elements[metricName]
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if !ok {
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summary = prometheus.NewDefaultHistogram()
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c.Elements[metricName] = summary
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prometheus.Register(metricName, "", prometheus.NilLabels, summary)
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}
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return summary
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}
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func (c *SummaryContainer) Flush() {
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for _, summary := range c.Elements {
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summary.ResetAll()
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}
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}
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type Event interface {
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MetricName() string
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Value() float64
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}
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type CounterEvent struct {
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metricName string
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value float64
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}
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func (c *CounterEvent) MetricName() string { return c.metricName }
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func (c *CounterEvent) Value() float64 { return c.value }
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type GaugeEvent struct {
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metricName string
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value float64
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}
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func (g *GaugeEvent) MetricName() string { return g.metricName }
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func (g *GaugeEvent) Value() float64 { return g.value }
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type TimerEvent struct {
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metricName string
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value float64
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}
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func (t *TimerEvent) MetricName() string { return t.metricName }
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func (t *TimerEvent) Value() float64 { return t.value }
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type Events []Event
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type Bridge struct {
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Counters *CounterContainer
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Gauges *GaugeContainer
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Summaries *SummaryContainer
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mapper *metricMapper
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}
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func escapeMetricName(metricName string) string {
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// TODO: evaluate what kind of escaping we really want.
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metricName = strings.Replace(metricName, "_", "__", -1)
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metricName = strings.Replace(metricName, "-", "__", -1)
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metricName = strings.Replace(metricName, ".", "_", -1)
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return metricName
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}
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func (b *Bridge) Listen(e <-chan Events) {
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for {
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events := <-e
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for _, event := range events {
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metricName := ""
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prometheusLabels := map[string]string{}
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labels, present := b.mapper.getMapping(event.MetricName())
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if present {
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metricName = labels["name"]
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for label, value := range labels {
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if label != "name" {
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prometheusLabels[label] = value
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}
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}
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} else {
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metricName = escapeMetricName(event.MetricName())
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}
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switch event.(type) {
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case *CounterEvent:
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counter := b.Counters.Get(metricName + "_counter")
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counter.IncrementBy(prometheusLabels, event.Value())
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eventStats.Increment(map[string]string{"type": "counter"})
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case *GaugeEvent:
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gauge := b.Gauges.Get(metricName + "_gauge")
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gauge.Set(prometheusLabels, event.Value())
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eventStats.Increment(map[string]string{"type": "gauge"})
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case *TimerEvent:
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summary := b.Summaries.Get(metricName + "_timer")
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summary.Add(prometheusLabels, event.Value())
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sum := b.Counters.Get(metricName + "_timer_total")
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sum.IncrementBy(prometheusLabels, event.Value())
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count := b.Counters.Get(metricName + "_timer_count")
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count.Increment(prometheusLabels)
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eventStats.Increment(map[string]string{"type": "timer"})
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default:
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log.Println("Unsupported event type")
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eventStats.Increment(map[string]string{"type": "illegal"})
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}
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}
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}
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}
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func NewBridge(mapper *metricMapper) *Bridge {
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return &Bridge{
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Counters: NewCounterContainer(),
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Gauges: NewGaugeContainer(),
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Summaries: NewSummaryContainer(),
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mapper: mapper,
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}
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}
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type StatsDListener struct {
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conn *net.UDPConn
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}
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func buildEvent(statType, metric string, value float64) (Event, error) {
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switch statType {
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case "c":
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return &CounterEvent{
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metricName: metric,
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value: float64(value),
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}, nil
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case "g":
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return &GaugeEvent{
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metricName: metric,
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value: float64(value),
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}, nil
