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Add stats related channel between consensus state and reactor (#2388)

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This commit is contained in:
Zarko Milosevic 2018-09-21 20:36:48 +02:00 committed by Ethan Buchman
parent f11db8c1b0
commit f99e4010f2
8 changed files with 182 additions and 158 deletions
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3
CHANGELOG_PENDING.md
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@ -33,4 +33,5 @@ IMPROVEMENTS:
BUG FIXES:
- [node] \#2294 Delay starting node until Genesis time
- [rpc] \#2460 StartHTTPAndTLSServer() now passes StartTLS() errors back to the caller rather than hanging forever.
- [consensus] \#2048 Correct peer statistics for marking peer as good
- [rpc] \#2460 StartHTTPAndTLSServer() now passes StartTLS() errors back to the caller rather than hanging forever.

4
cmd/tendermint/commands/init.go
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@ -59,8 +59,8 @@ func initFilesWithConfig(config *cfg.Config) error {
}
genDoc.Validators = []types.GenesisValidator{{
Address: pv.GetPubKey().Address(),
PubKey: pv.GetPubKey(),
Power: 10,
PubKey: pv.GetPubKey(),
Power: 10,
}}
if err := genDoc.SaveAs(genFile); err != nil {

6
cmd/tendermint/commands/testnet.go
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@ -92,9 +92,9 @@ func testnetFiles(cmd *cobra.Command, args []string) error {
pv := privval.LoadFilePV(pvFile)
genVals[i] = types.GenesisValidator{
Address: pv.GetPubKey().Address(),
PubKey: pv.GetPubKey(),
Power: 1,
Name: nodeDirName,
PubKey: pv.GetPubKey(),
Power: 1,
Name: nodeDirName,
}
}

1
consensus/metrics.go
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@ -85,7 +85,6 @@ func PrometheusMetrics() *Metrics {
Help: "Total power of the byzantine validators.",
}, []string{}),
BlockIntervalSeconds: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
Subsystem: "consensus",
Name: "block_interval_seconds",

