validator metrics

consensus/metrics.go

@@ -7,11 +7,20 @@ import "github.com/go-kit/kit/metrics/discard"
 type Metrics struct {
 	// height of the chain
 	Height metrics.Counter
+	// number of validators who signed
+	Validators metrics.Gauge
+	// number of validators who did not sign
+	MissingValidators metrics.Gauge
+	// number of validators who tried to double sign
+	ByzantineValidators metrics.Gauge
 }
 
 // NopMetrics returns no-op Metrics.
 func NopMetrics() *Metrics {
 	return &Metrics{
-		Height: discard.NewCounter(),
+		Height:              discard.NewCounter(),
+		Validators:          discard.NewGauge(),
+		MissingValidators:   discard.NewGauge(),
+		ByzantineValidators: discard.NewGauge(),
 	}
 }

consensus/state.go

@@ -1281,6 +1281,8 @@ func (cs *ConsensusState) finalizeCommit(height int64) {
 
 	fail.Fail() // XXX
 
+	cs.recordValidatorMetrics(height, block)
+
 	// NewHeightStep!
 	cs.updateToState(stateCopy)
 
@@ -1296,6 +1298,26 @@ func (cs *ConsensusState) finalizeCommit(height int64) {
 	// * cs.StartTime is set to when we will start round0.
 }
 
+func (cs *ConsensusState) recordValidatorMetrics(height int64, block *types.Block) {
+	heightStr := fmt.Sprintf("%d", height)
+
+	cs.metrics.Validators.With("height", heightStr).Set(float64(cs.Validators.Size()))
+
+	missingValidators := 0
+	for i := range cs.Validators.Validators {
+		var vote *types.Vote
+		if i < len(block.LastCommit.Precommits) {
+			vote = block.LastCommit.Precommits[i]
+		}
+		if vote == nil {
+			missingValidators++
+		}
+	}
+	cs.metrics.MissingValidators.With("height", heightStr).Set(float64(missingValidators))
+
+	cs.metrics.ByzantineValidators.With("height", heightStr).Set(float64(len(block.Evidence.Evidence)))
+}
+
 //-----------------------------------------------------------------------------
 
 func (cs *ConsensusState) defaultSetProposal(proposal *types.Proposal) error {