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case "ms":
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return &TimerEvent{
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metricName: metric,
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value: float64(value),
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}, nil
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case "s":
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return nil, fmt.Errorf("No support for StatsD sets")
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default:
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return nil, fmt.Errorf("Bad stat type %s", statType)
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}
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}
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func (l *StatsDListener) Listen(e chan<- Events) {
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// TODO: evaluate proper size according to MTU
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var buf [512]byte
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for {
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n, _, err := l.conn.ReadFromUDP(buf[0:])
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if err != nil {
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log.Fatal(err)
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}
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l.handlePacket(buf[0:n], e)
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}
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}
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func (l *StatsDListener) handlePacket(packet []byte, e chan<- Events) {
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lines := strings.Split(string(packet), "\n")
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events := Events{}
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for _, line := range lines {
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if line == "" {
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continue
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}
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elements := strings.Split(line, ":")
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if len(elements) < 2 {
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networkStats.Increment(map[string]string{"type": "malformed_line"})
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log.Println("Bad line from StatsD:", line)
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continue
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}
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metric := elements[0]
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samples := elements[1:]
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for _, sample := range samples {
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components := strings.Split(sample, "|")
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samplingFactor := 1.0
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if len(components) < 2 || len(components) > 3 {
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networkStats.Increment(map[string]string{"type": "malformed_component"})
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log.Println("Bad component on line:", line)
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continue
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}
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valueStr, statType := components[0], components[1]
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value, err := strconv.ParseFloat(valueStr, 64)
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if err != nil {
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log.Printf("Bad value %s on line: %s", valueStr, line)
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networkStats.Increment(map[string]string{"type": "malformed_value"})
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continue
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}
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if len(components) == 3 {
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if statType != "c" {
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log.Println("Illegal sampling factor for non-counter metric on line", line)
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networkStats.Increment(map[string]string{"type": "illegal_sample_factor"})
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}
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samplingStr := components[2]
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if samplingStr[0] != '@' {
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log.Printf("Invalid sampling factor %s on line %s", samplingStr, line)
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networkStats.Increment(map[string]string{"type": "invalid_sample_factor"})
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continue
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}
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samplingFactor, err = strconv.ParseFloat(samplingStr[1:], 64)
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if err != nil {
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log.Printf("Invalid sampling factor %s on line %s", samplingStr, line)
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networkStats.Increment(map[string]string{"type": "invalid_sample_factor"})
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continue
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}
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if samplingFactor == 0 {
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// This should never happen, but avoid division by zero if it does.
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log.Printf("Invalid zero sampling factor %s on line %s, setting to 1", samplingStr, line)
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samplingFactor = 1
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}
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value /= samplingFactor
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}
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event, err := buildEvent(statType, metric, value)
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if err != nil {
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log.Printf("Error building event on line %s: %s", line, err)
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networkStats.Increment(map[string]string{"type": "illegal_event"})
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continue
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}
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events = append(events, event)
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networkStats.Increment(map[string]string{"type": "legal"})
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}
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}
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e <- events
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}
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var (
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eventStats = prometheus.NewCounter()
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networkStats = prometheus.NewCounter()
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)
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func init() {
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prometheus.Register("statsd_bridge_events_total", "The total number of StatsD events seen.", prometheus.NilLabels, eventStats)
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prometheus.Register("statsd_bridge_packets_total", "The total number of StatsD packets seen.", prometheus.NilLabels, networkStats)
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}
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296
main.go
296
main.go
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@ -8,12 +8,10 @@ package main
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import (
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"flag"
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"fmt"
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"log"
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"net"
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"net/http"
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"strconv"
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"strings"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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@ -27,289 +25,6 @@ var (
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summaryFlushInterval = flag.Duration("summaryFlushInterval", 15*time.Minute, "How frequently to reset all summary metrics.")
