[#374] Add inner-ring event metrics

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

pkg/innerring/initialization.go

@@ -52,6 +52,7 @@ func (s *Server) initNetmapProcessor(cfg *viper.Viper,
 
 	s.netmapProcessor, err = netmap.New(&netmap.Params{
 		Log:              s.log,
+		Metrics:          s.metrics,
 		PoolSize:         cfg.GetInt("workers.netmap"),
 		NetmapClient:     netmap.NewNetmapClient(s.netmapClient),
 		EpochTimer:       s,
@@ -162,6 +163,7 @@ func (s *Server) createAlphaSync(cfg *viper.Viper, frostfsCli *frostfsClient.Cli
 		// create governance processor
 		governanceProcessor, err := governance.New(&governance.Params{
 			Log:           s.log,
+			Metrics:       s.metrics,
 			FrostFSClient: frostfsCli,
 			NetmapClient:  s.netmapClient,
 			AlphabetState: s,
@@ -231,6 +233,7 @@ func (s *Server) initAlphabetProcessor(cfg *viper.Viper) error {
 	s.alphabetProcessor, err = alphabet.New(&alphabet.Params{
 		ParsedWallets:     parsedWallets,
 		Log:               s.log,
+		Metrics:           s.metrics,
 		PoolSize:          cfg.GetInt("workers.alphabet"),
 		AlphabetContracts: s.contracts.alphabet,
 		NetmapClient:      s.netmapClient,
@@ -255,6 +258,7 @@ func (s *Server) initContainerProcessor(cfg *viper.Viper, cnrClient *container.C
 	// container processor
 	containerProcessor, err := cont.New(&cont.Params{
 		Log:             s.log,
+		Metrics:         s.metrics,
 		PoolSize:        cfg.GetInt("workers.container"),
 		AlphabetState:   s,
 		ContainerClient: cnrClient,
@@ -273,6 +277,7 @@ func (s *Server) initBalanceProcessor(cfg *viper.Viper, frostfsCli *frostfsClien
 	// create balance processor
 	balanceProcessor, err := balance.New(&balance.Params{
 		Log:           s.log,
+		Metrics:       s.metrics,
 		PoolSize:      cfg.GetInt("workers.balance"),
 		FrostFSClient: frostfsCli,
 		BalanceSC:     s.contracts.balance,
@@ -293,6 +298,7 @@ func (s *Server) initFrostFSMainnetProcessor(cfg *viper.Viper, frostfsIDClient *
 
 	frostfsProcessor, err := frostfs.New(&frostfs.Params{
 		Log:                 s.log,
+		Metrics:             s.metrics,
 		PoolSize:            cfg.GetInt("workers.frostfs"),
 		FrostFSContract:     s.contracts.frostfs,
 		FrostFSIDClient:     frostfsIDClient,

pkg/innerring/metrics/metrics.go

@@ -0,0 +1,15 @@
+package metrics
+
+import "time"
+
+type Register interface {
+	SetEpoch(epoch uint64)
+	SetHealth(s int32)
+	AddEvent(d time.Duration, typ string, success bool)
+}
+
+type DefaultRegister struct{}
+
+func (DefaultRegister) SetEpoch(uint64)                      {}
+func (DefaultRegister) SetHealth(int32)                      {}
+func (DefaultRegister) AddEvent(time.Duration, string, bool) {}

pkg/innerring/processors/alphabet/handlers.go

@@ -2,6 +2,7 @@ package alphabet
 
 import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/timers"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
 	"go.uber.org/zap"
@@ -13,7 +14,7 @@ func (ap *Processor) HandleGasEmission(ev event.Event) {
 
 	// send event to the worker pool
 
-	err := ap.pool.Submit(func() { ap.processEmit() })
+	err := processors.SubmitEvent(ap.pool, ap.metrics, "alphabet_emit_gas", ap.processEmit)
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		ap.log.Warn(logs.AlphabetAlphabetProcessorWorkerPoolDrained,

pkg/innerring/processors/alphabet/process_emit.go

@@ -13,12 +13,12 @@ import (
 
 const emitMethod = "emit"
 
-func (ap *Processor) processEmit() {
+func (ap *Processor) processEmit() bool {
 	index := ap.irList.AlphabetIndex()
 	if index < 0 {
 		ap.log.Info(logs.AlphabetNonAlphabetModeIgnoreGasEmissionEvent)
 
-		return
+		return true
 	}
 
 	contract, ok := ap.alphabetContracts.GetByIndex(index)
@@ -26,7 +26,7 @@ func (ap *Processor) processEmit() {
 		ap.log.Debug(logs.AlphabetNodeIsOutOfAlphabetRangeIgnoreGasEmissionEvent,
 			zap.Int("index", index))
 
-		return
+		return false
 	}
 
 	// there is no signature collecting, so we don't need extra fee
@@ -34,13 +34,13 @@ func (ap *Processor) processEmit() {
 	if err != nil {
 		ap.log.Warn(logs.AlphabetCantInvokeAlphabetEmitMethod, zap.String("error", err.Error()))
 
-		return
+		return false
 	}
 
 	if ap.storageEmission == 0 {
 		ap.log.Info(logs.AlphabetStorageNodeEmissionIsOff)
 
-		return
+		return true
 	}
 
 	networkMap, err := ap.netmapClient.NetMap()
@@ -48,7 +48,7 @@ func (ap *Processor) processEmit() {
 		ap.log.Warn(logs.AlphabetCantGetNetmapSnapshotToEmitGasToStorageNodes,
 			zap.String("error", err.Error()))
 
