Observability upgrade (#3146)

* feat(metrics): grand update

* feat(metrics): fixed missing part in ee tracer

* feat(assets): added missing arg

* feat(metrics): fixed naming problems

backend/cmd/analytics/main.go

@@ -8,8 +8,7 @@ import (
 	"openreplay/backend/pkg/db/postgres/pool"
 	"openreplay/backend/pkg/logger"
 	"openreplay/backend/pkg/metrics"
-	analyticsMetrics "openreplay/backend/pkg/metrics/analytics"
-	databaseMetrics "openreplay/backend/pkg/metrics/database"
+	"openreplay/backend/pkg/metrics/database"
 	"openreplay/backend/pkg/metrics/web"
 	"openreplay/backend/pkg/server"
 	"openreplay/backend/pkg/server/api"
@@ -19,16 +18,18 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := analyticsConfig.New(log)
+	// Observability
 	webMetrics := web.New("analytics")
-	metrics.New(log, append(webMetrics.List(), append(analyticsMetrics.List(), databaseMetrics.List()...)...))
+	dbMetrics := database.New("analytics")
+	metrics.New(log, append(webMetrics.List(), dbMetrics.List()...))
 
-	pgConn, err := pool.New(cfg.Postgres.String())
+	pgConn, err := pool.New(dbMetrics, cfg.Postgres.String())
 	if err != nil {
 		log.Fatal(ctx, "can't init postgres connection: %s", err)
 	}
 	defer pgConn.Close()
 
-	builder, err := analytics.NewServiceBuilder(log, cfg, webMetrics, pgConn)
+	builder, err := analytics.NewServiceBuilder(log, cfg, webMetrics, dbMetrics, pgConn)
 	if err != nil {
 		log.Fatal(ctx, "can't init services: %s", err)
 	}

backend/cmd/assets/main.go

@@ -22,13 +22,15 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := config.New(log)
-	metrics.New(log, assetsMetrics.List())
+	// Observability
+	assetMetrics := assetsMetrics.New("assets")
+	metrics.New(log, assetMetrics.List())
 
 	objStore, err := store.NewStore(&cfg.ObjectsConfig)
 	if err != nil {
 		log.Fatal(ctx, "can't init object storage: %s", err)
 	}
-	cacher, err := cacher.NewCacher(cfg, objStore)
+	cacher, err := cacher.NewCacher(cfg, objStore, assetMetrics)
 	if err != nil {
 		log.Fatal(ctx, "can't init cacher: %s", err)
 	}
@@ -37,7 +39,7 @@ func main() {
 		switch m := msg.(type) {
 		case *messages.AssetCache:
 			cacher.CacheURL(m.SessionID(), m.URL)
-			assetsMetrics.IncreaseProcessesSessions()
+			assetMetrics.IncreaseProcessesSessions()
 		case *messages.JSException:
 			sourceList, err := assets.ExtractJSExceptionSources(&m.Payload)
 			if err != nil {

backend/cmd/canvases/main.go

@@ -22,6 +22,7 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := config.New(log)
+	// Observability
 	canvasMetrics := canvasesMetrics.New("canvases")
 	metrics.New(log, canvasMetrics.List())
 

backend/cmd/db/main.go

@@ -14,7 +14,7 @@ import (
 	"openreplay/backend/pkg/memory"
 	"openreplay/backend/pkg/messages"
 	"openreplay/backend/pkg/metrics"
-	databaseMetrics "openreplay/backend/pkg/metrics/database"
+	"openreplay/backend/pkg/metrics/database"
 	"openreplay/backend/pkg/projects"
 	"openreplay/backend/pkg/queue"
 	"openreplay/backend/pkg/sessions"
@@ -26,22 +26,24 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := config.New(log)
-	metrics.New(log, databaseMetrics.List())
+	// Observability
+	dbMetric := database.New("db")
+	metrics.New(log, dbMetric.List())
 
-	pgConn, err := pool.New(cfg.Postgres.String())
+	pgConn, err := pool.New(dbMetric, cfg.Postgres.String())
 	if err != nil {
 		log.Fatal(ctx, "can't init postgres connection: %s", err)
 	}
 	defer pgConn.Close()
 
-	chConn := clickhouse.NewConnector(cfg.Clickhouse)
+	chConn := clickhouse.NewConnector(cfg.Clickhouse, dbMetric)
 	if err := chConn.Prepare(); err != nil {
 		log.Fatal(ctx, "can't prepare clickhouse: %s", err)
 	}
 	defer chConn.Stop()
 
 	// Init db proxy module (postgres + clickhouse + batches)
-	dbProxy := postgres.NewConn(log, pgConn, chConn)
+	dbProxy := postgres.NewConn(log, pgConn, chConn, dbMetric)
 	defer dbProxy.Close()
 
 	// Init redis connection
@@ -51,8 +53,8 @@ func main() {
 	}
 	defer redisClient.Close()
 
-	projManager := projects.New(log, pgConn, redisClient)
-	sessManager := sessions.New(log, pgConn, projManager, redisClient)
+	projManager := projects.New(log, pgConn, redisClient, dbMetric)
+	sessManager := sessions.New(log, pgConn, projManager, redisClient, dbMetric)
 	tagsManager := tags.New(log, pgConn)
 
 	// Init data saver

backend/cmd/ender/main.go

@@ -19,7 +19,7 @@ import (
 	"openreplay/backend/pkg/memory"
 	"openreplay/backend/pkg/messages"
 	"openreplay/backend/pkg/metrics"
-	databaseMetrics "openreplay/backend/pkg/metrics/database"
+	"openreplay/backend/pkg/metrics/database"
 	enderMetrics "openreplay/backend/pkg/metrics/ender"
 	"openreplay/backend/pkg/projects"
 	"openreplay/backend/pkg/queue"
@@ -31,9 +31,12 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := ender.New(log)
-	metrics.New(log, append(enderMetrics.List(), databaseMetrics.List()...))
+	// Observability
+	dbMetric := database.New("ender")
+	enderMetric := enderMetrics.New("ender")
+	metrics.New(log, append(enderMetric.List(), dbMetric.List()...))
 
-	pgConn, err := pool.New(cfg.Postgres.String())
+	pgConn, err := pool.New(dbMetric, cfg.Postgres.String())
 	if err != nil {
 		log.Fatal(ctx, "can't init postgres connection: %s", err)
 	}
@@ -45,10 +48,10 @@ func main() {
 	}
 	defer redisClient.Close()
 
-	projManager := projects.New(log, pgConn, redisClient)
-	sessManager := sessions.New(log, pgConn, projManager, redisClient)
+	projManager := projects.New(log, pgConn, redisClient, dbMetric)
+	sessManager := sessions.New(log, pgConn, projManager, redisClient, dbMetric)
 
-	sessionEndGenerator, err := sessionender.New(intervals.EVENTS_SESSION_END_TIMEOUT, cfg.PartitionsNumber)
+	sessionEndGenerator, err := sessionender.New(enderMetric, intervals.EVENTS_SESSION_END_TIMEOUT, cfg.PartitionsNumber)
 	if err != nil {
 		log.Fatal(ctx, "can't init ender service: %s", err)
 	}

backend/cmd/heuristics/main.go

@@ -23,7 +23,9 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := config.New(log)
-	metrics.New(log, heuristicsMetrics.List())
+	// Observability
+	heuristicsMetric := heuristicsMetrics.New("heuristics")
+	metrics.New(log, heuristicsMetric.List())
 
 	// HandlersFabric returns the list of message handlers we want to be applied to each incoming message.
 	handlersFabric := func() []handlers.MessageProcessor {
@@ -62,7 +64,7 @@ func main() {
 	}
 
 	// Run service and wait for TERM signal
-	service := heuristics.New(log, cfg, producer, consumer, eventBuilder, memoryManager)
+	service := heuristics.New(log, cfg, producer, consumer, eventBuilder, memoryManager, heuristicsMetric)
 	log.Info(ctx, "Heuristics service started")
 	terminator.Wait(log, service)
 }

backend/cmd/http/main.go

@@ -9,7 +9,7 @@ import (
 	"openreplay/backend/pkg/db/redis"
 	"openreplay/backend/pkg/logger"
 	"openreplay/backend/pkg/metrics"
-	databaseMetrics "openreplay/backend/pkg/metrics/database"
+	"openreplay/backend/pkg/metrics/database"
 	"openreplay/backend/pkg/metrics/web"
 	"openreplay/backend/pkg/queue"
 	"openreplay/backend/pkg/server"
@@ -20,13 +20,15 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := http.New(log)
+	// Observability
 	webMetrics := web.New("http")
-	metrics.New(log, append(webMetrics.List(), databaseMetrics.List()...))
+	dbMetric := database.New("http")
+	metrics.New(log, append(webMetrics.List(), dbMetric.List()...))
 
 	producer := queue.NewProducer(cfg.MessageSizeLimit, true)
 	defer producer.Close(15000)
 
-	pgConn, err := pool.New(cfg.Postgres.String())
+	pgConn, err := pool.New(dbMetric, cfg.Postgres.String())
 	if err != nil {
 		log.Fatal(ctx, "can't init postgres connection: %s", err)
 	}
@@ -38,7 +40,7 @@ func main() {
 	}
 	defer redisClient.Close()
 
-	builder, err := services.New(log, cfg, webMetrics, producer, pgConn, redisClient)
+	builder, err := services.New(log, cfg, webMetrics, dbMetric, producer, pgConn, redisClient)
 	if err != nil {
 		log.Fatal(ctx, "failed while creating services: %s", err)
 	}

backend/cmd/images/main.go

@@ -23,6 +23,7 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := config.New(log)
+	// Observability
 	imageMetrics := imagesMetrics.New("images")
 	metrics.New(log, imageMetrics.List())
 

backend/cmd/integrations/main.go

@@ -18,16 +18,18 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := config.New(log)
+	// Observability
 	webMetrics := web.New("integrations")
-	metrics.New(log, append(webMetrics.List(), database.List()...))
+	dbMetric := database.New("integrations")
+	metrics.New(log, append(webMetrics.List(), dbMetric.List()...))
 
-	pgConn, err := pool.New(cfg.Postgres.String())
+	pgConn, err := pool.New(dbMetric, cfg.Postgres.String())
 	if err != nil {
 		log.Fatal(ctx, "can't init postgres connection: %s", err)
 	}
 	defer pgConn.Close()
 
-	builder, err := integrations.NewServiceBuilder(log, cfg, webMetrics, pgConn)
+	builder, err := integrations.NewServiceBuilder(log, cfg, webMetrics, dbMetric, pgConn)
 	if err != nil {
 		log.Fatal(ctx, "can't init services: %s", err)
 	}

backend/cmd/sink/main.go

@@ -9,14 +9,14 @@ import (
 	"syscall"
 	"time"
 
-	"openreplay/backend/internal/config/sink"
+	config "openreplay/backend/internal/config/sink"
 	"openreplay/backend/internal/sink/assetscache"
 	"openreplay/backend/internal/sink/sessionwriter"
 	"openreplay/backend/internal/storage"
 	"openreplay/backend/pkg/logger"
 	"openreplay/backend/pkg/messages"
 	"openreplay/backend/pkg/metrics"
-	sinkMetrics "openreplay/backend/pkg/metrics/sink"
+	"openreplay/backend/pkg/metrics/sink"
 	"openreplay/backend/pkg/queue"
 	"openreplay/backend/pkg/url/assets"
 )
@@ -24,7 +24,9 @@ import (
 func main() {
 	ctx := context.Background()
 	log := logger.New()
-	cfg := sink.New(log)
+	cfg := config.New(log)
+	// Observability
+	sinkMetrics := sink.New("sink")
 	metrics.New(log, sinkMetrics.List())
 
 	if _, err := os.Stat(cfg.FsDir); os.IsNotExist(err) {
@@ -39,7 +41,7 @@ func main() {
 	if err != nil {
 		log.Fatal(ctx, "can't init rewriter: %s", err)
 	}
-	assetMessageHandler := assetscache.New(log, cfg, rewriter, producer)
+	assetMessageHandler := assetscache.New(log, cfg, rewriter, producer, sinkMetrics)
 	counter := storage.NewLogCounter()
 
 	var (
@@ -191,7 +193,7 @@ func main() {
 			cfg.TopicRawWeb,
 			cfg.TopicRawMobile,
 		},
-		messages.NewSinkMessageIterator(log, msgHandler, nil, false),
+		messages.NewSinkMessageIterator(log, msgHandler, nil, false, sinkMetrics),
 		false,
 		cfg.MessageSizeLimit,
 	)

backend/cmd/spot/main.go

@@ -19,17 +19,20 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := spotConfig.New(log)
+	// Observability
 	webMetrics := web.New("spot")
-	metrics.New(log, append(webMetrics.List(), append(spotMetrics.List(), databaseMetrics.List()...)...))
+	spotMetric := spotMetrics.New("spot")
+	dbMetric := databaseMetrics.New("spot")
+	metrics.New(log, append(webMetrics.List(), append(spotMetric.List(), dbMetric.List()...)...))
 
-	pgConn, err := pool.New(cfg.Postgres.String())
+	pgConn, err := pool.New(dbMetric, cfg.Postgres.String())
 	if err != nil {
 		log.Fatal(ctx, "can't init postgres connection: %s", err)
 	}
 	defer pgConn.Close()
 
 	prefix := api.NoPrefix
-	builder, err := spot.NewServiceBuilder(log, cfg, webMetrics, pgConn, prefix)
+	builder, err := spot.NewServiceBuilder(log, cfg, webMetrics, spotMetric, dbMetric, pgConn, prefix)
 	if err != nil {
 		log.Fatal(ctx, "can't init services: %s", err)
 	}

backend/cmd/storage/main.go

@@ -23,13 +23,15 @@ func main() {
 	ctx := context.Background()
 	log := logger.New()
 	cfg := config.New(log)
-	metrics.New(log, storageMetrics.List())
+	// Observability
+	storageMetric := storageMetrics.New("storage")
+	metrics.New(log, storageMetric.List())
 
 	objStore, err := store.NewStore(&cfg.ObjectsConfig)
 	if err != nil {
 		log.Fatal(ctx, "can't init object storage: %s", err)
 	}
-	srv, err := storage.New(cfg, log, objStore)
+	srv, err := storage.New(cfg, log, objStore, storageMetric)
 	if err != nil {
 		log.Fatal(ctx, "can't init storage service: %s", err)
 	}

backend/internal/assets/cacher/cacher.go

@@ -27,6 +27,7 @@ type cacher struct {
 	objStorage     objectstorage.ObjectStorage // AWS Docs: "These clients are safe to use concurrently."
 	httpClient     *http.Client                // Docs: "Clients are safe for concurrent use by multiple goroutines."
 	rewriter       *assets.Rewriter            // Read only
+	metrics        metrics.Assets
 	Errors         chan error
 	sizeLimit      int
 	requestHeaders map[string]string
@@ -37,7 +38,7 @@ func (c *cacher) CanCache() bool {
 	return c.workers.CanAddTask()
 }
 
-func NewCacher(cfg *config.Config, store objectstorage.ObjectStorage) (*cacher, error) {
+func NewCacher(cfg *config.Config, store objectstorage.ObjectStorage, metrics metrics.Assets) (*cacher, error) {
 	switch {
 	case cfg == nil:
 		return nil, errors.New("config is nil")
@@ -93,6 +94,7 @@ func NewCacher(cfg *config.Config, store objectstorage.ObjectStorage) (*cacher,
 		Errors:         make(chan error),
 		sizeLimit:      cfg.AssetsSizeLimit,
 		requestHeaders: cfg.AssetsRequestHeaders,
+		metrics:        metrics,
 	}
 	c.workers = NewPool(64, c.CacheFile)
 	return c, nil
@@ -115,7 +117,7 @@ func (c *cacher) cacheURL(t *Task) {
 		c.Errors <- errors.Wrap(err, t.urlContext)
 		return
 	}
-	metrics.RecordDownloadDuration(float64(time.Now().Sub(start).Milliseconds()), res.StatusCode)
+	c.metrics.RecordDownloadDuration(float64(time.Now().Sub(start).Milliseconds()), res.StatusCode)
 	defer res.Body.Close()
 	if res.StatusCode >= 400 {
 		printErr := true
@@ -162,12 +164,12 @@ func (c *cacher) cacheURL(t *Task) {
 	start = time.Now()
 	err = c.objStorage.Upload(strings.NewReader(strData), t.cachePath, contentType, contentEncoding, objectstorage.NoCompression)
 	if err != nil {
-		metrics.RecordUploadDuration(float64(time.Now().Sub(start).Milliseconds()), true)
+		c.metrics.RecordUploadDuration(float64(time.Now().Sub(start).Milliseconds()), true)
 		c.Errors <- errors.Wrap(err, t.urlContext)
 		return
 	}
-	metrics.RecordUploadDuration(float64(time.Now().Sub(start).Milliseconds()), false)
-	metrics.IncreaseSavedSessions()
+	c.metrics.RecordUploadDuration(float64(time.Now().Sub(start).Milliseconds()), false)
+	c.metrics.IncreaseSavedSessions()
 
 	if isCSS {
 		if t.depth > 0 {

backend/internal/heuristics/service.go

@@ -11,7 +11,7 @@ import (
 	"openreplay/backend/pkg/logger"
 	"openreplay/backend/pkg/memory"
 	"openreplay/backend/pkg/messages"
-	metrics "openreplay/backend/pkg/metrics/heuristics"
+	heuristicMetrics "openreplay/backend/pkg/metrics/heuristics"
 	"openreplay/backend/pkg/queue/types"
 )
 
@@ -23,11 +23,12 @@ type heuristicsImpl struct {
 	consumer types.Consumer
 	events   builders.EventBuilder
 	mm       memory.Manager
+	metrics  heuristicMetrics.Heuristics
 	done     chan struct{}
 	finished chan struct{}
 }
 
-func New(log logger.Logger, cfg *heuristics.Config, p types.Producer, c types.Consumer, e builders.EventBuilder, mm memory.Manager) service.Interface {
+func New(log logger.Logger, cfg *heuristics.Config, p types.Producer, c types.Consumer, e builders.EventBuilder, mm memory.Manager, metrics heuristicMetrics.Heuristics) service.Interface {
 	s := &heuristicsImpl{
 		log:      log,
 		ctx:      context.Background(),
@@ -36,6 +37,7 @@ func New(log logger.Logger, cfg *heuristics.Config, p types.Producer, c types.Co
 		consumer: c,
 		events:   e,
 		mm:       mm,
+		metrics:  metrics,
 		done:     make(chan struct{}),
 		finished: make(chan struct{}),
 	}
@@ -51,7 +53,7 @@ func (h *heuristicsImpl) run() {
 			if err := h.producer.Produce(h.cfg.TopicAnalytics, evt.SessionID(), evt.Encode()); err != nil {
 				h.log.Error(h.ctx, "can't send new event to queue: %s", err)
 			} else {
-				metrics.IncreaseTotalEvents(messageTypeName(evt))
+				h.metrics.IncreaseTotalEvents(messageTypeName(evt))
 			}
 		case <-tick:
 			h.producer.Flush(h.cfg.ProducerTimeout)

backend/internal/http/services/services.go

@@ -12,6 +12,7 @@ import (
 	featureflagsAPI "openreplay/backend/pkg/featureflags/api"
 	"openreplay/backend/pkg/flakeid"
 	"openreplay/backend/pkg/logger"
+	"openreplay/backend/pkg/metrics/database"
 	"openreplay/backend/pkg/metrics/web"
 	"openreplay/backend/pkg/objectstorage/store"
 	"openreplay/backend/pkg/projects"
@@ -36,8 +37,8 @@ type ServicesBuilder struct {
 	UxTestsAPI      api.Handlers
 }
 