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)
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type CounterContainer struct {
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Elements map[string]prometheus.Counter
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}
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func NewCounterContainer() *CounterContainer {
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return &CounterContainer{
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Elements: make(map[string]prometheus.Counter),
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}
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}
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func (c *CounterContainer) Get(metricName string) prometheus.Counter {
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counter, ok := c.Elements[metricName]
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if !ok {
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counter = prometheus.NewCounter()
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c.Elements[metricName] = counter
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prometheus.Register(metricName, "", prometheus.NilLabels, counter)
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}
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return counter
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}
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type GaugeContainer struct {
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Elements map[string]prometheus.Gauge
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}
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func NewGaugeContainer() *GaugeContainer {
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return &GaugeContainer{
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Elements: make(map[string]prometheus.Gauge),
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}
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}
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func (c *GaugeContainer) Get(metricName string) prometheus.Gauge {
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gauge, ok := c.Elements[metricName]
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if !ok {
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gauge = prometheus.NewGauge()
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c.Elements[metricName] = gauge
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prometheus.Register(metricName, "", prometheus.NilLabels, gauge)
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}
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return gauge
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}
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type SummaryContainer struct {
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Elements map[string]prometheus.Histogram
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}
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func NewSummaryContainer() *SummaryContainer {
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return &SummaryContainer{
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Elements: make(map[string]prometheus.Histogram),
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}
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}
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func (c *SummaryContainer) Get(metricName string) prometheus.Histogram {
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summary, ok := c.Elements[metricName]
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if !ok {
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summary = prometheus.NewDefaultHistogram()
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c.Elements[metricName] = summary
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prometheus.Register(metricName, "", prometheus.NilLabels, summary)
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}
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return summary
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}
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func (c *SummaryContainer) Flush() {
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for _, summary := range c.Elements {
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summary.ResetAll()
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}
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}
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type Event interface {
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MetricName() string
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Value() float64
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}
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type CounterEvent struct {
|
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metricName string
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value float64
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}
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func (c *CounterEvent) MetricName() string { return c.metricName }
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func (c *CounterEvent) Value() float64 { return c.value }
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type GaugeEvent struct {
|
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metricName string
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value float64
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}
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func (g *GaugeEvent) MetricName() string { return g.metricName }
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func (g *GaugeEvent) Value() float64 { return g.value }
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type TimerEvent struct {
|
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metricName string
|
