Add crawler_duration gauge and server_queries counter

internal/crawl_task.go

@@ -52,6 +52,8 @@ func (t *CrawlTask) Run() error {
 		t.SetData("eid_time", eTime.String())
 		t.SetData("duration", fmt.Sprintf("%0.2f", eTime.Sub(sTime).Seconds()))
 
+		metrics.Gauge("crawler", "duration").Set(float64(eTime.Sub(sTime).Seconds()))
+
 		t.Done()
 	}()
 

internal/handlers.go

@@ -231,6 +231,8 @@ func (s *Server) SearchHandler() httprouter.Handle {
 		ctx.Results = results
 		ctx.SearchTook = searchResults.Took.Truncate(time.Nanosecond)
 
+		metrics.Counter("server", "queries").Inc()
+
 		s.render("search", w, ctx)
 	}
 }

internal/server.go

@@ -212,6 +212,10 @@ func (s *Server) setupMetrics() {
 		"crawler", "scraped",
 		"Number of links scraped by the crawler",
 	)
+	metrics.NewGauge(
+		"crawler", "duration",
+		"Duration of crawler tasks",
+	)
 
 	// server info
 	metrics.NewGaugeVec(
@@ -225,6 +229,10 @@ func (s *Server) setupMetrics() {
 			"version":      spyda.Version,
 			"commit":       spyda.Commit,
 		}).Set(1)
+	metrics.NewCounter(
+		"server", "queries",
+		"Number of queries processed",
+	)
 
 	s.AddRoute("GET", "/metrics", metrics.Handler())
 }