[#426] Put prometheus behind pkg/metrics

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

cmd/neofs-node/config.go

@@ -24,6 +24,7 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/engine"
 	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
+	"github.com/nspcc-dev/neofs-node/pkg/metrics"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client/container/wrapper"
 	nmwrapper "github.com/nspcc-dev/neofs-node/pkg/morph/client/netmap/wrapper"
@@ -184,7 +185,9 @@ type cfg struct {
 
 	profiler profiler.Profiler
 
-	metrics profiler.Metrics
+	metricsServer profiler.Metrics
+
+	metricsCollector *metrics.StorageMetrics
 
 	workers []worker
 
@@ -362,6 +365,10 @@ func initCfg(path string) *cfg {
 		healthStatus: atomic.NewInt32(int32(control.HealthStatus_HEALTH_STATUS_UNDEFINED)),
 	}
 
+	if viperCfg.GetBool(cfgMetricsEnable) {
+		c.metricsCollector = metrics.NewStorageMetrics()
+	}
+
 	initLocalStorage(c)
 
 	return c
@@ -457,7 +464,7 @@ func initLocalStorage(c *cfg) {
 
 	ls := engine.New(
 		engine.WithLogger(c.log),
-		engine.WithMetrics(c.viper.GetBool(cfgMetricsEnable)),
+		engine.WithMetrics(c.metricsCollector),
 	)
 
 	for _, opts := range c.cfgObject.cfgLocalStorage.shardOpts {

cmd/neofs-node/metrics.go

@@ -5,11 +5,13 @@ import (
 )
 
 func initMetrics(c *cfg) {
-	c.metrics = profiler.NewMetrics(c.log, c.viper)
+	if c.metricsCollector != nil {
+		c.metricsServer = profiler.NewMetrics(c.log, c.viper)
+	}
 }
 
 func serveMetrics(c *cfg) {
-	if c.metrics != nil {
-		c.metrics.Start(c.ctx)
+	if c.metricsServer != nil {
+		c.metricsServer.Start(c.ctx)
 	}
 }

cmd/neofs-node/object.go

@@ -345,8 +345,8 @@ func initObjectService(c *cfg) {
 	)
 
 	var firstSvc objectService.ServiceServer = aclSvc
-	if c.viper.GetBool(cfgMetricsEnable) {
-		firstSvc = objectService.NewMetricCollector(aclSvc)
+	if c.metricsCollector != nil {
+		firstSvc = objectService.NewMetricCollector(aclSvc, c.metricsCollector)
 	}
 
 	objectGRPC.RegisterObjectServiceServer(c.cfgGRPC.server,

pkg/local_object_storage/engine/container.go

@@ -38,8 +38,8 @@ func (r *ListContainersRes) Containers() []*container.ID {
 
 // ContainerSize returns sum of estimation container sizes among all shards.
 func (e *StorageEngine) ContainerSize(prm *ContainerSizePrm) *ContainerSizeRes {
-	if e.enableMetrics {
-		defer elapsed(estimateContainerSizeDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddEstimateContainerSizeDuration)()
 	}
 
 	return &ContainerSizeRes{
@@ -74,8 +74,8 @@ func (e *StorageEngine) containerSize(id *container.ID) (total uint64) {
 
 // ListContainers returns unique container IDs presented in the engine objects.
 func (e *StorageEngine) ListContainers(_ *ListContainersPrm) *ListContainersRes {
-	if e.enableMetrics {
-		defer elapsed(listContainersDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddListContainersDuration)()
 	}
 
 	return &ListContainersRes{

pkg/local_object_storage/engine/control.go

@@ -30,10 +30,6 @@ func (e *StorageEngine) Init() error {
 		}
 	}
 
-	if e.enableMetrics {
-		registerMetrics()
-	}
-
 	return nil
 }
 

pkg/local_object_storage/engine/delete.go

@@ -27,8 +27,8 @@ func (p *DeletePrm) WithAddresses(addr ...*objectSDK.Address) *DeletePrm {
 