-func New(log logger.Logger, cfg *http.Config, metrics web.Web, producer types.Producer, pgconn pool.Pool, redis *redis.Client) (*ServicesBuilder, error) {
-	projs := projects.New(log, pgconn, redis)
+func New(log logger.Logger, cfg *http.Config, webMetrics web.Web, dbMetrics database.Database, producer types.Producer, pgconn pool.Pool, redis *redis.Client) (*ServicesBuilder, error) {
+	projs := projects.New(log, pgconn, redis, dbMetrics)
 	objStore, err := store.NewStore(&cfg.ObjectsConfig)
 	if err != nil {
 		return nil, err
@@ -53,11 +54,11 @@ func New(log logger.Logger, cfg *http.Config, metrics web.Web, producer types.Pr
 	tokenizer := token.NewTokenizer(cfg.TokenSecret)
 	conditions := conditions.New(pgconn)
 	flaker := flakeid.NewFlaker(cfg.WorkerID)
-	sessions := sessions.New(log, pgconn, projs, redis)
+	sessions := sessions.New(log, pgconn, projs, redis, dbMetrics)
 	featureFlags := featureflags.New(pgconn)
 	tags := tags.New(log, pgconn)
 	uxTesting := uxtesting.New(pgconn)
-	responser := api.NewResponser(metrics)
+	responser := api.NewResponser(webMetrics)
 	builder := &ServicesBuilder{}
 	if builder.WebAPI, err = websessions.NewHandlers(cfg, log, responser, producer, projs, sessions, uaModule, geoModule, tokenizer, conditions, flaker); err != nil {
 		return nil, err

backend/internal/sessionender/ender.go

@@ -21,6 +21,7 @@ type session struct {
 
 // SessionEnder updates timestamp of last message for each session
 type SessionEnder struct {
+	metrics  ender.Ender
 	timeout  int64
 	sessions map[uint64]*session // map[sessionID]session
 	timeCtrl *timeController
@@ -28,8 +29,9 @@ type SessionEnder struct {
 	enabled  bool
 }
 
-func New(timeout int64, parts int) (*SessionEnder, error) {
+func New(metrics ender.Ender, timeout int64, parts int) (*SessionEnder, error) {
 	return &SessionEnder{
+		metrics:  metrics,
 		timeout:  timeout,
 		sessions: make(map[uint64]*session),
 		timeCtrl: NewTimeController(parts),
@@ -56,7 +58,7 @@ func (se *SessionEnder) ActivePartitions(parts []uint64) {
 	for sessID, _ := range se.sessions {
 		if !activeParts[sessID%se.parts] {
 			delete(se.sessions, sessID)
-			ender.DecreaseActiveSessions()
+			se.metrics.DecreaseActiveSessions()
 			removedSessions++
 		} else {
 			activeSessions++
@@ -89,8 +91,8 @@ func (se *SessionEnder) UpdateSession(msg messages.Message) {
 			isEnded:       false,
 			isMobile:      messages.IsMobileType(msg.TypeID()),
 		}
-		ender.IncreaseActiveSessions()
-		ender.IncreaseTotalSessions()
+		se.metrics.IncreaseActiveSessions()
+		se.metrics.IncreaseTotalSessions()
 		return
 	}
 	// Keep the highest user's timestamp for correct session duration value
@@ -139,8 +141,8 @@ func (se *SessionEnder) HandleEndedSessions(handler EndedSessionHandler) {
 			sess.isEnded = true
 			if res, _ := handler(sessID, sess.lastUserTime); res {
 				delete(se.sessions, sessID)
-				ender.DecreaseActiveSessions()
-				ender.IncreaseClosedSessions()
+				se.metrics.DecreaseActiveSessions()
+				se.metrics.IncreaseClosedSessions()
 				removedSessions++
 				if endCase == 2 {
 					brokerTime[1]++

backend/internal/sink/assetscache/assets.go

@@ -12,7 +12,7 @@ import (
 	"openreplay/backend/internal/config/sink"
 	"openreplay/backend/pkg/logger"
 	"openreplay/backend/pkg/messages"
-	metrics "openreplay/backend/pkg/metrics/sink"
+	sinkMetrics "openreplay/backend/pkg/metrics/sink"
 	"openreplay/backend/pkg/queue/types"
 	"openreplay/backend/pkg/url/assets"
 )
@@ -30,9 +30,10 @@ type AssetsCache struct {
 	producer  types.Producer
 	cache     map[string]*CachedAsset
 	blackList []string // use "example.com" to filter all domains or ".example.com" to filter only third-level domain
+	metrics   sinkMetrics.Sink
 }
 
-func New(log logger.Logger, cfg *sink.Config, rewriter *assets.Rewriter, producer types.Producer) *AssetsCache {
+func New(log logger.Logger, cfg *sink.Config, rewriter *assets.Rewriter, producer types.Producer, metrics sinkMetrics.Sink) *AssetsCache {
 	assetsCache := &AssetsCache{
 		log:       log,
 		cfg:       cfg,
@@ -40,6 +41,7 @@ func New(log logger.Logger, cfg *sink.Config, rewriter *assets.Rewriter, produce
 		producer:  producer,
 		cache:     make(map[string]*CachedAsset, 64),
 		blackList: make([]string, 0),
+		metrics:   metrics,
 	}
 	// Parse black list for cache layer
 	if len(cfg.CacheBlackList) > 0 {
@@ -76,7 +78,7 @@ func (e *AssetsCache) clearCache() {
 		if int64(now.Sub(cache.ts).Minutes()) > e.cfg.CacheExpiration {
 			deleted++
 			delete(e.cache, id)
-			metrics.DecreaseCachedAssets()
+			e.metrics.DecreaseCachedAssets()
 		}
 	}
 	e.log.Info(context.Background(), "cache cleaner: deleted %d/%d assets", deleted, cacheSize)
@@ -194,7 +196,7 @@ func parseHost(baseURL string) (string, error) {
 }
 
 func (e *AssetsCache) handleCSS(sessionID uint64, baseURL string, css string) string {
-	metrics.IncreaseTotalAssets()
+	e.metrics.IncreaseTotalAssets()
 	// Try to find asset in cache
 	h := md5.New()
 	// Cut first part of url (scheme + host)
@@ -217,7 +219,7 @@ func (e *AssetsCache) handleCSS(sessionID uint64, baseURL string, css string) st
 	e.mutex.RUnlock()
 	if ok {
 		if int64(time.Now().Sub(cachedAsset.ts).Minutes()) < e.cfg.CacheExpiration {
-			metrics.IncreaseSkippedAssets()
+			e.metrics.IncreaseSkippedAssets()
 			return cachedAsset.msg
 		}
 	}
@@ -229,8 +231,8 @@ func (e *AssetsCache) handleCSS(sessionID uint64, baseURL string, css string) st
 	start := time.Now()
 	res := e.getRewrittenCSS(sessionID, baseURL, css)
 	duration := time.Now().Sub(start).Milliseconds()
-	metrics.RecordAssetSize(float64(len(res)))
-	metrics.RecordProcessAssetDuration(float64(duration))
+	e.metrics.RecordAssetSize(float64(len(res)))
+	e.metrics.RecordProcessAssetDuration(float64(duration))
 	// Save asset to cache if we spent more than threshold
 	if duration > e.cfg.CacheThreshold {
 		e.mutex.Lock()
@@ -239,7 +241,7 @@ func (e *AssetsCache) handleCSS(sessionID uint64, baseURL string, css string) st
 			ts:  time.Now(),
 		}
 		e.mutex.Unlock()
-		metrics.IncreaseCachedAssets()
+		e.metrics.IncreaseCachedAssets()
 	}
 	// Return rewritten asset
 	return res

backend/internal/storage/storage.go

@@ -18,7 +18,7 @@ import (
 	config "openreplay/backend/internal/config/storage"
 	"openreplay/backend/pkg/logger"
 	"openreplay/backend/pkg/messages"
-	metrics "openreplay/backend/pkg/metrics/storage"
+	storageMetrics "openreplay/backend/pkg/metrics/storage"
 	"openreplay/backend/pkg/objectstorage"
 	"openreplay/backend/pkg/pool"
 )
@@ -77,9 +77,10 @@ type Storage struct {
 	splitTime     uint64
 	processorPool pool.WorkerPool
 	uploaderPool  pool.WorkerPool
+	metrics       storageMetrics.Storage
 }
 
-func New(cfg *config.Config, log logger.Logger, objStorage objectstorage.ObjectStorage) (*Storage, error) {
+func New(cfg *config.Config, log logger.Logger, objStorage objectstorage.ObjectStorage, metrics storageMetrics.Storage) (*Storage, error) {
 	switch {
 	case cfg == nil:
 		return nil, fmt.Errorf("config is empty")
@@ -92,6 +93,7 @@ func New(cfg *config.Config, log logger.Logger, objStorage objectstorage.ObjectS
 		objStorage: objStorage,
 		startBytes: make([]byte, cfg.FileSplitSize),
 		splitTime:  parseSplitTime(cfg.FileSplitTime),
+		metrics:    metrics,
 	}
 	s.processorPool = pool.NewPool(1, 1, s.doCompression)
 	s.uploaderPool = pool.NewPool(1, 1, s.uploadSession)
@@ -141,7 +143,7 @@ func (s *Storage) Process(ctx context.Context, msg *messages.SessionEnd) (err er
 	if err != nil {
 		if strings.Contains(err.Error(), "big file") {
 			s.log.Warn(ctx, "can't process session: %s", err)
-			metrics.IncreaseStorageTotalSkippedSessions()
+			s.metrics.IncreaseStorageTotalSkippedSessions()
 			return nil
 		}
 		return err
@@ -159,8 +161,8 @@ func (s *Storage) prepareSession(path string, tp FileType, task *Task) error {
 		return err
 	}
 
-	metrics.RecordSessionReadDuration(float64(time.Now().Sub(startRead).Milliseconds()), tp.String())
-	metrics.RecordSessionSize(float64(len(mob)), tp.String())
+	s.metrics.RecordSessionReadDuration(float64(time.Now().Sub(startRead).Milliseconds()), tp.String())
+	s.metrics.RecordSessionSize(float64(len(mob)), tp.String())
 
 	// Put opened session file into task struct
 	task.SetMob(mob, index, tp)
@@ -174,7 +176,7 @@ func (s *Storage) openSession(ctx context.Context, filePath string, tp FileType)
 	// Check file size before download into memory
 	info, err := os.Stat(filePath)
 	if err == nil && info.Size() > s.cfg.MaxFileSize {
-		metrics.RecordSkippedSessionSize(float64(info.Size()), tp.String())
+		s.metrics.RecordSkippedSessionSize(float64(info.Size()), tp.String())
 		return nil, -1, fmt.Errorf("big file, size: %d", info.Size())
 	}
 	// Read file into memory
@@ -190,7 +192,7 @@ func (s *Storage) openSession(ctx context.Context, filePath string, tp FileType)
 	if err != nil {
 		return nil, -1, fmt.Errorf("can't sort session, err: %s", err)
 	}
-	metrics.RecordSessionSortDuration(float64(time.Now().Sub(start).Milliseconds()), tp.String())
+	s.metrics.RecordSessionSortDuration(float64(time.Now().Sub(start).Milliseconds()), tp.String())
 	return mob, index, nil
 }
 
@@ -234,12 +236,12 @@ func (s *Storage) packSession(task *Task, tp FileType) {
 		// Compression
 		start := time.Now()
 		data := s.compress(task.ctx, mob, task.compression)
-		metrics.RecordSessionCompressDuration(float64(time.Now().Sub(start).Milliseconds()), tp.String())
+		s.metrics.RecordSessionCompressDuration(float64(time.Now().Sub(start).Milliseconds()), tp.String())
 
 		// Encryption
 		start = time.Now()
 		result := s.encryptSession(task.ctx, data.Bytes(), task.key)
-		metrics.RecordSessionEncryptionDuration(float64(time.Now().Sub(start).Milliseconds()), tp.String())
+		s.metrics.RecordSessionEncryptionDuration(float64(time.Now().Sub(start).Milliseconds()), tp.String())
 
 		if tp == DOM {
 			task.doms = bytes.NewBuffer(result)
@@ -296,8 +298,8 @@ func (s *Storage) packSession(task *Task, tp FileType) {
 	wg.Wait()
 
 	// Record metrics
-	metrics.RecordSessionEncryptionDuration(float64(firstEncrypt+secondEncrypt), tp.String())
-	metrics.RecordSessionCompressDuration(float64(firstPart+secondPart), tp.String())
+	s.metrics.RecordSessionEncryptionDuration(float64(firstEncrypt+secondEncrypt), tp.String())
+	s.metrics.RecordSessionCompressDuration(float64(firstPart+secondPart), tp.String())
 }
 
 func (s *Storage) encryptSession(ctx context.Context, data []byte, encryptionKey string) []byte {
@@ -382,7 +384,7 @@ func (s *Storage) uploadSession(payload interface{}) {
 	go func() {
 		if task.doms != nil {
 			// Record compression ratio
-			metrics.RecordSessionCompressionRatio(task.domsRawSize/float64(task.doms.Len()), DOM.String())
+			s.metrics.RecordSessionCompressionRatio(task.domsRawSize/float64(task.doms.Len()), DOM.String())
 			// Upload session to s3
 			start := time.Now()
 			if err := s.objStorage.Upload(task.doms, task.id+string(DOM)+"s", "application/octet-stream", objectstorage.NoContentEncoding, task.compression); err != nil {
@@ -395,7 +397,7 @@ func (s *Storage) uploadSession(payload interface{}) {
 	go func() {
 		if task.dome != nil {
 			// Record compression ratio
-			metrics.RecordSessionCompressionRatio(task.domeRawSize/float64(task.dome.Len()), DOM.String())
+			s.metrics.RecordSessionCompressionRatio(task.domeRawSize/float64(task.dome.Len()), DOM.String())
 			// Upload session to s3
 			start := time.Now()
 			if err := s.objStorage.Upload(task.dome, task.id+string(DOM)+"e", "application/octet-stream", objectstorage.NoContentEncoding, task.compression); err != nil {
@@ -408,7 +410,7 @@ func (s *Storage) uploadSession(payload interface{}) {
 	go func() {
 		if task.dev != nil {
 			// Record compression ratio
-			metrics.RecordSessionCompressionRatio(task.devRawSize/float64(task.dev.Len()), DEV.String())
+			s.metrics.RecordSessionCompressionRatio(task.devRawSize/float64(task.dev.Len()), DEV.String())
 			// Upload session to s3
 			start := time.Now()
 			if err := s.objStorage.Upload(task.dev, task.id+string(DEV), "application/octet-stream", objectstorage.NoContentEncoding, task.compression); err != nil {
@@ -419,9 +421,9 @@ func (s *Storage) uploadSession(payload interface{}) {
 		wg.Done()
 	}()
 	wg.Wait()
-	metrics.RecordSessionUploadDuration(float64(uploadDoms+uploadDome), DOM.String())
-	metrics.RecordSessionUploadDuration(float64(uploadDev), DEV.String())
-	metrics.IncreaseStorageTotalSessions()
+	s.metrics.RecordSessionUploadDuration(float64(uploadDoms+uploadDome), DOM.String())
+	s.metrics.RecordSessionUploadDuration(float64(uploadDev), DEV.String())
+	s.metrics.IncreaseStorageTotalSessions()
 }
 
 func (s *Storage) doCompression(payload interface{}) {

backend/pkg/analytics/builder.go

@@ -3,6 +3,7 @@ package analytics
 import (
 	"github.com/go-playground/validator/v10"
 	"openreplay/backend/pkg/analytics/charts"
+	"openreplay/backend/pkg/metrics/database"
 	"time"
 
 	"openreplay/backend/internal/config/analytics"
@@ -26,9 +27,9 @@ type ServicesBuilder struct {
 	ChartsAPI     api.Handlers
 }
 
-func NewServiceBuilder(log logger.Logger, cfg *analytics.Config, webMetrics web.Web, pgconn pool.Pool) (*ServicesBuilder, error) {
+func NewServiceBuilder(log logger.Logger, cfg *analytics.Config, webMetrics web.Web, dbMetrics database.Database, pgconn pool.Pool) (*ServicesBuilder, error) {
 	responser := api.NewResponser(webMetrics)
-	audiTrail, err := tracer.NewTracer(log, pgconn)
+	audiTrail, err := tracer.NewTracer(log, pgconn, dbMetrics)
 	if err != nil {
 		return nil, err
 	}

backend/pkg/db/clickhouse/bulk.go

@@ -19,12 +19,13 @@ type Bulk interface {
 
 type bulkImpl struct {
 	conn    driver.Conn
+	metrics database.Database
 	table   string
 	query   string
 	values  [][]interface{}
 }
 
-func NewBulk(conn driver.Conn, table, query string) (Bulk, error) {
+func NewBulk(conn driver.Conn, metrics database.Database, table, query string) (Bulk, error) {
 	switch {
 	case conn == nil:
 		return nil, errors.New("clickhouse connection is empty")
@@ -35,6 +36,7 @@ func NewBulk(conn driver.Conn, table, query string) (Bulk, error) {
 	}
 	return &bulkImpl{
 		conn:    conn,
+		metrics: metrics,
 		table:   table,
 		query:   query,
 		values:  make([][]interface{}, 0),
@@ -60,8 +62,8 @@ func (b *bulkImpl) Send() error {
 	}
 	err = batch.Send()
 	// Save bulk metrics
-	database.RecordBulkElements(float64(len(b.values)), "ch", b.table)
-	database.RecordBulkInsertDuration(float64(time.Now().Sub(start).Milliseconds()), "ch", b.table)
+	b.metrics.RecordBulkElements(float64(len(b.values)), "ch", b.table)
+	b.metrics.RecordBulkInsertDuration(float64(time.Now().Sub(start).Milliseconds()), "ch", b.table)
 	// Prepare values slice for a new data
 	b.values = make([][]interface{}, 0)
 	return err

backend/pkg/db/clickhouse/connector.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"hash/fnv"
 	"log"
+	"openreplay/backend/pkg/metrics/database"
 	"strings"
 	"time"
 
@@ -57,13 +58,14 @@ func NewTask() *task {
 
 type connectorImpl struct {
 	conn       driver.Conn
+	metrics    database.Database
 	batches    map[string]Bulk //driver.Batch
 	workerTask chan *task
 	done       chan struct{}
 	finished   chan struct{}
 }
 
-func NewConnector(cfg common.Clickhouse) Connector {
+func NewConnector(cfg common.Clickhouse, metrics database.Database) Connector {
 	conn, err := clickhouse.Open(&clickhouse.Options{
 		Addr: []string{cfg.GetTrimmedURL()},
 		Auth: clickhouse.Auth{
@@ -84,6 +86,7 @@ func NewConnector(cfg common.Clickhouse) Connector {
 
 	c := &connectorImpl{
 		conn:       conn,
+		metrics:    metrics,
 		batches:    make(map[string]Bulk, 20),
 		workerTask: make(chan *task, 1),
 		done:       make(chan struct{}),
@@ -94,7 +97,7 @@ func NewConnector(cfg common.Clickhouse) Connector {
 }
 
 func (c *connectorImpl) newBatch(name, query string) error {
-	batch, err := NewBulk(c.conn, name, query)
+	batch, err := NewBulk(c.conn, c.metrics, name, query)
 	if err != nil {
 		return fmt.Errorf("can't create new batch: %s", err)
 	}

backend/pkg/db/postgres/batch/batches.go

@@ -52,6 +52,7 @@ func NewBatchesTask(size int) *batchesTask {
 type BatchSet struct {
 	log        logger.Logger
 	c          pool.Pool
+	metrics    database.Database
 	ctx        context.Context
 	batches    map[uint64]*SessionBatch
 	workerTask chan *batchesTask
@@ -59,10 +60,11 @@ type BatchSet struct {
 	finished   chan struct{}
 }
 
-func NewBatchSet(log logger.Logger, c pool.Pool) *BatchSet {
+func NewBatchSet(log logger.Logger, c pool.Pool, metrics database.Database) *BatchSet {
 	bs := &BatchSet{
 		log:        log,
 		c:          c,
+		metrics:    metrics,
 		ctx:        context.Background(),
 		batches:    make(map[uint64]*SessionBatch),
 		workerTask: make(chan *batchesTask, 1),
@@ -104,7 +106,7 @@ func (conn *BatchSet) Stop() {
 func (conn *BatchSet) sendBatches(t *batchesTask) {
 	for _, batch := range t.batches {
 		// Record batch size
-		database.RecordBatchElements(float64(batch.Len()))
+		conn.metrics.RecordBatchElements(float64(batch.Len()))
 
 		start := time.Now()
 
@@ -120,7 +122,7 @@ func (conn *BatchSet) sendBatches(t *batchesTask) {
 			}
 		}
 		br.Close() // returns err
-		database.RecordBatchInsertDuration(float64(time.Now().Sub(start).Milliseconds()))
+		conn.metrics.RecordBatchInsertDuration(float64(time.Now().Sub(start).Milliseconds()))
 	}
 }
 

backend/pkg/db/postgres/bulk.go

@@ -24,6 +24,7 @@ type Bulk interface {
 
 type bulkImpl struct {
 	conn      pool.Pool
+	metrics   database.Database
 	table     string
 	columns   string
 	template  string
@@ -75,12 +76,12 @@ func (b *bulkImpl) send() error {
 		return fmt.Errorf("send bulk err: %s", err)
 	}
 	// Save bulk metrics
-	database.RecordBulkElements(float64(size), "pg", b.table)
-	database.RecordBulkInsertDuration(float64(time.Now().Sub(start).Milliseconds()), "pg", b.table)
+	b.metrics.RecordBulkElements(float64(size), "pg", b.table)
+	b.metrics.RecordBulkInsertDuration(float64(time.Now().Sub(start).Milliseconds()), "pg", b.table)
 	return nil
 }
 
