583 lines
18 KiB
Go
583 lines
18 KiB
Go
// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package discovery
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import (
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"context"
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"encoding/json"
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"errors"
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"flag"
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"fmt"
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"io/ioutil"
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"math/rand"
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"os"
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"path"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/p2p/simulations"
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"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
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"github.com/ethereum/go-ethereum/swarm/network"
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"github.com/ethereum/go-ethereum/swarm/state"
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colorable "github.com/mattn/go-colorable"
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)
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// serviceName is used with the exec adapter so the exec'd binary knows which
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// service to execute
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const serviceName = "discovery"
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const testMinProxBinSize = 2
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const discoveryPersistenceDatadir = "discovery_persistence_test_store"
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var discoveryPersistencePath = path.Join(os.TempDir(), discoveryPersistenceDatadir)
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var discoveryEnabled = true
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var persistenceEnabled = false
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var services = adapters.Services{
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serviceName: newService,
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}
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func cleanDbStores() error {
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entries, err := ioutil.ReadDir(os.TempDir())
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if err != nil {
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return err
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}
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for _, f := range entries {
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if strings.HasPrefix(f.Name(), discoveryPersistenceDatadir) {
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os.RemoveAll(path.Join(os.TempDir(), f.Name()))
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}
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}
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return nil
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}
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func getDbStore(nodeID string) (*state.DBStore, error) {
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if _, err := os.Stat(discoveryPersistencePath + "_" + nodeID); os.IsNotExist(err) {
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log.Info(fmt.Sprintf("directory for nodeID %s does not exist. creating...", nodeID))
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ioutil.TempDir("", discoveryPersistencePath+"_"+nodeID)
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}
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log.Info(fmt.Sprintf("opening storage directory for nodeID %s", nodeID))
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store, err := state.NewDBStore(discoveryPersistencePath + "_" + nodeID)
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if err != nil {
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return nil, err
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}
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return store, nil
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}
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var (
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nodeCount = flag.Int("nodes", 10, "number of nodes to create (default 10)")
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initCount = flag.Int("conns", 1, "number of originally connected peers (default 1)")
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snapshotFile = flag.String("snapshot", "", "create snapshot")
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loglevel = flag.Int("loglevel", 3, "verbosity of logs")
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rawlog = flag.Bool("rawlog", false, "remove terminal formatting from logs")
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)
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func init() {
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flag.Parse()
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// register the discovery service which will run as a devp2p
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// protocol when using the exec adapter
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adapters.RegisterServices(services)
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log.PrintOrigins(true)
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log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(*loglevel), log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(!*rawlog))))
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}
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// Benchmarks to test the average time it takes for an N-node ring
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// to full a healthy kademlia topology
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func BenchmarkDiscovery_8_1(b *testing.B) { benchmarkDiscovery(b, 8, 1) }
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func BenchmarkDiscovery_16_1(b *testing.B) { benchmarkDiscovery(b, 16, 1) }
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func BenchmarkDiscovery_32_1(b *testing.B) { benchmarkDiscovery(b, 32, 1) }
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func BenchmarkDiscovery_64_1(b *testing.B) { benchmarkDiscovery(b, 64, 1) }
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func BenchmarkDiscovery_128_1(b *testing.B) { benchmarkDiscovery(b, 128, 1) }
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func BenchmarkDiscovery_256_1(b *testing.B) { benchmarkDiscovery(b, 256, 1) }
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func BenchmarkDiscovery_8_2(b *testing.B) { benchmarkDiscovery(b, 8, 2) }
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func BenchmarkDiscovery_16_2(b *testing.B) { benchmarkDiscovery(b, 16, 2) }
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func BenchmarkDiscovery_32_2(b *testing.B) { benchmarkDiscovery(b, 32, 2) }
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func BenchmarkDiscovery_64_2(b *testing.B) { benchmarkDiscovery(b, 64, 2) }
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func BenchmarkDiscovery_128_2(b *testing.B) { benchmarkDiscovery(b, 128, 2) }
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func BenchmarkDiscovery_256_2(b *testing.B) { benchmarkDiscovery(b, 256, 2) }