 // Delete marks the objects to be removed.
 func (e *StorageEngine) Delete(prm *DeletePrm) (*DeleteRes, error) {
-	if e.enableMetrics {
-		defer elapsed(deleteDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddDeleteDuration)()
 	}
 
 	shPrm := new(shard.InhumePrm)

pkg/local_object_storage/engine/engine.go

@@ -23,7 +23,7 @@ type Option func(*cfg)
 type cfg struct {
 	log *logger.Logger
 
-	enableMetrics bool
+	metrics MetricRegister
 }
 
 func defaultCfg() *cfg {
@@ -54,8 +54,8 @@ func WithLogger(l *logger.Logger) Option {
 	}
 }
 
-func WithMetrics(v bool) Option {
+func WithMetrics(v MetricRegister) Option {
 	return func(c *cfg) {
-		c.enableMetrics = v
+		c.metrics = v
 	}
 }

pkg/local_object_storage/engine/exists.go

@@ -38,8 +38,8 @@ func (p *ExistsRes) Exists() bool {
 // Returns any error encountered that does not allow to
 // unambiguously determine the presence of an object.
 func (e *StorageEngine) Exists(prm *ExistsPrm) (*ExistsRes, error) {
-	if e.enableMetrics {
-		defer elapsed(existsDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddExistsDuration)()
 	}
 
 	exists, err := e.exists(prm.addr)

pkg/local_object_storage/engine/get.go

@@ -42,8 +42,8 @@ func (r *GetRes) Object() *object.Object {
 //
 // Returns ErrNotFound if requested object is missing in local storage.
 func (e *StorageEngine) Get(prm *GetPrm) (*GetRes, error) {
-	if e.enableMetrics {
-		defer elapsed(getDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddGetDuration)()
 	}
 
 	var (

pkg/local_object_storage/engine/head.go

@@ -56,8 +56,8 @@ func (r *HeadRes) Header() *object.Object {
 // Returns object.ErrNotFound if requested object is missing in local storage.
 // Returns object.ErrAlreadyRemoved if requested object was inhumed.
 func (e *StorageEngine) Head(prm *HeadPrm) (*HeadRes, error) {
-	if e.enableMetrics {
-		defer elapsed(headDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddHeadDuration)()
 	}
 
 	var (

pkg/local_object_storage/engine/inhume.go

@@ -49,8 +49,8 @@ var errInhumeFailure = errors.New("inhume operation failed")
 // Inhume calls metabase. Inhume method to mark object as removed. It won't be
 // removed physically from shard until `Delete` operation.
 func (e *StorageEngine) Inhume(prm *InhumePrm) (*InhumeRes, error) {
-	if e.enableMetrics {
-		defer elapsed(inhumeDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddInhumeDuration)()
 	}
 
 	shPrm := new(shard.InhumePrm)

pkg/local_object_storage/engine/metrics.go

@@ -2,112 +2,26 @@ package engine
 
 import (
 	"time"
-
-	"github.com/prometheus/client_golang/prometheus"
 )
 