-func NewBulk(conn pool.Pool, table, columns, template string, setSize, sizeLimit int) (Bulk, error) {
+func NewBulk(conn pool.Pool, metrics database.Database, table, columns, template string, setSize, sizeLimit int) (Bulk, error) {
 	switch {
 	case conn == nil:
 		return nil, errors.New("db conn is empty")
@@ -97,6 +98,7 @@ func NewBulk(conn pool.Pool, table, columns, template string, setSize, sizeLimit
 	}
 	return &bulkImpl{
 		conn:      conn,
+		metrics:   metrics,
 		table:     table,
 		columns:   columns,
 		template:  template,

backend/pkg/db/postgres/bulks.go

@@ -2,6 +2,7 @@ package postgres
 
 import (
 	"context"
+	"openreplay/backend/pkg/metrics/database"
 
 	"openreplay/backend/pkg/db/postgres/pool"
 	"openreplay/backend/pkg/logger"
@@ -21,6 +22,7 @@ type BulkSet struct {
 	log               logger.Logger
 	c                 pool.Pool
 	ctx               context.Context
+	metrics           database.Database
 	autocompletes     Bulk
 	requests          Bulk
 	customEvents      Bulk
@@ -43,10 +45,11 @@ type BulkSet struct {
 	finished          chan struct{}
 }
 
-func NewBulkSet(log logger.Logger, c pool.Pool) *BulkSet {
+func NewBulkSet(log logger.Logger, c pool.Pool, metrics database.Database) *BulkSet {
 	bs := &BulkSet{
 		log:        log,
 		c:          c,
+		metrics:    metrics,
 		ctx:        context.Background(),
 		workerTask: make(chan *bulksTask, 1),
 		done:       make(chan struct{}),
@@ -100,7 +103,7 @@ func (conn *BulkSet) Get(name string) Bulk {
 
 func (conn *BulkSet) initBulks() {
 	var err error
-	conn.autocompletes, err = NewBulk(conn.c,
+	conn.autocompletes, err = NewBulk(conn.c, conn.metrics,
 		"autocomplete",
 		"(value, type, project_id)",
 		"($%d, $%d, $%d)",
@@ -108,7 +111,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create autocomplete bulk: %s", err)
 	}
-	conn.requests, err = NewBulk(conn.c,
+	conn.requests, err = NewBulk(conn.c, conn.metrics,
 		"events_common.requests",
 		"(session_id, timestamp, seq_index, url, duration, success)",
 		"($%d, $%d, $%d, LEFT($%d, 8000), $%d, $%d)",
@@ -116,7 +119,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create requests bulk: %s", err)
 	}
-	conn.customEvents, err = NewBulk(conn.c,
+	conn.customEvents, err = NewBulk(conn.c, conn.metrics,
 		"events_common.customs",
 		"(session_id, timestamp, seq_index, name, payload)",
 		"($%d, $%d, $%d, LEFT($%d, 2000), $%d)",
@@ -124,7 +127,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create customEvents bulk: %s", err)
 	}
-	conn.webPageEvents, err = NewBulk(conn.c,
+	conn.webPageEvents, err = NewBulk(conn.c, conn.metrics,
 		"events.pages",
 		"(session_id, message_id, timestamp, referrer, base_referrer, host, path, query, dom_content_loaded_time, "+
 			"load_time, response_end, first_paint_time, first_contentful_paint_time, speed_index, visually_complete, "+
@@ -136,7 +139,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webPageEvents bulk: %s", err)
 	}
-	conn.webInputDurations, err = NewBulk(conn.c,
+	conn.webInputDurations, err = NewBulk(conn.c, conn.metrics,
 		"events.inputs",
 		"(session_id, message_id, timestamp, label, hesitation, duration)",
 		"($%d, $%d, $%d, NULLIF(LEFT($%d, 2000),''), $%d, $%d)",
@@ -144,7 +147,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webInputDurations bulk: %s", err)
 	}
-	conn.webGraphQL, err = NewBulk(conn.c,
+	conn.webGraphQL, err = NewBulk(conn.c, conn.metrics,
 		"events.graphql",
 		"(session_id, timestamp, message_id, name, request_body, response_body)",
 		"($%d, $%d, $%d, LEFT($%d, 2000), $%d, $%d)",
@@ -152,7 +155,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webGraphQL bulk: %s", err)
 	}
-	conn.webErrors, err = NewBulk(conn.c,
+	conn.webErrors, err = NewBulk(conn.c, conn.metrics,
 		"errors",
 		"(error_id, project_id, source, name, message, payload)",
 		"($%d, $%d, $%d, $%d, $%d, $%d::jsonb)",
@@ -160,7 +163,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webErrors bulk: %s", err)
 	}
-	conn.webErrorEvents, err = NewBulk(conn.c,
+	conn.webErrorEvents, err = NewBulk(conn.c, conn.metrics,
 		"events.errors",
 		"(session_id, message_id, timestamp, error_id)",
 		"($%d, $%d, $%d, $%d)",
@@ -168,7 +171,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webErrorEvents bulk: %s", err)
 	}
-	conn.webErrorTags, err = NewBulk(conn.c,
+	conn.webErrorTags, err = NewBulk(conn.c, conn.metrics,
 		"public.errors_tags",
 		"(session_id, message_id, error_id, key, value)",
 		"($%d, $%d, $%d, $%d, $%d)",
@@ -176,7 +179,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webErrorTags bulk: %s", err)
 	}
-	conn.webIssues, err = NewBulk(conn.c,
+	conn.webIssues, err = NewBulk(conn.c, conn.metrics,
 		"issues",
 		"(project_id, issue_id, type, context_string)",
 		"($%d, $%d, $%d, $%d)",
@@ -184,7 +187,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webIssues bulk: %s", err)
 	}
-	conn.webIssueEvents, err = NewBulk(conn.c,
+	conn.webIssueEvents, err = NewBulk(conn.c, conn.metrics,
 		"events_common.issues",
 		"(session_id, issue_id, timestamp, seq_index, payload)",
 		"($%d, $%d, $%d, $%d, CAST($%d AS jsonb))",
@@ -192,7 +195,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webIssueEvents bulk: %s", err)
 	}
-	conn.webCustomEvents, err = NewBulk(conn.c,
+	conn.webCustomEvents, err = NewBulk(conn.c, conn.metrics,
 		"events_common.customs",
 		"(session_id, seq_index, timestamp, name, payload, level)",
 		"($%d, $%d, $%d, LEFT($%d, 2000), $%d, $%d)",
@@ -200,7 +203,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webCustomEvents bulk: %s", err)
 	}
-	conn.webClickEvents, err = NewBulk(conn.c,
+	conn.webClickEvents, err = NewBulk(conn.c, conn.metrics,
 		"events.clicks",
 		"(session_id, message_id, timestamp, label, selector, url, path, hesitation)",
 		"($%d, $%d, $%d, NULLIF(LEFT($%d, 2000), ''), LEFT($%d, 8000), LEFT($%d, 2000), LEFT($%d, 2000), $%d)",
@@ -208,7 +211,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webClickEvents bulk: %s", err)
 	}
-	conn.webClickXYEvents, err = NewBulk(conn.c,
+	conn.webClickXYEvents, err = NewBulk(conn.c, conn.metrics,
 		"events.clicks",
 		"(session_id, message_id, timestamp, label, selector, url, path, hesitation, normalized_x, normalized_y)",
 		"($%d, $%d, $%d, NULLIF(LEFT($%d, 2000), ''), LEFT($%d, 8000), LEFT($%d, 2000), LEFT($%d, 2000), $%d, $%d, $%d)",
@@ -216,7 +219,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webClickEvents bulk: %s", err)
 	}
-	conn.webNetworkRequest, err = NewBulk(conn.c,
+	conn.webNetworkRequest, err = NewBulk(conn.c, conn.metrics,
 		"events_common.requests",
 		"(session_id, timestamp, seq_index, url, host, path, query, request_body, response_body, status_code, method, duration, success, transfer_size)",
 		"($%d, $%d, $%d, LEFT($%d, 8000), LEFT($%d, 300), LEFT($%d, 2000), LEFT($%d, 8000), $%d, $%d, $%d::smallint, NULLIF($%d, '')::http_method, $%d, $%d, $%d)",
@@ -224,7 +227,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webNetworkRequest bulk: %s", err)
 	}
-	conn.webCanvasNodes, err = NewBulk(conn.c,
+	conn.webCanvasNodes, err = NewBulk(conn.c, conn.metrics,
 		"events.canvas_recordings",
 		"(session_id, recording_id, timestamp)",
 		"($%d, $%d, $%d)",
@@ -232,7 +235,7 @@ func (conn *BulkSet) initBulks() {
 	if err != nil {
 		conn.log.Fatal(conn.ctx, "can't create webCanvasNodes bulk: %s", err)
 	}
-	conn.webTagTriggers, err = NewBulk(conn.c,
+	conn.webTagTriggers, err = NewBulk(conn.c, conn.metrics,
 		"events.tags",
 		"(session_id, timestamp, seq_index, tag_id)",
 		"($%d, $%d, $%d, $%d)",

backend/pkg/db/postgres/connector.go

@@ -2,6 +2,7 @@ package postgres
 
 import (
 	"context"
+	"openreplay/backend/pkg/metrics/database"
 
 	"openreplay/backend/pkg/db/postgres/batch"
 	"openreplay/backend/pkg/db/postgres/pool"
@@ -22,7 +23,7 @@ type Conn struct {
 	chConn  CH
 }
 
-func NewConn(log logger.Logger, pool pool.Pool, ch CH) *Conn {
+func NewConn(log logger.Logger, pool pool.Pool, ch CH, metrics database.Database) *Conn {
 	if pool == nil {
 		log.Fatal(context.Background(), "pg pool is empty")
 	}
@@ -30,8 +31,8 @@ func NewConn(log logger.Logger, pool pool.Pool, ch CH) *Conn {
 		log:     log,
 		Pool:    pool,
 		chConn:  ch,
-		bulks:   NewBulkSet(log, pool),
-		batches: batch.NewBatchSet(log, pool),
+		bulks:   NewBulkSet(log, pool, metrics),
+		batches: batch.NewBatchSet(log, pool, metrics),
 	}
 }
 

backend/pkg/db/postgres/pool/pool.go

@@ -25,56 +25,10 @@ type Pool interface {
 type poolImpl struct {
 	url     string
 	conn    *pgxpool.Pool
+	metrics database.Database
 }
 
-func (p *poolImpl) Query(sql string, args ...interface{}) (pgx.Rows, error) {
-	start := time.Now()
-	res, err := p.conn.Query(getTimeoutContext(), sql, args...)
-	method, table := methodName(sql)
-	database.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
-	database.IncreaseTotalRequests(method, table)
-	return res, err
-}
-
-func (p *poolImpl) QueryRow(sql string, args ...interface{}) pgx.Row {
-	start := time.Now()
-	res := p.conn.QueryRow(getTimeoutContext(), sql, args...)
-	method, table := methodName(sql)
-	database.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
-	database.IncreaseTotalRequests(method, table)
-	return res
-}
-
-func (p *poolImpl) Exec(sql string, arguments ...interface{}) error {
-	start := time.Now()
-	_, err := p.conn.Exec(getTimeoutContext(), sql, arguments...)
-	method, table := methodName(sql)
-	database.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
-	database.IncreaseTotalRequests(method, table)
-	return err
-}
-
-func (p *poolImpl) SendBatch(b *pgx.Batch) pgx.BatchResults {
-	start := time.Now()
-	res := p.conn.SendBatch(getTimeoutContext(), b)
-	database.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "sendBatch", "")
-	database.IncreaseTotalRequests("sendBatch", "")
-	return res
-}
-
-func (p *poolImpl) Begin() (*Tx, error) {
-	start := time.Now()
-	tx, err := p.conn.Begin(context.Background())
-	database.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "begin", "")
-	database.IncreaseTotalRequests("begin", "")
-	return &Tx{tx}, err
-}
-
-func (p *poolImpl) Close() {
-	p.conn.Close()
-}
-
-func New(url string) (Pool, error) {
+func New(metrics database.Database, url string) (Pool, error) {
 	if url == "" {
 		return nil, errors.New("pg connection url is empty")
 	}
@@ -85,22 +39,71 @@ func New(url string) (Pool, error) {
 	res := &poolImpl{
 		url:     url,
 		conn:    conn,
+		metrics: metrics,
 	}
 	return res, nil
 }
 
+func (p *poolImpl) Query(sql string, args ...interface{}) (pgx.Rows, error) {
+	start := time.Now()
+	res, err := p.conn.Query(getTimeoutContext(), sql, args...)
+	method, table := methodName(sql)
+	p.metrics.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
+	p.metrics.IncreaseTotalRequests(method, table)
+	return res, err
+}
+
+func (p *poolImpl) QueryRow(sql string, args ...interface{}) pgx.Row {
+	start := time.Now()
+	res := p.conn.QueryRow(getTimeoutContext(), sql, args...)
+	method, table := methodName(sql)
+	p.metrics.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
+	p.metrics.IncreaseTotalRequests(method, table)
+	return res
+}
+
+func (p *poolImpl) Exec(sql string, arguments ...interface{}) error {
+	start := time.Now()
+	_, err := p.conn.Exec(getTimeoutContext(), sql, arguments...)
+	method, table := methodName(sql)
+	p.metrics.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
+	p.metrics.IncreaseTotalRequests(method, table)
+	return err
+}
+
+func (p *poolImpl) SendBatch(b *pgx.Batch) pgx.BatchResults {
+	start := time.Now()
+	res := p.conn.SendBatch(getTimeoutContext(), b)
+	p.metrics.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "sendBatch", "")
+	p.metrics.IncreaseTotalRequests("sendBatch", "")
+	return res
+}
+
+func (p *poolImpl) Begin() (*Tx, error) {
+	start := time.Now()
+	tx, err := p.conn.Begin(context.Background())
+	p.metrics.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "begin", "")
+	p.metrics.IncreaseTotalRequests("begin", "")
+	return &Tx{tx, p.metrics}, err
+}
+
+func (p *poolImpl) Close() {
+	p.conn.Close()
+}
+
 // TX - start
 
 type Tx struct {
 	pgx.Tx
+	metrics database.Database
 }
 
 func (tx *Tx) TxExec(sql string, args ...interface{}) error {
 	start := time.Now()
 	_, err := tx.Exec(context.Background(), sql, args...)
 	method, table := methodName(sql)
-	database.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
-	database.IncreaseTotalRequests(method, table)
+	tx.metrics.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
+	tx.metrics.IncreaseTotalRequests(method, table)
 	return err
 }
 
@@ -108,24 +111,24 @@ func (tx *Tx) TxQueryRow(sql string, args ...interface{}) pgx.Row {
 	start := time.Now()
 	res := tx.QueryRow(context.Background(), sql, args...)
 	method, table := methodName(sql)
-	database.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
-	database.IncreaseTotalRequests(method, table)
+	tx.metrics.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), method, table)
+	tx.metrics.IncreaseTotalRequests(method, table)
 	return res
 }
 
 func (tx *Tx) TxRollback() error {
 	start := time.Now()
 	err := tx.Rollback(context.Background())
-	database.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "rollback", "")
-	database.IncreaseTotalRequests("rollback", "")
+	tx.metrics.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "rollback", "")
+	tx.metrics.IncreaseTotalRequests("rollback", "")
 	return err
 }
 
 func (tx *Tx) TxCommit() error {
 	start := time.Now()
 	err := tx.Commit(context.Background())
-	database.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "commit", "")
-	database.IncreaseTotalRequests("commit", "")
+	tx.metrics.RecordRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "commit", "")
+	tx.metrics.IncreaseTotalRequests("commit", "")
 	return err
 }
 

backend/pkg/integrations/builder.go

@@ -2,6 +2,7 @@ package integrations
 
 import (
 	"openreplay/backend/pkg/integrations/service"
+	"openreplay/backend/pkg/metrics/database"
 	"openreplay/backend/pkg/metrics/web"
 	"openreplay/backend/pkg/server/tracer"
 	"time"
@@ -23,7 +24,7 @@ type ServiceBuilder struct {
 	IntegrationsAPI api.Handlers
 }
 
-func NewServiceBuilder(log logger.Logger, cfg *integrations.Config, webMetrics web.Web, pgconn pool.Pool) (*ServiceBuilder, error) {
+func NewServiceBuilder(log logger.Logger, cfg *integrations.Config, webMetrics web.Web, dbMetrics database.Database, pgconn pool.Pool) (*ServiceBuilder, error) {
 	objStore, err := store.NewStore(&cfg.ObjectsConfig)
 	if err != nil {
 		return nil, err
@@ -37,7 +38,7 @@ func NewServiceBuilder(log logger.Logger, cfg *integrations.Config, webMetrics w
 	if err != nil {
 		return nil, err
 	}
-	auditrail, err := tracer.NewTracer(log, pgconn)
+	auditrail, err := tracer.NewTracer(log, pgconn, dbMetrics)
 	if err != nil {
 		return nil, err
 	}

backend/pkg/messages/iterator-sink.go

@@ -8,11 +8,13 @@ import (
 type sinkIteratorImpl struct {
 	coreIterator MessageIterator
 	handler      MessageHandler
+	metrics      sink.Sink
 }
 
-func NewSinkMessageIterator(log logger.Logger, messageHandler MessageHandler, messageFilter []int, autoDecode bool) MessageIterator {
+func NewSinkMessageIterator(log logger.Logger, messageHandler MessageHandler, messageFilter []int, autoDecode bool, metrics sink.Sink) MessageIterator {
 	iter := &sinkIteratorImpl{
 		handler: messageHandler,
+		metrics: metrics,
 	}
 	iter.coreIterator = NewMessageIterator(log, iter.handle, messageFilter, autoDecode)
 	return iter
@@ -23,8 +25,8 @@ func (i *sinkIteratorImpl) handle(message Message) {
 }
 
 func (i *sinkIteratorImpl) Iterate(batchData []byte, batchInfo *BatchInfo) {
-	sink.RecordBatchSize(float64(len(batchData)))
-	sink.IncreaseTotalBatches()
+	i.metrics.RecordBatchSize(float64(len(batchData)))
+	i.metrics.IncreaseTotalBatches()
 	// Call core iterator
 	i.coreIterator.Iterate(batchData, batchInfo)
 	// Send batch end signal

backend/pkg/metrics/analytics/analytics.go

@@ -1,22 +0,0 @@
-package analytics
-
-import (
-	"github.com/prometheus/client_golang/prometheus"
-
-	"openreplay/backend/pkg/metrics/common"
-)
-
-var cardCreated = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "card",
-		Name:      "created",
-		Help:      "Histogram for tracking card creation",
-		Buckets:   common.DefaultBuckets,
-	},
-)
-
-func List() []prometheus.Collector {
-	return []prometheus.Collector{
-		cardCreated,
-	}
-}

backend/pkg/metrics/assets/metrics.go

@@ -2,71 +2,22 @@ package assets
 
 import (
 	"github.com/prometheus/client_golang/prometheus"
-	"openreplay/backend/pkg/metrics/common"
-	"strconv"
 )
 
-var assetsProcessedSessions = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "assets",
-		Name:      "processed_total",
-		Help:      "A counter displaying the total count of processed assets.",
-	},
-)
-
-func IncreaseProcessesSessions() {
-	assetsProcessedSessions.Inc()
+type Assets interface {
+	IncreaseProcessesSessions()
+	IncreaseSavedSessions()
+	RecordDownloadDuration(durMillis float64, code int)
+	RecordUploadDuration(durMillis float64, isFailed bool)
+	List() []prometheus.Collector
 }
 
-var assetsSavedSessions = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "assets",
-		Name:      "saved_total",
-		Help:      "A counter displaying the total number of cached assets.",
-	},
-)
+type assetsImpl struct{}
 
-func IncreaseSavedSessions() {
-	assetsSavedSessions.Inc()
-}
+func New(serviceName string) Assets { return &assetsImpl{} }
 
