7c6ba3fcbd
Add Counter metrics and fix duration to use upstream name (and only use it when we have one). Fix the documentation to reflect this. Fixes #1134
49 lines
1.4 KiB
Go
49 lines
1.4 KiB
Go
package proxy
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import (
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"sync"
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"github.com/coredns/coredns/plugin"
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"github.com/prometheus/client_golang/prometheus"
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)
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// Metrics the proxy plugin exports.
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var (
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RequestCount = prometheus.NewCounterVec(prometheus.CounterOpts{
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Namespace: plugin.Namespace,
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Subsystem: "proxy",
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Name: "request_count_total",
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Help: "Counter of requests made per protocol, proxy protocol, family and upstream.",
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}, []string{"proto", "proxy_proto", "family", "to"})
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RequestDuration = prometheus.NewHistogramVec(prometheus.HistogramOpts{
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Namespace: plugin.Namespace,
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Subsystem: "proxy",
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Name: "request_duration_milliseconds",
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Buckets: append(prometheus.DefBuckets, []float64{15, 20, 25, 30, 40, 50, 100, 200, 500, 1000, 2000, 3000, 4000, 5000, 10000}...),
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Help: "Histogram of the time (in milliseconds) each request took.",
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}, []string{"proto", "proxy_proto", "family", "to"})
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)
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// OnStartupMetrics sets up the metrics on startup. This is done for all proxy protocols.
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func OnStartupMetrics() error {
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metricsOnce.Do(func() {
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prometheus.MustRegister(RequestCount)
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prometheus.MustRegister(RequestDuration)
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})
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return nil
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}
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// familyToString returns the string form of either 1, or 2. Returns
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// empty string is not a known family
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func familyToString(f int) string {
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if f == 1 {
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return "1"
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}
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if f == 2 {
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return "2"
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}
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return ""
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}
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var metricsOnce sync.Once
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