-const (
-	namespace = "neofs_node"
-	subsystem = "engine"
-)
-
-var (
-	listContainersDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "list_containers_duration",
-		Help:      "Accumulated duration of engine list containers operations",
-	})
-
-	estimateContainerSizeDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "estimate_container_size_duration",
-		Help:      "Accumulated duration of engine container size estimate operations",
-	})
-
-	deleteDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "delete_duration",
-		Help:      "Accumulated duration of engine delete operations",
-	})
-
-	existsDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "exists_duration",
-		Help:      "Accumulated duration of engine exists operations",
-	})
-
-	getDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "get_duration",
-		Help:      "Accumulated duration of engine get operations",
-	})
-
-	headDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "head_duration",
-		Help:      "Accumulated duration of engine head operations",
-	})
-
-	inhumeDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "inhume_duration",
-		Help:      "Accumulated duration of engine inhume operations",
-	})
-
-	putDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "put_duration",
-		Help:      "Accumulated duration of engine put operations",
-	})
-
-	rangeDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "range_duration",
-		Help:      "Accumulated duration of engine range operations",
-	})
-
-	searchDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "search_duration",
-		Help:      "Accumulated duration of engine search operations",
-	})
-
-	listObjectsDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "list_objects_duration",
-		Help:      "Accumulated duration of engine list objects operations",
-	})
-)
-
-func registerMetrics() {
-	prometheus.MustRegister(listContainersDuration)
-	prometheus.MustRegister(estimateContainerSizeDuration)
-	prometheus.MustRegister(deleteDuration)
-	prometheus.MustRegister(existsDuration)
-	prometheus.MustRegister(getDuration)
-	prometheus.MustRegister(headDuration)
-	prometheus.MustRegister(inhumeDuration)
-	prometheus.MustRegister(putDuration)
-	prometheus.MustRegister(rangeDuration)
-	prometheus.MustRegister(searchDuration)
-	prometheus.MustRegister(listObjectsDuration)
+type MetricRegister interface {
+	AddListContainersDuration(d time.Duration)
+	AddEstimateContainerSizeDuration(d time.Duration)
+	AddDeleteDuration(d time.Duration)
+	AddExistsDuration(d time.Duration)
+	AddGetDuration(d time.Duration)
+	AddHeadDuration(d time.Duration)
+	AddInhumeDuration(d time.Duration)
+	AddPutDuration(d time.Duration)
+	AddRangeDuration(d time.Duration)
+	AddSearchDuration(d time.Duration)
+	AddListObjectsDuration(d time.Duration)
 }
 
-func elapsed(c prometheus.Counter) func() {
+func elapsed(addFunc func(d time.Duration)) func() {
 	t := time.Now()
 
 	return func() {
-		c.Add(float64(time.Since(t)))
+		addFunc(time.Since(t))
 	}
 }

pkg/local_object_storage/engine/put.go

@@ -34,8 +34,8 @@ func (p *PutPrm) WithObject(obj *object.Object) *PutPrm {
 // Returns any error encountered that
 // did not allow to completely save the object.
 func (e *StorageEngine) Put(prm *PutPrm) (*PutRes, error) {
-	if e.enableMetrics {
-		defer elapsed(putDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddPutDuration)()
 	}
 
 	_, err := e.exists(prm.obj.Address()) // todo: make this check parallel

pkg/local_object_storage/engine/range.go

@@ -60,8 +60,8 @@ func (r *RngRes) Object() *object.Object {
 // Returns ErrAlreadyRemoved if requested object is inhumed.
 // Returns ErrRangeOutOfBounds if requested object range is out of bounds.
 func (e *StorageEngine) GetRange(prm *RngPrm) (*RngRes, error) {
-	if e.enableMetrics {
-		defer elapsed(rangeDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddRangeDuration)()
 	}
 
 	var (

pkg/local_object_storage/engine/select.go

@@ -48,8 +48,8 @@ func (r *SelectRes) AddressList() []*object.Address {
 //
 // Returns any error encountered that did not allow to completely select the objects.
 func (e *StorageEngine) Select(prm *SelectPrm) (*SelectRes, error) {
-	if e.enableMetrics {
-		defer elapsed(searchDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddSearchDuration)()
 	}
 
 	addrList := make([]*object.Address, 0)
@@ -98,8 +98,8 @@ func (e *StorageEngine) Select(prm *SelectPrm) (*SelectRes, error) {
 // List returns `limit` available physically storage object addresses in engine.
 // If limit is zero, then returns all available object addresses.
 func (e *StorageEngine) List(limit uint64) (*SelectRes, error) {
-	if e.enableMetrics {
-		defer elapsed(listObjectsDuration)()
+	if e.metrics != nil {
+		defer elapsed(e.metrics.AddListObjectsDuration)()
 	}
 
 	addrList := make([]*object.Address, limit)