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func BenchmarkDiscovery_8_4(b *testing.B) { benchmarkDiscovery(b, 8, 4) }
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func BenchmarkDiscovery_16_4(b *testing.B) { benchmarkDiscovery(b, 16, 4) }
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func BenchmarkDiscovery_32_4(b *testing.B) { benchmarkDiscovery(b, 32, 4) }
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func BenchmarkDiscovery_64_4(b *testing.B) { benchmarkDiscovery(b, 64, 4) }
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func BenchmarkDiscovery_128_4(b *testing.B) { benchmarkDiscovery(b, 128, 4) }
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func BenchmarkDiscovery_256_4(b *testing.B) { benchmarkDiscovery(b, 256, 4) }
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func TestDiscoverySimulationDockerAdapter(t *testing.T) {
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testDiscoverySimulationDockerAdapter(t, *nodeCount, *initCount)
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}
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func testDiscoverySimulationDockerAdapter(t *testing.T, nodes, conns int) {
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adapter, err := adapters.NewDockerAdapter()
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if err != nil {
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if err == adapters.ErrLinuxOnly {
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t.Skip(err)
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} else {
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t.Fatal(err)
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}
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}
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testDiscoverySimulation(t, nodes, conns, adapter)
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}
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func TestDiscoverySimulationExecAdapter(t *testing.T) {
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testDiscoverySimulationExecAdapter(t, *nodeCount, *initCount)
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}
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func testDiscoverySimulationExecAdapter(t *testing.T, nodes, conns int) {
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baseDir, err := ioutil.TempDir("", "swarm-test")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(baseDir)
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testDiscoverySimulation(t, nodes, conns, adapters.NewExecAdapter(baseDir))
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}
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func TestDiscoverySimulationSimAdapter(t *testing.T) {
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testDiscoverySimulationSimAdapter(t, *nodeCount, *initCount)
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}
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func TestDiscoveryPersistenceSimulationSimAdapter(t *testing.T) {
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testDiscoveryPersistenceSimulationSimAdapter(t, *nodeCount, *initCount)
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}
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func testDiscoveryPersistenceSimulationSimAdapter(t *testing.T, nodes, conns int) {
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testDiscoveryPersistenceSimulation(t, nodes, conns, adapters.NewSimAdapter(services))
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}
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func testDiscoverySimulationSimAdapter(t *testing.T, nodes, conns int) {
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testDiscoverySimulation(t, nodes, conns, adapters.NewSimAdapter(services))
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}
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func testDiscoverySimulation(t *testing.T, nodes, conns int, adapter adapters.NodeAdapter) {
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startedAt := time.Now()
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result, err := discoverySimulation(nodes, conns, adapter)
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if err != nil {
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t.Fatalf("Setting up simulation failed: %v", err)
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}
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if result.Error != nil {
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t.Fatalf("Simulation failed: %s", result.Error)
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}
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t.Logf("Simulation with %d nodes passed in %s", nodes, result.FinishedAt.Sub(result.StartedAt))
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var min, max time.Duration
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var sum int
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for _, pass := range result.Passes {
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duration := pass.Sub(result.StartedAt)
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if sum == 0 || duration < min {
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min = duration
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}
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if duration > max {
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max = duration
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}
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sum += int(duration.Nanoseconds())
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}
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t.Logf("Min: %s, Max: %s, Average: %s", min, max, time.Duration(sum/len(result.Passes))*time.Nanosecond)
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finishedAt := time.Now()
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t.Logf("Setup: %s, shutdown: %s", result.StartedAt.Sub(startedAt), finishedAt.Sub(result.FinishedAt))
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}
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func testDiscoveryPersistenceSimulation(t *testing.T, nodes, conns int, adapter adapters.NodeAdapter) map[int][]byte {
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persistenceEnabled = true
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discoveryEnabled = true
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result, err := discoveryPersistenceSimulation(nodes, conns, adapter)
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if err != nil {
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t.Fatalf("Setting up simulation failed: %v", err)
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}
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if result.Error != nil {
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t.Fatalf("Simulation failed: %s", result.Error)
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}
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t.Logf("Simulation with %d nodes passed in %s", nodes, result.FinishedAt.Sub(result.StartedAt))
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// set the discovery and persistence flags again to default so other
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// tests will not be affected
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discoveryEnabled = true
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persistenceEnabled = false
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return nil