-		return
+		return false
 	}
 
 	nmNodes := networkMap.Nodes()
@@ -63,7 +63,7 @@ func (ap *Processor) processEmit() {
 		zap.Int("extra_wallets", extraLen))
 
 	if nmLen+extraLen == 0 {
-		return
+		return true
 	}
 
 	gasPerNode := fixedn.Fixed8(ap.storageEmission / uint64(nmLen+extraLen))
@@ -71,6 +71,8 @@ func (ap *Processor) processEmit() {
 	ap.transferGasToNetmapNodes(nmNodes, gasPerNode)
 
 	ap.transferGasToExtraNodes(pw, gasPerNode)
+
+	return true
 }
 
 func (ap *Processor) transferGasToNetmapNodes(nmNodes []netmap.NodeInfo, gasPerNode fixedn.Fixed8) {

pkg/innerring/processors/alphabet/processor.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
@@ -50,6 +51,7 @@ type (
 		// protects parsedWallets from concurrent change
 		pwLock            *sync.RWMutex
 		log               *logger.Logger
+		metrics           metrics.Register
 		pool              *ants.Pool
 		alphabetContracts Contracts
 		netmapClient      netmapClient
@@ -62,6 +64,7 @@ type (
 	Params struct {
 		ParsedWallets     []util.Uint160
 		Log               *logger.Logger
+		Metrics           metrics.Register
 		PoolSize          int
 		AlphabetContracts Contracts
 		NetmapClient      netmapClient
@@ -89,10 +92,16 @@ func New(p *Params) (*Processor, error) {
 		return nil, fmt.Errorf("ir/frostfs: can't create worker pool: %w", err)
 	}
 
+	metricsRegister := p.Metrics
+	if metricsRegister == nil {
+		metricsRegister = metrics.DefaultRegister{}
+	}
+
 	return &Processor{
 		parsedWallets:     p.ParsedWallets,
 		pwLock:            new(sync.RWMutex),
 		log:               p.Log,
+		metrics:           metricsRegister,
 		pool:              pool,
 		alphabetContracts: p.AlphabetContracts,
 		netmapClient:      p.NetmapClient,

pkg/innerring/processors/balance/handlers.go

@@ -4,6 +4,7 @@ import (
 	"encoding/hex"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
 	balanceEvent "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event/balance"
 	"go.uber.org/zap"
@@ -17,7 +18,9 @@ func (bp *Processor) handleLock(ev event.Event) {
 
 	// send an event to the worker pool
 
-	err := bp.pool.Submit(func() { bp.processLock(&lock) })
+	err := processors.SubmitEvent(bp.pool, bp.metrics, "lock", func() bool {
+		return bp.processLock(&lock)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		bp.log.Warn(logs.BalanceBalanceWorkerPoolDrained,

pkg/innerring/processors/balance/process_assets.go

@@ -9,10 +9,10 @@ import (
 
 // Process lock event by invoking Cheque method in main net to send assets
 // back to the withdraw issuer.
-func (bp *Processor) processLock(lock *balanceEvent.Lock) {
+func (bp *Processor) processLock(lock *balanceEvent.Lock) bool {
 	if !bp.alphabetState.IsAlphabet() {
 		bp.log.Info(logs.BalanceNonAlphabetModeIgnoreBalanceLock)
-		return
+		return true
 	}
 
 	prm := frostfsContract.ChequePrm{}
@@ -26,5 +26,8 @@ func (bp *Processor) processLock(lock *balanceEvent.Lock) {
 	err := bp.frostfsClient.Cheque(prm)
 	if err != nil {
 		bp.log.Error(logs.BalanceCantSendLockAssetTx, zap.Error(err))
+		return false
 	}
+
+	return true
 }

pkg/innerring/processors/balance/processor.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/metrics"
 	frostfscontract "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/frostfs"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
 	balanceEvent "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event/balance"
@@ -32,6 +33,7 @@ type (
 	// Processor of events produced by balance contract in the morphchain.
 	Processor struct {
 		log           *logger.Logger
+		metrics       metrics.Register
 		pool          *ants.Pool
 		frostfsClient FrostFSClient
 		balanceSC     util.Uint160
@@ -42,6 +44,7 @@ type (
 	// Params of the processor constructor.
 	Params struct {
 		Log           *logger.Logger
+		Metrics       metrics.Register
 		PoolSize      int
 		FrostFSClient FrostFSClient
 		BalanceSC     util.Uint160
@@ -72,8 +75,14 @@ func New(p *Params) (*Processor, error) {
 		return nil, fmt.Errorf("ir/balance: can't create worker pool: %w", err)
 	}
 
+	metricsRegister := p.Metrics
+	if metricsRegister == nil {
+		metricsRegister = metrics.DefaultRegister{}
+	}
+
 	return &Processor{
 		log:           p.Log,
+		metrics:       metricsRegister,
 		pool:          pool,
 		frostfsClient: p.FrostFSClient,
 		balanceSC:     p.BalanceSC,

pkg/innerring/processors/container/handlers.go

@@ -4,6 +4,7 @@ import (
 	"crypto/sha256"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
 	containerEvent "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event/container"
 	"github.com/mr-tron/base58"
@@ -20,7 +21,9 @@ func (cp *Processor) handlePut(ev event.Event) {
 
 	// send an event to the worker pool
 
-	err := cp.pool.Submit(func() { cp.processContainerPut(put) })
+	err := processors.SubmitEvent(cp.pool, cp.metrics, "container_put", func() bool {
+		return cp.processContainerPut(put)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		cp.log.Warn(logs.ContainerContainerProcessorWorkerPoolDrained,
@@ -36,7 +39,9 @@ func (cp *Processor) handleDelete(ev event.Event) {
 