pkg/metrics/engine.go

@@ -0,0 +1,178 @@
+package metrics
+
+import (
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type (
+	engineMetrics struct {
+		listContainersDuration        prometheus.Counter
+		estimateContainerSizeDuration prometheus.Counter
+		deleteDuration                prometheus.Counter
+		existsDuration                prometheus.Counter
+		getDuration                   prometheus.Counter
+		headDuration                  prometheus.Counter
+		inhumeDuration                prometheus.Counter
+		putDuration                   prometheus.Counter
+		rangeDuration                 prometheus.Counter
+		searchDuration                prometheus.Counter
+		listObjectsDuration           prometheus.Counter
+	}
+)
+
+const engineSubsystem = "engine"
+
+func newEngineMetrics() engineMetrics {
+	var (
+		listContainersDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "list_containers_duration",
+			Help:      "Accumulated duration of engine list containers operations",
+		})
+
+		estimateContainerSizeDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "estimate_container_size_duration",
+			Help:      "Accumulated duration of engine container size estimate operations",
+		})
+
+		deleteDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "delete_duration",
+			Help:      "Accumulated duration of engine delete operations",
+		})
+
+		existsDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "exists_duration",
+			Help:      "Accumulated duration of engine exists operations",
+		})
+
+		getDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "get_duration",
+			Help:      "Accumulated duration of engine get operations",
+		})
+
+		headDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "head_duration",
+			Help:      "Accumulated duration of engine head operations",
+		})
+
+		inhumeDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "inhume_duration",
+			Help:      "Accumulated duration of engine inhume operations",
+		})
+
+		putDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "put_duration",
+			Help:      "Accumulated duration of engine put operations",
+		})
+
+		rangeDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "range_duration",
+			Help:      "Accumulated duration of engine range operations",
+		})
+
+		searchDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "search_duration",
+			Help:      "Accumulated duration of engine search operations",
+		})
+
+		listObjectsDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: engineSubsystem,
+			Name:      "list_objects_duration",
+			Help:      "Accumulated duration of engine list objects operations",
+		})
+	)
+
+	return engineMetrics{
+		listContainersDuration:        listContainersDuration,
+		estimateContainerSizeDuration: estimateContainerSizeDuration,
+		deleteDuration:                deleteDuration,
+		existsDuration:                existsDuration,
+		getDuration:                   getDuration,
+		headDuration:                  headDuration,
+		inhumeDuration:                inhumeDuration,
+		putDuration:                   putDuration,
+		rangeDuration:                 rangeDuration,
+		searchDuration:                searchDuration,
+		listObjectsDuration:           listObjectsDuration,
+	}
+}
+
+func (m engineMetrics) register() {
+	prometheus.MustRegister(m.listContainersDuration)
+	prometheus.MustRegister(m.estimateContainerSizeDuration)
+	prometheus.MustRegister(m.deleteDuration)
+	prometheus.MustRegister(m.existsDuration)
+	prometheus.MustRegister(m.getDuration)
+	prometheus.MustRegister(m.headDuration)
+	prometheus.MustRegister(m.inhumeDuration)
+	prometheus.MustRegister(m.putDuration)
+	prometheus.MustRegister(m.rangeDuration)
+	prometheus.MustRegister(m.searchDuration)
+	prometheus.MustRegister(m.listObjectsDuration)
+}
+
+func (m engineMetrics) AddListContainersDuration(d time.Duration) {
+	m.listObjectsDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddEstimateContainerSizeDuration(d time.Duration) {
+	m.estimateContainerSizeDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddDeleteDuration(d time.Duration) {
+	m.deleteDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddExistsDuration(d time.Duration) {
+	m.existsDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddGetDuration(d time.Duration) {
+	m.getDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddHeadDuration(d time.Duration) {
+	m.headDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddInhumeDuration(d time.Duration) {
+	m.inhumeDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddPutDuration(d time.Duration) {
+	m.putDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddRangeDuration(d time.Duration) {
+	m.rangeDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddSearchDuration(d time.Duration) {
+	m.searchDuration.Add(float64(d))
+}
+
+func (m engineMetrics) AddListObjectsDuration(d time.Duration) {
+	m.listObjectsDuration.Add(float64(d))
+}

pkg/metrics/metrics.go

@@ -0,0 +1,21 @@
+package metrics
+
+const namespace = "neofs_node"
+
+type StorageMetrics struct {
+	objectServiceMetrics
+	engineMetrics
+}
+
+func NewStorageMetrics() *StorageMetrics {
+	objectService := newObjectServiceMetrics()
+	objectService.register()
+
+	engine := newEngineMetrics()
+	engine.register()
+
+	return &StorageMetrics{
+		objectServiceMetrics: objectService,
+		engineMetrics:        engine,
+	}
+}

