forked from mirrors/statsd_exporter
a455a8ad64
Signed-off-by: Frank Davidson <davidfr@americas.manulife.net> Signed-off-by: Frank Davidson <ffdavidson@gmail.com>
139 lines
5.3 KiB
Go
139 lines
5.3 KiB
Go
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/kit/log"
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"github.com/go-kit/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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pkgLine "github.com/prometheus/statsd_exporter/pkg/line"
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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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}
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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(udpPackets prometheus.Counter, linesReceived prometheus.Counter, eventsFlushed prometheus.Counter, sampleErrors prometheus.CounterVec, samplesReceived prometheus.Counter, tagErrors prometheus.Counter, tagsReceived prometheus.Counter) {
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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], udpPackets, linesReceived, eventsFlushed, sampleErrors, samplesReceived, tagErrors, tagsReceived)
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}
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}
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func (l *StatsDUDPListener) handlePacket(packet []byte, udpPackets prometheus.Counter, linesReceived prometheus.Counter, eventsFlushed prometheus.Counter, sampleErrors prometheus.CounterVec, samplesReceived prometheus.Counter, tagErrors prometheus.Counter, tagsReceived prometheus.Counter) {
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udpPackets.Inc()
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lines := strings.Split(string(packet), "\n")
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for _, line := range lines {
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linesReceived.Inc()
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l.EventHandler.Queue(pkgLine.LineToEvents(line, sampleErrors, samplesReceived, tagErrors, tagsReceived, l.Logger), &eventsFlushed)
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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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}
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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(linesReceived prometheus.Counter, eventsFlushed prometheus.Counter, tcpConnections prometheus.Counter, tcpErrors prometheus.Counter, tcpLineTooLong prometheus.Counter, sampleErrors prometheus.CounterVec, samplesReceived prometheus.Counter, tagErrors prometheus.Counter, tagsReceived prometheus.Counter) {
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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, linesReceived, eventsFlushed, tcpConnections, tcpErrors, tcpLineTooLong, sampleErrors, samplesReceived, tagErrors, tagsReceived)
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}
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}
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func (l *StatsDTCPListener) handleConn(c *net.TCPConn, linesReceived prometheus.Counter, eventsFlushed prometheus.Counter, tcpConnections prometheus.Counter, tcpErrors prometheus.Counter, tcpLineTooLong prometheus.Counter, sampleErrors prometheus.CounterVec, samplesReceived prometheus.Counter, tagErrors prometheus.Counter, tagsReceived prometheus.Counter) {
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defer c.Close()
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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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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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if isPrefix {
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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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linesReceived.Inc()
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l.EventHandler.Queue(pkgLine.LineToEvents(string(line), sampleErrors, samplesReceived, tagErrors, tagsReceived, l.Logger), &eventsFlushed)
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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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}
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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(unixgramPackets prometheus.Counter, linesReceived prometheus.Counter, eventsFlushed prometheus.Counter, sampleErrors prometheus.CounterVec, samplesReceived prometheus.Counter, tagErrors prometheus.Counter, tagsReceived prometheus.Counter) {
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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], unixgramPackets, linesReceived, eventsFlushed, sampleErrors, samplesReceived, tagErrors, tagsReceived)
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}
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}
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func (l *StatsDUnixgramListener) handlePacket(packet []byte, unixgramPackets prometheus.Counter, linesReceived prometheus.Counter, eventsFlushed prometheus.Counter, sampleErrors prometheus.CounterVec, samplesReceived prometheus.Counter, tagErrors prometheus.Counter, tagsReceived prometheus.Counter) {
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unixgramPackets.Inc()
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lines := strings.Split(string(packet), "\n")
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for _, line := range lines {
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linesReceived.Inc()
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l.EventHandler.Queue(pkgLine.LineToEvents(line, sampleErrors, samplesReceived, tagErrors, tagsReceived, l.Logger), &eventsFlushed)
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}
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}
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