-var assetsDownloadDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "assets",
-		Name:      "download_duration_seconds",
-		Help:      "A histogram displaying the duration of downloading for each asset in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"response_code"},
-)
-
-func RecordDownloadDuration(durMillis float64, code int) {
-	assetsDownloadDuration.WithLabelValues(strconv.Itoa(code)).Observe(durMillis / 1000.0)
-}
-
-var assetsUploadDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "assets",
-		Name:      "upload_s3_duration_seconds",
-		Help:      "A histogram displaying the duration of uploading to s3 for each asset in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"failed"},
-)
-
-func RecordUploadDuration(durMillis float64, isFailed bool) {
-	failed := "false"
-	if isFailed {
-		failed = "true"
-	}
-	assetsUploadDuration.WithLabelValues(failed).Observe(durMillis / 1000.0)
-}
-
-func List() []prometheus.Collector {
-	return []prometheus.Collector{
-		assetsProcessedSessions,
-		assetsSavedSessions,
-		assetsDownloadDuration,
-		assetsUploadDuration,
-	}
-}
+func (a *assetsImpl) List() []prometheus.Collector                          { return []prometheus.Collector{} }
+func (a *assetsImpl) IncreaseProcessesSessions()                            {}
+func (a *assetsImpl) IncreaseSavedSessions()                                {}
+func (a *assetsImpl) RecordDownloadDuration(durMillis float64, code int)    {}
+func (a *assetsImpl) RecordUploadDuration(durMillis float64, isFailed bool) {}

backend/pkg/metrics/canvas/metrics.go

@@ -2,7 +2,6 @@ package canvas
 
 import (
 	"github.com/prometheus/client_golang/prometheus"
-	"openreplay/backend/pkg/metrics/common"
 )
 
 type Canvas interface {
@@ -18,175 +17,17 @@ type Canvas interface {
 	List() []prometheus.Collector
 }
 
-type canvasImpl struct {
-	canvasesImageSize            prometheus.Histogram
-	canvasesTotalSavedImages     prometheus.Counter
-	canvasesImagesPerCanvas      prometheus.Histogram
-	canvasesCanvasesPerSession   prometheus.Histogram
-	canvasesPreparingDuration    prometheus.Histogram
-	canvasesTotalCreatedArchives prometheus.Counter
-	canvasesArchivingDuration    prometheus.Histogram
-	canvasesArchiveSize          prometheus.Histogram
-	canvasesUploadingDuration    prometheus.Histogram
-}
+type canvasImpl struct{}
 
-func New(serviceName string) Canvas {
-	return &canvasImpl{
-		canvasesImageSize:            newImageSizeMetric(serviceName),
-		canvasesTotalSavedImages:     newTotalSavedImages(serviceName),
-		canvasesImagesPerCanvas:      newImagesPerCanvas(serviceName),
-		canvasesCanvasesPerSession:   newCanvasesPerSession(serviceName),
-		canvasesPreparingDuration:    newPreparingDuration(serviceName),
-		canvasesTotalCreatedArchives: newTotalCreatedArchives(serviceName),
-		canvasesArchivingDuration:    newArchivingDuration(serviceName),
-		canvasesArchiveSize:          newArchiveSize(serviceName),
-		canvasesUploadingDuration:    newUploadingDuration(serviceName),
-	}
-}
+func New(serviceName string) Canvas { return &canvasImpl{} }
 
-func (c *canvasImpl) List() []prometheus.Collector {
-	return []prometheus.Collector{
-		c.canvasesImageSize,
-		c.canvasesTotalSavedImages,
-		c.canvasesImagesPerCanvas,
-		c.canvasesCanvasesPerSession,
-		c.canvasesPreparingDuration,
-		c.canvasesTotalCreatedArchives,
-		c.canvasesArchivingDuration,
-		c.canvasesArchiveSize,
-		c.canvasesUploadingDuration,
-	}
-}
-
-func newImageSizeMetric(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "image_size_bytes",
-			Help:      "A histogram displaying the size of each canvas image in bytes.",
-			Buckets:   common.DefaultSizeBuckets,
-		},
-	)
-}
-
-func (c *canvasImpl) RecordCanvasImageSize(size float64) {
-	c.canvasesImageSize.Observe(size)
-}
-
-func newTotalSavedImages(serviceName string) prometheus.Counter {
-	return prometheus.NewCounter(
-		prometheus.CounterOpts{
-			Namespace: serviceName,
-			Name:      "total_saved_images",
-			Help:      "A counter displaying the total number of saved images.",
-		},
-	)
-}
-
-func (c *canvasImpl) IncreaseTotalSavedImages() {
-	c.canvasesTotalSavedImages.Inc()
-}
-
-func newImagesPerCanvas(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "images_per_canvas",
-			Help:      "A histogram displaying the number of images per canvas.",
-			Buckets:   common.DefaultBuckets,
-		},
-	)
-}
-
-func (c *canvasImpl) RecordImagesPerCanvas(number float64) {
-	c.canvasesImagesPerCanvas.Observe(number)
-}
-
-func newCanvasesPerSession(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "canvases_per_session",
-			Help:      "A histogram displaying the number of canvases per session.",
-			Buckets:   common.DefaultBuckets,
-		},
-	)
-}
-
-func (c *canvasImpl) RecordCanvasesPerSession(number float64) {
-	c.canvasesCanvasesPerSession.Observe(number)
-}
-
-func newPreparingDuration(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "preparing_duration_seconds",
-			Help:      "A histogram displaying the duration of preparing the list of canvases for each session in seconds.",
-			Buckets:   common.DefaultDurationBuckets,
-		},
-	)
-}
-
-func (c *canvasImpl) RecordPreparingDuration(duration float64) {
-	c.canvasesPreparingDuration.Observe(duration)
-}
-
-func newTotalCreatedArchives(serviceName string) prometheus.Counter {
-	return prometheus.NewCounter(
-		prometheus.CounterOpts{
-			Namespace: serviceName,
-			Name:      "total_created_archives",
-			Help:      "A counter displaying the total number of created canvas archives.",
-		},
-	)
-}
-
-func (c *canvasImpl) IncreaseTotalCreatedArchives() {
-	c.canvasesTotalCreatedArchives.Inc()
-}
-
-func newArchivingDuration(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "archiving_duration_seconds",
-			Help:      "A histogram displaying the duration of archiving for each canvas in seconds.",
-			Buckets:   common.DefaultDurationBuckets,
-		},
-	)
-}
-
-func (c *canvasImpl) RecordArchivingDuration(duration float64) {
-	c.canvasesArchivingDuration.Observe(duration)
-}
-
-func newArchiveSize(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "archive_size_bytes",
-			Help:      "A histogram displaying the size of each canvas archive in bytes.",
-			Buckets:   common.DefaultSizeBuckets,
-		},
-	)
-}
-
-func (c *canvasImpl) RecordArchiveSize(size float64) {
-	c.canvasesArchiveSize.Observe(size)
-}
-
-func newUploadingDuration(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "uploading_duration_seconds",
-			Help:      "A histogram displaying the duration of uploading for each canvas in seconds.",
-			Buckets:   common.DefaultDurationBuckets,
-		},
-	)
-}
-
-func (c *canvasImpl) RecordUploadingDuration(duration float64) {
-	c.canvasesUploadingDuration.Observe(duration)
-}
+func (c *canvasImpl) List() []prometheus.Collector             { return []prometheus.Collector{} }
+func (c *canvasImpl) RecordCanvasImageSize(size float64)       {}
+func (c *canvasImpl) IncreaseTotalSavedImages()                {}
+func (c *canvasImpl) RecordImagesPerCanvas(number float64)     {}
+func (c *canvasImpl) RecordCanvasesPerSession(number float64)  {}
+func (c *canvasImpl) RecordPreparingDuration(duration float64) {}
+func (c *canvasImpl) IncreaseTotalCreatedArchives()            {}
+func (c *canvasImpl) RecordArchivingDuration(duration float64) {}
+func (c *canvasImpl) RecordArchiveSize(size float64)           {}
+func (c *canvasImpl) RecordUploadingDuration(duration float64) {}

backend/pkg/metrics/database/metrics.go

@@ -2,141 +2,32 @@ package database
 
 import (
 	"github.com/prometheus/client_golang/prometheus"
-	"openreplay/backend/pkg/metrics/common"
 )
 
-var dbBatchElements = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "db",
-		Name:      "batch_size_elements",
-		Help:      "A histogram displaying the number of SQL commands in each batch.",
-		Buckets:   common.DefaultBuckets,
-	},
-)
-
-func RecordBatchElements(number float64) {
-	dbBatchElements.Observe(number)
+type Database interface {
+	RecordBatchElements(number float64)
+	RecordBatchInsertDuration(durMillis float64)
+	RecordBulkSize(size float64, db, table string)
+	RecordBulkElements(size float64, db, table string)
+	RecordBulkInsertDuration(durMillis float64, db, table string)
+	RecordRequestDuration(durMillis float64, method, table string)
+	IncreaseTotalRequests(method, table string)
+	IncreaseRedisRequests(method, table string)
+	RecordRedisRequestDuration(durMillis float64, method, table string)
+	List() []prometheus.Collector
 }
 
-var dbBatchInsertDuration = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "db",
-		Name:      "batch_insert_duration_seconds",
-		Help:      "A histogram displaying the duration of batch inserts in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-)
+type databaseImpl struct{}
 
-func RecordBatchInsertDuration(durMillis float64) {
-	dbBatchInsertDuration.Observe(durMillis / 1000.0)
-}
+func New(serviceName string) Database { return &databaseImpl{} }
 
-var dbBulkSize = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "db",
-		Name:      "bulk_size_bytes",
-		Help:      "A histogram displaying the bulk size in bytes.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-	[]string{"db", "table"},
-)
-
-func RecordBulkSize(size float64, db, table string) {
-	dbBulkSize.WithLabelValues(db, table).Observe(size)
-}
-
-var dbBulkElements = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "db",
-		Name:      "bulk_size_elements",
-		Help:      "A histogram displaying the size of data set in each bulk.",
-		Buckets:   common.DefaultBuckets,
-	},
-	[]string{"db", "table"},
-)
-
-func RecordBulkElements(size float64, db, table string) {
-	dbBulkElements.WithLabelValues(db, table).Observe(size)
-}
-
-var dbBulkInsertDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "db",
-		Name:      "bulk_insert_duration_seconds",
-		Help:      "A histogram displaying the duration of bulk inserts in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"db", "table"},
-)
-
-func RecordBulkInsertDuration(durMillis float64, db, table string) {
-	dbBulkInsertDuration.WithLabelValues(db, table).Observe(durMillis / 1000.0)
-}
-
-var dbRequestDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "db",
-		Name:      "request_duration_seconds",
-		Help:      "A histogram displaying the duration of each sql request in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"method", "table"},
-)
-
-func RecordRequestDuration(durMillis float64, method, table string) {
-	dbRequestDuration.WithLabelValues(method, table).Observe(durMillis / 1000.0)
-}
-
-var dbTotalRequests = prometheus.NewCounterVec(
-	prometheus.CounterOpts{
-		Namespace: "db",
-		Name:      "requests_total",
-		Help:      "A counter showing the total number of all SQL requests.",
-	},
-	[]string{"method", "table"},
-)
-
-func IncreaseTotalRequests(method, table string) {
-	dbTotalRequests.WithLabelValues(method, table).Inc()
-}
-
-var cacheRedisRequests = prometheus.NewCounterVec(
-	prometheus.CounterOpts{
-		Namespace: "cache",
-		Name:      "redis_requests_total",
-		Help:      "A counter showing the total number of all Redis requests.",
-	},
-	[]string{"method", "table"},
-)
-
-func IncreaseRedisRequests(method, table string) {
-	cacheRedisRequests.WithLabelValues(method, table).Inc()
-}
-
-var cacheRedisRequestDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "cache",
-		Name:      "redis_request_duration_seconds",
-		Help:      "A histogram displaying the duration of each Redis request in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"method", "table"},
-)
-
-func RecordRedisRequestDuration(durMillis float64, method, table string) {
-	cacheRedisRequestDuration.WithLabelValues(method, table).Observe(durMillis / 1000.0)
-}
-
-func List() []prometheus.Collector {
-	return []prometheus.Collector{
-		dbBatchElements,
-		dbBatchInsertDuration,
-		dbBulkSize,
-		dbBulkElements,
-		dbBulkInsertDuration,
-		dbRequestDuration,
-		dbTotalRequests,
-		cacheRedisRequests,
-		cacheRedisRequestDuration,
-	}
-}
+func (d *databaseImpl) List() []prometheus.Collector                                       { return []prometheus.Collector{} }
+func (d *databaseImpl) RecordBatchElements(number float64)                                 {}
+func (d *databaseImpl) RecordBatchInsertDuration(durMillis float64)                        {}
+func (d *databaseImpl) RecordBulkSize(size float64, db, table string)                      {}
+func (d *databaseImpl) RecordBulkElements(size float64, db, table string)                  {}
+func (d *databaseImpl) RecordBulkInsertDuration(durMillis float64, db, table string)       {}
+func (d *databaseImpl) RecordRequestDuration(durMillis float64, method, table string)      {}
+func (d *databaseImpl) IncreaseTotalRequests(method, table string)                         {}
+func (d *databaseImpl) IncreaseRedisRequests(method, table string)                         {}
+func (d *databaseImpl) RecordRedisRequestDuration(durMillis float64, method, table string) {}

backend/pkg/metrics/ender/metrics.go

@@ -2,50 +2,20 @@ package ender
 
 import "github.com/prometheus/client_golang/prometheus"
 
-var enderActiveSessions = prometheus.NewGauge(
-	prometheus.GaugeOpts{
-		Namespace: "ender",
-		Name:      "sessions_active",
-		Help:      "A gauge displaying the number of active (live) sessions.",
-	},
-)
-
-func IncreaseActiveSessions() {
-	enderActiveSessions.Inc()
+type Ender interface {
+	IncreaseActiveSessions()
+	DecreaseActiveSessions()
+	IncreaseClosedSessions()
+	IncreaseTotalSessions()
+	List() []prometheus.Collector
 }
 
-func DecreaseActiveSessions() {
-	enderActiveSessions.Dec()
-}
+type enderImpl struct{}
 
-var enderClosedSessions = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "ender",
-		Name:      "sessions_closed",
-		Help:      "A counter displaying the number of closed sessions (sent SessionEnd).",
-	},
-)
+func New(serviceName string) Ender { return &enderImpl{} }
 
-func IncreaseClosedSessions() {
-	enderClosedSessions.Inc()
-}
-
-var enderTotalSessions = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "ender",
-		Name:      "sessions_total",
-		Help:      "A counter displaying the number of all processed sessions.",
-	},
-)
-
-func IncreaseTotalSessions() {
-	enderTotalSessions.Inc()
-}
-
-func List() []prometheus.Collector {
-	return []prometheus.Collector{
-		enderActiveSessions,
-		enderClosedSessions,
-		enderTotalSessions,
-	}
-}
+func (e *enderImpl) List() []prometheus.Collector { return []prometheus.Collector{} }
+func (e *enderImpl) IncreaseActiveSessions()      {}
+func (e *enderImpl) DecreaseActiveSessions()      {}
+func (e *enderImpl) IncreaseClosedSessions()      {}
+func (e *enderImpl) IncreaseTotalSessions()       {}

backend/pkg/metrics/heuristics/metrics.go

@@ -2,65 +2,16 @@ package heuristics
 
 import (
 	"github.com/prometheus/client_golang/prometheus"
-	"openreplay/backend/pkg/metrics/common"
-	"strconv"
 )
 
-var heuristicsTotalEvents = prometheus.NewCounterVec(
-	prometheus.CounterOpts{
-		Namespace: "heuristics",
-		Name:      "events_total",
-		Help:      "A counter displaying the number of all processed events",
-	},
-	[]string{"type"},
-)
-
-func IncreaseTotalEvents(eventType string) {
-	heuristicsTotalEvents.WithLabelValues(eventType).Inc()
+type Heuristics interface {
+	IncreaseTotalEvents(eventType string)
+	List() []prometheus.Collector
 }
 
-var heuristicsRequestSize = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "heuristics",
-		Name:      "request_size_bytes",
-		Help:      "A histogram displaying the size of each HTTP request in bytes.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-	[]string{"url", "response_code"},
-)
+type heuristicsImpl struct{}
 
-func RecordRequestSize(size float64, url string, code int) {
-	heuristicsRequestSize.WithLabelValues(url, strconv.Itoa(code)).Observe(size)
-}
+func New(serviceName string) Heuristics { return &heuristicsImpl{} }
 
-var heuristicsRequestDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "heuristics",
-		Name:      "request_duration_seconds",
-		Help:      "A histogram displaying the duration of each HTTP request in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"url", "response_code"},
-)
-
-func RecordRequestDuration(durMillis float64, url string, code int) {
-	heuristicsRequestDuration.WithLabelValues(url, strconv.Itoa(code)).Observe(durMillis / 1000.0)
-}
-
-var heuristicsTotalRequests = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "heuristics",
-		Name:      "requests_total",
-		Help:      "A counter displaying the number all HTTP requests.",
-	},
-)
-
-func IncreaseTotalRequests() {
-	heuristicsTotalRequests.Inc()
-}
-
-func List() []prometheus.Collector {
-	return []prometheus.Collector{
-		heuristicsTotalEvents,
-	}
-}
+func (h *heuristicsImpl) List() []prometheus.Collector         { return []prometheus.Collector{} }
+func (h *heuristicsImpl) IncreaseTotalEvents(eventType string) {}

backend/pkg/metrics/images/metrics.go

@@ -2,7 +2,6 @@ package images
 
 import (
 	"github.com/prometheus/client_golang/prometheus"
-	"openreplay/backend/pkg/metrics/common"
 )
 
 type Images interface {
@@ -18,174 +17,17 @@ type Images interface {
 	List() []prometheus.Collector
 }
 
-type imagesImpl struct {
-	originalArchiveSize               prometheus.Histogram
-	originalArchiveExtractionDuration prometheus.Histogram
-	totalSavedArchives                prometheus.Counter
-	savingImageDuration               prometheus.Histogram
-	totalSavedImages                  prometheus.Counter
-	totalCreatedArchives              prometheus.Counter
-	archivingDuration                 prometheus.Histogram
-	archiveSize                       prometheus.Histogram
-	uploadingDuration                 prometheus.Histogram
-}
+type imagesImpl struct{}
 
-func New(serviceName string) Images {
-	return &imagesImpl{
-		originalArchiveSize:               newOriginalArchiveSize(serviceName),
-		originalArchiveExtractionDuration: newOriginalArchiveExtractionDuration(serviceName),
-		totalSavedArchives:                newTotalSavedArchives(serviceName),
-		savingImageDuration:               newSavingImageDuration(serviceName),
-		totalSavedImages:                  newTotalSavedImages(serviceName),
-		totalCreatedArchives:              newTotalCreatedArchives(serviceName),
-		archivingDuration:                 newArchivingDuration(serviceName),
-		archiveSize:                       newArchiveSize(serviceName),
-		uploadingDuration:                 newUploadingDuration(serviceName),
-	}
-}
+func New(serviceName string) Images { return &imagesImpl{} }
 