pkg/metrics/object.go

@@ -0,0 +1,256 @@
+package metrics
+
+import (
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+const objectSubsystem = "object"
+
+type (
+	objectServiceMetrics struct {
+		getCounter       prometheus.Counter
+		putCounter       prometheus.Counter
+		headCounter      prometheus.Counter
+		searchCounter    prometheus.Counter
+		deleteCounter    prometheus.Counter
+		rangeCounter     prometheus.Counter
+		rangeHashCounter prometheus.Counter
+
+		getDuration       prometheus.Counter
+		putDuration       prometheus.Counter
+		headDuration      prometheus.Counter
+		searchDuration    prometheus.Counter
+		deleteDuration    prometheus.Counter
+		rangeDuration     prometheus.Counter
+		rangeHashDuration prometheus.Counter
+
+		putPayload prometheus.Counter
+		getPayload prometheus.Counter
+	}
+)
+
+func newObjectServiceMetrics() objectServiceMetrics {
+	var ( // Request counter metrics.
+		getCounter = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "get_req_count",
+			Help:      "Number of get request processed",
+		})
+
+		putCounter = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "put_req_count",
+			Help:      "Number of put request processed",
+		})
+
+		headCounter = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "head_req_count",
+			Help:      "Number of head request processed",
+		})
+
+		searchCounter = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "search_req_count",
+			Help:      "Number of search request processed",
+		})
+
+		deleteCounter = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "delete_req_count",
+			Help:      "Number of delete request processed",
+		})
+
+		rangeCounter = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "range_req_count",
+			Help:      "Number of range request processed",
+		})
+
+		rangeHashCounter = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "range_hash_req_count",
+			Help:      "Number of range hash request processed",
+		})
+	)
+
+	var ( // Request duration metrics.
+		getDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "get_req_duration",
+			Help:      "Accumulated get request process duration",
+		})
+
+		putDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "put_req_duration",
+			Help:      "Accumulated put request process duration",
+		})
+
+		headDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "head_req_duration",
+			Help:      "Accumulated head request process duration",
+		})
+
+		searchDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "search_req_duration",
+			Help:      "Accumulated search request process duration",
+		})
+
+		deleteDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "delete_req_duration",
+			Help:      "Accumulated delete request process duration",
+		})
+
+		rangeDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "range_req_duration",
+			Help:      "Accumulated range request process duration",
+		})
+
+		rangeHashDuration = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "range_hash_req_duration",
+			Help:      "Accumulated range hash request process duration",
+		})
+	)
+
+	var ( // Object payload metrics.
+		putPayload = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "put_payload",
+			Help:      "Accumulated payload size at object put method",
+		})
+
+		getPayload = prometheus.NewCounter(prometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: objectSubsystem,
+			Name:      "get_payload",
+			Help:      "Accumulated payload size at object get method",
+		})
+	)
+
+	return objectServiceMetrics{
+		getCounter:        getCounter,
+		putCounter:        putCounter,
+		headCounter:       headCounter,
+		searchCounter:     searchCounter,
+		deleteCounter:     deleteCounter,
+		rangeCounter:      rangeCounter,
+		rangeHashCounter:  rangeHashCounter,
+		getDuration:       getDuration,
+		putDuration:       putDuration,
+		headDuration:      headDuration,
+		searchDuration:    searchDuration,
+		deleteDuration:    deleteDuration,
+		rangeDuration:     rangeDuration,
+		rangeHashDuration: rangeHashDuration,
+		putPayload:        putPayload,
+		getPayload:        getPayload,
+	}
+}
+
+func (m objectServiceMetrics) register() {
+	prometheus.MustRegister(m.getCounter)
+	prometheus.MustRegister(m.putCounter)
+	prometheus.MustRegister(m.headCounter)
+	prometheus.MustRegister(m.searchCounter)
+	prometheus.MustRegister(m.deleteCounter)
+	prometheus.MustRegister(m.rangeCounter)
+	prometheus.MustRegister(m.rangeHashCounter)
+
+	prometheus.MustRegister(m.getDuration)
+	prometheus.MustRegister(m.putDuration)
+	prometheus.MustRegister(m.headDuration)
+	prometheus.MustRegister(m.searchDuration)
+	prometheus.MustRegister(m.deleteDuration)
+	prometheus.MustRegister(m.rangeDuration)
+	prometheus.MustRegister(m.rangeHashDuration)
+
+	prometheus.MustRegister(m.putPayload)
+	prometheus.MustRegister(m.getPayload)
+}
+
+func (m objectServiceMetrics) IncGetReqCounter() {
+	m.getCounter.Inc()
+}
+
+func (m objectServiceMetrics) IncPutReqCounter() {
+	m.putCounter.Inc()
+}
+
+func (m objectServiceMetrics) IncHeadReqCounter() {
+	m.headCounter.Inc()
+}
+
+func (m objectServiceMetrics) IncSearchReqCounter() {
+	m.searchCounter.Inc()
+}
+
+func (m objectServiceMetrics) IncDeleteReqCounter() {
+	m.deleteCounter.Inc()
+}
+
+func (m objectServiceMetrics) IncRangeReqCounter() {
+	m.rangeCounter.Inc()
+}
+
+func (m objectServiceMetrics) IncRangeHashReqCounter() {
+	m.rangeHashCounter.Inc()
+}
+
+func (m objectServiceMetrics) AddGetReqDuration(d time.Duration) {
+	m.getDuration.Add(float64(d))
+}
+
+func (m objectServiceMetrics) AddPutReqDuration(d time.Duration) {
+	m.putDuration.Add(float64(d))
+}
+
+func (m objectServiceMetrics) AddHeadReqDuration(d time.Duration) {
+	m.headDuration.Add(float64(d))
+}
+
+func (m objectServiceMetrics) AddSearchReqDuration(d time.Duration) {
+	m.searchDuration.Add(float64(d))
+}
+
+func (m objectServiceMetrics) AddDeleteReqDuration(d time.Duration) {
+	m.deleteDuration.Add(float64(d))
+}
+
+func (m objectServiceMetrics) AddRangeReqDuration(d time.Duration) {
+	m.rangeDuration.Add(float64(d))
+}
+
+func (m objectServiceMetrics) AddRangeHashReqDuration(d time.Duration) {
+	m.rangeHashDuration.Add(float64(d))
+}
+
+func (m objectServiceMetrics) AddPutPayload(ln int) {
+	m.putPayload.Add(float64(ln))
+}
+
+func (m objectServiceMetrics) AddGetPayload(ln int) {
+	m.getPayload.Add(float64(ln))
+}

