257 lines
8.6 KiB
Go
257 lines
8.6 KiB
Go
package lp2p
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import (
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"context"
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"time"
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host "github.com/libp2p/go-libp2p-core/host"
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peer "github.com/libp2p/go-libp2p-core/peer"
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pubsub "github.com/libp2p/go-libp2p-pubsub"
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pubsub_pb "github.com/libp2p/go-libp2p-pubsub/pb"
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blake2b "github.com/minio/blake2b-simd"
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ma "github.com/multiformats/go-multiaddr"
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"go.uber.org/fx"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/node/config"
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"github.com/filecoin-project/lotus/node/modules/dtypes"
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"github.com/filecoin-project/lotus/node/modules/helpers"
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)
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func init() {
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// configure larger overlay parameters
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pubsub.GossipSubD = 8
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pubsub.GossipSubDscore = 6
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pubsub.GossipSubDlo = 6
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pubsub.GossipSubDhi = 12
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pubsub.GossipSubDlazy = 12
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pubsub.GossipSubDirectConnectInitialDelay = 30 * time.Second
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}
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func GossipSub(mctx helpers.MetricsCtx, lc fx.Lifecycle, host host.Host, nn dtypes.NetworkName, bp dtypes.BootstrapPeers, cfg *config.Pubsub) (service *pubsub.PubSub, err error) {
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bootstrappers := make(map[peer.ID]struct{})
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for _, pi := range bp {
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bootstrappers[pi.ID] = struct{}{}
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}
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isBootstrapNode := cfg.Bootstrapper
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options := []pubsub.Option{
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// Gossipsubv1.1 configuration
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pubsub.WithFloodPublish(true),
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pubsub.WithPeerScore(
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&pubsub.PeerScoreParams{
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AppSpecificScore: func(p peer.ID) float64 {
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// return a heavy positive score for bootstrappers so that we don't unilaterally prune
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// them and accept PX from them.
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// we don't do that in the bootstrappers themselves to avoid creating a closed mesh
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// between them (however we might want to consider doing just that)
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_, ok := bootstrappers[p]
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if ok && !isBootstrapNode {
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return 2500
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}
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// TODO: we want to plug the application specific score to the node itself in order
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// to provide feedback to the pubsub system based on observed behaviour
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return 0
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},
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AppSpecificWeight: 1,
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// This sets the IP colocation threshold to 1 peer per
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IPColocationFactorThreshold: 1,
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IPColocationFactorWeight: -100,
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// TODO we want to whitelist IPv6 /64s that belong to datacenters etc
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// IPColocationFactorWhitelist: map[string]struct{}{},
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// P7: behavioural penalties, decay after 1hr
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BehaviourPenaltyWeight: -10,
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BehaviourPenaltyDecay: pubsub.ScoreParameterDecay(time.Hour),
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DecayInterval: pubsub.DefaultDecayInterval,
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DecayToZero: pubsub.DefaultDecayToZero,
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// this retains non-positive scores for 6 hours
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RetainScore: 6 * time.Hour,
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// topic parameters
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Topics: map[string]*pubsub.TopicScoreParams{
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build.BlocksTopic(nn): {
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// expected 10 blocks/min
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TopicWeight: 0.1, // max is 50, max mesh penalty is -10, single invalid message is -100
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// 1 tick per second, maxes at 1 after 1 hour
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TimeInMeshWeight: 0.00027, // ~1/3600
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TimeInMeshQuantum: time.Second,
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TimeInMeshCap: 1,
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// deliveries decay after 1 hour, cap at 100 blocks
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FirstMessageDeliveriesWeight: 5, // max value is 500
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FirstMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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FirstMessageDeliveriesCap: 100, // 100 blocks in an hour
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// Mesh Delivery Failure is currently turned off for blocks
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// This is on purpose as
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// - the traffic is very low for meaningful distribution of incoming edges.
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// - the reaction time needs to be very slow -- in the order of 10 min at least
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// so we might as well let opportunistic grafting repair the mesh on its own
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// pace.
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// - the network is too small, so large asymmetries can be expected between mesh
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// edges.
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// We should revisit this once the network grows.