-func (i *imagesImpl) List() []prometheus.Collector {
-	return []prometheus.Collector{
-		i.originalArchiveSize,
-		i.originalArchiveExtractionDuration,
-		i.totalSavedArchives,
-		i.savingImageDuration,
-		i.totalSavedImages,
-		i.totalCreatedArchives,
-		i.archivingDuration,
-		i.archiveSize,
-		i.uploadingDuration,
-	}
-}
-
-func newOriginalArchiveSize(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "original_archive_size_bytes",
-			Help:      "A histogram displaying the original archive size in bytes.",
-			Buckets:   common.DefaultSizeBuckets,
-		},
-	)
-}
-
-func (i *imagesImpl) RecordOriginalArchiveSize(size float64) {
-	i.archiveSize.Observe(size)
-}
-
-func newOriginalArchiveExtractionDuration(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "original_archive_extraction_duration_seconds",
-			Help:      "A histogram displaying the duration of extracting the original archive.",
-			Buckets:   common.DefaultDurationBuckets,
-		},
-	)
-}
-
-func (i *imagesImpl) RecordOriginalArchiveExtractionDuration(duration float64) {
-	i.originalArchiveExtractionDuration.Observe(duration)
-}
-
-func newTotalSavedArchives(serviceName string) prometheus.Counter {
-	return prometheus.NewCounter(
-		prometheus.CounterOpts{
-			Namespace: serviceName,
-			Name:      "total_saved_archives",
-			Help:      "A counter displaying the total number of saved original archives.",
-		},
-	)
-}
-
-func (i *imagesImpl) IncreaseTotalSavedArchives() {
-	i.totalSavedArchives.Inc()
-}
-
-func newSavingImageDuration(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "saving_image_duration_seconds",
-			Help:      "A histogram displaying the duration of saving each image in seconds.",
-			Buckets:   common.DefaultDurationBuckets,
-		},
-	)
-}
-
-func (i *imagesImpl) RecordSavingImageDuration(duration float64) {
-	i.savingImageDuration.Observe(duration)
-}
-
-func newTotalSavedImages(serviceName string) prometheus.Counter {
-	return prometheus.NewCounter(
-		prometheus.CounterOpts{
-			Namespace: serviceName,
-			Name:      "total_saved_images",
-			Help:      "A counter displaying the total number of saved images.",
-		},
-	)
-}
-
-func (i *imagesImpl) IncreaseTotalSavedImages() {
-	i.totalSavedImages.Inc()
-}
-
-func newTotalCreatedArchives(serviceName string) prometheus.Counter {
-	return prometheus.NewCounter(
-		prometheus.CounterOpts{
-			Namespace: serviceName,
-			Name:      "total_created_archives",
-			Help:      "A counter displaying the total number of created archives.",
-		},
-	)
-}
-
-func (i *imagesImpl) IncreaseTotalCreatedArchives() {
-	i.totalCreatedArchives.Inc()
-}
-
-func newArchivingDuration(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "archiving_duration_seconds",
-			Help:      "A histogram displaying the duration of archiving each session in seconds.",
-			Buckets:   common.DefaultDurationBuckets,
-		},
-	)
-}
-
-func (i *imagesImpl) RecordArchivingDuration(duration float64) {
-	i.archivingDuration.Observe(duration)
-}
-
-func newArchiveSize(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "archive_size_bytes",
-			Help:      "A histogram displaying the session's archive size in bytes.",
-			Buckets:   common.DefaultSizeBuckets,
-		},
-	)
-}
-
-func (i *imagesImpl) RecordArchiveSize(size float64) {
-	i.archiveSize.Observe(size)
-}
-
-func newUploadingDuration(serviceName string) prometheus.Histogram {
-	return prometheus.NewHistogram(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "uploading_duration_seconds",
-			Help:      "A histogram displaying the duration of uploading each session's archive to S3 in seconds.",
-			Buckets:   common.DefaultDurationBuckets,
-		},
-	)
-}
-
-func (i *imagesImpl) RecordUploadingDuration(duration float64) {
-	i.uploadingDuration.Observe(duration)
-}
+func (i *imagesImpl) List() []prometheus.Collector                             { return []prometheus.Collector{} }
+func (i *imagesImpl) RecordOriginalArchiveSize(size float64)                   {}
+func (i *imagesImpl) RecordOriginalArchiveExtractionDuration(duration float64) {}
+func (i *imagesImpl) IncreaseTotalSavedArchives()                              {}
+func (i *imagesImpl) RecordSavingImageDuration(duration float64)               {}
+func (i *imagesImpl) IncreaseTotalSavedImages()                                {}
+func (i *imagesImpl) IncreaseTotalCreatedArchives()                            {}
+func (i *imagesImpl) RecordArchivingDuration(duration float64)                 {}
+func (i *imagesImpl) RecordArchiveSize(size float64)                           {}
+func (i *imagesImpl) RecordUploadingDuration(duration float64)                 {}

backend/pkg/metrics/server.go

@@ -1,38 +1,10 @@
 package metrics
 
 import (
-	"context"
-	"net/http"
-
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/collectors"
-	"github.com/prometheus/client_golang/prometheus/promhttp"
-
 	"openreplay/backend/pkg/logger"
 )
 
-type MetricServer struct {
-	registry *prometheus.Registry
-}
+type MetricServer struct{}
 
-func New(log logger.Logger, cs []prometheus.Collector) {
-	registry := prometheus.NewRegistry()
-	// Add go runtime metrics and process collectors.
-	registry.MustRegister(
-		collectors.NewGoCollector(),
-		collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}),
-	)
-	// Add extra metrics
-	registry.MustRegister(cs...)
-	// Expose /metrics HTTP endpoint using the created custom registry.
-	http.Handle(
-		"/metrics", promhttp.HandlerFor(
-			registry,
-			promhttp.HandlerOpts{
-				EnableOpenMetrics: true,
-			}),
-	)
-	go func() {
-		log.Error(context.Background(), "%v", http.ListenAndServe(":8888", nil))
-	}()
-}
+func New(log logger.Logger, cs []prometheus.Collector) {}

backend/pkg/metrics/sink/metrics.go

@@ -2,184 +2,40 @@ package sink
 
 import (
 	"github.com/prometheus/client_golang/prometheus"
-	"openreplay/backend/pkg/metrics/common"
 )
 
-var sinkMessageSize = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "sink",
-		Name:      "message_size_bytes",
-		Help:      "A histogram displaying the size of each message in bytes.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-)
-
-func RecordMessageSize(size float64) {
-	sinkMessageSize.Observe(size)
+type Sink interface {
+	RecordMessageSize(size float64)
+	IncreaseWrittenMessages()
+	IncreaseTotalMessages()
+	RecordBatchSize(size float64)
+	IncreaseTotalBatches()
+	RecordWrittenBytes(size float64, fileType string)
+	IncreaseTotalWrittenBytes(size float64, fileType string)
+	IncreaseCachedAssets()
+	DecreaseCachedAssets()
+	IncreaseSkippedAssets()
+	IncreaseTotalAssets()
+	RecordAssetSize(size float64)
+	RecordProcessAssetDuration(durMillis float64)
+	List() []prometheus.Collector
 }
 
-var sinkWrittenMessages = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "sink",
-		Name:      "messages_written",
-		Help:      "A counter displaying the total number of all written messages.",
-	},
-)
+type sinkImpl struct{}
 
-func IncreaseWrittenMessages() {
-	sinkWrittenMessages.Inc()
-}
+func New(serviceName string) Sink { return &sinkImpl{} }
 
-var sinkTotalMessages = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "sink",
-		Name:      "messages_total",
-		Help:      "A counter displaying the total number of all processed messages.",
-	},
-)
-
-func IncreaseTotalMessages() {
-	sinkTotalMessages.Inc()
-}
-
-var sinkBatchSize = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "sink",
-		Name:      "batch_size_bytes",
-		Help:      "A histogram displaying the size of each batch in bytes.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-)
-
-func RecordBatchSize(size float64) {
-	sinkBatchSize.Observe(size)
-}
-
-var sinkTotalBatches = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "sink",
-		Name:      "batches_total",
-		Help:      "A counter displaying the total number of all written batches.",
-	},
-)
-
-func IncreaseTotalBatches() {
-	sinkTotalBatches.Inc()
-}
-
-var sinkWrittenBytes = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "sink",
-		Name:      "written_bytes",
-		Help:      "A histogram displaying the size of buffer in bytes written to session file.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordWrittenBytes(size float64, fileType string) {
-	if size == 0 {
-		return
-	}
-	sinkWrittenBytes.WithLabelValues(fileType).Observe(size)
-	IncreaseTotalWrittenBytes(size, fileType)
-}
-
-var sinkTotalWrittenBytes = prometheus.NewCounterVec(
-	prometheus.CounterOpts{
-		Namespace: "sink",
-		Name:      "written_bytes_total",
-		Help:      "A counter displaying the total number of bytes written to all session files.",
-	},
-	[]string{"file_type"},
-)
-
-func IncreaseTotalWrittenBytes(size float64, fileType string) {
-	if size == 0 {
-		return
-	}
-	sinkTotalWrittenBytes.WithLabelValues(fileType).Add(size)
-}
-
-var sinkCachedAssets = prometheus.NewGauge(
-	prometheus.GaugeOpts{
-		Namespace: "sink",
-		Name:      "assets_cached",
-		Help:      "A gauge displaying the current number of cached assets.",
-	},
-)
-
-func IncreaseCachedAssets() {
-	sinkCachedAssets.Inc()
-}
-
-func DecreaseCachedAssets() {
-	sinkCachedAssets.Dec()
-}
-
-var sinkSkippedAssets = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "sink",
-		Name:      "assets_skipped",
-		Help:      "A counter displaying the total number of all skipped assets.",
-	},
-)
-
-func IncreaseSkippedAssets() {
-	sinkSkippedAssets.Inc()
-}
-
-var sinkTotalAssets = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "sink",
-		Name:      "assets_total",
-		Help:      "A counter displaying the total number of all processed assets.",
-	},
-)
-
-func IncreaseTotalAssets() {
-	sinkTotalAssets.Inc()
-}
-
-var sinkAssetSize = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "sink",
-		Name:      "asset_size_bytes",
-		Help:      "A histogram displaying the size of each asset in bytes.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-)
-
-func RecordAssetSize(size float64) {
-	sinkAssetSize.Observe(size)
-}
-
-var sinkProcessAssetDuration = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "sink",
-		Name:      "asset_process_duration_seconds",
-		Help:      "A histogram displaying the duration of processing for each asset in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-)
-
-func RecordProcessAssetDuration(durMillis float64) {
-	sinkProcessAssetDuration.Observe(durMillis / 1000.0)
-}
-
-func List() []prometheus.Collector {
-	return []prometheus.Collector{
-		sinkMessageSize,
-		sinkWrittenMessages,
-		sinkTotalMessages,
-		sinkBatchSize,
-		sinkTotalBatches,
-		sinkWrittenBytes,
-		sinkTotalWrittenBytes,
-		sinkCachedAssets,
-		sinkSkippedAssets,
-		sinkTotalAssets,
-		sinkAssetSize,
-		sinkProcessAssetDuration,
-	}
-}
+func (s *sinkImpl) List() []prometheus.Collector                            { return []prometheus.Collector{} }
+func (s *sinkImpl) RecordMessageSize(size float64)                          {}
+func (s *sinkImpl) IncreaseWrittenMessages()                                {}
+func (s *sinkImpl) IncreaseTotalMessages()                                  {}
+func (s *sinkImpl) RecordBatchSize(size float64)                            {}
+func (s *sinkImpl) IncreaseTotalBatches()                                   {}
+func (s *sinkImpl) RecordWrittenBytes(size float64, fileType string)        {}
+func (s *sinkImpl) IncreaseTotalWrittenBytes(size float64, fileType string) {}
+func (s *sinkImpl) IncreaseCachedAssets()                                   {}
+func (s *sinkImpl) DecreaseCachedAssets()                                   {}
+func (s *sinkImpl) IncreaseSkippedAssets()                                  {}
+func (s *sinkImpl) IncreaseTotalAssets()                                    {}
+func (s *sinkImpl) RecordAssetSize(size float64)                            {}
+func (s *sinkImpl) RecordProcessAssetDuration(durMillis float64)            {}

backend/pkg/metrics/spot/spot.go

@@ -2,148 +2,34 @@ package spot
 
 import (
 	"github.com/prometheus/client_golang/prometheus"
-
-	"openreplay/backend/pkg/metrics/common"
 )
 
-var spotOriginalVideoSize = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "spot",
-		Name:      "original_video_size_bytes",
-		Help:      "A histogram displaying the size of each original video in bytes.",
-		Buckets:   common.VideoSizeBuckets,
-	},
-)
-
-func RecordOriginalVideoSize(size float64) {
-	spotOriginalVideoSize.Observe(size)
+type Spot interface {
+	RecordOriginalVideoSize(size float64)
+	RecordCroppedVideoSize(size float64)
+	IncreaseVideosTotal()
+	IncreaseVideosCropped()
+	IncreaseVideosTranscoded()
+	RecordOriginalVideoDownloadDuration(durMillis float64)
+	RecordCroppingDuration(durMillis float64)
+	RecordCroppedVideoUploadDuration(durMillis float64)
+	RecordTranscodingDuration(durMillis float64)
+	RecordTranscodedVideoUploadDuration(durMillis float64)
+	List() []prometheus.Collector
 }
 
-var spotCroppedVideoSize = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "spot",
-		Name:      "cropped_video_size_bytes",
-		Help:      "A histogram displaying the size of each cropped video in bytes.",
-		Buckets:   common.VideoSizeBuckets,
-	},
-)
+type spotImpl struct{}
 
-func RecordCroppedVideoSize(size float64) {
-	spotCroppedVideoSize.Observe(size)
-}
+func New(serviceName string) Spot { return &spotImpl{} }
 
-var spotVideosTotal = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "spot",
-		Name:      "videos_total",
-		Help:      "A counter displaying the total number of all processed videos.",
-	},
-)
-
-func IncreaseVideosTotal() {
-	spotVideosTotal.Inc()
-}
-
-var spotVideosCropped = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "spot",
-		Name:      "videos_cropped_total",
-		Help:      "A counter displaying the total number of all cropped videos.",
-	},
-)
-
-func IncreaseVideosCropped() {
-	spotVideosCropped.Inc()
-}
-
-var spotVideosTranscoded = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "spot",
-		Name:      "videos_transcoded_total",
-		Help:      "A counter displaying the total number of all transcoded videos.",
-	},
-)
-
-func IncreaseVideosTranscoded() {
-	spotVideosTranscoded.Inc()
-}
-
-var spotOriginalVideoDownloadDuration = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "spot",
-		Name:      "original_video_download_duration_seconds",
-		Help:      "A histogram displaying the duration of downloading each original video in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-)
-
-func RecordOriginalVideoDownloadDuration(durMillis float64) {
-	spotOriginalVideoDownloadDuration.Observe(durMillis / 1000.0)
-}
-
-var spotCroppingDuration = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "spot",
-		Name:      "cropping_duration_seconds",
-		Help:      "A histogram displaying the duration of cropping each video in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-)
-
-func RecordCroppingDuration(durMillis float64) {
-	spotCroppingDuration.Observe(durMillis / 1000.0)
-}
-
-var spotCroppedVideoUploadDuration = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "spot",
-		Name:      "cropped_video_upload_duration_seconds",
-		Help:      "A histogram displaying the duration of uploading each cropped video in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-)
-
-func RecordCroppedVideoUploadDuration(durMillis float64) {
-	spotCroppedVideoUploadDuration.Observe(durMillis / 1000.0)
-}
-
-var spotTranscodingDuration = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "spot",
-		Name:      "transcoding_duration_seconds",
-		Help:      "A histogram displaying the duration of transcoding each video in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-)
-
-func RecordTranscodingDuration(durMillis float64) {
-	spotTranscodingDuration.Observe(durMillis / 1000.0)
-}
-
-var spotTranscodedVideoUploadDuration = prometheus.NewHistogram(
-	prometheus.HistogramOpts{
-		Namespace: "spot",
-		Name:      "transcoded_video_upload_duration_seconds",
-		Help:      "A histogram displaying the duration of uploading each transcoded video in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-)
-
-func RecordTranscodedVideoUploadDuration(durMillis float64) {
-	spotTranscodedVideoUploadDuration.Observe(durMillis / 1000.0)
-}
-
-func List() []prometheus.Collector {
-	return []prometheus.Collector{
-		spotOriginalVideoSize,
-		spotCroppedVideoSize,
-		spotVideosTotal,
-		spotVideosCropped,
-		spotVideosTranscoded,
-		spotOriginalVideoDownloadDuration,
-		spotCroppingDuration,
-		spotCroppedVideoUploadDuration,
-		spotTranscodingDuration,
-		spotTranscodedVideoUploadDuration,
-	}
-}
+func (s *spotImpl) List() []prometheus.Collector                          { return []prometheus.Collector{} }
+func (s *spotImpl) RecordOriginalVideoSize(size float64)                  {}
+func (s *spotImpl) RecordCroppedVideoSize(size float64)                   {}
+func (s *spotImpl) IncreaseVideosTotal()                                  {}
+func (s *spotImpl) IncreaseVideosCropped()                                {}
+func (s *spotImpl) IncreaseVideosTranscoded()                             {}
+func (s *spotImpl) RecordOriginalVideoDownloadDuration(durMillis float64) {}
+func (s *spotImpl) RecordCroppingDuration(durMillis float64)              {}
+func (s *spotImpl) RecordCroppedVideoUploadDuration(durMillis float64)    {}
+func (s *spotImpl) RecordTranscodingDuration(durMillis float64)           {}
+func (s *spotImpl) RecordTranscodedVideoUploadDuration(durMillis float64) {}

backend/pkg/metrics/storage/metrics.go

@@ -2,154 +2,34 @@ package storage
 
 import (
 	"github.com/prometheus/client_golang/prometheus"
-	"openreplay/backend/pkg/metrics/common"
 )
 
-var storageSessionSize = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "session_size_bytes",
-		Help:      "A histogram displaying the size of each session file in bytes prior to any manipulation.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionSize(fileSize float64, fileType string) {
-	storageSessionSize.WithLabelValues(fileType).Observe(fileSize)
+type Storage interface {
+	RecordSessionSize(fileSize float64, fileType string)
+	IncreaseStorageTotalSessions()
+	RecordSkippedSessionSize(fileSize float64, fileType string)
+	IncreaseStorageTotalSkippedSessions()
+	RecordSessionReadDuration(durMillis float64, fileType string)
+	RecordSessionSortDuration(durMillis float64, fileType string)
+	RecordSessionEncryptionDuration(durMillis float64, fileType string)
+	RecordSessionCompressDuration(durMillis float64, fileType string)
+	RecordSessionUploadDuration(durMillis float64, fileType string)
+	RecordSessionCompressionRatio(ratio float64, fileType string)
+	List() []prometheus.Collector
 }
 
-var storageTotalSessions = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "storage",
-		Name:      "sessions_total",
-		Help:      "A counter displaying the total number of all processed sessions.",
-	},
-)
+type storageImpl struct{}
 
-func IncreaseStorageTotalSessions() {
-	storageTotalSessions.Inc()
-}
+func New(serviceName string) Storage { return &storageImpl{} }
 
-var storageSkippedSessionSize = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "session_size_bytes",
-		Help:      "A histogram displaying the size of each skipped session file in bytes.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSkippedSessionSize(fileSize float64, fileType string) {
-	storageSkippedSessionSize.WithLabelValues(fileType).Observe(fileSize)
-}
-
-var storageTotalSkippedSessions = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "storage",
-		Name:      "sessions_skipped_total",
-		Help:      "A counter displaying the total number of all skipped sessions because of the size limits.",
-	},
-)
-
-func IncreaseStorageTotalSkippedSessions() {
-	storageTotalSkippedSessions.Inc()
-}
-
-var storageSessionReadDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "read_duration_seconds",
-		Help:      "A histogram displaying the duration of reading for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionReadDuration(durMillis float64, fileType string) {
-	storageSessionReadDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionSortDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "sort_duration_seconds",
-		Help:      "A histogram displaying the duration of sorting for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionSortDuration(durMillis float64, fileType string) {
-	storageSessionSortDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionEncryptionDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "encryption_duration_seconds",
-		Help:      "A histogram displaying the duration of encoding for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionEncryptionDuration(durMillis float64, fileType string) {
-	storageSessionEncryptionDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionCompressDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "compress_duration_seconds",
-		Help:      "A histogram displaying the duration of compressing for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionCompressDuration(durMillis float64, fileType string) {
-	storageSessionCompressDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionUploadDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "upload_duration_seconds",
-		Help:      "A histogram displaying the duration of uploading to s3 for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionUploadDuration(durMillis float64, fileType string) {
-	storageSessionUploadDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionCompressionRatio = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "compression_ratio",
-		Help:      "A histogram displaying the compression ratio of mob files for each session.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionCompressionRatio(ratio float64, fileType string) {
-	storageSessionCompressionRatio.WithLabelValues(fileType).Observe(ratio)
-}
-
-func List() []prometheus.Collector {
-	return []prometheus.Collector{
-		storageSessionSize,
-		storageTotalSessions,
-		storageSessionReadDuration,
-		storageSessionSortDuration,
-		storageSessionEncryptionDuration,
-		storageSessionCompressDuration,
-		storageSessionUploadDuration,
-		storageSessionCompressionRatio,
-	}
-}
+func (s *storageImpl) List() []prometheus.Collector                                       { return []prometheus.Collector{} }
+func (s *storageImpl) RecordSessionSize(fileSize float64, fileType string)                {}
+func (s *storageImpl) IncreaseStorageTotalSessions()                                      {}
+func (s *storageImpl) RecordSkippedSessionSize(fileSize float64, fileType string)         {}
+func (s *storageImpl) IncreaseStorageTotalSkippedSessions()                               {}
+func (s *storageImpl) RecordSessionReadDuration(durMillis float64, fileType string)       {}
+func (s *storageImpl) RecordSessionSortDuration(durMillis float64, fileType string)       {}
+func (s *storageImpl) RecordSessionEncryptionDuration(durMillis float64, fileType string) {}
+func (s *storageImpl) RecordSessionCompressDuration(durMillis float64, fileType string)   {}
+func (s *storageImpl) RecordSessionUploadDuration(durMillis float64, fileType string)     {}
+func (s *storageImpl) RecordSessionCompressionRatio(ratio float64, fileType string)       {}

