mirror of
https://github.com/prometheus/statsd_exporter.git
synced 2024-09-27 05:09:58 +00:00
184 lines
5.3 KiB
Go
184 lines
5.3 KiB
Go
// Copyright 2013 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package listener
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import (
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"bufio"
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"io"
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"net"
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"os"
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"strings"
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"github.com/go-kit/log"
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"github.com/go-kit/log/level"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/statsd_exporter/pkg/event"
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)
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type Parser interface {
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LineToEvents(line string, sampleErrors prometheus.CounterVec, samplesReceived prometheus.Counter, tagErrors prometheus.Counter, tagsReceived prometheus.Counter, logger log.Logger) event.Events
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}
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type StatsDUDPListener struct {
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Conn *net.UDPConn
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EventHandler event.EventHandler
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Logger log.Logger
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LineParser Parser
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UDPPackets prometheus.Counter
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LinesReceived prometheus.Counter
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EventsFlushed prometheus.Counter
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SampleErrors prometheus.CounterVec
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SamplesReceived prometheus.Counter
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TagErrors prometheus.Counter
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TagsReceived prometheus.Counter
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}
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func (l *StatsDUDPListener) SetEventHandler(eh event.EventHandler) {
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l.EventHandler = eh
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}
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func (l *StatsDUDPListener) Listen() {
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buf := make([]byte, 65535)
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for {
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n, _, err := l.Conn.ReadFromUDP(buf)
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if err != nil {
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// https://github.com/golang/go/issues/4373
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// ignore net: errClosing error as it will occur during shutdown
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if strings.HasSuffix(err.Error(), "use of closed network connection") {
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return
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}
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level.Error(l.Logger).Log("error", err)
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return
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}
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l.HandlePacket(buf[0:n])
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}
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}
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func (l *StatsDUDPListener) HandlePacket(packet []byte) {
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l.UDPPackets.Inc()
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lines := strings.Split(string(packet), "\n")
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for _, line := range lines {
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level.Debug(l.Logger).Log("msg", "Incoming line", "proto", "udp", "line", line)
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l.LinesReceived.Inc()
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l.EventHandler.Queue(l.LineParser.LineToEvents(line, l.SampleErrors, l.SamplesReceived, l.TagErrors, l.TagsReceived, l.Logger))
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}
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}
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type StatsDTCPListener struct {
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Conn *net.TCPListener
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EventHandler event.EventHandler
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Logger log.Logger
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LineParser Parser
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LinesReceived prometheus.Counter
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EventsFlushed prometheus.Counter
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SampleErrors prometheus.CounterVec
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SamplesReceived prometheus.Counter
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TagErrors prometheus.Counter
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TagsReceived prometheus.Counter
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TCPConnections prometheus.Counter
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TCPErrors prometheus.Counter
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TCPLineTooLong prometheus.Counter
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}
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func (l *StatsDTCPListener) SetEventHandler(eh event.EventHandler) {
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l.EventHandler = eh
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}
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func (l *StatsDTCPListener) Listen() {
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for {
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c, err := l.Conn.AcceptTCP()
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if err != nil {
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// https://github.com/golang/go/issues/4373
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// ignore net: errClosing error as it will occur during shutdown
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if strings.HasSuffix(err.Error(), "use of closed network connection") {
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return
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}
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level.Error(l.Logger).Log("msg", "AcceptTCP failed", "error", err)
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os.Exit(1)
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}
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go l.HandleConn(c)
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}
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}
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func (l *StatsDTCPListener) HandleConn(c *net.TCPConn) {
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defer c.Close()
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l.TCPConnections.Inc()
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r := bufio.NewReader(c)
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for {
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line, isPrefix, err := r.ReadLine()
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if err != nil {
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if err != io.EOF {
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l.TCPErrors.Inc()
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level.Debug(l.Logger).Log("msg", "Read failed", "addr", c.RemoteAddr(), "error", err)
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}
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break
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}
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level.Debug(l.Logger).Log("msg", "Incoming line", "proto", "tcp", "line", line)
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if isPrefix {
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l.TCPLineTooLong.Inc()
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level.Debug(l.Logger).Log("msg", "Read failed: line too long", "addr", c.RemoteAddr())
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break
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}
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l.LinesReceived.Inc()
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l.EventHandler.Queue(l.LineParser.LineToEvents(string(line), l.SampleErrors, l.SamplesReceived, l.TagErrors, l.TagsReceived, l.Logger))
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}
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}
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type StatsDUnixgramListener struct {
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Conn *net.UnixConn
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EventHandler event.EventHandler
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Logger log.Logger
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LineParser Parser
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UnixgramPackets prometheus.Counter
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LinesReceived prometheus.Counter
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EventsFlushed prometheus.Counter
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SampleErrors prometheus.CounterVec
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SamplesReceived prometheus.Counter
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TagErrors prometheus.Counter
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TagsReceived prometheus.Counter
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}
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func (l *StatsDUnixgramListener) SetEventHandler(eh event.EventHandler) {
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l.EventHandler = eh
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}
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func (l *StatsDUnixgramListener) Listen() {
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buf := make([]byte, 65535)
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for {
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n, _, err := l.Conn.ReadFromUnix(buf)
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if err != nil {
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// https://github.com/golang/go/issues/4373
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// ignore net: errClosing error as it will occur during shutdown
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if strings.HasSuffix(err.Error(), "use of closed network connection") {
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return
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}
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level.Error(l.Logger).Log(err)
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os.Exit(1)
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}
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l.HandlePacket(buf[:n])
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}
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}
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func (l *StatsDUnixgramListener) HandlePacket(packet []byte) {
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l.UnixgramPackets.Inc()
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lines := strings.Split(string(packet), "\n")
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for _, line := range lines {
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level.Debug(l.Logger).Log("msg", "Incoming line", "proto", "unixgram", "line", line)
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l.LinesReceived.Inc()
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l.EventHandler.Queue(l.LineParser.LineToEvents(line, l.SampleErrors, l.SamplesReceived, l.TagErrors, l.TagsReceived, l.Logger))
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}
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}
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