run drand gossip relays alongside each drand node

lotus-soup/drand.go

@@ -3,12 +3,20 @@ package main
 import (
 	"bytes"
 	"context"
+	"encoding/hex"
+	"encoding/json"
 	"fmt"
+	"net"
+	"os"
 	"time"
 
 	"github.com/drand/drand/chain"
 	hclient "github.com/drand/drand/client/http"
+	"github.com/drand/drand/log"
+	"github.com/drand/drand/lp2p"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
+	"github.com/libp2p/go-libp2p-core/peer"
+	ma "github.com/multiformats/go-multiaddr"
 	"github.com/testground/sdk-go/sync"
 
 	"github.com/drand/drand/demo/node"
@@ -16,13 +24,23 @@ import (
 
 var (
 	PrepareDrandTimeout = time.Minute
-	drandConfigTopic = sync.NewTopic("drand-config", &dtypes.DrandConfig{})
+	drandConfigTopic    = sync.NewTopic("drand-config", &DrandRuntimeInfo{})
 )
 
+type DrandRuntimeInfo struct {
+	Config          dtypes.DrandConfig
+	GossipBootstrap dtypes.DrandBootstrap
+}
+
+type DrandInstance struct {
+	Node node.Node
+	GossipRelay *lp2p.GossipRelayNode
+}
+
 // waitForDrandConfig should be called by filecoin instances before constructing the lotus Node
 // you can use the returned dtypes.DrandConfig to override the default production config.
-func waitForDrandConfig(ctx context.Context, client sync.Client) (*dtypes.DrandConfig, error) {
+func waitForDrandConfig(ctx context.Context, client sync.Client) (*DrandRuntimeInfo, error) {
-	ch := make(chan *dtypes.DrandConfig, 1)
+	ch := make(chan *DrandRuntimeInfo, 1)
 	sub := client.MustSubscribe(ctx, drandConfigTopic, ch)
 	select {
 	case cfg := <-ch:
@@ -35,7 +53,7 @@ func waitForDrandConfig(ctx context.Context, client sync.Client) (*dtypes.DrandC
 // prepareDrandNode starts a drand instance and runs a DKG with the other members of the composition group.
 // Once the chain is running, the leader publishes the chain info needed by lotus nodes on
 // drandConfigTopic
-func prepareDrandNode(t *TestEnvironment) (node.Node, error) {
+func prepareDrandNode(t *TestEnvironment) (*DrandInstance, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), PrepareDrandTimeout)
 	defer cancel()
 
@@ -46,13 +64,14 @@ func prepareDrandNode(t *TestEnvironment) (node.Node, error) {
 	nNodes := t.TestGroupInstanceCount
 
 	myAddr := t.NetClient.MustGetDataNetworkIP()
-	// TODO: add test params for drand
+	period := t.DurationParam("drand_period")
-	period := "10s"
+	threshold := t.IntParam("drand_threshold")
-	beaconOffset := 12
+	runGossipRelay := t.BooleanParam("drand_gossip_relay")
-	threshold := 2
+
+	beaconOffset := 3
 
 	// TODO(maybe): use TLS?
-	n := node.NewLocalNode(int(seq), period, "~/", false, myAddr.String())
+	n := node.NewLocalNode(int(seq), period.String(), "~/", false, myAddr.String())
 
 	// share the node addresses with other nodes
 	// TODO: if we implement TLS, this is where we'd share public TLS keys
@@ -107,21 +126,25 @@ func prepareDrandNode(t *TestEnvironment) (node.Node, error) {
 
 	// run DKG
 	t.SyncClient.MustSignalAndWait(ctx, "drand-dkg-start", nNodes)
-	grp := n.RunDKG(nNodes, threshold, period, isLeader, leaderAddr, beaconOffset)
+	if !isLeader {
+		time.Sleep(time.Second)
+	}
+	grp := n.RunDKG(nNodes, threshold, period.String(), isLeader, leaderAddr, beaconOffset)
 	if grp == nil {
 		return nil, fmt.Errorf("drand dkg failed")
 	}
 	t.R().RecordPoint("drand_dkg_complete", time.Now().Sub(startTime).Seconds())
 
+	t.RecordMessage("drand dkg complete, waiting for chain start")
 	// wait for chain to begin
 	to := time.Until(time.Unix(grp.GenesisTime, 0).Add(3 * time.Second).Add(grp.Period))
 	time.Sleep(to)
 
-
+	t.RecordMessage("drand beacon chain started, fetching initial round via http")
-
 	// verify that we can get a round of randomness from the chain using an http client
 	info := chain.NewChainInfo(grp)
-	client, err := hclient.NewWithInfo(publicAddrs[0], info, nil)
+	myPublicAddr := fmt.Sprintf("http://%s", n.PublicAddr())
+	client, err := hclient.NewWithInfo(myPublicAddr, info, nil)
 	if err != nil {
 		return nil, fmt.Errorf("unable to create drand http client: %w", err)
 	}
@@ -131,18 +154,73 @@ func prepareDrandNode(t *TestEnvironment) (node.Node, error) {
 		return nil, fmt.Errorf("unable to get initial drand round: %w", err)
 	}
 
