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metrics.go
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/
metrics.go
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package lib
import (
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/client_golang/prometheus/promhttp"
"net/http"
)
var (
ErrorCounter = promauto.NewCounter(prometheus.CounterOpts{
Name: "nirn_proxy_error",
Help: "The total number of errors when processing requests",
})
RequestHistogram = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Name: "nirn_proxy_requests",
Help: "Request histogram",
Buckets: []float64{.1, .25, 1, 2.5, 5, 20},
}, []string{"method", "status", "route", "clientId"})
ConnectionsOpen = promauto.NewGauge(prometheus.GaugeOpts{
Name: "nirn_proxy_open_connections",
Help: "Gauge for client connections currently open with the proxy",
})
)
func StartMetrics(addr string) {
prometheus.MustRegister(RequestHistogram)
http.Handle("/metrics", promhttp.Handler())
logger.Info("Starting metrics server on " + addr)
err := http.ListenAndServe(addr, nil)
if err != nil {
logger.Error(err)
return
}
}