backend/pkg/metrics/videostorage/metrics.go

@@ -1,155 +0,0 @@
-package videostorage
-
-import (
-	"github.com/prometheus/client_golang/prometheus"
-	"openreplay/backend/pkg/metrics/common"
-)
-
-var storageSessionSize = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "session_size_bytes",
-		Help:      "A histogram displaying the size of each session file in bytes prior to any manipulation.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionSize(fileSize float64, fileType string) {
-	storageSessionSize.WithLabelValues(fileType).Observe(fileSize)
-}
-
-var storageTotalSessions = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "storage",
-		Name:      "sessions_total",
-		Help:      "A counter displaying the total number of all processed sessions.",
-	},
-)
-
-func IncreaseStorageTotalSessions() {
-	storageTotalSessions.Inc()
-}
-
-var storageSkippedSessionSize = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "session_size_bytes",
-		Help:      "A histogram displaying the size of each skipped session file in bytes.",
-		Buckets:   common.DefaultSizeBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSkippedSessionSize(fileSize float64, fileType string) {
-	storageSkippedSessionSize.WithLabelValues(fileType).Observe(fileSize)
-}
-
-var storageTotalSkippedSessions = prometheus.NewCounter(
-	prometheus.CounterOpts{
-		Namespace: "storage",
-		Name:      "sessions_skipped_total",
-		Help:      "A counter displaying the total number of all skipped sessions because of the size limits.",
-	},
-)
-
-func IncreaseStorageTotalSkippedSessions() {
-	storageTotalSkippedSessions.Inc()
-}
-
-var storageSessionReadDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "read_duration_seconds",
-		Help:      "A histogram displaying the duration of reading for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionReadDuration(durMillis float64, fileType string) {
-	storageSessionReadDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionSortDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "sort_duration_seconds",
-		Help:      "A histogram displaying the duration of sorting for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionSortDuration(durMillis float64, fileType string) {
-	storageSessionSortDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionEncryptionDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "encryption_duration_seconds",
-		Help:      "A histogram displaying the duration of encoding for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionEncryptionDuration(durMillis float64, fileType string) {
-	storageSessionEncryptionDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionCompressDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "compress_duration_seconds",
-		Help:      "A histogram displaying the duration of compressing for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionCompressDuration(durMillis float64, fileType string) {
-	storageSessionCompressDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionUploadDuration = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "upload_duration_seconds",
-		Help:      "A histogram displaying the duration of uploading to s3 for each session in seconds.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionUploadDuration(durMillis float64, fileType string) {
-	storageSessionUploadDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
-}
-
-var storageSessionCompressionRatio = prometheus.NewHistogramVec(
-	prometheus.HistogramOpts{
-		Namespace: "storage",
-		Name:      "compression_ratio",
-		Help:      "A histogram displaying the compression ratio of mob files for each session.",
-		Buckets:   common.DefaultDurationBuckets,
-	},
-	[]string{"file_type"},
-)
-
-func RecordSessionCompressionRatio(ratio float64, fileType string) {
-	storageSessionCompressionRatio.WithLabelValues(fileType).Observe(ratio)
-}
-
-func List() []prometheus.Collector {
-	return []prometheus.Collector{
-		storageSessionSize,
-		storageTotalSessions,
-		storageSessionReadDuration,
-		storageSessionSortDuration,
-		storageSessionEncryptionDuration,
-		storageSessionCompressDuration,
-		storageSessionUploadDuration,
-		storageSessionCompressionRatio,
-	}
-}

backend/pkg/metrics/web/metrics.go

@@ -1,11 +1,7 @@
 package web
 
 import (
-	"strconv"
-
 	"github.com/prometheus/client_golang/prometheus"
-
-	"openreplay/backend/pkg/metrics/common"
 )
 
 type Web interface {
@@ -15,70 +11,11 @@ type Web interface {
 	List() []prometheus.Collector
 }
 
-type webImpl struct {
-	httpRequestSize     *prometheus.HistogramVec
-	httpRequestDuration *prometheus.HistogramVec
-	httpTotalRequests   prometheus.Counter
-}
+type webImpl struct{}
 
-func New(serviceName string) Web {
-	return &webImpl{
-		httpRequestSize:     newRequestSizeMetric(serviceName),
-		httpRequestDuration: newRequestDurationMetric(serviceName),
-		httpTotalRequests:   newTotalRequestsMetric(serviceName),
-	}
-}
+func New(serviceName string) Web { return &webImpl{} }
 
-func (w *webImpl) List() []prometheus.Collector {
-	return []prometheus.Collector{
-		w.httpRequestSize,
-		w.httpRequestDuration,
-		w.httpTotalRequests,
-	}
-}
-
-func newRequestSizeMetric(serviceName string) *prometheus.HistogramVec {
-	return prometheus.NewHistogramVec(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "request_size_bytes",
-			Help:      "A histogram displaying the size of each HTTP request in bytes.",
-			Buckets:   common.DefaultSizeBuckets,
-		},
-		[]string{"url", "response_code"},
-	)
-}
-
-func (w *webImpl) RecordRequestSize(size float64, url string, code int) {
-	w.httpRequestSize.WithLabelValues(url, strconv.Itoa(code)).Observe(size)
-}
-
-func newRequestDurationMetric(serviceName string) *prometheus.HistogramVec {
-	return prometheus.NewHistogramVec(
-		prometheus.HistogramOpts{
-			Namespace: serviceName,
-			Name:      "request_duration_seconds",
-			Help:      "A histogram displaying the duration of each HTTP request in seconds.",
-			Buckets:   common.DefaultDurationBuckets,
-		},
-		[]string{"url", "response_code"},
-	)
-}
-
-func (w *webImpl) RecordRequestDuration(durMillis float64, url string, code int) {
-	w.httpRequestDuration.WithLabelValues(url, strconv.Itoa(code)).Observe(durMillis / 1000.0)
-}
-
-func newTotalRequestsMetric(serviceName string) prometheus.Counter {
-	return prometheus.NewCounter(
-		prometheus.CounterOpts{
-			Namespace: serviceName,
-			Name:      "requests_total",
-			Help:      "A counter displaying the number all HTTP requests.",
-		},
-	)
-}
-
-func (w *webImpl) IncreaseTotalRequests() {
-	w.httpTotalRequests.Inc()
-}
+func (w *webImpl) List() []prometheus.Collector                                  { return []prometheus.Collector{} }
+func (w *webImpl) RecordRequestSize(size float64, url string, code int)          {}
+func (w *webImpl) RecordRequestDuration(durMillis float64, url string, code int) {}
+func (w *webImpl) IncreaseTotalRequests()                                        {}

backend/pkg/projects/cache.go

@@ -11,6 +11,8 @@ import (
 	"openreplay/backend/pkg/metrics/database"
 )
 
+var ErrDisabledCache = errors.New("cache is disabled")
+
 type Cache interface {
 	Set(project *Project) error
 	GetByID(projectID uint32) (*Project, error)
@@ -19,9 +21,15 @@ type Cache interface {
 
 type cacheImpl struct {
 	db      *redis.Client
+	metrics database.Database
 }
 
-var ErrDisabledCache = errors.New("cache is disabled")
+func NewCache(db *redis.Client, metrics database.Database) Cache {
+	return &cacheImpl{
+		db:      db,
+		metrics: metrics,
+	}
+}
 
 func (c *cacheImpl) Set(project *Project) error {
 	if c.db == nil {
@@ -38,8 +46,8 @@ func (c *cacheImpl) Set(project *Project) error {
 	if _, err = c.db.Redis.Set(fmt.Sprintf("project:key:%s", project.ProjectKey), projectBytes, time.Minute*10).Result(); err != nil {
 		return err
 	}
-	database.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "set", "project")
-	database.IncreaseRedisRequests("set", "project")
+	c.metrics.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "set", "project")
+	c.metrics.IncreaseRedisRequests("set", "project")
 	return nil
 }
 
@@ -52,8 +60,8 @@ func (c *cacheImpl) GetByID(projectID uint32) (*Project, error) {
 	if err != nil {
 		return nil, err
 	}
-	database.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "get", "project")
-	database.IncreaseRedisRequests("get", "project")
+	c.metrics.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "get", "project")
+	c.metrics.IncreaseRedisRequests("get", "project")
 	project := &Project{}
 	if err = json.Unmarshal([]byte(result), project); err != nil {
 		return nil, err
@@ -70,15 +78,11 @@ func (c *cacheImpl) GetByKey(projectKey string) (*Project, error) {
 	if err != nil {
 		return nil, err
 	}
-	database.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "get", "project")
-	database.IncreaseRedisRequests("get", "project")
+	c.metrics.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "get", "project")
+	c.metrics.IncreaseRedisRequests("get", "project")
 	project := &Project{}
 	if err = json.Unmarshal([]byte(result), project); err != nil {
 		return nil, err
 	}
 	return project, nil
 }
-
-func NewCache(db *redis.Client) Cache {
-	return &cacheImpl{db: db}
-}

backend/pkg/projects/projects.go

@@ -3,6 +3,7 @@ package projects
 import (
 	"context"
 	"errors"
+	"openreplay/backend/pkg/metrics/database"
 	"time"
 
 	"openreplay/backend/pkg/cache"
@@ -24,8 +25,8 @@ type projectsImpl struct {
 	projectsByKeys cache.Cache
 }
 
-func New(log logger.Logger, db pool.Pool, redis *redis.Client) Projects {
-	cl := NewCache(redis)
+func New(log logger.Logger, db pool.Pool, redis *redis.Client, metrics database.Database) Projects {
+	cl := NewCache(redis, metrics)
 	return &projectsImpl{
 		log:            log,
 		db:             db,

backend/pkg/server/tracer/tracer.go

@@ -2,6 +2,7 @@ package tracer
 
 import (
 	"net/http"
+	"openreplay/backend/pkg/metrics/database"
 
 	db "openreplay/backend/pkg/db/postgres/pool"
 	"openreplay/backend/pkg/logger"
@@ -14,7 +15,7 @@ type Tracer interface {
 
 type tracerImpl struct{}
 
-func NewTracer(log logger.Logger, conn db.Pool) (Tracer, error) {
+func NewTracer(log logger.Logger, conn db.Pool, metrics database.Database) (Tracer, error) {
 	return &tracerImpl{}, nil
 }
 

backend/pkg/sessions/redis.go

@@ -3,6 +3,7 @@ package sessions
 import (
 	"errors"
 	"openreplay/backend/pkg/db/redis"
+	"openreplay/backend/pkg/metrics/database"
 )
 
 type cacheImpl struct{}
@@ -25,6 +26,6 @@ func (c *cacheImpl) Get(sessionID uint64) (*Session, error) {
 
 var ErrDisabledCache = errors.New("cache is disabled")
 
-func NewCache(db *redis.Client) Cache {
+func NewCache(db *redis.Client, metrics database.Database) Cache {
 	return &cacheImpl{}
 }

backend/pkg/sessions/sessions.go

@@ -3,6 +3,7 @@ package sessions
 import (
 	"context"
 	"fmt"
+	"openreplay/backend/pkg/metrics/database"
 
 	"openreplay/backend/pkg/db/postgres/pool"
 	"openreplay/backend/pkg/db/redis"
@@ -38,12 +39,12 @@ type sessionsImpl struct {
 	projects projects.Projects
 }
 
-func New(log logger.Logger, db pool.Pool, proj projects.Projects, redis *redis.Client) Sessions {
+func New(log logger.Logger, db pool.Pool, proj projects.Projects, redis *redis.Client, metrics database.Database) Sessions {
 	return &sessionsImpl{
 		log:      log,
-		cache:    NewInMemoryCache(log, NewCache(redis)),
+		cache:    NewInMemoryCache(log, NewCache(redis, metrics)),
 		storage:  NewStorage(db),
-		updates:  NewSessionUpdates(log, db),
+		updates:  NewSessionUpdates(log, db, metrics),
 		projects: proj,
 	}
 }

backend/pkg/sessions/updates.go

@@ -27,13 +27,15 @@ type updatesImpl struct {
 	log     logger.Logger
 	db      pool.Pool
 	updates map[uint64]*sessionUpdate
+	metrics database.Database
 }
 
-func NewSessionUpdates(log logger.Logger, db pool.Pool) Updates {
+func NewSessionUpdates(log logger.Logger, db pool.Pool, metrics database.Database) Updates {
 	return &updatesImpl{
 		log:     log,
 		db:      db,
 		updates: make(map[uint64]*sessionUpdate),
+		metrics: metrics,
 	}
 }
 
@@ -94,7 +96,7 @@ func (u *updatesImpl) Commit() {
 		}
 	}
 	// Record batch size
-	database.RecordBatchElements(float64(b.Len()))
+	u.metrics.RecordBatchElements(float64(b.Len()))
 
 	start := time.Now()
 
@@ -121,7 +123,7 @@ func (u *updatesImpl) Commit() {
 			}
 		}
 	}
-	database.RecordBatchInsertDuration(float64(time.Now().Sub(start).Milliseconds()))
+	u.metrics.RecordBatchInsertDuration(float64(time.Now().Sub(start).Milliseconds()))
 	u.updates = make(map[uint64]*sessionUpdate)
 }
 

backend/pkg/spot/builder.go

@@ -1,12 +1,14 @@
 package spot
 
 import (
+	"openreplay/backend/pkg/metrics/database"
 	"time"
 
 	"openreplay/backend/internal/config/spot"
 	"openreplay/backend/pkg/db/postgres/pool"
 	"openreplay/backend/pkg/flakeid"
 	"openreplay/backend/pkg/logger"
+	spotMetrics "openreplay/backend/pkg/metrics/spot"
 	"openreplay/backend/pkg/metrics/web"
 	"openreplay/backend/pkg/objectstorage/store"
 	"openreplay/backend/pkg/server/api"
@@ -26,16 +28,16 @@ type ServicesBuilder struct {
 	SpotsAPI    api.Handlers
 }
 
-func NewServiceBuilder(log logger.Logger, cfg *spot.Config, webMetrics web.Web, pgconn pool.Pool, prefix string) (*ServicesBuilder, error) {
+func NewServiceBuilder(log logger.Logger, cfg *spot.Config, webMetrics web.Web, spotMetrics spotMetrics.Spot, dbMetrics database.Database, pgconn pool.Pool, prefix string) (*ServicesBuilder, error) {
 	objStore, err := store.NewStore(&cfg.ObjectsConfig)
 	if err != nil {
 		return nil, err
 	}
 	flaker := flakeid.NewFlaker(cfg.WorkerID)
 	spots := service.NewSpots(log, pgconn, flaker)
-	transcoder := transcoder.NewTranscoder(cfg, log, objStore, pgconn, spots)
+	transcoder := transcoder.NewTranscoder(cfg, log, objStore, pgconn, spots, spotMetrics)
 	keys := keys.NewKeys(log, pgconn)
-	auditrail, err := tracer.NewTracer(log, pgconn)
+	auditrail, err := tracer.NewTracer(log, pgconn, dbMetrics)
 	if err != nil {
 		return nil, err
 	}

backend/pkg/spot/transcoder/transcoder.go

@@ -16,7 +16,7 @@ import (
 	"openreplay/backend/internal/config/spot"
 	"openreplay/backend/pkg/db/postgres/pool"
 	"openreplay/backend/pkg/logger"
-	metrics "openreplay/backend/pkg/metrics/spot"
+	spotMetrics "openreplay/backend/pkg/metrics/spot"
 	"openreplay/backend/pkg/objectstorage"
 	workers "openreplay/backend/pkg/pool"
 	"openreplay/backend/pkg/spot/service"
@@ -39,9 +39,10 @@ type transcoderImpl struct {
 	spots            service.Spots
 	prepareWorkers   workers.WorkerPool
 	transcodeWorkers workers.WorkerPool
+	metrics          spotMetrics.Spot
 }
 
-func NewTranscoder(cfg *spot.Config, log logger.Logger, objStorage objectstorage.ObjectStorage, conn pool.Pool, spots service.Spots) Transcoder {
+func NewTranscoder(cfg *spot.Config, log logger.Logger, objStorage objectstorage.ObjectStorage, conn pool.Pool, spots service.Spots, metrics spotMetrics.Spot) Transcoder {
 	tnsc := &transcoderImpl{
 		cfg:        cfg,
 		log:        log,
@@ -114,7 +115,7 @@ func (t *transcoderImpl) doneTask(task *Task) {
 }
 
 func (t *transcoderImpl) process(task *Task) {
-	metrics.IncreaseVideosTotal()
+	t.metrics.IncreaseVideosTotal()
 	//spotID := task.SpotID
 	t.log.Info(context.Background(), "Processing spot %s", task.SpotID)
 
@@ -200,11 +201,11 @@ func (t *transcoderImpl) downloadSpotVideo(spotID uint64, path string) error {
 	if fileInfo, err := originVideo.Stat(); err != nil {
 		t.log.Error(context.Background(), "Failed to get file info: %v", err)
 	} else {
-		metrics.RecordOriginalVideoSize(float64(fileInfo.Size()))
+		t.metrics.RecordOriginalVideoSize(float64(fileInfo.Size()))
 	}
 	originVideo.Close()
 
-	metrics.RecordOriginalVideoDownloadDuration(time.Since(start).Seconds())
+	t.metrics.RecordOriginalVideoDownloadDuration(time.Since(start).Seconds())
 
 	t.log.Info(context.Background(), "Saved origin video to disk, spot: %d in %v sec", spotID, time.Since(start).Seconds())
 	return nil
@@ -227,8 +228,8 @@ func (t *transcoderImpl) cropSpotVideo(spotID uint64, crop []int, path string) e
 	if err != nil {
 		return fmt.Errorf("failed to execute command: %v, stderr: %v", err, stderr.String())
 	}
-	metrics.IncreaseVideosCropped()
-	metrics.RecordCroppingDuration(time.Since(start).Seconds())
+	t.metrics.IncreaseVideosCropped()
+	t.metrics.RecordCroppingDuration(time.Since(start).Seconds())
 
 	t.log.Info(context.Background(), "Cropped spot %d in %v", spotID, time.Since(start).Seconds())
 
@@ -246,7 +247,7 @@ func (t *transcoderImpl) cropSpotVideo(spotID uint64, crop []int, path string) e
 	if fileInfo, err := video.Stat(); err != nil {
 		t.log.Error(context.Background(), "Failed to get file info: %v", err)
 	} else {
-		metrics.RecordCroppedVideoSize(float64(fileInfo.Size()))
+		t.metrics.RecordCroppedVideoSize(float64(fileInfo.Size()))
 	}
 
 	err = t.objStorage.Upload(video, fmt.Sprintf("%d/video.webm", spotID), "video/webm", objectstorage.NoContentEncoding, objectstorage.NoCompression)
@@ -254,7 +255,7 @@ func (t *transcoderImpl) cropSpotVideo(spotID uint64, crop []int, path string) e
 		return fmt.Errorf("failed to upload cropped video: %v", err)
 	}
 