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}
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func benchmarkDiscovery(b *testing.B, nodes, conns int) {
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for i := 0; i < b.N; i++ {
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result, err := discoverySimulation(nodes, conns, adapters.NewSimAdapter(services))
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if err != nil {
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b.Fatalf("setting up simulation failed: %v", err)
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}
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if result.Error != nil {
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b.Logf("simulation failed: %s", result.Error)
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}
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}
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}
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func discoverySimulation(nodes, conns int, adapter adapters.NodeAdapter) (*simulations.StepResult, error) {
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// create network
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net := simulations.NewNetwork(adapter, &simulations.NetworkConfig{
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ID: "0",
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DefaultService: serviceName,
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})
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defer net.Shutdown()
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trigger := make(chan enode.ID)
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ids := make([]enode.ID, nodes)
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for i := 0; i < nodes; i++ {
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conf := adapters.RandomNodeConfig()
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node, err := net.NewNodeWithConfig(conf)
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if err != nil {
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return nil, fmt.Errorf("error starting node: %s", err)
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}
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if err := net.Start(node.ID()); err != nil {
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return nil, fmt.Errorf("error starting node %s: %s", node.ID().TerminalString(), err)
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}
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if err := triggerChecks(trigger, net, node.ID()); err != nil {
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return nil, fmt.Errorf("error triggering checks for node %s: %s", node.ID().TerminalString(), err)
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}
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ids[i] = node.ID()
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}
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// run a simulation which connects the 10 nodes in a ring and waits
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// for full peer discovery
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var addrs [][]byte
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action := func(ctx context.Context) error {
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return nil
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}
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wg := sync.WaitGroup{}
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for i := range ids {
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// collect the overlay addresses, to
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addrs = append(addrs, ids[i].Bytes())
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for j := 0; j < conns; j++ {
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var k int
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if j == 0 {
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k = (i + 1) % len(ids)
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} else {
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k = rand.Intn(len(ids))
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}
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wg.Add(1)
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go func(i, k int) {
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defer wg.Done()
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net.Connect(ids[i], ids[k])
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}(i, k)
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}
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}
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wg.Wait()
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log.Debug(fmt.Sprintf("nodes: %v", len(addrs)))
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// construct the peer pot, so that kademlia health can be checked
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ppmap := network.NewPeerPotMap(testMinProxBinSize, addrs)
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check := func(ctx context.Context, id enode.ID) (bool, error) {
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select {
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case <-ctx.Done():
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return false, ctx.Err()
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default:
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}
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node := net.GetNode(id)
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if node == nil {
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return false, fmt.Errorf("unknown node: %s", id)
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}
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client, err := node.Client()
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if err != nil {
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return false, fmt.Errorf("error getting node client: %s", err)
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}
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healthy := &network.Health{}
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if err := client.Call(&healthy, "hive_healthy", ppmap[id.String()]); err != nil {
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return false, fmt.Errorf("error getting node health: %s", err)
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}
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log.Debug(fmt.Sprintf("node %4s healthy: got nearest neighbours: %v, know nearest neighbours: %v, saturated: %v\n%v", id, healthy.GotNN, healthy.KnowNN, healthy.Full, healthy.Hive))
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return healthy.KnowNN && healthy.GotNN && healthy.Full, nil
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}
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// 64 nodes ~ 1min
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// 128 nodes ~
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timeout := 300 * time.Second
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel()
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result := simulations.NewSimulation(net).Run(ctx, &simulations.Step{
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Action: action,
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Trigger: trigger,
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Expect: &simulations.Expectation{