86
consensus/reactor.go
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@ -29,6 +29,7 @@ const (
maxMsgSize = 1048576 // 1MB; NOTE/TODO: keep in sync with types.PartSet sizes.
blocksToContributeToBecomeGoodPeer = 10000
votesToContributeToBecomeGoodPeer = 10000
)
//-----------------------------------------------------------------------------
@ -60,6 +61,9 @@ func NewConsensusReactor(consensusState *ConsensusState, fastSync bool) *Consens
func (conR *ConsensusReactor) OnStart() error {
conR.Logger.Info("ConsensusReactor ", "fastSync", conR.FastSync())
// start routine that computes peer statistics for evaluating peer quality
go conR.peerStatsRoutine()
conR.subscribeToBroadcastEvents()
if !conR.FastSync() {
@ -258,9 +262,7 @@ func (conR *ConsensusReactor) Receive(chID byte, src p2p.Peer, msgBytes []byte)
ps.ApplyProposalPOLMessage(msg)
case *BlockPartMessage:
ps.SetHasProposalBlockPart(msg.Height, msg.Round, msg.Part.Index)
if numBlocks := ps.RecordBlockPart(msg); numBlocks%blocksToContributeToBecomeGoodPeer == 0 {
conR.Switch.MarkPeerAsGood(src)
}
conR.conS.peerMsgQueue <- msgInfo{msg, src.ID()}
default:
conR.Logger.Error(fmt.Sprintf("Unknown message type %v", reflect.TypeOf(msg)))
@ -280,9 +282,6 @@ func (conR *ConsensusReactor) Receive(chID byte, src p2p.Peer, msgBytes []byte)
ps.EnsureVoteBitArrays(height, valSize)
ps.EnsureVoteBitArrays(height-1, lastCommitSize)
ps.SetHasVote(msg.Vote)
if blocks := ps.RecordVote(msg.Vote); blocks%blocksToContributeToBecomeGoodPeer == 0 {
conR.Switch.MarkPeerAsGood(src)
}
cs.peerMsgQueue <- msgInfo{msg, src.ID()}
@ -794,6 +793,43 @@ OUTER_LOOP:
}
}
func (conR *ConsensusReactor) peerStatsRoutine() {
for {
if !conR.IsRunning() {
conR.Logger.Info("Stopping peerStatsRoutine")
return
}
select {
case msg := <-conR.conS.statsMsgQueue:
// Get peer
peer := conR.Switch.Peers().Get(msg.PeerID)
if peer == nil {
conR.Logger.Debug("Attempt to update stats for non-existent peer",
"peer", msg.PeerID)
continue
}
// Get peer state
ps := peer.Get(types.PeerStateKey).(*PeerState)
switch msg.Msg.(type) {
case *VoteMessage:
if numVotes := ps.RecordVote(); numVotes%votesToContributeToBecomeGoodPeer == 0 {
conR.Switch.MarkPeerAsGood(peer)
}
case *BlockPartMessage:
if numParts := ps.RecordBlockPart(); numParts%blocksToContributeToBecomeGoodPeer == 0 {
conR.Switch.MarkPeerAsGood(peer)
}
}
case <-conR.conS.Quit():
return
case <-conR.Quit():
return
}
}
}
// String returns a string representation of the ConsensusReactor.
// NOTE: For now, it is just a hard-coded string to avoid accessing unprotected shared variables.
// TODO: improve!
@ -836,15 +872,13 @@ type PeerState struct {
// peerStateStats holds internal statistics for a peer.
type peerStateStats struct {
LastVoteHeight int64 `json:"last_vote_height"`
Votes int `json:"votes"`
LastBlockPartHeight int64 `json:"last_block_part_height"`
BlockParts int `json:"block_parts"`
Votes int `json:"votes"`
BlockParts int `json:"block_parts"`
}
func (pss peerStateStats) String() string {
return fmt.Sprintf("peerStateStats{lvh: %d, votes: %d, lbph: %d, blockParts: %d}",
pss.LastVoteHeight, pss.Votes, pss.LastBlockPartHeight, pss.BlockParts)
return fmt.Sprintf("peerStateStats{votes: %d, blockParts: %d}",
pss.Votes, pss.BlockParts)
}
// NewPeerState returns a new PeerState for the given Peer
@ -1080,18 +1114,14 @@ func (ps *PeerState) ensureVoteBitArrays(height int64, numValidators int) {
}
}
// RecordVote updates internal statistics for this peer by recording the vote.
// It returns the total number of votes (1 per block). This essentially means
// the number of blocks for which peer has been sending us votes.
func (ps *PeerState) RecordVote(vote *types.Vote) int {
// RecordVote increments internal votes related statistics for this peer.
// It returns the total number of added votes.
func (ps *PeerState) RecordVote() int {
ps.mtx.Lock()
defer ps.mtx.Unlock()
if ps.Stats.LastVoteHeight >= vote.Height {
return ps.Stats.Votes
}
ps.Stats.LastVoteHeight = vote.Height
ps.Stats.Votes++
return ps.Stats.Votes
}
@ -1104,25 +1134,17 @@ func (ps *PeerState) VotesSent() int {
return ps.Stats.Votes
}
// RecordBlockPart updates internal statistics for this peer by recording the
// block part. It returns the total number of block parts (1 per block). This
// essentially means the number of blocks for which peer has been sending us
// block parts.
func (ps *PeerState) RecordBlockPart(bp *BlockPartMessage) int {
// RecordBlockPart increments internal block part related statistics for this peer.
// It returns the total number of added block parts.
func (ps *PeerState) RecordBlockPart() int {
ps.mtx.Lock()
defer ps.mtx.Unlock()
if ps.Stats.LastBlockPartHeight >= bp.Height {
return ps.Stats.BlockParts
}
ps.Stats.LastBlockPartHeight = bp.Height
ps.Stats.BlockParts++
return ps.Stats.BlockParts
}
// BlockPartsSent returns the number of blocks for which peer has been sending
// us block parts.
// BlockPartsSent returns the number of useful block parts the peer has sent us.
func (ps *PeerState) BlockPartsSent() int {
ps.mtx.Lock()
defer ps.mtx.Unlock()