pkg/services/object/metrics.go

@@ -6,198 +6,73 @@ import (
 
 	"github.com/nspcc-dev/neofs-api-go/v2/object"
 	"github.com/nspcc-dev/neofs-node/pkg/services/util"
-	"github.com/prometheus/client_golang/prometheus"
 )
 
 type (
 	MetricCollector struct {
-		next ServiceServer
+		next    ServiceServer
+		metrics MetricRegister
 	}
 
 	getStreamMetric struct {
 		util.ServerStream
-		stream GetObjectStream
+		stream  GetObjectStream
+		metrics MetricRegister
 	}
 
 	putStreamMetric struct {
-		stream object.PutObjectStreamer
+		stream  object.PutObjectStreamer
+		metrics MetricRegister
+	}
+
+	MetricRegister interface {
+		IncGetReqCounter()
+		IncPutReqCounter()
+		IncHeadReqCounter()
+		IncSearchReqCounter()
+		IncDeleteReqCounter()
+		IncRangeReqCounter()
+		IncRangeHashReqCounter()
+
+		AddGetReqDuration(time.Duration)
+		AddPutReqDuration(time.Duration)
+		AddHeadReqDuration(time.Duration)
+		AddSearchReqDuration(time.Duration)
+		AddDeleteReqDuration(time.Duration)
+		AddRangeReqDuration(time.Duration)
+		AddRangeHashReqDuration(time.Duration)
+
+		AddPutPayload(int)
+		AddGetPayload(int)
 	}
 )
 