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Nodes: ids,
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Check: check,
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},
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})
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if result.Error != nil {
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return result, nil
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}
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if *snapshotFile != "" {
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snap, err := net.Snapshot()
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if err != nil {
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return nil, errors.New("no shapshot dude")
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}
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jsonsnapshot, err := json.Marshal(snap)
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if err != nil {
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return nil, fmt.Errorf("corrupt json snapshot: %v", err)
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}
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log.Info("writing snapshot", "file", *snapshotFile)
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err = ioutil.WriteFile(*snapshotFile, jsonsnapshot, 0755)
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if err != nil {
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return nil, err
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}
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}
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return result, nil
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}
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func discoveryPersistenceSimulation(nodes, conns int, adapter adapters.NodeAdapter) (*simulations.StepResult, error) {
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cleanDbStores()
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defer cleanDbStores()
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// create network
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net := simulations.NewNetwork(adapter, &simulations.NetworkConfig{
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ID: "0",
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DefaultService: serviceName,
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})
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defer net.Shutdown()
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trigger := make(chan enode.ID)
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ids := make([]enode.ID, nodes)
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var addrs [][]byte
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for i := 0; i < nodes; i++ {
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conf := adapters.RandomNodeConfig()
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node, err := net.NewNodeWithConfig(conf)
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if err != nil {
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panic(err)
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}
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if err != nil {
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return nil, fmt.Errorf("error starting node: %s", err)
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}
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if err := net.Start(node.ID()); err != nil {
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return nil, fmt.Errorf("error starting node %s: %s", node.ID().TerminalString(), err)
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}
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if err := triggerChecks(trigger, net, node.ID()); err != nil {
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return nil, fmt.Errorf("error triggering checks for node %s: %s", node.ID().TerminalString(), err)
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}
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ids[i] = node.ID()
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a := ids[i].Bytes()
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addrs = append(addrs, a)
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}
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// run a simulation which connects the 10 nodes in a ring and waits
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// for full peer discovery
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ppmap := network.NewPeerPotMap(testMinProxBinSize, addrs)
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var restartTime time.Time
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action := func(ctx context.Context) error {
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ticker := time.NewTicker(500 * time.Millisecond)
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for range ticker.C {
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isHealthy := true
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for _, id := range ids {
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//call Healthy RPC
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node := net.GetNode(id)
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if node == nil {
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return fmt.Errorf("unknown node: %s", id)
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}
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client, err := node.Client()
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if err != nil {
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return fmt.Errorf("error getting node client: %s", err)
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}
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healthy := &network.Health{}
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addr := id.String()
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if err := client.Call(&healthy, "hive_healthy", ppmap[addr]); err != nil {
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return fmt.Errorf("error getting node health: %s", err)
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}
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log.Info(fmt.Sprintf("NODE: %s, IS HEALTHY: %t", addr, healthy.GotNN && healthy.KnowNN && healthy.Full))
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if !healthy.GotNN || !healthy.Full {
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isHealthy = false
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break
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}
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}
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if isHealthy {
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break
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}
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}
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ticker.Stop()
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log.Info("reached healthy kademlia. starting to shutdown nodes.")
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shutdownStarted := time.Now()
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// stop all ids, then start them again
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for _, id := range ids {
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node := net.GetNode(id)