127
consensus/reactor_test.go
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@ -11,20 +11,16 @@ import (
"testing"
"time"
abcicli "github.com/tendermint/tendermint/abci/client"
"github.com/tendermint/tendermint/abci/client"
"github.com/tendermint/tendermint/abci/example/kvstore"
abci "github.com/tendermint/tendermint/abci/types"
bc "github.com/tendermint/tendermint/blockchain"
cmn "github.com/tendermint/tendermint/libs/common"
cfg "github.com/tendermint/tendermint/config"
dbm "github.com/tendermint/tendermint/libs/db"
"github.com/tendermint/tendermint/libs/log"
mempl "github.com/tendermint/tendermint/mempool"
sm "github.com/tendermint/tendermint/state"
tmtime "github.com/tendermint/tendermint/types/time"
cfg "github.com/tendermint/tendermint/config"
"github.com/tendermint/tendermint/p2p"
p2pdummy "github.com/tendermint/tendermint/p2p/dummy"
sm "github.com/tendermint/tendermint/state"
"github.com/tendermint/tendermint/types"
"github.com/stretchr/testify/assert"
@ -246,110 +242,25 @@ func TestReactorProposalHeartbeats(t *testing.T) {
}, css)
}
// Test we record block parts from other peers
func TestReactorRecordsBlockParts(t *testing.T) {
// create dummy peer
peer := p2pdummy.NewPeer()
ps := NewPeerState(peer).SetLogger(log.TestingLogger())
peer.Set(types.PeerStateKey, ps)
// Test we record stats about votes and block parts from other peers.
func TestReactorRecordsVotesAndBlockParts(t *testing.T) {
N := 4
css := randConsensusNet(N, "consensus_reactor_test", newMockTickerFunc(true), newCounter)
reactors, eventChans, eventBuses := startConsensusNet(t, css, N)
defer stopConsensusNet(log.TestingLogger(), reactors, eventBuses)
// create reactor
css := randConsensusNet(1, "consensus_reactor_records_block_parts_test", newMockTickerFunc(true), newPersistentKVStore)
reactor := NewConsensusReactor(css[0], false) // so we dont start the consensus states
reactor.SetEventBus(css[0].eventBus)
reactor.SetLogger(log.TestingLogger())
sw := p2p.MakeSwitch(cfg.DefaultP2PConfig(), 1, "testing", "123.123.123", func(i int, sw *p2p.Switch) *p2p.Switch { return sw })
reactor.SetSwitch(sw)
err := reactor.Start()
require.NoError(t, err)
defer reactor.Stop()
// wait till everyone makes the first new block
timeoutWaitGroup(t, N, func(j int) {
<-eventChans[j]
}, css)
// 1) new block part
parts := types.NewPartSetFromData(cmn.RandBytes(100), 10)
msg := &BlockPartMessage{
Height: 2,
Round: 0,
Part: parts.GetPart(0),
}
bz, err := cdc.MarshalBinaryBare(msg)
require.NoError(t, err)
// Get peer
peer := reactors[1].Switch.Peers().List()[0]
// Get peer state
ps := peer.Get(types.PeerStateKey).(*PeerState)
reactor.Receive(DataChannel, peer, bz)
require.Equal(t, 1, ps.BlockPartsSent(), "number of block parts sent should have increased by 1")
// 2) block part with the same height, but different round
msg.Round = 1
bz, err = cdc.MarshalBinaryBare(msg)
require.NoError(t, err)
reactor.Receive(DataChannel, peer, bz)
require.Equal(t, 1, ps.BlockPartsSent(), "number of block parts sent should stay the same")
// 3) block part from earlier height
msg.Height = 1
msg.Round = 0
bz, err = cdc.MarshalBinaryBare(msg)
require.NoError(t, err)
reactor.Receive(DataChannel, peer, bz)
require.Equal(t, 1, ps.BlockPartsSent(), "number of block parts sent should stay the same")
}
// Test we record votes from other peers.
func TestReactorRecordsVotes(t *testing.T) {
// Create dummy peer.
peer := p2pdummy.NewPeer()
ps := NewPeerState(peer).SetLogger(log.TestingLogger())
peer.Set(types.PeerStateKey, ps)
// Create reactor.
css := randConsensusNet(1, "consensus_reactor_records_votes_test", newMockTickerFunc(true), newPersistentKVStore)
reactor := NewConsensusReactor(css[0], false) // so we dont start the consensus states
reactor.SetEventBus(css[0].eventBus)
reactor.SetLogger(log.TestingLogger())
sw := p2p.MakeSwitch(cfg.DefaultP2PConfig(), 1, "testing", "123.123.123", func(i int, sw *p2p.Switch) *p2p.Switch { return sw })
reactor.SetSwitch(sw)
err := reactor.Start()
require.NoError(t, err)
defer reactor.Stop()
_, val := css[0].state.Validators.GetByIndex(0)
// 1) new vote
vote := &types.Vote{
ValidatorIndex: 0,
ValidatorAddress: val.Address,
Height: 2,
Round: 0,
Timestamp: tmtime.Now(),
Type: types.VoteTypePrevote,
BlockID: types.BlockID{},
}
bz, err := cdc.MarshalBinaryBare(&VoteMessage{vote})
require.NoError(t, err)
reactor.Receive(VoteChannel, peer, bz)
assert.Equal(t, 1, ps.VotesSent(), "number of votes sent should have increased by 1")
// 2) vote with the same height, but different round
vote.Round = 1
bz, err = cdc.MarshalBinaryBare(&VoteMessage{vote})
require.NoError(t, err)
reactor.Receive(VoteChannel, peer, bz)
assert.Equal(t, 1, ps.VotesSent(), "number of votes sent should stay the same")
// 3) vote from earlier height
vote.Height = 1
vote.Round = 0
bz, err = cdc.MarshalBinaryBare(&VoteMessage{vote})
require.NoError(t, err)
reactor.Receive(VoteChannel, peer, bz)
assert.Equal(t, 1, ps.VotesSent(), "number of votes sent should stay the same")
assert.Equal(t, true, ps.VotesSent() > 0, "number of votes sent should have increased")
assert.Equal(t, true, ps.BlockPartsSent() > 0, "number of votes sent should have increased")
}
//-------------------------------------------------------------