 	// send an event to the worker pool
 
-	err := cp.pool.Submit(func() { cp.processContainerDelete(del) })
+	err := processors.SubmitEvent(cp.pool, cp.metrics, "container_delete", func() bool {
+		return cp.processContainerDelete(del)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		cp.log.Warn(logs.ContainerContainerProcessorWorkerPoolDrained,
@@ -53,8 +58,8 @@ func (cp *Processor) handleSetEACL(ev event.Event) {
 
 	// send an event to the worker pool
 
-	err := cp.pool.Submit(func() {
+	err := processors.SubmitEvent(cp.pool, cp.metrics, "container_set_eacl", func() bool {
-		cp.processSetEACL(e)
+		return cp.processSetEACL(e)
 	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage

pkg/innerring/processors/container/process_container.go

@@ -31,10 +31,10 @@ type putContainerContext struct {
 
 // Process a new container from the user by checking the container sanity
 // and sending approve tx back to the morph.
-func (cp *Processor) processContainerPut(put putEvent) {
+func (cp *Processor) processContainerPut(put putEvent) bool {
 	if !cp.alphabetState.IsAlphabet() {
 		cp.log.Info(logs.ContainerNonAlphabetModeIgnoreContainerPut)
-		return
+		return true
 	}
 
 	ctx := &putContainerContext{
@@ -47,10 +47,17 @@ func (cp *Processor) processContainerPut(put putEvent) {
 			zap.String("error", err.Error()),
 		)
 
-		return
+		return false
 	}
 
-	cp.approvePutContainer(ctx)
+	if err := cp.morphClient.NotarySignAndInvokeTX(ctx.e.NotaryRequest().MainTransaction); err != nil {
+		cp.log.Error(logs.ContainerCouldNotApprovePutContainer,
+			zap.String("error", err.Error()),
+		)
+		return false
+	}
+
+	return true
 }
 
 func (cp *Processor) checkPutContainer(ctx *putContainerContext) error {
@@ -89,20 +96,12 @@ func (cp *Processor) checkPutContainer(ctx *putContainerContext) error {
 	return nil
 }
 
-func (cp *Processor) approvePutContainer(ctx *putContainerContext) {
-	if err := cp.morphClient.NotarySignAndInvokeTX(ctx.e.NotaryRequest().MainTransaction); err != nil {
-		cp.log.Error(logs.ContainerCouldNotApprovePutContainer,
-			zap.String("error", err.Error()),
-		)
-	}
-}
-
 // Process delete container operation from the user by checking container sanity
 // and sending approve tx back to morph.
-func (cp *Processor) processContainerDelete(e containerEvent.Delete) {
+func (cp *Processor) processContainerDelete(e containerEvent.Delete) bool {
 	if !cp.alphabetState.IsAlphabet() {
 		cp.log.Info(logs.ContainerNonAlphabetModeIgnoreContainerDelete)
-		return
+		return true
 	}
 
 	err := cp.checkDeleteContainer(e)
@@ -111,10 +110,18 @@ func (cp *Processor) processContainerDelete(e containerEvent.Delete) {
 			zap.String("error", err.Error()),
 		)
 
-		return
+		return false
 	}
 
-	cp.approveDeleteContainer(e)
+	if err := cp.morphClient.NotarySignAndInvokeTX(e.NotaryRequest().MainTransaction); err != nil {
+		cp.log.Error(logs.ContainerCouldNotApproveDeleteContainer,
+			zap.String("error", err.Error()),
+		)
+
+		return false
+	}
+
+	return true
 }
 
 func (cp *Processor) checkDeleteContainer(e containerEvent.Delete) error {
@@ -149,14 +156,6 @@ func (cp *Processor) checkDeleteContainer(e containerEvent.Delete) error {
 	return nil
 }
 
-func (cp *Processor) approveDeleteContainer(e containerEvent.Delete) {
-	if err := cp.morphClient.NotarySignAndInvokeTX(e.NotaryRequest().MainTransaction); err != nil {
-		cp.log.Error(logs.ContainerCouldNotApproveDeleteContainer,
-			zap.String("error", err.Error()),
-		)
-	}
-}
-
 func checkNNS(ctx *putContainerContext, cnr containerSDK.Container) error {
 	// fetch domain info
 	ctx.d = containerSDK.ReadDomain(cnr)

pkg/innerring/processors/container/process_eacl.go

@@ -12,10 +12,10 @@ import (
 	"go.uber.org/zap"
 )
 
-func (cp *Processor) processSetEACL(e containerEvent.SetEACL) {
+func (cp *Processor) processSetEACL(e containerEvent.SetEACL) bool {
 	if !cp.alphabetState.IsAlphabet() {
 		cp.log.Info(logs.ContainerNonAlphabetModeIgnoreSetEACL)
-		return
+		return true
 	}
 
 	err := cp.checkSetEACL(e)
@@ -24,10 +24,17 @@ func (cp *Processor) processSetEACL(e containerEvent.SetEACL) {
 			zap.String("error", err.Error()),
 		)
 
