add guage metrics for go routines in reflector package

internal/metrics/metrics.go

@@ -219,6 +219,11 @@ var (
 		Name:      "http3_blob_request_queue_size",
 		Help:      "Blob requests of https queue size",
 	})
+	RoutinesQueue = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: ns,
+		Name:      "routines",
+		Help:      "routines running by type",
+	}, []string{"package", "kind"})
 )
 
 func CacheLabels(name, component string) prometheus.Labels {

reflector/blocklist.go

@@ -8,6 +8,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/lbryio/reflector.go/internal/metrics"
+
 	"github.com/lbryio/reflector.go/store"
 	"github.com/lbryio/reflector.go/wallet"
 
@@ -109,8 +111,9 @@ func sdHashesForOutpoints(walletServers, outpoints []string, stopper stop.Chan)
 	}
 
 	done := make(chan bool)
-
+	metrics.RoutinesQueue.WithLabelValues("reflector", "sdhashesforoutput").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "sdhashesforoutput").Dec()
 		select {
 		case <-done:
 		case <-stopper:

reflector/server.go

@@ -74,7 +74,9 @@ func (s *Server) Start(address string) error {
 		log.Fatal(err)
 	}
 	s.grp.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "listener").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "listener").Dec()
 		<-s.grp.Ch()
 		err := l.Close()
 		if err != nil {
@@ -84,7 +86,9 @@ func (s *Server) Start(address string) error {
 	}()
 
 	s.grp.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "start").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "start").Dec()
 		s.listenAndServe(l)
 		s.grp.Done()
 	}()
@@ -92,7 +96,9 @@ func (s *Server) Start(address string) error {
 	if s.EnableBlocklist {
 		if b, ok := s.underlyingStore.(store.Blocklister); ok {
 			s.grp.Add(1)
+			metrics.RoutinesQueue.WithLabelValues("reflector", "enableblocklist").Inc()
 			go func() {
+				defer metrics.RoutinesQueue.WithLabelValues("reflector", "enableblocklist").Dec()
 				s.enableBlocklist(b)
 				s.grp.Done()
 			}()
@@ -115,7 +121,9 @@ func (s *Server) listenAndServe(listener net.Listener) {
 			log.Error(err)
 		} else {
 			s.grp.Add(1)
+			metrics.RoutinesQueue.WithLabelValues("reflector", "server-listenandserve").Inc()
 			go func() {
+				defer metrics.RoutinesQueue.WithLabelValues("reflector", "server-listenandserve").Inc()
 				s.handleConn(conn)
 				s.grp.Done()
 			}()
@@ -130,7 +138,9 @@ func (s *Server) handleConn(conn net.Conn) {
 		close(connNeedsClosing)
 	}()
 	s.grp.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "server-handleconn").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "server-handleconn").Dec()
 		defer s.grp.Done()
 		select {
 		case <-connNeedsClosing:

reflector/uploader.go

@@ -7,6 +7,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/lbryio/reflector.go/internal/metrics"
+
 	"github.com/lbryio/reflector.go/db"
 	"github.com/lbryio/reflector.go/store"
 
@@ -88,7 +90,9 @@ func (u *Uploader) Upload(dirOrFilePath string) error {
 
 	for i := 0; i < u.workers; i++ {
 		workerWG.Add(1)
+		metrics.RoutinesQueue.WithLabelValues("reflector", "upload").Inc()
 		go func(i int) {
+			defer metrics.RoutinesQueue.WithLabelValues("reflector", "upload").Dec()
 			defer workerWG.Done()
 			defer func(i int) { log.Debugf("worker %d quitting", i) }(i)
 			u.worker(pathChan)
@@ -97,7 +101,9 @@ func (u *Uploader) Upload(dirOrFilePath string) error {
 
 	countWG := sync.WaitGroup{}
 	countWG.Add(1)
+	metrics.RoutinesQueue.WithLabelValues("reflector", "uploader").Inc()
 	go func() {
+		defer metrics.RoutinesQueue.WithLabelValues("reflector", "uploader").Dec()
 		defer countWG.Done()
 		u.counter()
 	}()