mirror of
https://github.com/prometheus/statsd_exporter.git
synced 2024-05-28 14:08:10 +00:00
94 lines
2.3 KiB
Go
94 lines
2.3 KiB
Go
// 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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"flag"
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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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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/exp"
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)
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var (
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listeningAddress = flag.String("listeningAddress", ":8080", "The address on which to expose generated Prometheus metrics.")
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statsdListeningAddress = flag.String("statsdListeningAddress", ":9125", "The UDP address on which to receive statsd metric lines.")
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mappingConfig = flag.String("mappingConfig", "mapping.conf", "Metric mapping configuration file name.")
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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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func serveHTTP() {
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exp.Handle(prometheus.ExpositionResource, prometheus.DefaultHandler)
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http.ListenAndServe(*listeningAddress, exp.DefaultCoarseMux)
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}
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func udpAddrFromString(addr string) *net.UDPAddr {
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host, portStr, err := net.SplitHostPort(*statsdListeningAddress)
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if err != nil {
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log.Fatal("Bad StatsD listening address", *statsdListeningAddress)
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}
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if host == "" {
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host = "0.0.0.0"
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}
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ip, err := net.ResolveIPAddr("ip", host)
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if err != nil {
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log.Fatalf("Unable to resolve %s: %s", host, err)
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}
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port, err := strconv.Atoi(portStr)
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if err != nil || port < 0 || port > 65535 {
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log.Fatal("Bad port %s: %s", portStr, err)
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}
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return &net.UDPAddr{
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IP: ip.IP,
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Port: port,
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Zone: ip.Zone,
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}
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}
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func main() {
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flag.Parse()
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log.Println("Starting StatsD -> Prometheus Bridge...")
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log.Println("Accepting StatsD Traffic on", *statsdListeningAddress)
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log.Println("Accepting Prometheus Requests on", *listeningAddress)
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go serveHTTP()
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events := make(chan Events, 1024)
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defer close(events)
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listenAddr := udpAddrFromString(*statsdListeningAddress)
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conn, err := net.ListenUDP("udp", listenAddr)
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if err != nil {
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log.Fatal(err)
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}
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l := &StatsDListener{conn: conn}
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go l.Listen(events)
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mapper := metricMapper{}
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if mappingConfig != nil {
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err := mapper.initFromFile(*mappingConfig)
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if err != nil {
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log.Fatal("Error loading config:", err)
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}
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}
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bridge := NewBridge(&mapper)
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go func() {
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for _ = range time.Tick(*summaryFlushInterval) {
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bridge.Summaries.Flush()
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}
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}()
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bridge.Listen(events)
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}
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