35
consensus/state.go
View File

@ -91,6 +91,10 @@ type ConsensusState struct {
internalMsgQueue chan msgInfo
timeoutTicker TimeoutTicker
// information about about added votes and block parts are written on this channel
// so statistics can be computed by reactor
statsMsgQueue chan msgInfo
// we use eventBus to trigger msg broadcasts in the reactor,
// and to notify external subscribers, eg. through a websocket
eventBus *types.EventBus
@ -141,6 +145,7 @@ func NewConsensusState(
peerMsgQueue: make(chan msgInfo, msgQueueSize),
internalMsgQueue: make(chan msgInfo, msgQueueSize),
timeoutTicker: NewTimeoutTicker(),
statsMsgQueue: make(chan msgInfo, msgQueueSize),
done: make(chan struct{}),
doWALCatchup: true,
wal: nilWAL{},
@ -639,7 +644,11 @@ func (cs *ConsensusState) handleMsg(mi msgInfo) {
err = cs.setProposal(msg.Proposal)
case *BlockPartMessage:
// if the proposal is complete, we'll enterPrevote or tryFinalizeCommit
_, err = cs.addProposalBlockPart(msg, peerID)
added, err := cs.addProposalBlockPart(msg, peerID)
if added {
cs.statsMsgQueue <- mi
}
if err != nil && msg.Round != cs.Round {
cs.Logger.Debug("Received block part from wrong round", "height", cs.Height, "csRound", cs.Round, "blockRound", msg.Round)
err = nil
@ -647,7 +656,11 @@ func (cs *ConsensusState) handleMsg(mi msgInfo) {
case *VoteMessage:
// attempt to add the vote and dupeout the validator if its a duplicate signature
// if the vote gives us a 2/3-any or 2/3-one, we transition
err := cs.tryAddVote(msg.Vote, peerID)
added, err := cs.tryAddVote(msg.Vote, peerID)
if added {
cs.statsMsgQueue <- mi
}
if err == ErrAddingVote {
// TODO: punish peer
// We probably don't want to stop the peer here. The vote does not
@ -1454,7 +1467,7 @@ func (cs *ConsensusState) addProposalBlockPart(msg *BlockPartMessage, peerID p2p
int64(cs.state.ConsensusParams.BlockSize.MaxBytes),
)
if err != nil {
return true, err
return added, err
}
// NOTE: it's possible to receive complete proposal blocks for future rounds without having the proposal
cs.Logger.Info("Received complete proposal block", "height", cs.ProposalBlock.Height, "hash", cs.ProposalBlock.Hash())
@ -1484,35 +1497,35 @@ func (cs *ConsensusState) addProposalBlockPart(msg *BlockPartMessage, peerID p2p
// If we're waiting on the proposal block...
cs.tryFinalizeCommit(height)
}
return true, nil
return added, nil
}
return added, nil
}
// Attempt to add the vote. if its a duplicate signature, dupeout the validator
func (cs *ConsensusState) tryAddVote(vote *types.Vote, peerID p2p.ID) error {
_, err := cs.addVote(vote, peerID)
func (cs *ConsensusState) tryAddVote(vote *types.Vote, peerID p2p.ID) (bool, error) {
added, err := cs.addVote(vote, peerID)
if err != nil {
// If the vote height is off, we'll just ignore it,
// But if it's a conflicting sig, add it to the cs.evpool.
// If it's otherwise invalid, punish peer.
if err == ErrVoteHeightMismatch {
return err
return added, err
} else if voteErr, ok := err.(*types.ErrVoteConflictingVotes); ok {
if bytes.Equal(vote.ValidatorAddress, cs.privValidator.GetAddress()) {
cs.Logger.Error("Found conflicting vote from ourselves. Did you unsafe_reset a validator?", "height", vote.Height, "round", vote.Round, "type", vote.Type)
return err
return added, err
}
cs.evpool.AddEvidence(voteErr.DuplicateVoteEvidence)
return err
return added, err
} else {
// Probably an invalid signature / Bad peer.
// Seems this can also err sometimes with "Unexpected step" - perhaps not from a bad peer ?
cs.Logger.Error("Error attempting to add vote", "err", err)
return ErrAddingVote
return added, ErrAddingVote
}
}
return nil
return added, nil
}
//-----------------------------------------------------------------------------