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if err := net.Stop(node.ID()); err != nil {
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return fmt.Errorf("error stopping node %s: %s", node.ID().TerminalString(), err)
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}
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}
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log.Info(fmt.Sprintf("shutting down nodes took: %s", time.Since(shutdownStarted)))
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persistenceEnabled = true
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discoveryEnabled = false
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restartTime = time.Now()
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for _, id := range ids {
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node := net.GetNode(id)
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if err := net.Start(node.ID()); err != nil {
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return fmt.Errorf("error starting node %s: %s", node.ID().TerminalString(), err)
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}
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if err := triggerChecks(trigger, net, node.ID()); err != nil {
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return fmt.Errorf("error triggering checks for node %s: %s", node.ID().TerminalString(), err)
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}
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}
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log.Info(fmt.Sprintf("restarting nodes took: %s", time.Since(restartTime)))
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return nil
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}
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//connects in a chain
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wg := sync.WaitGroup{}
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//connects in a ring
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for i := range ids {
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for j := 1; j <= conns; j++ {
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k := (i + j) % len(ids)
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if k == i {
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k = (k + 1) % len(ids)
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}
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wg.Add(1)
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go func(i, k int) {
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defer wg.Done()
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net.Connect(ids[i], ids[k])
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}(i, k)
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}
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}
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wg.Wait()
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log.Debug(fmt.Sprintf("nodes: %v", len(addrs)))
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// construct the peer pot, so that kademlia health can be checked
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check := func(ctx context.Context, id enode.ID) (bool, error) {
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select {
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case <-ctx.Done():
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return false, ctx.Err()
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default:
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}
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node := net.GetNode(id)
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if node == nil {
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return false, fmt.Errorf("unknown node: %s", id)
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}
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client, err := node.Client()
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if err != nil {
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return false, fmt.Errorf("error getting node client: %s", err)
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}
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healthy := &network.Health{}
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if err := client.Call(&healthy, "hive_healthy", ppmap[id.String()]); err != nil {
|
|
return false, fmt.Errorf("error getting node health: %s", err)
|
|
}
|
|
log.Info(fmt.Sprintf("node %4s healthy: got nearest neighbours: %v, know nearest neighbours: %v, saturated: %v", id, healthy.GotNN, healthy.KnowNN, healthy.Full))
|
|
|
|
return healthy.KnowNN && healthy.GotNN && healthy.Full, nil
|
|
}
|
|
|
|
// 64 nodes ~ 1min
|
|
// 128 nodes ~
|
|
timeout := 300 * time.Second
|
|
ctx, cancel := context.WithTimeout(context.Background(), timeout)
|
|
defer cancel()
|
|
result := simulations.NewSimulation(net).Run(ctx, &simulations.Step{
|
|
Action: action,
|
|
Trigger: trigger,
|
|
Expect: &simulations.Expectation{
|
|
Nodes: ids,
|
|
Check: check,
|
|
},
|
|
})
|
|
if result.Error != nil {
|
|
return result, nil
|
|
}
|
|
|
|
return result, nil
|
|
}
|
|
|
|
// triggerChecks triggers a simulation step check whenever a peer is added or
|
|
// removed from the given node, and also every second to avoid a race between
|
|
// peer events and kademlia becoming healthy
|
|
func triggerChecks(trigger chan enode.ID, net *simulations.Network, id enode.ID) error {
|
|
node := net.GetNode(id)
|
|
if node == nil {
|
|
return fmt.Errorf("unknown node: %s", id)
|
|
}
|
|
client, err := node.Client()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
events := make(chan *p2p.PeerEvent)
|
|
sub, err := client.Subscribe(context.Background(), "admin", events, "peerEvents")
|
|
if err != nil {
|
|
return fmt.Errorf("error getting peer events for node %v: %s", id, err)
|
|
}
|
|
go func() {
|
|
defer sub.Unsubscribe()
|
|
|
|
tick := time.NewTicker(time.Second)
|
|
defer tick.Stop()
|
|
|
|
for {
|
|
select {
|
|
case <-events:
|
|
trigger <- id
|
|
case <-tick.C:
|
|
trigger <- id
|
|
case err := <-sub.Err():
|
|
if err != nil {
|
|
log.Error(fmt.Sprintf("error getting peer events for node %v", id), "err", err)
|
|
}
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
return nil
|
|
}
|
|
|
|
func newService(ctx *adapters.ServiceContext) (node.Service, error) {
|
|
node := enode.NewV4(&ctx.Config.PrivateKey.PublicKey, adapters.ExternalIP(), int(ctx.Config.Port), int(ctx.Config.Port))
|
|
addr := network.NewAddr(node)
|
|
|
|
kp := network.NewKadParams()
|
|
kp.MinProxBinSize = testMinProxBinSize
|
|
|
|
if ctx.Config.Reachable != nil {
|
|
kp.Reachable = func(o *network.BzzAddr) bool {
|
|
return ctx.Config.Reachable(o.ID())
|
|
}
|
|
}
|
|
kad := network.NewKademlia(addr.Over(), kp)
|
|
hp := network.NewHiveParams()
|
|
hp.KeepAliveInterval = time.Duration(200) * time.Millisecond
|
|
hp.Discovery = discoveryEnabled
|
|
|
|
log.Info(fmt.Sprintf("discovery for nodeID %s is %t", ctx.Config.ID.String(), hp.Discovery))
|
|
|
|
config := &network.BzzConfig{
|
|
OverlayAddr: addr.Over(),
|
|
UnderlayAddr: addr.Under(),
|
|
HiveParams: hp,
|
|
}
|
|
|
|
if persistenceEnabled {
|
|
log.Info(fmt.Sprintf("persistence enabled for nodeID %s", ctx.Config.ID.String()))
|
|
store, err := getDbStore(ctx.Config.ID.String())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return network.NewBzz(config, kad, store, nil, nil), nil
|
|
}
|
|
|
|
return network.NewBzz(config, kad, nil, nil, nil), nil
|
|
}
|