feat: new openid connect authentication layer

internal/proxy/director/layer/authn/oidc/metrics.go

@@ -0,0 +1,39 @@
+package oidc
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+const (
+	metricNamespace  = "bouncer_layer_authn_oidc"
+	metricLabelProxy = "proxy"
+	metricLabelLayer = "layer"
+)
+
+var (
+	metricLoginRequestsTotal = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name:      "login_requests_total",
+			Help:      "Bouncer's authn-oidc layer total login requests",
+			Namespace: metricNamespace,
+		},
+		[]string{metricLabelProxy, metricLabelLayer},
+	)
+	metricLoginSuccessesTotal = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name:      "login_successes_total",
+			Help:      "Bouncer's authn-oidc layer total login successes",
+			Namespace: metricNamespace,
+		},
+		[]string{metricLabelProxy, metricLabelLayer},
+	)
+	metricLogoutsTotal = promauto.NewCounterVec(
+		prometheus.CounterOpts{
+			Name:      "logout_total",
+			Help:      "Bouncer's authn-oidc layer total logouts",
+			Namespace: metricNamespace,
+		},
+		[]string{metricLabelProxy, metricLabelLayer},
+	)
+)