78
consensus/state_test.go
View File

@ -7,9 +7,13 @@ import (
"testing"
"time"
"github.com/stretchr/testify/require"
cstypes "github.com/tendermint/tendermint/consensus/types"
cmn "github.com/tendermint/tendermint/libs/common"
"github.com/tendermint/tendermint/libs/log"
tmpubsub "github.com/tendermint/tendermint/libs/pubsub"
p2pdummy "github.com/tendermint/tendermint/p2p/dummy"
"github.com/tendermint/tendermint/types"
)
@ -1081,6 +1085,80 @@ func TestStateHalt1(t *testing.T) {
}
}
func TestStateOutputsBlockPartsStats(t *testing.T) {
// create dummy peer
cs, _ := randConsensusState(1)
peer := p2pdummy.NewPeer()
// 1) new block part
parts := types.NewPartSetFromData(cmn.RandBytes(100), 10)
msg := &BlockPartMessage{
Height: 1,
Round: 0,
Part: parts.GetPart(0),
}
cs.ProposalBlockParts = types.NewPartSetFromHeader(parts.Header())
cs.handleMsg(msgInfo{msg, peer.ID()})
statsMessage := <-cs.statsMsgQueue
require.Equal(t, msg, statsMessage.Msg, "")
require.Equal(t, peer.ID(), statsMessage.PeerID, "")
// sending the same part from different peer
cs.handleMsg(msgInfo{msg, "peer2"})
// sending the part with the same height, but different round
msg.Round = 1
cs.handleMsg(msgInfo{msg, peer.ID()})
// sending the part from the smaller height
msg.Height = 0
cs.handleMsg(msgInfo{msg, peer.ID()})
// sending the part from the bigger height
msg.Height = 3
cs.handleMsg(msgInfo{msg, peer.ID()})
select {
case <-cs.statsMsgQueue:
t.Errorf("Should not output stats message after receiving the known block part!")
case <-time.After(50 * time.Millisecond):
}
}
func TestStateOutputVoteStats(t *testing.T) {
cs, vss := randConsensusState(2)
// create dummy peer
peer := p2pdummy.NewPeer()
vote := signVote(vss[1], types.VoteTypePrecommit, []byte("test"), types.PartSetHeader{})
voteMessage := &VoteMessage{vote}
cs.handleMsg(msgInfo{voteMessage, peer.ID()})
statsMessage := <-cs.statsMsgQueue
require.Equal(t, voteMessage, statsMessage.Msg, "")
require.Equal(t, peer.ID(), statsMessage.PeerID, "")
// sending the same part from different peer
cs.handleMsg(msgInfo{&VoteMessage{vote}, "peer2"})
// sending the vote for the bigger height
incrementHeight(vss[1])
vote = signVote(vss[1], types.VoteTypePrecommit, []byte("test"), types.PartSetHeader{})
cs.handleMsg(msgInfo{&VoteMessage{vote}, peer.ID()})
select {
case <-cs.statsMsgQueue:
t.Errorf("Should not output stats message after receiving the known vote or vote from bigger height")
case <-time.After(50 * time.Millisecond):
}
}
// subscribe subscribes test client to the given query and returns a channel with cap = 1.
func subscribe(eventBus *types.EventBus, q tmpubsub.Query) <-chan interface{} {
out := make(chan interface{}, 1)