add ability to skip endpoints for tracer and meter

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

meter/meter.go

@@ -24,6 +24,13 @@ var (
 	DefaultSummaryQuantiles = []float64{0.5, 0.9, 0.97, 0.99, 1}
 	// DefaultSummaryWindow is the default window for summary
 	DefaultSummaryWindow = 5 * time.Minute
+	// DefaultSkipEndpoints is the slice of endpoint that must not be metered
+	DefaultSkipEndpoints = []string{
+		"MeterService.Metrics",
+		"HealthService.Live",
+		"HealthService.Ready",
+		"HealthService.Version",
+	}
 )
 
 // Meter is an interface for collecting and instrumenting metrics

tracer/tracer.go

@@ -7,14 +7,20 @@ import (
 	"go.unistack.org/micro/v3/logger"
 )
 
-// DefaultTracer is the global default tracer
-var DefaultTracer Tracer = NewTracer()
-
 var (
+	// DefaultTracer is the global default tracer
+	DefaultTracer Tracer = NewTracer() //nolint:revive
 	// TraceIDKey is the key used for the trace id in the log call
 	TraceIDKey = "trace-id"
 	// SpanIDKey is the key used for the span id in the log call
 	SpanIDKey = "span-id"
+	// DefaultSkipEndpoints is the slice of endpoint that must not be traced
+	DefaultSkipEndpoints = []string{
+		"MeterService.Metrics",
+		"HealthService.Live",
+		"HealthService.Ready",
+		"HealthService.Version",
+	}
 )
 
 func init() {