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//
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// // tracks deliveries in the last minute
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// // penalty activates at 1 minute and expects ~0.4 blocks
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// MeshMessageDeliveriesWeight: -576, // max penalty is -100
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// MeshMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Minute),
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// MeshMessageDeliveriesCap: 10, // 10 blocks in a minute
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// MeshMessageDeliveriesThreshold: 0.41666, // 10/12/2 blocks/min
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// MeshMessageDeliveriesWindow: 10 * time.Millisecond,
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// MeshMessageDeliveriesActivation: time.Minute,
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//
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// // decays after 15 min
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// MeshFailurePenaltyWeight: -576,
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// MeshFailurePenaltyDecay: pubsub.ScoreParameterDecay(15 * time.Minute),
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// invalid messages decay after 1 hour
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InvalidMessageDeliveriesWeight: -1000,
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InvalidMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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},
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build.MessagesTopic(nn): {
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// expected > 1 tx/second
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TopicWeight: 0.05, // max is 25, max mesh penalty is -5, single invalid message is -100
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// 1 tick per second, maxes at 1 hour
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TimeInMeshWeight: 0.0002778, // ~1/3600
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TimeInMeshQuantum: time.Second,
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TimeInMeshCap: 1,
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// deliveries decay after 10min, cap at 1000 tx
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FirstMessageDeliveriesWeight: 0.5, // max value is 500
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FirstMessageDeliveriesDecay: pubsub.ScoreParameterDecay(10 * time.Minute),
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FirstMessageDeliveriesCap: 1000,
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// tracks deliveries in the last minute
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// penalty activates at 1 min and expects 2.5 txs
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MeshMessageDeliveriesWeight: -16, // max penalty is -100
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MeshMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Minute),
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MeshMessageDeliveriesCap: 100, // 100 txs in a minute
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MeshMessageDeliveriesThreshold: 2.5, // 60/12/2 txs/minute
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MeshMessageDeliveriesWindow: 10 * time.Millisecond,
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MeshMessageDeliveriesActivation: time.Minute,
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// decays after 5min
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MeshFailurePenaltyWeight: -16,
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MeshFailurePenaltyDecay: pubsub.ScoreParameterDecay(5 * time.Minute),
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// invalid messages decay after 1 hour
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InvalidMessageDeliveriesWeight: -2000,
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InvalidMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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},
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},
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},
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&pubsub.PeerScoreThresholds{
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GossipThreshold: -500,
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PublishThreshold: -1000,
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GraylistThreshold: -2500,
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AcceptPXThreshold: 1000,
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OpportunisticGraftThreshold: 2.5,
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},
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),
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}
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// enable Peer eXchange on bootstrappers
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if isBootstrapNode {
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// turn off the mesh in bootstrappers -- only do gossip and PX
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pubsub.GossipSubD = 0
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pubsub.GossipSubDscore = 0
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pubsub.GossipSubDlo = 0
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pubsub.GossipSubDhi = 0
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pubsub.GossipSubDlazy = 1024
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pubsub.GossipSubGossipFactor = 0.5
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// turn on PX
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options = append(options, pubsub.WithPeerExchange(true))
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}
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// direct peers
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if cfg.DirectPeers != nil {
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var directPeerInfo []peer.AddrInfo
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for _, addr := range cfg.DirectPeers {
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a, err := ma.NewMultiaddr(addr)
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if err != nil {
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return nil, err
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}
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pi, err := peer.AddrInfoFromP2pAddr(a)
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if err != nil {
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return nil, err
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}
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directPeerInfo = append(directPeerInfo, *pi)
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}
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options = append(options, pubsub.WithDirectPeers(directPeerInfo))
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}
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// tracer
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if cfg.RemoteTracer != "" {
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a, err := ma.NewMultiaddr(cfg.RemoteTracer)
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if err != nil {
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return nil, err
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}
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pi, err := peer.AddrInfoFromP2pAddr(a)
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if err != nil {
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return nil, err
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}
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tr, err := pubsub.NewRemoteTracer(context.TODO(), host, *pi)
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if err != nil {
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return nil, err
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}
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trw := newTracerWrapper(tr)
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options = append(options, pubsub.WithEventTracer(trw))
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}
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// TODO: we want to hook the peer score inspector so that we can gain visibility
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// in peer scores for debugging purposes -- this might be trigged by metrics collection
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// options = append(options, pubsub.WithPeerScoreInspect(XXX, time.Second))
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return pubsub.NewGossipSub(helpers.LifecycleCtx(mctx, lc), host, options...)
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}
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func HashMsgId(m *pubsub_pb.Message) string {
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hash := blake2b.Sum256(m.Data)
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return string(hash[:])
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}
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func newTracerWrapper(tr pubsub.EventTracer) pubsub.EventTracer {
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return &tracerWrapper{tr: tr}
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}
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type tracerWrapper struct {
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tr pubsub.EventTracer
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}
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func (trw *tracerWrapper) Trace(evt *pubsub_pb.TraceEvent) {
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// this filters the trace events reported to the remote tracer to include only
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// JOIN/LEAVE/GRAFT/PRUNE/PUBLISH/DELIVER. This significantly reduces bandwidth usage and still
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// collects enough data to recover the state of the mesh and compute message delivery latency
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// distributions.
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// TODO: hook all events into local metrics for inspection through the dashboard
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switch evt.GetType() {
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case pubsub_pb.TraceEvent_PUBLISH_MESSAGE:
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trw.tr.Trace(evt)
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case pubsub_pb.TraceEvent_DELIVER_MESSAGE:
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trw.tr.Trace(evt)
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case pubsub_pb.TraceEvent_JOIN:
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trw.tr.Trace(evt)
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case pubsub_pb.TraceEvent_LEAVE:
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trw.tr.Trace(evt)
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case pubsub_pb.TraceEvent_GRAFT:
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trw.tr.Trace(evt)
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case pubsub_pb.TraceEvent_PRUNE:
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trw.tr.Trace(evt)
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}
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}
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