90dd4bbd45
After initial startup, see if prometheus is loaded and if so, register our metrics with it. Stop doing the init() func and just use the sync.Once so we don't double registrer our metrics.
40 lines
1 KiB
Go
40 lines
1 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_seconds",
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Buckets: plugin.TimeBuckets,
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Help: "Histogram of the time (in seconds) each request took.",
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}, []string{"proto", "proxy_proto", "family", "to"})
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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 once sync.Once
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