-		return
+		return false
 	}
 
-	cp.approveSetEACL(e)
+	if err := cp.morphClient.NotarySignAndInvokeTX(e.NotaryRequest().MainTransaction); err != nil {
+		cp.log.Error(logs.ContainerCouldNotApproveSetEACL,
+			zap.String("error", err.Error()),
+		)
+		return false
+	}
+
+	return true
 }
 
 func (cp *Processor) checkSetEACL(e containerEvent.SetEACL) error {
@@ -73,11 +80,3 @@ func (cp *Processor) checkSetEACL(e containerEvent.SetEACL) error {
 
 	return nil
 }
-
-func (cp *Processor) approveSetEACL(e containerEvent.SetEACL) {
-	if err := cp.morphClient.NotarySignAndInvokeTX(e.NotaryRequest().MainTransaction); err != nil {
-		cp.log.Error(logs.ContainerCouldNotApproveSetEACL,
-			zap.String("error", err.Error()),
-		)
-	}
-}

pkg/innerring/processors/container/processor.go

@@ -6,6 +6,7 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
 	containercore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/frostfsid"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
 	containerEvent "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event/container"
@@ -40,6 +41,7 @@ type (
 	// Processor of events produced by container contract in the sidechain.
 	Processor struct {
 		log           *logger.Logger
+		metrics       metrics.Register
 		pool          *ants.Pool
 		alphabetState AlphabetState
 		cnrClient     ContClient // notary must be enabled
@@ -51,6 +53,7 @@ type (
 	// Params of the processor constructor.
 	Params struct {
 		Log             *logger.Logger
+		Metrics         metrics.Register
 		PoolSize        int
 		AlphabetState   AlphabetState
 		ContainerClient ContClient
@@ -102,8 +105,14 @@ func New(p *Params) (*Processor, error) {
 		return nil, fmt.Errorf("ir/container: can't create worker pool: %w", err)
 	}
 
+	metricsRegister := p.Metrics
+	if metricsRegister == nil {
+		metricsRegister = metrics.DefaultRegister{}
+	}
+
 	return &Processor{
 		log:           p.Log,
+		metrics:       metricsRegister,
 		pool:          pool,
 		alphabetState: p.AlphabetState,
 		cnrClient:     p.ContainerClient,

pkg/innerring/processors/frostfs/handlers.go

@@ -4,6 +4,7 @@ import (
 	"encoding/hex"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
 	frostfsEvent "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event/frostfs"
 	"github.com/nspcc-dev/neo-go/pkg/util/slice"
@@ -18,7 +19,9 @@ func (np *Processor) handleDeposit(ev event.Event) {
 
 	// send event to the worker pool
 
-	err := np.pool.Submit(func() { np.processDeposit(deposit) })
+	err := processors.SubmitEvent(np.pool, np.metrics, "frostfs_deposit", func() bool {
+		return np.processDeposit(deposit)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		np.log.Warn(logs.FrostFSFrostfsProcessorWorkerPoolDrained,
@@ -34,7 +37,9 @@ func (np *Processor) handleWithdraw(ev event.Event) {
 
 	// send event to the worker pool
 
-	err := np.pool.Submit(func() { np.processWithdraw(withdraw) })
+	err := processors.SubmitEvent(np.pool, np.metrics, "frostfs_withdraw", func() bool {
+		return np.processWithdraw(withdraw)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		np.log.Warn(logs.FrostFSFrostfsProcessorWorkerPoolDrained,
@@ -50,7 +55,9 @@ func (np *Processor) handleCheque(ev event.Event) {
 
 	// send event to the worker pool
 
-	err := np.pool.Submit(func() { np.processCheque(cheque) })
+	err := processors.SubmitEvent(np.pool, np.metrics, "frostfs_cheque", func() bool {
+		return np.processCheque(cheque)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		np.log.Warn(logs.FrostFSFrostfsProcessorWorkerPoolDrained,
@@ -67,7 +74,9 @@ func (np *Processor) handleConfig(ev event.Event) {
 
 	// send event to the worker pool
 
-	err := np.pool.Submit(func() { np.processConfig(cfg) })
+	err := processors.SubmitEvent(np.pool, np.metrics, "frostfs_config", func() bool {
+		return np.processConfig(cfg)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		np.log.Warn(logs.FrostFSFrostfsProcessorWorkerPoolDrained,
@@ -83,7 +92,9 @@ func (np *Processor) handleBind(ev event.Event) {
 
 	// send event to the worker pool
 
-	err := np.pool.Submit(func() { np.processBind(e, true) })
+	err := processors.SubmitEvent(np.pool, np.metrics, "frostfs_bind", func() bool {
+		return np.processBind(e, true)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		np.log.Warn(logs.FrostFSFrostfsProcessorWorkerPoolDrained,
@@ -99,7 +110,9 @@ func (np *Processor) handleUnbind(ev event.Event) {
 
 	// send event to the worker pool
 
-	err := np.pool.Submit(func() { np.processBind(e, false) })
+	err := processors.SubmitEvent(np.pool, np.metrics, "frostfs_unbind", func() bool {
+		return np.processBind(e, false)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		np.log.Warn(logs.FrostFSFrostfsProcessorWorkerPoolDrained,

pkg/innerring/processors/frostfs/process_assets.go

@@ -15,10 +15,10 @@ const (
 
 // Process deposit event by invoking a balance contract and sending native
 // gas in the sidechain.
-func (np *Processor) processDeposit(deposit frostfsEvent.Deposit) {
+func (np *Processor) processDeposit(deposit frostfsEvent.Deposit) bool {
 	if !np.alphabetState.IsAlphabet() {
 		np.log.Info(logs.FrostFSNonAlphabetModeIgnoreDeposit)
-		return
+		return true
 	}
 
 	prm := balance.MintPrm{}
@@ -49,7 +49,7 @@ func (np *Processor) processDeposit(deposit frostfsEvent.Deposit) {
 			zap.Uint64("last_emission", val),
 			zap.Uint64("current_epoch", curEpoch))
 
-		return
+		return false
 	}
 
 	// get gas balance of the node
@@ -57,7 +57,7 @@ func (np *Processor) processDeposit(deposit frostfsEvent.Deposit) {
 	balance, err := np.morphClient.GasBalance()
 	if err != nil {
 		np.log.Error(logs.FrostFSCantGetGasBalanceOfTheNode, zap.Error(err))
-		return
+		return false
 	}
 
 	if balance < np.gasBalanceThreshold {
@@ -65,7 +65,7 @@ func (np *Processor) processDeposit(deposit frostfsEvent.Deposit) {
 			zap.Int64("balance", balance),
 			zap.Int64("threshold", np.gasBalanceThreshold))
 
-		return
+		return false
 	}
 
 	err = np.morphClient.TransferGas(receiver, np.mintEmitValue)
@@ -73,24 +73,26 @@ func (np *Processor) processDeposit(deposit frostfsEvent.Deposit) {
 		np.log.Error(logs.FrostFSCantTransferNativeGasToReceiver,
 			zap.String("error", err.Error()))
 
-		return
+		return false
 	}
 
 	np.mintEmitCache.Add(receiver.String(), curEpoch)
+
+	return true
 }
 
 // Process withdraw event by locking assets in the balance account.
-func (np *Processor) processWithdraw(withdraw frostfsEvent.Withdraw) {
+func (np *Processor) processWithdraw(withdraw frostfsEvent.Withdraw) bool {
 	if !np.alphabetState.IsAlphabet() {
 		np.log.Info(logs.FrostFSNonAlphabetModeIgnoreWithdraw)
-		return
+		return true
 	}
 
 	// create lock account
 	lock, err := util.Uint160DecodeBytesBE(withdraw.ID()[:util.Uint160Size])
 	if err != nil {
 		np.log.Error(logs.FrostFSCantCreateLockAccount, zap.Error(err))
-		return
+		return false
 	}
 
 	curEpoch := np.epochState.EpochCounter()
@@ -106,15 +108,18 @@ func (np *Processor) processWithdraw(withdraw frostfsEvent.Withdraw) {
 	err = np.balanceClient.Lock(prm)
 	if err != nil {
 		np.log.Error(logs.FrostFSCantLockAssetsForWithdraw, zap.Error(err))
+		return false
 	}
+
+	return true
 }
 
 // Process cheque event by transferring assets from the lock account back to
 // the reserve account.
-func (np *Processor) processCheque(cheque frostfsEvent.Cheque) {
+func (np *Processor) processCheque(cheque frostfsEvent.Cheque) bool {
 	if !np.alphabetState.IsAlphabet() {
 		np.log.Info(logs.FrostFSNonAlphabetModeIgnoreCheque)
-		return
+		return true
 	}
 
 	prm := balance.BurnPrm{}
@@ -126,5 +131,8 @@ func (np *Processor) processCheque(cheque frostfsEvent.Cheque) {
 	err := np.balanceClient.Burn(prm)
 	if err != nil {
 		np.log.Error(logs.FrostFSCantTransferAssetsToFedContract, zap.Error(err))
+		return false
 	}
+
+	return true
 }

pkg/innerring/processors/frostfs/process_bind.go

@@ -18,10 +18,10 @@ type bindCommon interface {
 	TxHash() util.Uint256
 }
 
-func (np *Processor) processBind(e bindCommon, bind bool) {
+func (np *Processor) processBind(e bindCommon, bind bool) bool {
 	if !np.alphabetState.IsAlphabet() {
 		np.log.Info(logs.FrostFSNonAlphabetModeIgnoreBind)
-		return
+		return true
 	}
 
 	c := &bindCommonContext{
@@ -36,10 +36,10 @@ func (np *Processor) processBind(e bindCommon, bind bool) {
 			zap.String("error", err.Error()),
 		)
 
-		return
+		return false
 	}
 
-	np.approveBindCommon(c)
+	return np.approveBindCommon(c) == nil
 }
 
 type bindCommonContext struct {
@@ -70,7 +70,7 @@ func (np *Processor) checkBindCommon(e *bindCommonContext) error {
 	return nil
 }
 
-func (np *Processor) approveBindCommon(e *bindCommonContext) {
+func (np *Processor) approveBindCommon(e *bindCommonContext) error {
 	// calculate wallet address
 	scriptHash := e.User()
 
@@ -80,7 +80,7 @@ func (np *Processor) approveBindCommon(e *bindCommonContext) {
 			zap.String("error", err.Error()),
 		)
 
-		return
+		return err
 	}
 
 	var id user.ID
@@ -104,4 +104,6 @@ func (np *Processor) approveBindCommon(e *bindCommonContext) {
 		np.log.Error(fmt.Sprintf("could not approve %s", typ),
 			zap.String("error", err.Error()))
 	}
+
+	return err
 }

pkg/innerring/processors/frostfs/process_config.go

@@ -9,10 +9,10 @@ import (
 
 // Process config event by setting configuration value from the mainchain in
 // the sidechain.
-func (np *Processor) processConfig(config frostfsEvent.Config) {
+func (np *Processor) processConfig(config frostfsEvent.Config) bool {
 	if !np.alphabetState.IsAlphabet() {
 		np.log.Info(logs.FrostFSNonAlphabetModeIgnoreConfig)
-		return
+		return true
 	}
 
 	prm := nmClient.SetConfigPrm{}
@@ -25,5 +25,8 @@ func (np *Processor) processConfig(config frostfsEvent.Config) {
 	err := np.netmapClient.SetConfig(prm)
 	if err != nil {
 		np.log.Error(logs.FrostFSCantRelaySetConfigEvent, zap.Error(err))
+		return false
 	}
+
+	return true
 }

pkg/innerring/processors/frostfs/processor.go

@@ -6,6 +6,7 @@ import (
 	"sync"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/balance"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/frostfsid"
 	nmClient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/netmap"
@@ -58,6 +59,7 @@ type (
 	// Processor of events produced by frostfs contract in main net.
 	Processor struct {
 		log                 *logger.Logger
+		metrics             metrics.Register
 		pool                *ants.Pool
 		frostfsContract     util.Uint160
 		balanceClient       BalanceClient
@@ -77,6 +79,7 @@ type (
 	// Params of the processor constructor.
 	Params struct {
 		Log                 *logger.Logger
+		Metrics             metrics.Register
 		PoolSize            int
 		FrostFSContract     util.Uint160
 		FrostFSIDClient     IDClient
@@ -129,8 +132,14 @@ func New(p *Params) (*Processor, error) {
 		return nil, fmt.Errorf("ir/frostfs: can't create LRU cache for gas emission: %w", err)
 	}
 
+	metricsRegister := p.Metrics
+	if metricsRegister == nil {
+		metricsRegister = metrics.DefaultRegister{}
+	}
+
 	return &Processor{
 		log:                 p.Log,
+		metrics:             metricsRegister,
 		pool:                pool,
 		frostfsContract:     p.FrostFSContract,
 		balanceClient:       p.BalanceClient,

pkg/innerring/processors/governance/handlers.go

@@ -2,6 +2,7 @@ package governance
 
 import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event/rolemanagement"
 	"github.com/nspcc-dev/neo-go/pkg/core/native"
@@ -35,7 +36,9 @@ func (gp *Processor) HandleAlphabetSync(e event.Event) {
 
 	// send event to the worker pool
 
-	err := gp.pool.Submit(func() { gp.processAlphabetSync(hash) })
+	err := processors.SubmitEvent(gp.pool, gp.metrics, "alphabet_sync", func() bool {
+		return gp.processAlphabetSync(hash)
+	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		gp.log.Warn(logs.GovernanceGovernanceWorkerPoolDrained,

pkg/innerring/processors/governance/process_update.go

@@ -18,36 +18,36 @@ const (
 	alphabetUpdateIDPrefix = "AlphabetUpdate"
 )
 
-func (gp *Processor) processAlphabetSync(txHash util.Uint256) {
+func (gp *Processor) processAlphabetSync(txHash util.Uint256) bool {
 	if !gp.alphabetState.IsAlphabet() {
 		gp.log.Info(logs.GovernanceNonAlphabetModeIgnoreAlphabetSync)
-		return
+		return true
 	}
 
 	mainnetAlphabet, err := gp.mainnetClient.NeoFSAlphabetList()
 	if err != nil {
 		gp.log.Error(logs.GovernanceCantFetchAlphabetListFromMainNet,
 			zap.String("error", err.Error()))
-		return
+		return false
 	}
 
 	sidechainAlphabet, err := gp.morphClient.Committee()
 	if err != nil {
 		gp.log.Error(logs.GovernanceCantFetchAlphabetListFromSideChain,
 			zap.String("error", err.Error()))
-		return
+		return false
 	}
 
 	newAlphabet, err := newAlphabetList(sidechainAlphabet, mainnetAlphabet)
 	if err != nil {
 		gp.log.Error(logs.GovernanceCantMergeAlphabetListsFromMainNetAndSideChain,
 			zap.String("error", err.Error()))
-		return
+		return false
 	}
 
 	if newAlphabet == nil {
 		gp.log.Info(logs.GovernanceNoGovernanceUpdateAlphabetListHasNotBeenChanged)
-		return
+		return true
 	}
 
 	gp.log.Info(logs.GovernanceAlphabetListHasBeenChangedStartingUpdate,
@@ -77,6 +77,8 @@ func (gp *Processor) processAlphabetSync(txHash util.Uint256) {
 	gp.updateFrostFSContractInMainnet(newAlphabet)
 
 	gp.log.Info(logs.GovernanceFinishedAlphabetListUpdate)
+
+	return true
 }
 
 func prettyKeys(keys keys.PublicKeys) string {

pkg/innerring/processors/governance/processor.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
 	frostfscontract "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/frostfs"
 	nmClient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/netmap"
@@ -75,6 +76,7 @@ type (
 	// Processor of events related to governance in the network.
 	Processor struct {
 		log           *logger.Logger
+		metrics       metrics.Register
 		pool          *ants.Pool
 		frostfsClient FrostFSClient
 		netmapClient  NetmapClient
@@ -93,6 +95,7 @@ type (
 	// Params of the processor constructor.
 	Params struct {
 		Log     *logger.Logger
+		Metrics metrics.Register
 
 		AlphabetState AlphabetState
 		EpochState    EpochState
@@ -130,11 +133,17 @@ func New(p *Params) (*Processor, error) {
 		return nil, fmt.Errorf("ir/governance: can't create worker pool: %w", err)
 	}
 
+	metricsRegister := p.Metrics
+	if metricsRegister == nil {
+		metricsRegister = metrics.DefaultRegister{}
+	}
+
 	// result is cached by neo-go, so we can pre-calc it
 	designate := p.MainnetClient.GetDesignateHash()
 
 	return &Processor{
 		log:           p.Log,
+		metrics:       metricsRegister,
 		pool:          pool,
 		frostfsClient: p.FrostFSClient,
 		netmapClient:  p.NetmapClient,

pkg/innerring/processors/netmap/handlers.go

@@ -4,6 +4,7 @@ import (
 	"encoding/hex"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors"
 	timerEvent "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/timers"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
 	netmapEvent "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event/netmap"
@@ -16,7 +17,7 @@ func (np *Processor) HandleNewEpochTick(ev event.Event) {
 
 	// send an event to the worker pool
 
-	err := np.pool.Submit(func() { np.processNewEpochTick() })
+	err := processors.SubmitEvent(np.pool, np.metrics, "netmap_new_epoch_tick", np.processNewEpochTick)
 	if err != nil {
 		// there system can be moved into controlled degradation stage
 		np.log.Warn(logs.NetmapNetmapWorkerPoolDrained,
@@ -32,8 +33,8 @@ func (np *Processor) handleNewEpoch(ev event.Event) {
 
