golint

middleware/metrics/handler.go

@@ -30,4 +30,5 @@ func (m *Metrics) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg
 	return status, err
 }
 
+// Name implements the Handler interface.
 func (m *Metrics) Name() string { return "prometheus" }

middleware/metrics/setup.go

@@ -87,4 +87,5 @@ func prometheusParse(c *caddy.Controller) (*Metrics, error) {
 
 var metricsOnce sync.Once
 
+// Addr is the address the where the metrics are exported by default.
 const Addr = "localhost:9153"

middleware/metrics/vars/vars.go

@@ -6,6 +6,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+// Request* and Reponse* are the prometheus counters and gauges we are using for exporting metrics.
 var (
 	RequestCount = prometheus.NewCounterVec(prometheus.CounterOpts{
 		Namespace: middleware.Namespace,