-const (
-	namespace = "neofs_node"
-	subsystem = "object"
-)
-
-// Request counter metrics.
-var (
-	getCounter = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace:   namespace,
-		Subsystem:   subsystem,
-		Name:        "get_req_count",
-		Help:        "Number of get request processed",
-		ConstLabels: nil,
-	})
-
-	putCounter = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "put_req_count",
-		Help:      "Number of put request processed",
-	})
-
-	headCounter = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "head_req_count",
-		Help:      "Number of head request processed",
-	})
-
-	searchCounter = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "search_req_count",
-		Help:      "Number of search request processed",
-	})
-
-	deleteCounter = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "delete_req_count",
-		Help:      "Number of delete request processed",
-	})
-
-	rangeCounter = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "range_req_count",
-		Help:      "Number of range request processed",
-	})
-
-	rangeHashCounter = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "range_hash_req_count",
-		Help:      "Number of range hash request processed",
-	})
-)
-
-// Request duration metrics.
-var (
-	getDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "get_req_duration",
-		Help:      "Accumulated get request process duration",
-	})
-
-	putDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "put_req_duration",
-		Help:      "Accumulated put request process duration",
-	})
-
-	headDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "head_req_duration",
-		Help:      "Accumulated head request process duration",
-	})
-
-	searchDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "search_req_duration",
-		Help:      "Accumulated search request process duration",
-	})
-
-	deleteDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "delete_req_duration",
-		Help:      "Accumulated delete request process duration",
-	})
-
-	rangeDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "range_req_duration",
-		Help:      "Accumulated range request process duration",
-	})
-
-	rangeHashDuration = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "range_hash_req_duration",
-		Help:      "Accumulated range hash request process duration",
-	})
-)
-
-// Object payload metrics.
-var (
-	putPayload = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "put_payload",
-		Help:      "Accumulated payload size at object put method",
-	})
-
-	getPayload = prometheus.NewCounter(prometheus.CounterOpts{
-		Namespace: namespace,
-		Subsystem: subsystem,
-		Name:      "get_payload",
-		Help:      "Accumulated payload size at object get method",
-	})
-)
-
-func registerMetrics() {
-	prometheus.MustRegister(getCounter) // todo: replace with for loop over map
-	prometheus.MustRegister(putCounter)
-	prometheus.MustRegister(headCounter)
-	prometheus.MustRegister(searchCounter)
-	prometheus.MustRegister(deleteCounter)
-	prometheus.MustRegister(rangeCounter)
-	prometheus.MustRegister(rangeHashCounter)
-
-	prometheus.MustRegister(getDuration)
-	prometheus.MustRegister(putDuration)
-	prometheus.MustRegister(headDuration)
-	prometheus.MustRegister(searchDuration)
-	prometheus.MustRegister(deleteDuration)
-	prometheus.MustRegister(rangeDuration)
-	prometheus.MustRegister(rangeHashDuration)
-
-	prometheus.MustRegister(putPayload)
-	prometheus.MustRegister(getPayload)
-}
-
-func NewMetricCollector(next ServiceServer) *MetricCollector {
-	registerMetrics()
-
+func NewMetricCollector(next ServiceServer, register MetricRegister) *MetricCollector {
 	return &MetricCollector{
-		next: next,
+		next:    next,
+		metrics: register,
 	}
 }
 
 func (m MetricCollector) Get(req *object.GetRequest, stream GetObjectStream) error {
 	t := time.Now()
 	defer func() {
-		getCounter.Inc()
-		getDuration.Add(float64(time.Since(t)))
+		m.metrics.IncGetReqCounter()
+		m.metrics.AddGetReqDuration(time.Since(t))
 	}()
 
 	return m.next.Get(req, &getStreamMetric{
 		ServerStream: stream,
 		stream:       stream,
+		metrics:      m.metrics,
 	})
 }
 
 func (m MetricCollector) Put(ctx context.Context) (object.PutObjectStreamer, error) {
 	t := time.Now()
 	defer func() {
-		putCounter.Inc()
-		putDuration.Add(float64(time.Since(t)))
+		m.metrics.IncPutReqCounter()
+		m.metrics.AddPutReqDuration(time.Since(t))
 	}()
 
 	stream, err := m.next.Put(ctx)
@@ -205,14 +80,17 @@ func (m MetricCollector) Put(ctx context.Context) (object.PutObjectStreamer, err
 		return nil, err
 	}
 
