feat: crl support, metrics

internal/metrics/metrics.go

@@ -0,0 +1,34 @@
+package metrics
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+const (
+	labelPath   = "path"
+	labelStatus = "status"
+)
+
+var (
+	totalRequests = prometheus.NewCounterVec(prometheus.CounterOpts{
+		Name: "http_requests_total",
+		Help: "Number of get requests.",
+	}, []string{labelPath})
+
+	responseStatus = prometheus.NewCounterVec(prometheus.CounterOpts{
+		Name: "response_status",
+		Help: "Status of HTTP response",
+	}, []string{labelPath, labelStatus})
+
+	httpDuration = prometheus.NewHistogramVec(prometheus.HistogramOpts{
+		Name:    "http_response_time_seconds",
+		Help:    "Duration of HTTP requests.",
+		Buckets: prometheus.DefBuckets,
+	}, []string{labelPath})
+)
+
+func init() {
+	prometheus.MustRegister(totalRequests)
+	prometheus.MustRegister(responseStatus)
+	prometheus.MustRegister(httpDuration)
+}