add HealthEndpoints map as public

add public HealthEndpoints for set custom Health urls

Author: sergeylanzman

plugin/ochttp/trace.go

@@ -28,6 +28,16 @@ import (
 
 var defaultFormat propagation.HTTPFormat = &b3.HTTPFormat{}
 
+
+// Health checking is pretty frequent and
+// traces collected for health endpoints
+// can be extremely noisy and expensive.
+// Disable canonical health checking endpoints
+// like /healthz and /_ah/health for now.
+var HealthEndpoints = map[string]bool{
+	"/healthz":    true,
+	"/_ah/health": true,
+}
 // Attributes recorded on the span for the requests.
 // Only trace exporters will need them.
 const (
@@ -206,12 +216,7 @@ var codeToStr = map[int32]string{
 }
 
 func isHealthEndpoint(path string) bool {
-	// Health checking is pretty frequent and
-	// traces collected for health endpoints
-	// can be extremely noisy and expensive.
-	// Disable canonical health checking endpoints
-	// like /healthz and /_ah/health for now.
-	if path == "/healthz" || path == "/_ah/health" {
+	if _, exist := HealthEndpoints[path]; exist {
 		return true
 	}
 	return false