1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
package proxy
import (
"sync"
"github.com/miekg/coredns/middleware"
"github.com/prometheus/client_golang/prometheus"
)
// Metrics the proxy middleware exports.
var (
RequestDuration = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: middleware.Namespace,
Subsystem: subsystem,
Name: "request_duration_milliseconds",
Buckets: append(prometheus.DefBuckets, []float64{50, 100, 200, 500, 1000, 2000, 3000, 4000, 5000, 10000}...),
Help: "Histogram of the time (in milliseconds) each request took.",
}, []string{"zone"})
)
// OnStartup sets up the metrics on startup.
func OnStartup() error {
metricsOnce.Do(func() {
prometheus.MustRegister(RequestDuration)
})
return nil
}
var metricsOnce sync.Once
const subsystem = "proxy"
|