-	metrics.RecordCroppedVideoUploadDuration(time.Since(start).Seconds())
+	t.metrics.RecordCroppedVideoUploadDuration(time.Since(start).Seconds())
 
 	t.log.Info(context.Background(), "Uploaded cropped spot %d in %v", spotID, time.Since(start).Seconds())
 	return nil
@@ -279,8 +280,8 @@ func (t *transcoderImpl) transcodeSpotVideo(spotID uint64, path string) (string,
 		t.log.Error(context.Background(), "Failed to execute command: %v, stderr: %v", err, stderr.String())
 		return "", err
 	}
-	metrics.IncreaseVideosTranscoded()
-	metrics.RecordTranscodingDuration(time.Since(start).Seconds())
+	t.metrics.IncreaseVideosTranscoded()
+	t.metrics.RecordTranscodingDuration(time.Since(start).Seconds())
 	t.log.Info(context.Background(), "Transcoded spot %d in %v", spotID, time.Since(start).Seconds())
 
 	start = time.Now()
@@ -327,7 +328,7 @@ func (t *transcoderImpl) transcodeSpotVideo(spotID uint64, path string) (string,
 			return "", err
 		}
 	}
-	metrics.RecordTranscodedVideoUploadDuration(time.Since(start).Seconds())
+	t.metrics.RecordTranscodedVideoUploadDuration(time.Since(start).Seconds())
 
 	t.log.Info(context.Background(), "Uploaded chunks for spot %d in %v", spotID, time.Since(start).Seconds())
 	return strings.Join(lines, "\n"), nil

ee/backend/pkg/metrics/assets/metrics.go

@@ -0,0 +1,106 @@
+package assets
+
+import (
+	"strconv"
+
+	"github.com/prometheus/client_golang/prometheus"
+
+	"openreplay/backend/pkg/metrics/common"
+)
+
+type Assets interface {
+	IncreaseProcessesSessions()
+	IncreaseSavedSessions()
+	RecordDownloadDuration(durMillis float64, code int)
+	RecordUploadDuration(durMillis float64, isFailed bool)
+	List() []prometheus.Collector
+}
+
+type assetsImpl struct {
+	assetsProcessedSessions prometheus.Counter
+	assetsSavedSessions     prometheus.Counter
+	assetsDownloadDuration  *prometheus.HistogramVec
+	assetsUploadDuration    *prometheus.HistogramVec
+}
+
+func New(serviceName string) Assets {
+	return &assetsImpl{
+		assetsProcessedSessions: newProcessedSessions(serviceName),
+		assetsSavedSessions:     newSavedSessions(serviceName),
+		assetsDownloadDuration:  newDownloadDuration(serviceName),
+		assetsUploadDuration:    newUploadDuration(serviceName),
+	}
+}
+
+func (a *assetsImpl) List() []prometheus.Collector {
+	return []prometheus.Collector{
+		a.assetsProcessedSessions,
+		a.assetsSavedSessions,
+		a.assetsDownloadDuration,
+		a.assetsUploadDuration,
+	}
+}
+
+func newProcessedSessions(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "processed_total",
+			Help:      "A counter displaying the total count of processed assets.",
+		},
+	)
+}
+
+func (a *assetsImpl) IncreaseProcessesSessions() {
+	a.assetsProcessedSessions.Inc()
+}
+
+func newSavedSessions(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "saved_total",
+			Help:      "A counter displaying the total number of cached assets.",
+		},
+	)
+}
+
+func (a *assetsImpl) IncreaseSavedSessions() {
+	a.assetsSavedSessions.Inc()
+}
+
+func newDownloadDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "download_duration_seconds",
+			Help:      "A histogram displaying the duration of downloading for each asset in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"response_code"},
+	)
+}
+
+func (a *assetsImpl) RecordDownloadDuration(durMillis float64, code int) {
+	a.assetsDownloadDuration.WithLabelValues(strconv.Itoa(code)).Observe(durMillis / 1000.0)
+}
+
+func newUploadDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "upload_s3_duration_seconds",
+			Help:      "A histogram displaying the duration of uploading to s3 for each asset in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"failed"},
+	)
+}
+
+func (a *assetsImpl) RecordUploadDuration(durMillis float64, isFailed bool) {
+	failed := "false"
+	if isFailed {
+		failed = "true"
+	}
+	a.assetsUploadDuration.WithLabelValues(failed).Observe(durMillis / 1000.0)
+}

ee/backend/pkg/metrics/canvas/metrics.go

@@ -0,0 +1,193 @@
+package canvas
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+
+	"openreplay/backend/pkg/metrics/common"
+)
+
+type Canvas interface {
+	RecordCanvasImageSize(size float64)
+	IncreaseTotalSavedImages()
+	RecordImagesPerCanvas(number float64)
+	RecordCanvasesPerSession(number float64)
+	RecordPreparingDuration(duration float64)
+	IncreaseTotalCreatedArchives()
+	RecordArchivingDuration(duration float64)
+	RecordArchiveSize(size float64)
+	RecordUploadingDuration(duration float64)
+	List() []prometheus.Collector
+}
+
+type canvasImpl struct {
+	canvasesImageSize            prometheus.Histogram
+	canvasesTotalSavedImages     prometheus.Counter
+	canvasesImagesPerCanvas      prometheus.Histogram
+	canvasesCanvasesPerSession   prometheus.Histogram
+	canvasesPreparingDuration    prometheus.Histogram
+	canvasesTotalCreatedArchives prometheus.Counter
+	canvasesArchivingDuration    prometheus.Histogram
+	canvasesArchiveSize          prometheus.Histogram
+	canvasesUploadingDuration    prometheus.Histogram
+}
+
+func New(serviceName string) Canvas {
+	return &canvasImpl{
+		canvasesImageSize:            newImageSizeMetric(serviceName),
+		canvasesTotalSavedImages:     newTotalSavedImages(serviceName),
+		canvasesImagesPerCanvas:      newImagesPerCanvas(serviceName),
+		canvasesCanvasesPerSession:   newCanvasesPerSession(serviceName),
+		canvasesPreparingDuration:    newPreparingDuration(serviceName),
+		canvasesTotalCreatedArchives: newTotalCreatedArchives(serviceName),
+		canvasesArchivingDuration:    newArchivingDuration(serviceName),
+		canvasesArchiveSize:          newArchiveSize(serviceName),
+		canvasesUploadingDuration:    newUploadingDuration(serviceName),
+	}
+}
+
+func (c *canvasImpl) List() []prometheus.Collector {
+	return []prometheus.Collector{
+		c.canvasesImageSize,
+		c.canvasesTotalSavedImages,
+		c.canvasesImagesPerCanvas,
+		c.canvasesCanvasesPerSession,
+		c.canvasesPreparingDuration,
+		c.canvasesTotalCreatedArchives,
+		c.canvasesArchivingDuration,
+		c.canvasesArchiveSize,
+		c.canvasesUploadingDuration,
+	}
+}
+
+func newImageSizeMetric(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "image_size_bytes",
+			Help:      "A histogram displaying the size of each canvas image in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+	)
+}
+
+func (c *canvasImpl) RecordCanvasImageSize(size float64) {
+	c.canvasesImageSize.Observe(size)
+}
+
+func newTotalSavedImages(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "total_saved_images",
+			Help:      "A counter displaying the total number of saved images.",
+		},
+	)
+}
+
+func (c *canvasImpl) IncreaseTotalSavedImages() {
+	c.canvasesTotalSavedImages.Inc()
+}
+
+func newImagesPerCanvas(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "images_per_canvas",
+			Help:      "A histogram displaying the number of images per canvas.",
+			Buckets:   common.DefaultBuckets,
+		},
+	)
+}
+
+func (c *canvasImpl) RecordImagesPerCanvas(number float64) {
+	c.canvasesImagesPerCanvas.Observe(number)
+}
+
+func newCanvasesPerSession(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "canvases_per_session",
+			Help:      "A histogram displaying the number of canvases per session.",
+			Buckets:   common.DefaultBuckets,
+		},
+	)
+}
+
+func (c *canvasImpl) RecordCanvasesPerSession(number float64) {
+	c.canvasesCanvasesPerSession.Observe(number)
+}
+
+func newPreparingDuration(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "preparing_duration_seconds",
+			Help:      "A histogram displaying the duration of preparing the list of canvases for each session in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+	)
+}
+
+func (c *canvasImpl) RecordPreparingDuration(duration float64) {
+	c.canvasesPreparingDuration.Observe(duration)
+}
+
+func newTotalCreatedArchives(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "total_created_archives",
+			Help:      "A counter displaying the total number of created canvas archives.",
+		},
+	)
+}
+
+func (c *canvasImpl) IncreaseTotalCreatedArchives() {
+	c.canvasesTotalCreatedArchives.Inc()
+}
+
+func newArchivingDuration(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "archiving_duration_seconds",
+			Help:      "A histogram displaying the duration of archiving for each canvas in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+	)
+}
+
+func (c *canvasImpl) RecordArchivingDuration(duration float64) {
+	c.canvasesArchivingDuration.Observe(duration)
+}
+
+func newArchiveSize(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "archive_size_bytes",
+			Help:      "A histogram displaying the size of each canvas archive in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+	)
+}
+
+func (c *canvasImpl) RecordArchiveSize(size float64) {
+	c.canvasesArchiveSize.Observe(size)
+}
+
+func newUploadingDuration(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "uploading_duration_seconds",
+			Help:      "A histogram displaying the duration of uploading for each canvas in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+	)
+}
+
+func (c *canvasImpl) RecordUploadingDuration(duration float64) {
+	c.canvasesUploadingDuration.Observe(duration)
+}

ee/backend/pkg/metrics/database/metrics.go

@@ -0,0 +1,200 @@
+package database
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+
+	"openreplay/backend/pkg/metrics/common"
+)
+
+type Database interface {
+	RecordBatchElements(number float64)
+	RecordBatchInsertDuration(durMillis float64)
+	RecordBulkSize(size float64, db, table string)
+	RecordBulkElements(size float64, db, table string)
+	RecordBulkInsertDuration(durMillis float64, db, table string)
+	RecordRequestDuration(durMillis float64, method, table string)
+	IncreaseTotalRequests(method, table string)
+	IncreaseRedisRequests(method, table string)
+	RecordRedisRequestDuration(durMillis float64, method, table string)
+	List() []prometheus.Collector
+}
+
+type databaseImpl struct {
+	dbBatchElements           prometheus.Histogram
+	dbBatchInsertDuration     prometheus.Histogram
+	dbBulkSize                *prometheus.HistogramVec
+	dbBulkElements            *prometheus.HistogramVec
+	dbBulkInsertDuration      *prometheus.HistogramVec
+	dbRequestDuration         *prometheus.HistogramVec
+	dbTotalRequests           *prometheus.CounterVec
+	cacheRedisRequests        *prometheus.CounterVec
+	cacheRedisRequestDuration *prometheus.HistogramVec
+}
+
+func New(serviceName string) Database {
+	return &databaseImpl{
+		dbBatchElements:           newBatchElements(serviceName),
+		dbBatchInsertDuration:     newBatchInsertDuration(serviceName),
+		dbBulkSize:                newBulkSize(serviceName),
+		dbBulkElements:            newBulkElements(serviceName),
+		dbBulkInsertDuration:      newBulkInsertDuration(serviceName),
+		dbRequestDuration:         newRequestDuration(serviceName),
+		dbTotalRequests:           newTotalRequests(serviceName),
+		cacheRedisRequests:        newRedisRequests(serviceName),
+		cacheRedisRequestDuration: newRedisRequestDuration(serviceName),
+	}
+}
+
+func (d *databaseImpl) List() []prometheus.Collector {
+	return []prometheus.Collector{
+		d.dbBatchElements,
+		d.dbBatchInsertDuration,
+		d.dbBulkSize,
+		d.dbBulkElements,
+		d.dbBulkInsertDuration,
+		d.dbRequestDuration,
+		d.dbTotalRequests,
+		d.cacheRedisRequests,
+		d.cacheRedisRequestDuration,
+	}
+}
+
+func newBatchElements(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "batch_size_elements",
+			Help:      "A histogram displaying the number of SQL commands in each batch.",
+			Buckets:   common.DefaultBuckets,
+		},
+	)
+}
+
+func (d *databaseImpl) RecordBatchElements(number float64) {
+	d.dbBatchElements.Observe(number)
+}
+
+func newBatchInsertDuration(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "batch_insert_duration_seconds",
+			Help:      "A histogram displaying the duration of batch inserts in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+	)
+}
+
+func (d *databaseImpl) RecordBatchInsertDuration(durMillis float64) {
+	d.dbBatchInsertDuration.Observe(durMillis / 1000.0)
+}
+
+func newBulkSize(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "bulk_size_bytes",
+			Help:      "A histogram displaying the bulk size in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+		[]string{"db", "table"},
+	)
+}
+
+func (d *databaseImpl) RecordBulkSize(size float64, db, table string) {
+	d.dbBulkSize.WithLabelValues(db, table).Observe(size)
+}
+
+func newBulkElements(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "bulk_size_elements",
+			Help:      "A histogram displaying the size of data set in each bulk.",
+			Buckets:   common.DefaultBuckets,
+		},
+		[]string{"db", "table"},
+	)
+}
+
+func (d *databaseImpl) RecordBulkElements(size float64, db, table string) {
+	d.dbBulkElements.WithLabelValues(db, table).Observe(size)
+}
+
+func newBulkInsertDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "bulk_insert_duration_seconds",
+			Help:      "A histogram displaying the duration of bulk inserts in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"db", "table"},
+	)
+}
+
+func (d *databaseImpl) RecordBulkInsertDuration(durMillis float64, db, table string) {
+	d.dbBulkInsertDuration.WithLabelValues(db, table).Observe(durMillis / 1000.0)
+}
+
+func newRequestDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "request_duration_seconds",
+			Help:      "A histogram displaying the duration of each sql request in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"method", "table"},
+	)
+}
+
+func (d *databaseImpl) RecordRequestDuration(durMillis float64, method, table string) {
+	d.dbRequestDuration.WithLabelValues(method, table).Observe(durMillis / 1000.0)
+}
+
+func newTotalRequests(serviceName string) *prometheus.CounterVec {
+	return prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "requests_total",
+			Help:      "A counter showing the total number of all SQL requests.",
+		},
+		[]string{"method", "table"},
+	)
+}
+
+func (d *databaseImpl) IncreaseTotalRequests(method, table string) {
+	d.dbTotalRequests.WithLabelValues(method, table).Inc()
+}
+
+func newRedisRequests(serviceName string) *prometheus.CounterVec {
+	return prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "redis_requests_total",
+			Help:      "A counter showing the total number of all Redis requests.",
+		},
+		[]string{"method", "table"},
+	)
+}
+
+func (d *databaseImpl) IncreaseRedisRequests(method, table string) {
+	d.cacheRedisRequests.WithLabelValues(method, table).Inc()
+}
+
+func newRedisRequestDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "redis_request_duration_seconds",
+			Help:      "A histogram displaying the duration of each Redis request in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"method", "table"},
+	)
+}
+
+func (d *databaseImpl) RecordRedisRequestDuration(durMillis float64, method, table string) {
+	d.cacheRedisRequestDuration.WithLabelValues(method, table).Observe(durMillis / 1000.0)
+}

ee/backend/pkg/metrics/ender/metrics.go

@@ -0,0 +1,79 @@
+package ender
+
+import "github.com/prometheus/client_golang/prometheus"
+
+type Ender interface {
+	IncreaseActiveSessions()
+	DecreaseActiveSessions()
+	IncreaseClosedSessions()
+	IncreaseTotalSessions()
+	List() []prometheus.Collector
+}
+
+type enderImpl struct {
+	activeSessions prometheus.Gauge
+	closedSessions prometheus.Counter
+	totalSessions  prometheus.Counter
+}
+
+func New(serviceName string) Ender {
+	return &enderImpl{
+		activeSessions: newActiveSessions(serviceName),
+		closedSessions: newClosedSessions(serviceName),
+		totalSessions:  newTotalSessions(serviceName),
+	}
+}
+
+func (e *enderImpl) List() []prometheus.Collector {
+	return []prometheus.Collector{
+		e.activeSessions,
+		e.closedSessions,
+		e.totalSessions,
+	}
+}
+
+func newActiveSessions(serviceName string) prometheus.Gauge {
+	return prometheus.NewGauge(
+		prometheus.GaugeOpts{
+			Namespace: serviceName,
+			Name:      "sessions_active",
+			Help:      "A gauge displaying the number of active (live) sessions.",
+		},
+	)
+}
+
+func (e *enderImpl) IncreaseActiveSessions() {
+	e.activeSessions.Inc()
+}
+
+func (e *enderImpl) DecreaseActiveSessions() {
+	e.activeSessions.Dec()
+}
+
+func newClosedSessions(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "sessions_closed",
+			Help:      "A counter displaying the number of closed sessions (sent SessionEnd).",
+		},
+	)
+}
+
+func (e *enderImpl) IncreaseClosedSessions() {
+	e.closedSessions.Inc()
+}
+
+func newTotalSessions(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "sessions_total",
+			Help:      "A counter displaying the number of all processed sessions.",
+		},
+	)
+}
+
+func (e *enderImpl) IncreaseTotalSessions() {
+	e.totalSessions.Inc()
+}

ee/backend/pkg/metrics/heuristics/metrics.go

@@ -0,0 +1,41 @@
+package heuristics
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type Heuristics interface {
+	IncreaseTotalEvents(eventType string)
+	List() []prometheus.Collector
+}
+
+type heuristicsImpl struct {
+	totalEvents *prometheus.CounterVec
+}
+
+func New(serviceName string) Heuristics {
+	return &heuristicsImpl{
+		totalEvents: newTotalEvents(serviceName),
+	}
+}
+
+func newTotalEvents(serviceName string) *prometheus.CounterVec {
+	return prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "events_total",
+			Help:      "A counter displaying the number of all processed events",
+		},
+		[]string{"type"},
+	)
+}
+
+func (h *heuristicsImpl) IncreaseTotalEvents(eventType string) {
+	h.totalEvents.WithLabelValues(eventType).Inc()
+}
+
+func (h *heuristicsImpl) List() []prometheus.Collector {
+	return []prometheus.Collector{
+		h.totalEvents,
+	}
+}

ee/backend/pkg/metrics/images/metrics.go

@@ -0,0 +1,192 @@
+package images
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+
+	"openreplay/backend/pkg/metrics/common"
+)
+
+type Images interface {
+	RecordOriginalArchiveSize(size float64)
+	RecordOriginalArchiveExtractionDuration(duration float64)
+	IncreaseTotalSavedArchives()
+	RecordSavingImageDuration(duration float64)
+	IncreaseTotalSavedImages()
+	IncreaseTotalCreatedArchives()
+	RecordArchivingDuration(duration float64)
+	RecordArchiveSize(size float64)
+	RecordUploadingDuration(duration float64)
+	List() []prometheus.Collector
+}
+
+type imagesImpl struct {
+	originalArchiveSize               prometheus.Histogram
+	originalArchiveExtractionDuration prometheus.Histogram
+	totalSavedArchives                prometheus.Counter
+	savingImageDuration               prometheus.Histogram
+	totalSavedImages                  prometheus.Counter
+	totalCreatedArchives              prometheus.Counter
+	archivingDuration                 prometheus.Histogram
+	archiveSize                       prometheus.Histogram
+	uploadingDuration                 prometheus.Histogram
+}
+
+func New(serviceName string) Images {
+	return &imagesImpl{
+		originalArchiveSize:               newOriginalArchiveSize(serviceName),
+		originalArchiveExtractionDuration: newOriginalArchiveExtractionDuration(serviceName),
+		totalSavedArchives:                newTotalSavedArchives(serviceName),
+		savingImageDuration:               newSavingImageDuration(serviceName),
+		totalSavedImages:                  newTotalSavedImages(serviceName),
+		totalCreatedArchives:              newTotalCreatedArchives(serviceName),
+		archivingDuration:                 newArchivingDuration(serviceName),
+		archiveSize:                       newArchiveSize(serviceName),
+		uploadingDuration:                 newUploadingDuration(serviceName),
+	}
+}
+
+func (i *imagesImpl) List() []prometheus.Collector {
+	return []prometheus.Collector{
+		i.originalArchiveSize,
+		i.originalArchiveExtractionDuration,
+		i.totalSavedArchives,
+		i.savingImageDuration,
+		i.totalSavedImages,
+		i.totalCreatedArchives,
+		i.archivingDuration,
+		i.archiveSize,
+		i.uploadingDuration,
+	}
+}
+
+func newOriginalArchiveSize(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "original_archive_size_bytes",
+			Help:      "A histogram displaying the original archive size in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+	)
+}
+
+func (i *imagesImpl) RecordOriginalArchiveSize(size float64) {
+	i.archiveSize.Observe(size)
+}
+
+func newOriginalArchiveExtractionDuration(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "original_archive_extraction_duration_seconds",
+			Help:      "A histogram displaying the duration of extracting the original archive.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+	)
+}
+
+func (i *imagesImpl) RecordOriginalArchiveExtractionDuration(duration float64) {
+	i.originalArchiveExtractionDuration.Observe(duration)
+}
+
+func newTotalSavedArchives(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "total_saved_archives",
+			Help:      "A counter displaying the total number of saved original archives.",
+		},
+	)
+}
+
+func (i *imagesImpl) IncreaseTotalSavedArchives() {
+	i.totalSavedArchives.Inc()
+}
+
+func newSavingImageDuration(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "saving_image_duration_seconds",
+			Help:      "A histogram displaying the duration of saving each image in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+	)
+}
+
+func (i *imagesImpl) RecordSavingImageDuration(duration float64) {
+	i.savingImageDuration.Observe(duration)
+}
+
+func newTotalSavedImages(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "total_saved_images",
+			Help:      "A counter displaying the total number of saved images.",
+		},
+	)
+}
+
+func (i *imagesImpl) IncreaseTotalSavedImages() {
+	i.totalSavedImages.Inc()
+}
+
+func newTotalCreatedArchives(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "total_created_archives",
+			Help:      "A counter displaying the total number of created archives.",
+		},
+	)
+}
+
+func (i *imagesImpl) IncreaseTotalCreatedArchives() {
+	i.totalCreatedArchives.Inc()
+}
+
+func newArchivingDuration(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "archiving_duration_seconds",
+			Help:      "A histogram displaying the duration of archiving each session in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+	)
+}
+
+func (i *imagesImpl) RecordArchivingDuration(duration float64) {
+	i.archivingDuration.Observe(duration)
+}
+
+func newArchiveSize(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "archive_size_bytes",
+			Help:      "A histogram displaying the session's archive size in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+	)
+}
+
+func (i *imagesImpl) RecordArchiveSize(size float64) {
+	i.archiveSize.Observe(size)
+}
+
+func newUploadingDuration(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "uploading_duration_seconds",
+			Help:      "A histogram displaying the duration of uploading each session's archive to S3 in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+	)
+}
+
+func (i *imagesImpl) RecordUploadingDuration(duration float64) {
+	i.uploadingDuration.Observe(duration)
+}