+	// start gossip relay (unless disabled via testplan parameter)
+	var gossipRelay *lp2p.GossipRelayNode
+	var relayAddrs []peer.AddrInfo
+
+	if runGossipRelay {
+		_ = os.Mkdir("~/drand-gossip", os.ModePerm)
+		listenAddr := fmt.Sprintf("/ip4/%s/tcp/7777", myAddr.String())
+		relayCfg := lp2p.GossipRelayConfig{
+			ChainHash:    hex.EncodeToString(info.Hash()),
+			Addr:         listenAddr,
+			DataDir:      "~/drand-gossip",
+			IdentityPath: "~/drand-gossip/identity.key",
+			Insecure:     true,
+			Client:       client,
+		}
+		t.RecordMessage("starting drand gossip relay")
+		var err error
+		gossipRelay, err = lp2p.NewGossipRelayNode(log.DefaultLogger, &relayCfg)
+		if err != nil {
+			return nil, fmt.Errorf("failed to construct drand gossip relay: %w", err)
+		}
+
+		t.RecordMessage("sharing gossip relay addrs")
+		// share the gossip relay addrs so we can publish them in DrandRuntimeInfo
+		relayInfo, err := relayAddrInfo(gossipRelay.Multiaddrs(), myAddr)
+		if err != nil {
+			return nil, err
+		}
+		infoCh := make(chan *peer.AddrInfo, nNodes)
+		infoTopic := sync.NewTopic("drand-gossip-addrs", &peer.AddrInfo{})
+		t.SyncClient.MustPublishSubscribe(ctx, infoTopic, relayInfo, infoCh)
+		for i := 0; i < nNodes; i++ {
+			ai := <-infoCh
+			relayAddrs = append(relayAddrs, *ai)
+		}
+	}
+
 	// if we're the leader, publish the config to the sync service
 	if isLeader {
 		buf := bytes.Buffer{}
 		if err := info.ToJSON(&buf); err != nil {
 			return nil, fmt.Errorf("error marshaling chain info: %w", err)
 		}
-		msg := dtypes.DrandConfig{
+		cfg := DrandRuntimeInfo{
+			Config: dtypes.DrandConfig{
 				Servers:       publicAddrs,
 				ChainInfoJSON: buf.String(),
+			},
+			GossipBootstrap: relayAddrs,
 		}
-		t.SyncClient.MustPublish(ctx, drandConfigTopic, &msg)
+		dump, _ := json.Marshal(cfg)
+		t.RecordMessage("publishing drand config on sync topic: %s", string(dump))
+		t.SyncClient.MustPublish(ctx, drandConfigTopic, &cfg)
 	}
 
-	return n, nil
+	return &DrandInstance{
+		Node: n,
+		GossipRelay: gossipRelay,
+	}, nil
+}
+
+func relayAddrInfo(addrs []ma.Multiaddr, dataIP net.IP) (*peer.AddrInfo, error) {
+	for _, a := range addrs {
+		if ip, _ := a.ValueForProtocol(ma.P_IP4); ip != dataIP.String() {
+			continue
+		}
+		return peer.AddrInfoFromP2pAddr(a)
+	}
+	return nil, fmt.Errorf("no addr found with data ip %s in addrs: %v", dataIP, addrs)
 }

lotus-soup/manifest.toml

@@ -27,5 +27,11 @@ instances = { min = 1, max = 100, default = 5 }
   miners = { type = "int", default = 1 }
   balance = { type = "int", default = 1 }
   sectors = { type = "int", default = 1 }
-  real_drand = { type = "bool", default = "false", desc = "set to true to use the real drand network config baked into lotus" }
   role = { type = "string" }
+
+  real_drand = { type = "bool", default = "false", desc = "set to true to use the real drand network config baked into lotus. otherwise, make sure there's a group with role='drand' and at least 2 nodes" }
+
+  # params relevant to drand nodes:
+  drand_period = { type = "duration", default="10s" }
+  drand_threshold = { type = "int", default = 2 }
+  drand_gossip_relay = { type = "bool", default = true }

lotus-soup/node.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"crypto/rand"
 	"os"
+	"strings"
 
 	//"encoding/json"
 	"fmt"
@@ -82,6 +83,15 @@ type TestEnvironment struct {
 	*run.InitContext
 }
 
+func (t *TestEnvironment) DurationParam(name string) time.Duration {
+	s := strings.ReplaceAll(t.StringParam(name), "\"", "")
+	d, err := time.ParseDuration(s)
+	if err != nil {
+		panic(fmt.Errorf("invalid duration value for param '%s': %w", name, err))
+	}
+	return d
+}
+
 type Node struct {
 	fullApi  api.FullNode
 	minerApi api.StorageMiner
@@ -668,11 +678,8 @@ func getDrandConfig(ctx context.Context, t *TestEnvironment) (node.Option, error
 		return nil, err
 	}
 	t.RecordMessage("setting drand config: %v", cfg)
-
 	return node.Options(
-		node.Override(new(dtypes.DrandConfig), *cfg),
+		node.Override(new(dtypes.DrandConfig), cfg.Config),
-
+		node.Override(new(dtypes.DrandBootstrap), cfg.GossipBootstrap),
-		// FIXME: re-enable drand bootstrap peers once drand gossip relays are running in testground
-		node.Override(new(dtypes.DrandBootstrap), dtypes.DrandBootstrap{}),
 	), nil
 }