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value float64
|
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}
|
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|
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func (t *TimerEvent) MetricName() string { return t.metricName }
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func (t *TimerEvent) Value() float64 { return t.value }
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type Events []Event
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|
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type Bridge struct {
|
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Counters *CounterContainer
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Gauges *GaugeContainer
|
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Summaries *SummaryContainer
|
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mapper *metricMapper
|
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}
|
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|
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func escapeMetricName(metricName string) string {
|
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// TODO: evaluate what kind of escaping we really want.
|
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metricName = strings.Replace(metricName, "_", "__", -1)
|
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metricName = strings.Replace(metricName, "-", "__", -1)
|
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metricName = strings.Replace(metricName, ".", "_", -1)
|
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return metricName
|
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}
|
||||
|
||||
func (b *Bridge) Listen(e <-chan Events) {
|
||||
for {
|
||||
events := <-e
|
||||
for _, event := range events {
|
||||
metricName := ""
|
||||
prometheusLabels := map[string]string{}
|
||||
|
||||
labels, present := b.mapper.getMapping(event.MetricName())
|
||||
if present {
|
||||
metricName = labels["name"]
|
||||
for label, value := range labels {
|
||||
if label != "name" {
|
||||
prometheusLabels[label] = value
|
||||
}
|
||||
}
|
||||
} else {
|
||||
metricName = escapeMetricName(event.MetricName())
|
||||
}
|
||||
|
||||
switch event.(type) {
|
||||
case *CounterEvent:
|
||||
counter := b.Counters.Get(metricName + "_counter")
|
||||
counter.IncrementBy(prometheusLabels, event.Value())
|
||||
|
||||
eventStats.Increment(map[string]string{"type": "counter"})
|
||||
|
||||
case *GaugeEvent:
|
||||
gauge := b.Gauges.Get(metricName + "_gauge")
|
||||
gauge.Set(prometheusLabels, event.Value())
|
||||
|
||||
eventStats.Increment(map[string]string{"type": "gauge"})
|
||||
|
||||
case *TimerEvent:
|
||||
summary := b.Summaries.Get(metricName + "_timer")
|
||||
summary.Add(prometheusLabels, event.Value())
|
||||
|
||||
sum := b.Counters.Get(metricName + "_timer_total")
|
||||
sum.IncrementBy(prometheusLabels, event.Value())
|
||||
|
||||
count := b.Counters.Get(metricName + "_timer_count")
|
||||
count.Increment(prometheusLabels)
|
||||
|
||||
eventStats.Increment(map[string]string{"type": "timer"})
|
||||
|
||||
default:
|
||||
log.Println("Unsupported event type")
|
||||
eventStats.Increment(map[string]string{"type": "illegal"})
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func NewBridge(mapper *metricMapper) *Bridge {
|
||||
return &Bridge{
|
||||
Counters: NewCounterContainer(),
|
||||
Gauges: NewGaugeContainer(),
|
||||
Summaries: NewSummaryContainer(),
|
||||
mapper: mapper,
|
||||
}
|
||||
}
|
||||
|
||||
type StatsDListener struct {
|
||||
conn *net.UDPConn
|
||||
}
|
||||
|
||||
func buildEvent(statType, metric string, value float64) (Event, error) {
|
||||
switch statType {
|
||||
case "c":
|
||||
return &CounterEvent{
|
||||
metricName: metric,
|
||||
value: float64(value),
|
||||
}, nil
|
||||
case "g":
|
||||
return &GaugeEvent{
|
||||
metricName: metric,
|
||||
value: float64(value),
|
||||
}, nil
|
||||
case "ms":
|
||||
return &TimerEvent{
|
||||
metricName: metric,
|
||||
value: float64(value),
|
||||
}, nil
|
||||
case "s":
|
||||
return nil, fmt.Errorf("No support for StatsD sets")
|
||||
default:
|
||||
return nil, fmt.Errorf("Bad stat type %s", statType)
|
||||
}
|
||||
}
|
||||
|
||||
func (l *StatsDListener) Listen(e chan<- Events) {
|
||||
// TODO: evaluate proper size according to MTU
|
||||
var buf [512]byte
|
||||
for {
|
||||
n, _, err := l.conn.ReadFromUDP(buf[0:])
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
l.handlePacket(buf[0:n], e)
|
||||
}
|
||||
}
|
||||
|
||||
func (l *StatsDListener) handlePacket(packet []byte, e chan<- Events) {
|
||||
lines := strings.Split(string(packet), "\n")
|
||||
events := Events{}
|
||||
for _, line := range lines {
|
||||
if line == "" {
|
||||
continue
|
||||
}
|
||||
|
||||
elements := strings.Split(line, ":")
|
||||
if len(elements) < 2 {
|
||||
networkStats.Increment(map[string]string{"type": "malformed_line"})
|
||||
log.Println("Bad line from StatsD:", line)
|
||||
continue
|
||||
}
|
||||
metric := elements[0]
|
||||
samples := elements[1:]
|
||||
for _, sample := range samples {
|
||||
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
|
||||
}
|
||||
valueStr, statType := components[0], components[1]
|
||||
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 {
|
||||
// This should never happen, but avoid division by zero if it does.
|
||||
log.Printf("Invalid zero sampling factor %s on line %s, setting to 1", samplingStr, line)
|
||||
samplingFactor = 1
|
||||
}
|
||||
value /= samplingFactor
|
||||
}
|
||||
|
||||
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
|
||||
}
|
||||
|
||||
func serveHTTP() {
|
||||
exp.Handle(prometheus.ExpositionResource, prometheus.DefaultHandler)
|
||||
http.ListenAndServe(*listeningAddress, exp.DefaultCoarseMux)
|
||||
|
|
@ -376,14 +91,3 @@ 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)
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue