metrics: Add additional metrics to p2p and consensus (#2425)

* Add additional metrics to p2p and consensus
Partially addresses https://github.com/cosmos/cosmos-sdk/issues/2169.
* WIP
* Updates from code review
* Updates from code review
* Add instrumentation namespace to configuration
* Fix test failure
* Updates from code review
* Add quotes
* Add atomic load
* Use storeint64
* Use addInt64 in writePacketMsgTo

CHANGELOG_PENDING.md

@@ -14,6 +14,8 @@ BREAKING CHANGES:
 FEATURES:
 
 IMPROVEMENTS:
+- [consensus] [\#2169](https://github.com/cosmos/cosmos-sdk/issues/2169) add additional metrics
+- [p2p] [\#2169](https://github.com/cosmos/cosmos-sdk/issues/2169) add additional metrics
 
 BUG FIXES:
 - [node] \#2434 Make node respond to signal interrupts while sleeping for genesis time

config/config.go

@@ -634,6 +634,9 @@ type InstrumentationConfig struct {
 	// you increase your OS limits.
 	// 0 - unlimited.
 	MaxOpenConnections int `mapstructure:"max_open_connections"`
+
+	// Tendermint instrumentation namespace.
+	Namespace string `mapstructure:"namespace"`
 }
 
 // DefaultInstrumentationConfig returns a default configuration for metrics
@@ -643,6 +646,7 @@ func DefaultInstrumentationConfig() *InstrumentationConfig {
 		Prometheus:           false,
 		PrometheusListenAddr: ":26660",
 		MaxOpenConnections:   3,
+		Namespace:            "tendermint",
 	}
 }
 

config/toml.go

@@ -284,6 +284,9 @@ prometheus_listen_addr = "{{ .Instrumentation.PrometheusListenAddr }}"
 # you increase your OS limits.
 # 0 - unlimited.
 max_open_connections = {{ .Instrumentation.MaxOpenConnections }}
+
+# Instrumentation namespace
+namespace = "{{ .Instrumentation.Namespace }}"
 `
 
 /****** these are for test settings ***********/

consensus/metrics.go

@@ -8,6 +8,8 @@ import (
 	stdprometheus "github.com/prometheus/client_golang/prometheus"
 )
 
+const MetricsSubsystem = "consensus"
+
 // Metrics contains metrics exposed by this package.
 type Metrics struct {
 	// Height of the chain.
@@ -38,74 +40,102 @@ type Metrics struct {
 	BlockSizeBytes metrics.Gauge
 	// Total number of transactions.
 	TotalTxs metrics.Gauge
+	// The latest block height.
+	CommittedHeight metrics.Gauge
+	// Whether or not a node is fast syncing. 1 if yes, 0 if no.
+	FastSyncing metrics.Gauge
 }
 
 // PrometheusMetrics returns Metrics build using Prometheus client library.
-func PrometheusMetrics() *Metrics {
+func PrometheusMetrics(namespace string) *Metrics {
 	return &Metrics{
 		Height: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "height",
 			Help:      "Height of the chain.",
 		}, []string{}),
 		Rounds: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "rounds",
 			Help:      "Number of rounds.",
 		}, []string{}),
 
 		Validators: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "validators",
 			Help:      "Number of validators.",
 		}, []string{}),
 		ValidatorsPower: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "validators_power",
 			Help:      "Total power of all validators.",
 		}, []string{}),
 		MissingValidators: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "missing_validators",
 			Help:      "Number of validators who did not sign.",
 		}, []string{}),
 		MissingValidatorsPower: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "missing_validators_power",
 			Help:      "Total power of the missing validators.",
 		}, []string{}),
 		ByzantineValidators: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "byzantine_validators",
 			Help:      "Number of validators who tried to double sign.",
 		}, []string{}),
 		ByzantineValidatorsPower: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "byzantine_validators_power",
 			Help:      "Total power of the byzantine validators.",
 		}, []string{}),
 
 		BlockIntervalSeconds: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "block_interval_seconds",
 			Help:      "Time between this and the last block.",
 		}, []string{}),
 
 		NumTxs: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "num_txs",
 			Help:      "Number of transactions.",
 		}, []string{}),
 		BlockSizeBytes: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "block_size_bytes",
 			Help:      "Size of the block.",
 		}, []string{}),
 		TotalTxs: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "consensus",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "total_txs",
 			Help:      "Total number of transactions.",
 		}, []string{}),
+		CommittedHeight: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
+			Name:      "latest_block_height",
+			Help:      "The latest block height.",
+		}, []string{}),
+		FastSyncing: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
+			Name:      "fast_syncing",
+			Help:      "Whether or not a node is fast syncing. 1 if yes, 0 if no.",
+		}, []string{}),
 	}
 }
 
@@ -125,8 +155,10 @@ func NopMetrics() *Metrics {
 
 		BlockIntervalSeconds: discard.NewGauge(),
 
-		NumTxs:         discard.NewGauge(),
-		BlockSizeBytes: discard.NewGauge(),
-		TotalTxs:       discard.NewGauge(),
+		NumTxs:          discard.NewGauge(),
+		BlockSizeBytes:  discard.NewGauge(),
+		TotalTxs:        discard.NewGauge(),
+		CommittedHeight: discard.NewGauge(),
+		FastSyncing:     discard.NewGauge(),
 	}
 }

consensus/reactor.go

@@ -43,16 +43,27 @@ type ConsensusReactor struct {
 	mtx      sync.RWMutex
 	fastSync bool
 	eventBus *types.EventBus
+
+	metrics *Metrics
 }
 
+type ReactorOption func(*ConsensusReactor)
+
 // NewConsensusReactor returns a new ConsensusReactor with the given
 // consensusState.
-func NewConsensusReactor(consensusState *ConsensusState, fastSync bool) *ConsensusReactor {
+func NewConsensusReactor(consensusState *ConsensusState, fastSync bool, options ...ReactorOption) *ConsensusReactor {
 	conR := &ConsensusReactor{
 		conS:     consensusState,
 		fastSync: fastSync,
+		metrics: NopMetrics(),
 	}
+	conR.updateFastSyncingMetric()
 	conR.BaseReactor = *p2p.NewBaseReactor("ConsensusReactor", conR)
+
+	for _, option := range options {
+		option(conR)
+	}
+
 	return conR
 }
 
@@ -98,6 +109,7 @@ func (conR *ConsensusReactor) SwitchToConsensus(state sm.State, blocksSynced int
 	conR.mtx.Lock()
 	conR.fastSync = false
 	conR.mtx.Unlock()
+	conR.metrics.FastSyncing.Set(0)
 
 	if blocksSynced > 0 {
 		// dont bother with the WAL if we fast synced
@@ -850,6 +862,21 @@ func (conR *ConsensusReactor) StringIndented(indent string) string {
 	return s
 }
 
+func (conR *ConsensusReactor) updateFastSyncingMetric() {
+	var fastSyncing float64
+	if conR.fastSync {
+		fastSyncing = 1
+	} else {
+		fastSyncing = 0
+	}
+	conR.metrics.FastSyncing.Set(fastSyncing)
+}
+
+// ReactorMetrics sets the metrics
+func ReactorMetrics(metrics *Metrics) ReactorOption {
+	return func(conR *ConsensusReactor) { conR.metrics = metrics }
+}
+
 //-----------------------------------------------------------------------------
 
 var (

consensus/state.go

@@ -124,8 +124,8 @@ type ConsensusState struct {
 	metrics *Metrics
 }
 
-// CSOption sets an optional parameter on the ConsensusState.
-type CSOption func(*ConsensusState)
+// StateOption sets an optional parameter on the ConsensusState.
+type StateOption func(*ConsensusState)
 
 // NewConsensusState returns a new ConsensusState.
 func NewConsensusState(
@@ -135,7 +135,7 @@ func NewConsensusState(
 	blockStore sm.BlockStore,
 	mempool sm.Mempool,
 	evpool sm.EvidencePool,
-	options ...CSOption,
+	options ...StateOption,
 ) *ConsensusState {
 	cs := &ConsensusState{
 		config:           config,
@@ -185,8 +185,8 @@ func (cs *ConsensusState) SetEventBus(b *types.EventBus) {
 	cs.blockExec.SetEventBus(b)
 }
 
-// WithMetrics sets the metrics.
-func WithMetrics(metrics *Metrics) CSOption {
+// StateMetrics sets the metrics.
+func StateMetrics(metrics *Metrics) StateOption {
 	return func(cs *ConsensusState) { cs.metrics = metrics }
 }
 
@@ -1397,6 +1397,8 @@ func (cs *ConsensusState) recordMetrics(height int64, block *types.Block) {
 	cs.metrics.NumTxs.Set(float64(block.NumTxs))
 	cs.metrics.BlockSizeBytes.Set(float64(block.Size()))
 	cs.metrics.TotalTxs.Set(float64(block.TotalTxs))
+	cs.metrics.CommittedHeight.Set(float64(block.Height))
+
 }
 
 //-----------------------------------------------------------------------------

docs/tendermint-core/configuration.md

@@ -227,4 +227,7 @@ prometheus_listen_addr = ":26660"
 # you increase your OS limits.
 # 0 - unlimited.
 max_open_connections = 3
+
+# Instrumentation namespace
+namespace = "tendermint"
 ```

mempool/metrics.go

@@ -3,7 +3,6 @@ package mempool
 import (
 	"github.com/go-kit/kit/metrics"
 	"github.com/go-kit/kit/metrics/discard"
-
 	prometheus "github.com/go-kit/kit/metrics/prometheus"
 	stdprometheus "github.com/prometheus/client_golang/prometheus"
 )
@@ -16,9 +15,10 @@ type Metrics struct {
 }
 
 // PrometheusMetrics returns Metrics build using Prometheus client library.
-func PrometheusMetrics() *Metrics {
+func PrometheusMetrics(namespace string) *Metrics {
 	return &Metrics{
 		Size: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
+			Namespace: namespace,
 			Subsystem: "mempool",
 			Name:      "size",
 			Help:      "Size of the mempool (number of uncommitted transactions).",

node/node.go

@@ -105,7 +105,7 @@ type MetricsProvider func() (*cs.Metrics, *p2p.Metrics, *mempl.Metrics)
 func DefaultMetricsProvider(config *cfg.InstrumentationConfig) MetricsProvider {
 	return func() (*cs.Metrics, *p2p.Metrics, *mempl.Metrics) {
 		if config.Prometheus {
-			return cs.PrometheusMetrics(), p2p.PrometheusMetrics(), mempl.PrometheusMetrics()
+			return cs.PrometheusMetrics(config.Namespace), p2p.PrometheusMetrics(config.Namespace), mempl.PrometheusMetrics(config.Namespace)
 		}
 		return cs.NopMetrics(), p2p.NopMetrics(), mempl.NopMetrics()
 	}
@@ -303,13 +303,13 @@ func NewNode(config *cfg.Config,
 		blockStore,
 		mempool,
 		evidencePool,
-		cs.WithMetrics(csMetrics),
+		cs.StateMetrics(csMetrics),
 	)
 	consensusState.SetLogger(consensusLogger)
 	if privValidator != nil {
 		consensusState.SetPrivValidator(privValidator)
 	}
-	consensusReactor := cs.NewConsensusReactor(consensusState, fastSync)
+	consensusReactor := cs.NewConsensusReactor(consensusState, fastSync, cs.ReactorMetrics(csMetrics))
 	consensusReactor.SetLogger(consensusLogger)
 
 	eventBus := types.NewEventBus()

p2p/conn/connection.go

@@ -585,9 +585,9 @@ func (c *MConnection) Status() ConnectionStatus {
 		status.Channels[i] = ChannelStatus{
 			ID:                channel.desc.ID,
 			SendQueueCapacity: cap(channel.sendQueue),
-			SendQueueSize:     int(channel.sendQueueSize), // TODO use atomic
+			SendQueueSize:     int(atomic.LoadInt32(&channel.sendQueueSize)),
 			Priority:          channel.desc.Priority,
-			RecentlySent:      channel.recentlySent,
+			RecentlySent:      atomic.LoadInt64(&channel.recentlySent),
 		}
 	}
 	return status
@@ -724,7 +724,7 @@ func (ch *Channel) nextPacketMsg() PacketMsg {
 func (ch *Channel) writePacketMsgTo(w io.Writer) (n int64, err error) {
 	var packet = ch.nextPacketMsg()
 	n, err = cdc.MarshalBinaryWriter(w, packet)
-	ch.recentlySent += n
+	atomic.AddInt64(&ch.recentlySent, n)
 	return
 }
 
@@ -756,7 +756,7 @@ func (ch *Channel) recvPacketMsg(packet PacketMsg) ([]byte, error) {
 func (ch *Channel) updateStats() {
 	// Exponential decay of stats.
 	// TODO: optimize.
-	ch.recentlySent = int64(float64(ch.recentlySent) * 0.8)
+	atomic.StoreInt64(&ch.recentlySent, int64(float64(atomic.LoadInt64(&ch.recentlySent)) * 0.8))
 }
 
 //----------------------------------------

p2p/metrics.go

@@ -3,25 +3,51 @@ package p2p
 import (
 	"github.com/go-kit/kit/metrics"
 	"github.com/go-kit/kit/metrics/discard"
-
 	prometheus "github.com/go-kit/kit/metrics/prometheus"
 	stdprometheus "github.com/prometheus/client_golang/prometheus"
 )
 
+const MetricsSubsystem = "p2p"
+
 // Metrics contains metrics exposed by this package.
 type Metrics struct {
 	// Number of peers.
 	Peers metrics.Gauge
+	// Number of bytes received from a given peer.
+	PeerReceiveBytesTotal metrics.Counter
+	// Number of bytes sent to a given peer.
+	PeerSendBytesTotal metrics.Counter
+	// Pending bytes to be sent to a given peer.
+	PeerPendingSendBytes metrics.Gauge
 }
 
 // PrometheusMetrics returns Metrics build using Prometheus client library.
-func PrometheusMetrics() *Metrics {
+func PrometheusMetrics(namespace string) *Metrics {
 	return &Metrics{
 		Peers: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
-			Subsystem: "p2p",
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
 			Name:      "peers",
 			Help:      "Number of peers.",
 		}, []string{}),
+		PeerReceiveBytesTotal: prometheus.NewCounterFrom(stdprometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
+			Name:      "peer_receive_bytes_total",
+			Help:      "Number of bytes received from a given peer.",
+		}, []string{"peer_id"}),
+		PeerSendBytesTotal: prometheus.NewCounterFrom(stdprometheus.CounterOpts{
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
+			Name:      "peer_send_bytes_total",
+			Help:      "Number of bytes sent to a given peer.",
+		}, []string{"peer_id"}),
+		PeerPendingSendBytes: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
+			Name:      "peer_pending_send_bytes",
+			Help:      "Number of pending bytes to be sent to a given peer.",
+		}, []string{"peer_id"}),
 	}
 }
 
@@ -29,5 +55,8 @@ func PrometheusMetrics() *Metrics {
 func NopMetrics() *Metrics {
 	return &Metrics{
 		Peers: discard.NewGauge(),
+		PeerReceiveBytesTotal: discard.NewCounter(),
+		PeerSendBytesTotal:    discard.NewCounter(),
+		PeerPendingSendBytes:  discard.NewGauge(),
 	}
 }

p2p/peer.go

@@ -13,6 +13,8 @@ import (
 	tmconn "github.com/tendermint/tendermint/p2p/conn"
 )
 
+const metricsTickerDuration = 10 * time.Second
+
 var testIPSuffix uint32
 
 // Peer is an interface representing a peer connected on a reactor.
@@ -99,8 +101,13 @@ type peer struct {
 
 	// User data
 	Data *cmn.CMap
+
+	metrics *Metrics
+	metricsTicker *time.Ticker
 }
 
+type PeerOption func(*peer)
+
 func newPeer(
 	pc peerConn,
 	mConfig tmconn.MConnConfig,
@@ -108,12 +115,15 @@ func newPeer(
 	reactorsByCh map[byte]Reactor,
 	chDescs []*tmconn.ChannelDescriptor,
 	onPeerError func(Peer, interface{}),
+	options ...PeerOption,
 ) *peer {
 	p := &peer{
-		peerConn: pc,
-		nodeInfo: nodeInfo,
-		channels: nodeInfo.Channels,
-		Data:     cmn.NewCMap(),
+		peerConn:      pc,
+		nodeInfo:      nodeInfo,
+		channels:      nodeInfo.Channels,
+		Data:          cmn.NewCMap(),
+		metricsTicker: time.NewTicker(metricsTickerDuration),
+		metrics:       NopMetrics(),
 	}
 
 	p.mconn = createMConnection(
@@ -125,6 +135,9 @@ func newPeer(
 		mConfig,
 	)
 	p.BaseService = *cmn.NewBaseService(nil, "Peer", p)
+	for _, option := range options {
+		option(p)
+	}
 
 	return p
 }
@@ -143,12 +156,18 @@ func (p *peer) OnStart() error {
 	if err := p.BaseService.OnStart(); err != nil {
 		return err
 	}
-	err := p.mconn.Start()
-	return err
+
+	if err := p.mconn.Start(); err != nil {
+		return err
+	}
+
+	go p.metricsReporter()
+	return nil
 }
 
 // OnStop implements BaseService.
 func (p *peer) OnStop() {
+	p.metricsTicker.Stop()
 	p.BaseService.OnStop()
 	p.mconn.Stop() // stop everything and close the conn
 }
@@ -200,7 +219,11 @@ func (p *peer) Send(chID byte, msgBytes []byte) bool {
 	} else if !p.hasChannel(chID) {
 		return false
 	}
-	return p.mconn.Send(chID, msgBytes)
+	res := p.mconn.Send(chID, msgBytes)
+	if res {
+		p.metrics.PeerSendBytesTotal.With("peer-id", string(p.ID())).Add(float64(len(msgBytes)))
+	}
+	return res
 }
 
 // TrySend msg bytes to the channel identified by chID byte. Immediately returns
@@ -211,7 +234,11 @@ func (p *peer) TrySend(chID byte, msgBytes []byte) bool {
 	} else if !p.hasChannel(chID) {
 		return false
 	}
-	return p.mconn.TrySend(chID, msgBytes)
+	res := p.mconn.TrySend(chID, msgBytes)
+	if res {
+		p.metrics.PeerSendBytesTotal.With("peer-id", string(p.ID())).Add(float64(len(msgBytes)))
+	}
+	return res
 }
 
 // Get the data for a given key.
@@ -314,6 +341,29 @@ func (p *peer) String() string {
 	return fmt.Sprintf("Peer{%v %v in}", p.mconn, p.ID())
 }
 
+func PeerMetrics(metrics *Metrics) PeerOption {
+	return func(p *peer) {
+		p.metrics = metrics
+	}
+}
+
+func (p *peer) metricsReporter() {
+	for {
+		select {
+		case <-p.metricsTicker.C:
+			status := p.mconn.Status()
+			var sendQueueSize float64
+			for _, chStatus := range status.Channels {
+				sendQueueSize += float64(chStatus.SendQueueSize)
+			}
+
+			p.metrics.PeerPendingSendBytes.With("peer-id", string(p.ID())).Set(sendQueueSize)
+		case <-p.Quit():
+			return
+		}
+	}
+}
+
 //------------------------------------------------------------------
 // helper funcs
 
@@ -333,6 +383,7 @@ func createMConnection(
 			// which does onPeerError.
 			panic(fmt.Sprintf("Unknown channel %X", chID))
 		}
+		p.metrics.PeerReceiveBytesTotal.With("peer_id", string(p.ID())).Add(float64(len(msgBytes)))
 		reactor.Receive(chID, p, msgBytes)
 	}
 

p2p/peer_set_test.go

@@ -24,6 +24,7 @@ func randPeer(ip net.IP) *peer {
 			ID:         nodeKey.ID(),
 			ListenAddr: fmt.Sprintf("%v.%v.%v.%v:26656", cmn.RandInt()%256, cmn.RandInt()%256, cmn.RandInt()%256, cmn.RandInt()%256),
 		},
+		metrics: NopMetrics(),
 	}
 
 	p.ip = ip

p2p/switch.go

@@ -463,6 +463,7 @@ func (sw *Switch) acceptRoutine() {
 			chDescs:      sw.chDescs,
 			onPeerError:  sw.StopPeerForError,
 			reactorsByCh: sw.reactorsByCh,
+			metrics:      sw.metrics,
 		})
 		if err != nil {
 			switch err.(type) {
@@ -549,6 +550,7 @@ func (sw *Switch) addOutboundPeerWithConfig(
 		onPeerError:  sw.StopPeerForError,
 		persistent:   persistent,
 		reactorsByCh: sw.reactorsByCh,
+		metrics:      sw.metrics,
 	})
 	if err != nil {
 		switch e := err.(type) {

p2p/test_util.go

@@ -29,6 +29,7 @@ func CreateRandomPeer(outbound bool) *peer {
 			ListenAddr: netAddr.DialString(),
 		},
 		mconn: &conn.MConnection{},
+		metrics: NopMetrics(),
 	}
 	p.SetLogger(log.TestingLogger().With("peer", addr))
 	return p

p2p/transport.go

@@ -7,7 +7,7 @@ import (
 	"time"
 
 	"github.com/tendermint/tendermint/config"
-	crypto "github.com/tendermint/tendermint/crypto"
+	"github.com/tendermint/tendermint/crypto"
 	"github.com/tendermint/tendermint/p2p/conn"
 )
 
@@ -41,6 +41,7 @@ type peerConfig struct {
 	onPeerError          func(Peer, interface{})
 	outbound, persistent bool
 	reactorsByCh         map[byte]Reactor
+	metrics              *Metrics
 }
 
 // Transport emits and connects to Peers. The implementation of Peer is left to
@@ -411,6 +412,7 @@ func (mt *MultiplexTransport) wrapPeer(
 		cfg.reactorsByCh,
 		cfg.chDescs,
 		cfg.onPeerError,
+		PeerMetrics(cfg.metrics),
 	)
 
 	// Wait for Peer to Stop so we can cleanup.