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109 lines
3.4 KiB
Go
109 lines
3.4 KiB
Go
// Copyright 2016 Michal Witkowski. All Rights Reserved.
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// See LICENSE for licensing terms.
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package conntrack
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import (
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"context"
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"net"
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"os"
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"syscall"
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prom "github.com/prometheus/client_golang/prometheus"
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)
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type failureReason string
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const (
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failedResolution = "resolution"
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failedConnRefused = "refused"
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failedTimeout = "timeout"
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failedUnknown = "unknown"
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)
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var (
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dialerAttemptedTotal = prom.NewCounterVec(
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prom.CounterOpts{
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Namespace: "net",
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Subsystem: "conntrack",
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Name: "dialer_conn_attempted_total",
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Help: "Total number of connections attempted by the given dialer a given name.",
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}, []string{"dialer_name"})
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dialerConnEstablishedTotal = prom.NewCounterVec(
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prom.CounterOpts{
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Namespace: "net",
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Subsystem: "conntrack",
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Name: "dialer_conn_established_total",
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Help: "Total number of connections successfully established by the given dialer a given name.",
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}, []string{"dialer_name"})
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dialerConnFailedTotal = prom.NewCounterVec(
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prom.CounterOpts{
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Namespace: "net",
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Subsystem: "conntrack",
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Name: "dialer_conn_failed_total",
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Help: "Total number of connections failed to dial by the dialer a given name.",
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}, []string{"dialer_name", "reason"})
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dialerConnClosedTotal = prom.NewCounterVec(
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prom.CounterOpts{
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Namespace: "net",
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Subsystem: "conntrack",
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Name: "dialer_conn_closed_total",
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Help: "Total number of connections closed which originated from the dialer of a given name.",
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}, []string{"dialer_name"})
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)
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func init() {
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prom.MustRegister(dialerAttemptedTotal)
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prom.MustRegister(dialerConnEstablishedTotal)
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prom.MustRegister(dialerConnFailedTotal)
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prom.MustRegister(dialerConnClosedTotal)
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}
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// preRegisterDialerMetrics pre-populates Prometheus labels for the given dialer name, to avoid Prometheus missing labels issue.
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func PreRegisterDialerMetrics(dialerName string) {
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dialerAttemptedTotal.WithLabelValues(dialerName)
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dialerConnEstablishedTotal.WithLabelValues(dialerName)
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for _, reason := range []failureReason{failedTimeout, failedResolution, failedConnRefused, failedUnknown} {
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dialerConnFailedTotal.WithLabelValues(dialerName, string(reason))
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}
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dialerConnClosedTotal.WithLabelValues(dialerName)
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}
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func reportDialerConnAttempt(dialerName string) {
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dialerAttemptedTotal.WithLabelValues(dialerName).Inc()
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}
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func reportDialerConnEstablished(dialerName string) {
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dialerConnEstablishedTotal.WithLabelValues(dialerName).Inc()
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}
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func reportDialerConnClosed(dialerName string) {
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dialerConnClosedTotal.WithLabelValues(dialerName).Inc()
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}
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func reportDialerConnFailed(dialerName string, err error) {
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if netErr, ok := err.(*net.OpError); ok {
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switch nestErr := netErr.Err.(type) {
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case *net.DNSError:
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dialerConnFailedTotal.WithLabelValues(dialerName, string(failedResolution)).Inc()
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return
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case *os.SyscallError:
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if nestErr.Err == syscall.ECONNREFUSED {
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dialerConnFailedTotal.WithLabelValues(dialerName, string(failedConnRefused)).Inc()
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}
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dialerConnFailedTotal.WithLabelValues(dialerName, string(failedUnknown)).Inc()
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return
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}
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if netErr.Timeout() {
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dialerConnFailedTotal.WithLabelValues(dialerName, string(failedTimeout)).Inc()
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}
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} else if err == context.Canceled || err == context.DeadlineExceeded {
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dialerConnFailedTotal.WithLabelValues(dialerName, string(failedTimeout)).Inc()
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return
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}
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dialerConnFailedTotal.WithLabelValues(dialerName, string(failedUnknown)).Inc()
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}
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