ee/backend/pkg/metrics/server.go

@@ -0,0 +1,38 @@
+package metrics
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+
+	"openreplay/backend/pkg/logger"
+)
+
+type MetricServer struct {
+	registry *prometheus.Registry
+}
+
+func New(log logger.Logger, cs []prometheus.Collector) {
+	registry := prometheus.NewRegistry()
+	// Add go runtime metrics and process collectors.
+	registry.MustRegister(
+		collectors.NewGoCollector(),
+		collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}),
+	)
+	// Add extra metrics
+	registry.MustRegister(cs...)
+	// Expose /metrics HTTP endpoint using the created custom registry.
+	http.Handle(
+		"/metrics", promhttp.HandlerFor(
+			registry,
+			promhttp.HandlerOpts{
+				EnableOpenMetrics: true,
+			}),
+	)
+	go func() {
+		log.Error(context.Background(), "%v", http.ListenAndServe(":8888", nil))
+	}()
+}

ee/backend/pkg/metrics/sink/metrics.go

@@ -0,0 +1,259 @@
+package sink
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+
+	"openreplay/backend/pkg/metrics/common"
+)
+
+type Sink interface {
+	RecordMessageSize(size float64)
+	IncreaseWrittenMessages()
+	IncreaseTotalMessages()
+	RecordBatchSize(size float64)
+	IncreaseTotalBatches()
+	RecordWrittenBytes(size float64, fileType string)
+	IncreaseTotalWrittenBytes(size float64, fileType string)
+	IncreaseCachedAssets()
+	DecreaseCachedAssets()
+	IncreaseSkippedAssets()
+	IncreaseTotalAssets()
+	RecordAssetSize(size float64)
+	RecordProcessAssetDuration(durMillis float64)
+	List() []prometheus.Collector
+}
+
+type sinkImpl struct {
+	messageSize          prometheus.Histogram
+	writtenMessages      prometheus.Counter
+	totalMessages        prometheus.Counter
+	batchSize            prometheus.Histogram
+	totalBatches         prometheus.Counter
+	writtenBytes         *prometheus.HistogramVec
+	totalWrittenBytes    *prometheus.CounterVec
+	cachedAssets         prometheus.Gauge
+	skippedAssets        prometheus.Counter
+	totalAssets          prometheus.Counter
+	assetSize            prometheus.Histogram
+	processAssetDuration prometheus.Histogram
+}
+
+func New(serviceName string) Sink {
+	return &sinkImpl{
+		messageSize:          newMessageSize(serviceName),
+		writtenMessages:      newWrittenMessages(serviceName),
+		totalMessages:        newTotalMessages(serviceName),
+		batchSize:            newBatchSize(serviceName),
+		totalBatches:         newTotalBatches(serviceName),
+		writtenBytes:         newWrittenBytes(serviceName),
+		totalWrittenBytes:    newTotalWrittenBytes(serviceName),
+		cachedAssets:         newCachedAssets(serviceName),
+		skippedAssets:        newSkippedAssets(serviceName),
+		totalAssets:          newTotalAssets(serviceName),
+		assetSize:            newAssetSize(serviceName),
+		processAssetDuration: newProcessAssetDuration(serviceName),
+	}
+}
+
+func (s *sinkImpl) List() []prometheus.Collector {
+	return []prometheus.Collector{
+		s.messageSize,
+		s.writtenMessages,
+		s.totalMessages,
+		s.batchSize,
+		s.totalBatches,
+		s.writtenBytes,
+		s.totalWrittenBytes,
+		s.cachedAssets,
+		s.skippedAssets,
+		s.totalAssets,
+		s.assetSize,
+		s.processAssetDuration,
+	}
+}
+
+func newMessageSize(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "message_size_bytes",
+			Help:      "A histogram displaying the size of each message in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+	)
+}
+
+func (s *sinkImpl) RecordMessageSize(size float64) {
+	s.messageSize.Observe(size)
+}
+
+func newWrittenMessages(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "messages_written",
+			Help:      "A counter displaying the total number of all written messages.",
+		},
+	)
+}
+
+func (s *sinkImpl) IncreaseWrittenMessages() {
+	s.writtenMessages.Inc()
+}
+
+func newTotalMessages(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "messages_total",
+			Help:      "A counter displaying the total number of all processed messages.",
+		},
+	)
+}
+
+func (s *sinkImpl) IncreaseTotalMessages() {
+	s.totalMessages.Inc()
+}
+
+func newBatchSize(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "batch_size_bytes",
+			Help:      "A histogram displaying the size of each batch in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+	)
+}
+
+func (s *sinkImpl) RecordBatchSize(size float64) {
+	s.batchSize.Observe(size)
+}
+
+func newTotalBatches(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "batches_total",
+			Help:      "A counter displaying the total number of all written batches.",
+		},
+	)
+}
+
+func (s *sinkImpl) IncreaseTotalBatches() {
+	s.totalBatches.Inc()
+}
+
+func newWrittenBytes(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "written_bytes",
+			Help:      "A histogram displaying the size of buffer in bytes written to session file.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *sinkImpl) RecordWrittenBytes(size float64, fileType string) {
+	if size == 0 {
+		return
+	}
+	s.writtenBytes.WithLabelValues(fileType).Observe(size)
+	s.IncreaseTotalWrittenBytes(size, fileType)
+}
+
+func newTotalWrittenBytes(serviceName string) *prometheus.CounterVec {
+	return prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "written_bytes_total",
+			Help:      "A counter displaying the total number of bytes written to all session files.",
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *sinkImpl) IncreaseTotalWrittenBytes(size float64, fileType string) {
+	if size == 0 {
+		return
+	}
+	s.totalWrittenBytes.WithLabelValues(fileType).Add(size)
+}
+
+func newCachedAssets(serviceName string) prometheus.Gauge {
+	return prometheus.NewGauge(
+		prometheus.GaugeOpts{
+			Namespace: serviceName,
+			Name:      "assets_cached",
+			Help:      "A gauge displaying the current number of cached assets.",
+		},
+	)
+}
+
+func (s *sinkImpl) IncreaseCachedAssets() {
+	s.cachedAssets.Inc()
+}
+
+func (s *sinkImpl) DecreaseCachedAssets() {
+	s.cachedAssets.Dec()
+}
+
+func newSkippedAssets(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "assets_skipped",
+			Help:      "A counter displaying the total number of all skipped assets.",
+		},
+	)
+}
+
+func (s *sinkImpl) IncreaseSkippedAssets() {
+	s.skippedAssets.Inc()
+}
+
+func newTotalAssets(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "assets_total",
+			Help:      "A counter displaying the total number of all processed assets.",
+		},
+	)
+}
+
+func (s *sinkImpl) IncreaseTotalAssets() {
+	s.totalAssets.Inc()
+}
+
+func newAssetSize(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "asset_size_bytes",
+			Help:      "A histogram displaying the size of each asset in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+	)
+}
+
+func (s *sinkImpl) RecordAssetSize(size float64) {
+	s.assetSize.Observe(size)
+}
+
+func newProcessAssetDuration(serviceName string) prometheus.Histogram {
+	return prometheus.NewHistogram(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "asset_process_duration_seconds",
+			Help:      "A histogram displaying the duration of processing for each asset in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+	)
+}
+
+func (s *sinkImpl) RecordProcessAssetDuration(durMillis float64) {
+	s.processAssetDuration.Observe(durMillis / 1000.0)
+}

ee/backend/pkg/metrics/storage/metrics.go

@@ -0,0 +1,219 @@
+package storage
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+
+	"openreplay/backend/pkg/metrics/common"
+)
+
+type Storage interface {
+	RecordSessionSize(fileSize float64, fileType string)
+	IncreaseStorageTotalSessions()
+	RecordSkippedSessionSize(fileSize float64, fileType string)
+	IncreaseStorageTotalSkippedSessions()
+	RecordSessionReadDuration(durMillis float64, fileType string)
+	RecordSessionSortDuration(durMillis float64, fileType string)
+	RecordSessionEncryptionDuration(durMillis float64, fileType string)
+	RecordSessionCompressDuration(durMillis float64, fileType string)
+	RecordSessionUploadDuration(durMillis float64, fileType string)
+	RecordSessionCompressionRatio(ratio float64, fileType string)
+	List() []prometheus.Collector
+}
+
+type storageImpl struct {
+	sessionSize               *prometheus.HistogramVec
+	totalSessions             prometheus.Counter
+	skippedSessionSize        *prometheus.HistogramVec
+	totalSkippedSessions      prometheus.Counter
+	sessionReadDuration       *prometheus.HistogramVec
+	sessionSortDuration       *prometheus.HistogramVec
+	sessionEncryptionDuration *prometheus.HistogramVec
+	sessionCompressDuration   *prometheus.HistogramVec
+	sessionUploadDuration     *prometheus.HistogramVec
+	sessionCompressionRatio   *prometheus.HistogramVec
+}
+
+func New(serviceName string) Storage {
+	return &storageImpl{
+		sessionSize:               newSessionSize(serviceName),
+		totalSessions:             newTotalSessions(serviceName),
+		skippedSessionSize:        newSkippedSessionSize(serviceName),
+		totalSkippedSessions:      newTotalSkippedSessions(serviceName),
+		sessionReadDuration:       newSessionReadDuration(serviceName),
+		sessionSortDuration:       newSessionSortDuration(serviceName),
+		sessionEncryptionDuration: newSessionEncryptionDuration(serviceName),
+		sessionCompressDuration:   newSessionCompressDuration(serviceName),
+		sessionUploadDuration:     newSessionUploadDuration(serviceName),
+		sessionCompressionRatio:   newSessionCompressionRatio(serviceName),
+	}
+}
+
+func (s *storageImpl) List() []prometheus.Collector {
+	return []prometheus.Collector{
+		s.sessionSize,
+		s.totalSessions,
+		s.skippedSessionSize,
+		s.sessionReadDuration,
+		s.sessionSortDuration,
+		s.sessionEncryptionDuration,
+		s.sessionCompressDuration,
+		s.sessionUploadDuration,
+		s.sessionCompressionRatio,
+	}
+}
+
+func newSessionSize(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "session_size_bytes",
+			Help:      "A histogram displaying the size of each session file in bytes prior to any manipulation.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *storageImpl) RecordSessionSize(fileSize float64, fileType string) {
+	s.sessionSize.WithLabelValues(fileType).Observe(fileSize)
+}
+
+func newTotalSessions(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "sessions_total",
+			Help:      "A counter displaying the total number of all processed sessions.",
+		},
+	)
+}
+
+func (s *storageImpl) IncreaseStorageTotalSessions() {
+	s.totalSessions.Inc()
+}
+
+func newSkippedSessionSize(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "skipped_session_size_bytes",
+			Help:      "A histogram displaying the size of each skipped session file in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *storageImpl) RecordSkippedSessionSize(fileSize float64, fileType string) {
+	s.skippedSessionSize.WithLabelValues(fileType).Observe(fileSize)
+}
+
+func newTotalSkippedSessions(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "sessions_skipped_total",
+			Help:      "A counter displaying the total number of all skipped sessions because of the size limits.",
+		},
+	)
+}
+
+func (s *storageImpl) IncreaseStorageTotalSkippedSessions() {
+	s.totalSkippedSessions.Inc()
+}
+
+func newSessionReadDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "read_duration_seconds",
+			Help:      "A histogram displaying the duration of reading for each session in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *storageImpl) RecordSessionReadDuration(durMillis float64, fileType string) {
+	s.sessionReadDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
+}
+
+func newSessionSortDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "sort_duration_seconds",
+			Help:      "A histogram displaying the duration of sorting for each session in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *storageImpl) RecordSessionSortDuration(durMillis float64, fileType string) {
+	s.sessionSortDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
+}
+
+func newSessionEncryptionDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "encryption_duration_seconds",
+			Help:      "A histogram displaying the duration of encoding for each session in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *storageImpl) RecordSessionEncryptionDuration(durMillis float64, fileType string) {
+	s.sessionEncryptionDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
+}
+
+func newSessionCompressDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "compress_duration_seconds",
+			Help:      "A histogram displaying the duration of compressing for each session in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *storageImpl) RecordSessionCompressDuration(durMillis float64, fileType string) {
+	s.sessionCompressDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
+}
+
+func newSessionUploadDuration(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "upload_duration_seconds",
+			Help:      "A histogram displaying the duration of uploading to s3 for each session in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *storageImpl) RecordSessionUploadDuration(durMillis float64, fileType string) {
+	s.sessionUploadDuration.WithLabelValues(fileType).Observe(durMillis / 1000.0)
+}
+
+func newSessionCompressionRatio(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "compression_ratio",
+			Help:      "A histogram displaying the compression ratio of mob files for each session.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"file_type"},
+	)
+}
+
+func (s *storageImpl) RecordSessionCompressionRatio(ratio float64, fileType string) {
+	s.sessionCompressionRatio.WithLabelValues(fileType).Observe(ratio)
+}

ee/backend/pkg/metrics/web/metrics.go

@@ -0,0 +1,84 @@
+package web
+
+import (
+	"strconv"
+
+	"github.com/prometheus/client_golang/prometheus"
+
+	"openreplay/backend/pkg/metrics/common"
+)
+
+type Web interface {
+	RecordRequestSize(size float64, url string, code int)
+	RecordRequestDuration(durMillis float64, url string, code int)
+	IncreaseTotalRequests()
+	List() []prometheus.Collector
+}
+
+type webImpl struct {
+	httpRequestSize     *prometheus.HistogramVec
+	httpRequestDuration *prometheus.HistogramVec
+	httpTotalRequests   prometheus.Counter
+}
+
+func New(serviceName string) Web {
+	return &webImpl{
+		httpRequestSize:     newRequestSizeMetric(serviceName),
+		httpRequestDuration: newRequestDurationMetric(serviceName),
+		httpTotalRequests:   newTotalRequestsMetric(serviceName),
+	}
+}
+
+func (w *webImpl) List() []prometheus.Collector {
+	return []prometheus.Collector{
+		w.httpRequestSize,
+		w.httpRequestDuration,
+		w.httpTotalRequests,
+	}
+}
+
+func newRequestSizeMetric(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "web_request_size_bytes",
+			Help:      "A histogram displaying the size of each HTTP request in bytes.",
+			Buckets:   common.DefaultSizeBuckets,
+		},
+		[]string{"url", "response_code"},
+	)
+}
+
+func (w *webImpl) RecordRequestSize(size float64, url string, code int) {
+	w.httpRequestSize.WithLabelValues(url, strconv.Itoa(code)).Observe(size)
+}
+
+func newRequestDurationMetric(serviceName string) *prometheus.HistogramVec {
+	return prometheus.NewHistogramVec(
+		prometheus.HistogramOpts{
+			Namespace: serviceName,
+			Name:      "web_request_duration_seconds",
+			Help:      "A histogram displaying the duration of each HTTP request in seconds.",
+			Buckets:   common.DefaultDurationBuckets,
+		},
+		[]string{"url", "response_code"},
+	)
+}
+
+func (w *webImpl) RecordRequestDuration(durMillis float64, url string, code int) {
+	w.httpRequestDuration.WithLabelValues(url, strconv.Itoa(code)).Observe(durMillis / 1000.0)
+}
+
+func newTotalRequestsMetric(serviceName string) prometheus.Counter {
+	return prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Namespace: serviceName,
+			Name:      "web_requests_total",
+			Help:      "A counter displaying the number all HTTP requests.",
+		},
+	)
+}
+
+func (w *webImpl) IncreaseTotalRequests() {
+	w.httpTotalRequests.Inc()
+}

ee/backend/pkg/server/tracer/tracer.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"net/http"
+	"openreplay/backend/pkg/metrics/database"
 
 	"openreplay/backend/pkg/db/postgres"
 	db "openreplay/backend/pkg/db/postgres/pool"
@@ -22,9 +23,10 @@ type tracerImpl struct {
 	conn    db.Pool
 	traces  postgres.Bulk
 	saver   pool.WorkerPool
+	metrics database.Database
 }
 
-func NewTracer(log logger.Logger, conn db.Pool) (Tracer, error) {
+func NewTracer(log logger.Logger, conn db.Pool, metrics database.Database) (Tracer, error) {
 	switch {
 	case log == nil:
 		return nil, errors.New("logger is required")
@@ -34,6 +36,7 @@ func NewTracer(log logger.Logger, conn db.Pool) (Tracer, error) {
 	tracer := &tracerImpl{
 		log:     log,
 		conn:    conn,
+		metrics: metrics,
 	}
 	if err := tracer.initBulk(); err != nil {
 		return nil, err
@@ -43,7 +46,7 @@ func NewTracer(log logger.Logger, conn db.Pool) (Tracer, error) {
 }
 
 func (t *tracerImpl) initBulk() (err error) {
-	t.traces, err = postgres.NewBulk(t.conn,
+	t.traces, err = postgres.NewBulk(t.conn, t.metrics,
 		"traces",
 		"(user_id, tenant_id, auth, action, method, path_format, endpoint, payload, parameters, status)",
 		"($%d, $%d, $%d, $%d, $%d, $%d, $%d, $%d, $%d, $%d)",

ee/backend/pkg/sessions/redis.go

@@ -10,8 +10,15 @@ import (
 	"openreplay/backend/pkg/metrics/database"
 )
 
+var ErrDisabledCache = errors.New("cache is disabled")
+
 type cacheImpl struct {
 	db      *redis.Client
+	metrics database.Database
+}
+
+func NewCache(db *redis.Client, metrics database.Database) Cache {
+	return &cacheImpl{db: db, metrics: metrics}
 }
 
 func (c *cacheImpl) SetCache(sessID uint64, data map[string]string) error {
@@ -32,8 +39,8 @@ func (c *cacheImpl) SetCache(sessID uint64, data map[string]string) error {
 	if _, err = c.db.Redis.Set(fmt.Sprintf("session:cache:id:%d", sessID), sessionBytes, time.Minute*120).Result(); err != nil {
 		return err
 	}
-	database.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "setCache", "session")
-	database.IncreaseRedisRequests("setCache", "sessions")
+	c.metrics.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "setCache", "session")
+	c.metrics.IncreaseRedisRequests("setCache", "sessions")
 	return nil
 }
 
@@ -53,8 +60,8 @@ func (c *cacheImpl) GetCache(sessID uint64) (map[string]string, error) {
 	if err = json.Unmarshal([]byte(result), &session); err != nil {
 		return nil, err
 	}
-	database.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "getCache", "session")
-	database.IncreaseRedisRequests("getCache", "sessions")
+	c.metrics.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "getCache", "session")
+	c.metrics.IncreaseRedisRequests("getCache", "sessions")
 	return session, nil
 }
 
@@ -76,8 +83,8 @@ func (c *cacheImpl) Set(session *Session) error {
 	if _, err = c.db.Redis.Set(fmt.Sprintf("session:id:%d", session.SessionID), sessionBytes, time.Minute*60).Result(); err != nil {
 		return err
 	}
-	database.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "set", "session")
-	database.IncreaseRedisRequests("set", "sessions")
+	c.metrics.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "set", "session")
+	c.metrics.IncreaseRedisRequests("set", "sessions")
 	return nil
 }
 
@@ -97,13 +104,7 @@ func (c *cacheImpl) Get(sessionID uint64) (*Session, error) {
 	if err = json.Unmarshal([]byte(result), session); err != nil {
 		return nil, err
 	}
-	database.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "get", "session")
-	database.IncreaseRedisRequests("get", "sessions")
+	c.metrics.RecordRedisRequestDuration(float64(time.Now().Sub(start).Milliseconds()), "get", "session")
+	c.metrics.IncreaseRedisRequests("get", "sessions")
 	return session, nil
 }
-
-var ErrDisabledCache = errors.New("cache is disabled")
-
-func NewCache(db *redis.Client) Cache {
-	return &cacheImpl{db: db}
-}