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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| "net/http" | ||
|
|
||
| "github.com/dragonflyoss/Dragonfly/supernode/config" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/client_golang/prometheus/promauto" | ||
| "github.com/prometheus/client_golang/prometheus/promhttp" | ||
| ) | ||
|
|
||
| // metrics defines three prometheus metrics for monitoring http handler status | ||
| type metrics struct { | ||
| requestCounter *prometheus.CounterVec | ||
| requestDuration *prometheus.HistogramVec | ||
| responseSize *prometheus.HistogramVec | ||
| } | ||
|
|
||
| func newMetrics() *metrics { | ||
| m := &metrics{ | ||
| requestCounter: promauto.NewCounterVec( | ||
| prometheus.CounterOpts{ | ||
| Namespace: config.Namespace, | ||
| Subsystem: config.Subsystem, | ||
| Name: "http_requests_total", | ||
| Help: "Counter of HTTP requests.", | ||
| }, | ||
| []string{"handler", "code"}, | ||
| ), | ||
| requestDuration: promauto.NewHistogramVec( | ||
| prometheus.HistogramOpts{ | ||
| Namespace: config.Namespace, | ||
| Subsystem: config.Subsystem, | ||
| Name: "http_request_duration_seconds", | ||
| Help: "Histogram of latencies for HTTP requests.", | ||
| Buckets: []float64{.1, .2, .4, 1, 3, 8, 20, 60, 120}, | ||
| }, | ||
| []string{"handler"}, | ||
| ), | ||
| responseSize: promauto.NewHistogramVec( | ||
| prometheus.HistogramOpts{ | ||
| Namespace: config.Namespace, | ||
| Subsystem: config.Subsystem, | ||
| Name: "http_response_size_bytes", | ||
| Help: "Histogram of response size for HTTP requests.", | ||
| Buckets: prometheus.ExponentialBuckets(100, 10, 8), | ||
| }, | ||
| []string{"handler"}, | ||
| ), | ||
| } | ||
|
|
||
| return m | ||
| } | ||
|
|
||
| // instrumentHandler will update metrics for every http request | ||
| func (m *metrics) instrumentHandler(handlerName string, handler http.HandlerFunc) http.HandlerFunc { | ||
| return promhttp.InstrumentHandlerCounter( | ||
| m.requestCounter.MustCurryWith(prometheus.Labels{"handler": handlerName}), | ||
| promhttp.InstrumentHandlerDuration( | ||
| m.requestDuration.MustCurryWith(prometheus.Labels{"handler": handlerName}), | ||
| promhttp.InstrumentHandlerResponseSize( | ||
| m.responseSize.MustCurryWith(prometheus.Labels{"handler": handlerName}), | ||
| handler, | ||
| ), | ||
| ), | ||
| ) | ||
| } |
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