-	return &putStreamMetric{stream: stream}, nil
+	return &putStreamMetric{
+		stream:  stream,
+		metrics: m.metrics,
+	}, nil
 }
 
 func (m MetricCollector) Head(ctx context.Context, request *object.HeadRequest) (*object.HeadResponse, error) {
 	t := time.Now()
 	defer func() {
-		headCounter.Inc()
-		headDuration.Add(float64(time.Since(t)))
+		m.metrics.IncHeadReqCounter()
+		m.metrics.AddHeadReqDuration(time.Since(t))
 	}()
 
 	return m.next.Head(ctx, request)
@@ -221,8 +99,8 @@ func (m MetricCollector) Head(ctx context.Context, request *object.HeadRequest)
 func (m MetricCollector) Search(req *object.SearchRequest, stream SearchStream) error {
 	t := time.Now()
 	defer func() {
-		searchCounter.Inc()
-		searchDuration.Add(float64(time.Since(t)))
+		m.metrics.IncSearchReqCounter()
+		m.metrics.AddSearchReqDuration(time.Since(t))
 	}()
 
 	return m.next.Search(req, stream)
@@ -231,8 +109,8 @@ func (m MetricCollector) Search(req *object.SearchRequest, stream SearchStream)
 func (m MetricCollector) Delete(ctx context.Context, request *object.DeleteRequest) (*object.DeleteResponse, error) {
 	t := time.Now()
 	defer func() {
-		deleteCounter.Inc()
-		deleteDuration.Add(float64(time.Since(t)))
+		m.metrics.IncDeleteReqCounter()
+		m.metrics.AddDeleteReqDuration(time.Since(t))
 	}()
 
 	return m.next.Delete(ctx, request)
@@ -241,8 +119,8 @@ func (m MetricCollector) Delete(ctx context.Context, request *object.DeleteReque
 func (m MetricCollector) GetRange(req *object.GetRangeRequest, stream GetObjectRangeStream) error {
 	t := time.Now()
 	defer func() {
-		rangeCounter.Inc()
-		rangeDuration.Add(float64(time.Since(t)))
+		m.metrics.IncRangeReqCounter()
+		m.metrics.AddRangeReqDuration(time.Since(t))
 	}()
 
 	return m.next.GetRange(req, stream)
@@ -251,8 +129,8 @@ func (m MetricCollector) GetRange(req *object.GetRangeRequest, stream GetObjectR
 func (m MetricCollector) GetRangeHash(ctx context.Context, request *object.GetRangeHashRequest) (*object.GetRangeHashResponse, error) {
 	t := time.Now()
 	defer func() {
-		rangeHashCounter.Inc()
-		rangeHashDuration.Add(float64(time.Since(t)))
+		m.metrics.IncRangeHashReqCounter()
+		m.metrics.AddRangeHashReqDuration(time.Since(t))
 	}()
 
 	return m.next.GetRangeHash(ctx, request)
@@ -261,8 +139,7 @@ func (m MetricCollector) GetRangeHash(ctx context.Context, request *object.GetRa
 func (s getStreamMetric) Send(resp *object.GetResponse) error {
 	chunk, ok := resp.GetBody().GetObjectPart().(*object.GetObjectPartChunk)
 	if ok {
-		ln := len(chunk.GetChunk())
-		getPayload.Add(float64(ln))
+		s.metrics.AddGetPayload(len(chunk.GetChunk()))
 	}
 
 	return s.stream.Send(resp)
@@ -271,8 +148,7 @@ func (s getStreamMetric) Send(resp *object.GetResponse) error {
 func (s putStreamMetric) Send(req *object.PutRequest) error {
 	chunk, ok := req.GetBody().GetObjectPart().(*object.PutObjectPartChunk)
 	if ok {
-		ln := len(chunk.GetChunk())
-		putPayload.Add(float64(ln))
+		s.metrics.AddPutPayload(len(chunk.GetChunk()))
 	}
 
 	return s.stream.Send(req)