 	// send an event to the worker pool
 
-	err := np.pool.Submit(func() {
+	err := processors.SubmitEvent(np.pool, np.metrics, "netmap_new_epoch", func() bool {
-		np.processNewEpoch(epochEvent)
+		return np.processNewEpoch(epochEvent)
 	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
@@ -51,8 +52,8 @@ func (np *Processor) handleAddPeer(ev event.Event) {
 
 	// send an event to the worker pool
 
-	err := np.pool.Submit(func() {
+	err := processors.SubmitEvent(np.pool, np.metrics, "netmap_add_peer", func() bool {
-		np.processAddPeer(newPeer)
+		return np.processAddPeer(newPeer)
 	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
@@ -69,8 +70,8 @@ func (np *Processor) handleUpdateState(ev event.Event) {
 
 	// send event to the worker pool
 
-	err := np.pool.Submit(func() {
+	err := processors.SubmitEvent(np.pool, np.metrics, "netmap_update_peer", func() bool {
-		np.processUpdatePeer(updPeer)
+		return np.processUpdatePeer(updPeer)
 	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage
@@ -91,8 +92,8 @@ func (np *Processor) handleCleanupTick(ev event.Event) {
 	np.log.Info(logs.NetmapTick, zap.String("type", "netmap cleaner"))
 
 	// send event to the worker pool
-	err := np.pool.Submit(func() {
+	err := processors.SubmitEvent(np.pool, np.metrics, "netmap_cleanup_tick", func() bool {
-		np.processNetmapCleanupTick(cleanup)
+		return np.processNetmapCleanupTick(cleanup)
 	})
 	if err != nil {
 		// there system can be moved into controlled degradation stage

pkg/innerring/processors/netmap/process_cleanup.go

@@ -7,11 +7,11 @@ import (
 	"go.uber.org/zap"
 )
 
-func (np *Processor) processNetmapCleanupTick(ev netmapCleanupTick) {
+func (np *Processor) processNetmapCleanupTick(ev netmapCleanupTick) bool {
 	if !np.alphabetState.IsAlphabet() {
 		np.log.Info(logs.NetmapNonAlphabetModeIgnoreNewNetmapCleanupTick)
 
-		return
+		return true
 	}
 
 	err := np.netmapSnapshot.forEachRemoveCandidate(ev.epoch, func(s string) error {
@@ -47,5 +47,8 @@ func (np *Processor) processNetmapCleanupTick(ev netmapCleanupTick) {
 	if err != nil {
 		np.log.Warn(logs.NetmapCantIterateOnNetmapCleanerCache,
 			zap.String("error", err.Error()))
+		return false
 	}
+
+	return true
 }

pkg/innerring/processors/netmap/process_epoch.go

@@ -10,7 +10,7 @@ import (
 
 // Process new epoch notification by setting global epoch value and resetting
 // local epoch timer.
-func (np *Processor) processNewEpoch(ev netmapEvent.NewEpoch) {
+func (np *Processor) processNewEpoch(ev netmapEvent.NewEpoch) bool {
 	epoch := ev.EpochNumber()
 
 	epochDuration, err := np.netmapClient.EpochDuration()
@@ -41,7 +41,7 @@ func (np *Processor) processNewEpoch(ev netmapEvent.NewEpoch) {
 		np.log.Warn(logs.NetmapCantGetNetmapSnapshotToPerformCleanup,
 			zap.String("error", err.Error()))
 
-		return
+		return false
 	}
 
 	prm := cntClient.StartEstimationPrm{}
@@ -63,13 +63,15 @@ func (np *Processor) processNewEpoch(ev netmapEvent.NewEpoch) {
 	np.handleCleanupTick(netmapCleanupTick{epoch: epoch, txHash: ev.TxHash()})
 	np.handleAlphabetSync(governance.NewSyncEvent(ev.TxHash()))
 	np.handleNotaryDeposit(ev)
+
+	return true
 }
 
 // Process new epoch tick by invoking new epoch method in network map contract.
-func (np *Processor) processNewEpochTick() {
+func (np *Processor) processNewEpochTick() bool {
 	if !np.alphabetState.IsAlphabet() {
 		np.log.Info(logs.NetmapNonAlphabetModeIgnoreNewEpochTick)
-		return
+		return true
 	}
 
 	nextEpoch := np.epochState.EpochCounter() + 1
@@ -78,5 +80,8 @@ func (np *Processor) processNewEpochTick() {
 	err := np.netmapClient.NewEpoch(nextEpoch, false)
 	if err != nil {
 		np.log.Error(logs.NetmapCantInvokeNetmapNewEpoch, zap.Error(err))
+		return false
 	}
+
+	return true
 }

pkg/innerring/processors/netmap/process_peers.go

@@ -12,10 +12,10 @@ import (
 
 // Process add peer notification by sanity check of new node
 // local epoch timer.
-func (np *Processor) processAddPeer(ev netmapEvent.AddPeer) {
+func (np *Processor) processAddPeer(ev netmapEvent.AddPeer) bool {
 	if !np.alphabetState.IsAlphabet() {
 		np.log.Info(logs.NetmapNonAlphabetModeIgnoreNewPeerNotification)
-		return
+		return true
 	}
 
 	// check if notary transaction is valid, see #976
@@ -26,7 +26,7 @@ func (np *Processor) processAddPeer(ev netmapEvent.AddPeer) {
 			zap.String("method", "netmap.AddPeer"),
 			zap.String("hash", tx.Hash().StringLE()),
 			zap.Error(err))
-		return
+		return false
 	}
 
 	// unmarshal node info
@@ -34,7 +34,7 @@ func (np *Processor) processAddPeer(ev netmapEvent.AddPeer) {
 	if err := nodeInfo.Unmarshal(ev.Node()); err != nil {
 		// it will be nice to have tx id at event structure to log it
 		np.log.Warn(logs.NetmapCantParseNetworkMapCandidate)
-		return
+		return false
 	}
 
 	// validate and update node info
@@ -44,7 +44,7 @@ func (np *Processor) processAddPeer(ev netmapEvent.AddPeer) {
 			zap.String("error", err.Error()),
 		)
 
-		return
+		return false
 	}
 
 	// sort attributes to make it consistent
@@ -81,15 +81,18 @@ func (np *Processor) processAddPeer(ev netmapEvent.AddPeer) {
 
 		if err != nil {
 			np.log.Error(logs.NetmapCantInvokeNetmapAddPeer, zap.Error(err))
+			return false
 		}
 	}
+
+	return true
 }
 
 // Process update peer notification by sending approval tx to the smart contract.
-func (np *Processor) processUpdatePeer(ev netmapEvent.UpdatePeer) {
+func (np *Processor) processUpdatePeer(ev netmapEvent.UpdatePeer) bool {
 	if !np.alphabetState.IsAlphabet() {
 		np.log.Info(logs.NetmapNonAlphabetModeIgnoreUpdatePeerNotification)
-		return
+		return true
 	}
 
 	// flag node to remove from local view, so it can be re-bootstrapped
@@ -105,11 +108,14 @@ func (np *Processor) processUpdatePeer(ev netmapEvent.UpdatePeer) {
 				zap.Error(err),
 			)
 
-			return
+			return false
 		}
 	}
 
 	if err = np.netmapClient.MorphNotarySignAndInvokeTX(ev.NotaryRequest().MainTransaction); err != nil {
 		np.log.Error(logs.NetmapCantInvokeNetmapUpdatePeer, zap.Error(err))
+		return false
 	}
+
+	return true
 }

pkg/innerring/processors/netmap/processor.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/metrics"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/processors/netmap/nodevalidation/state"
 	cntClient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client/container"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/event"
@@ -72,6 +73,7 @@ type (
 	// and new epoch ticker, because it is related to contract.
 	Processor struct {
 		log           *logger.Logger
+		metrics       metrics.Register
 		pool          *ants.Pool
 		epochTimer    EpochTimerReseter
 		epochState    EpochState
@@ -93,6 +95,7 @@ type (
 	// Params of the processor constructor.
 	Params struct {
 		Log              *logger.Logger
+		Metrics          metrics.Register
 		PoolSize         int
 		NetmapClient     Client
 		EpochTimer       EpochTimerReseter
@@ -145,8 +148,14 @@ func New(p *Params) (*Processor, error) {
 		return nil, fmt.Errorf("ir/netmap: can't create worker pool: %w", err)
 	}
 
+	metricsRegister := p.Metrics
+	if metricsRegister == nil {
+		metricsRegister = metrics.DefaultRegister{}
+	}
+
 	return &Processor{
 		log:            p.Log,
+		metrics:        metricsRegister,
 		pool:           pool,
 		epochTimer:     p.EpochTimer,
 		epochState:     p.EpochState,

pkg/innerring/processors/util.go

@@ -0,0 +1,16 @@
+package processors
+
+import (
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring/metrics"
+	"github.com/panjf2000/ants/v2"
+)
+
+func SubmitEvent(pool *ants.Pool, metrics metrics.Register, eventLabel string, eventProcessor func() bool) error {
+	return pool.Submit(func() {
+		start := time.Now()
+		success := eventProcessor()
+		metrics.AddEvent(time.Since(start), eventLabel, success)
+	})
+}

pkg/metrics/innerring.go

@@ -1,13 +1,23 @@
 package metrics
 
-import "github.com/prometheus/client_golang/prometheus"
+import (
+	"strconv"
+	"time"
 
-const innerRingSubsystem = "ir"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+const (
+	innerRingSubsystem    = "ir"
+	innerRingLabelSuccess = "success"
+	innerRingLabelType    = "type"
+)
 
 // InnerRingServiceMetrics contains metrics collected by inner ring.
 type InnerRingServiceMetrics struct {
 	epoch         metric[prometheus.Gauge]
 	health        metric[prometheus.Gauge]
+	eventDuration metric[*prometheus.HistogramVec]
 }
 
 // NewInnerRingMetrics returns new instance of metrics collectors for inner ring.
@@ -25,14 +35,22 @@ func NewInnerRingMetrics() *InnerRingServiceMetrics {
 			Name:      "health",
 			Help:      "Current inner-ring node state.",
 		})
+		eventDuration = newHistogramVec(prometheus.HistogramOpts{
+			Namespace: namespace,
+			Subsystem: innerRingSubsystem,
+			Name:      "event_duration_seconds",
+			Help:      "Duration of processing of inner-ring events",
+		}, []string{innerRingLabelType, innerRingLabelSuccess})
 	)
 
 	mustRegister(epoch)
 	mustRegister(health)
+	mustRegister(eventDuration)
 
 	return &InnerRingServiceMetrics{
 		epoch:         epoch,
 		health:        health,
+		eventDuration: eventDuration,
 	}
 }
 
@@ -45,3 +63,10 @@ func (m InnerRingServiceMetrics) SetEpoch(epoch uint64) {
 func (m InnerRingServiceMetrics) SetHealth(s int32) {
 	m.health.value.Set(float64(s))
 }
+
+func (m InnerRingServiceMetrics) AddEvent(d time.Duration, typ string, success bool) {
+	m.eventDuration.value.With(prometheus.Labels{
+		innerRingLabelType:    typ,
+		innerRingLabelSuccess: strconv.FormatBool(success),
+	}).Observe(d.Seconds())
+}